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GERMANY SPAIN and PORTUGAL UNITED KINGDOM SWITZERLAND Bourdon-Haenni GmbH Schwieberdinger Strasse 50 D-70435 Stuttgart Tel.: +49 (0) 711 50 35-0 Fax: +49 (0) 711 50 35-175 e-mail: [email protected] Bourdon-Haenni S.A.S Establecimiento Permanente C/ Llacuna 162 08018 Barcelona, España Tel.: +34 93 403 74 04 Fax: +34 93 403 74 05 e-mail: [email protected] Bourdon-Haenni Limited UnitA Central Estate -Albert Road Aldershot GU11 1SZ Tel.: +44 (0) 870 161 3000 Fax: +44 (0) 870 161 3030 e-mail: [email protected] Bourdon-Haenni AG Bernstrasse 59 CH-3303 Jegenstorf Tel.: +41 (0)31 764 99 55 Fax: +41 (0)31 764 99 66 e-mail: [email protected] BENELUX FRANCE SINGAPORE VENEZUELA Bourdon-Haenni Benelux Rue de Nieuwenhove, 45 1180 Bruxelles, Belgique Tel. : +32 (0)2 344 18 14 Fax : +32 (0)2 344 08 36 e-mail: [email protected] Bourdon-Haenni S.A.S. 125, rue de la Marre - BP 214 41103 Vendôme cedex Tel.: +33 (0)2 54 73 74 75 Fax: +33 (0)2 54 73 74 74 e-mail: [email protected] Bourdon-Haenni ASIA PTE LTD Blk 21, Kallang Avenue #03-173 Kallang Basin Industrial Estate Singapour 339412 Tel.: +65 291 26 77 Fax: +65 291 20 77 e-mail: [email protected] Bourdon-Haenni America Latina Av Ppal. Urb. Lebrun Local 41-A- Petare, Ap.70817 Caracas 1070 Tel.: +58 212 256 9336 Fax: +58 212 256 7030 e-mail: [email protected] DENMARK POLAND SWEDEN Bourdon-Haenni A/S Jacob Knudsens Vej 14 DK-8230 Aabyhøj Tel.: +45 89 31 76 11 Fax: +45 86 25 65 77 e-mail: [email protected] Bourdon-Haenni Ul. Rydygiera 12, Apt. 605 PL-01-793 Warszawa Tel.: (+48) 22832 3465 Fax: (+48) 22832 3465 e-mail: [email protected] Bourdon-Haenni A/S Kastanjevägen 2 - Box 117 S-245 22 Staffanstorp Tel.: +46 (0) 4623 4470 Fax: +46 (0) 4623 4479 e-mail:[email protected] Ref. GUIDE.SEP 05/05 www.bourdon-haenni.com Chemical seal guide In the world of pressure measurement, the CHEMICAL SEAL has a predominant place. All severe, dangerous or hygienic processes require a CHEMICAL SEAL to be fitted between the process and the measuring instrument. Introduction Nowhere is this more true than in the petrochemical, pharmaceutical and food processing industries. This guide, covering the majority of cases, will assist you in choosing the right CHEMICAL SEAL for the safe and correct measurement of your process. Choose the right CHEMICAL SEAL... fit and forget ! Pages 1 to 4 GENERAL Page 5 DEFINITION OF A CHEMICAL SEAL Contents ◗ The various parts Pages 6 to 8 MAIN CHEMICAL SEAL RANGE ◗ Operating ranges ◗ Operating ranges of flanged chemical seals used with a pressure gauge of Ø ≥ 100mm Pages 9 to 23 COMPATIBILITY TABLES ◗ Information ◗ Minimum measuring ranges with pressure gauges ◗ With pressure switches ◗ With pressure transmitters ◗ With a "process" chemical seal Pages 24 to 27 APPLICATION NOTES ◗ Difference in elevation ◗ Level measurement ◗ Measurement error ◗ Measurement on oxygen circuits ◗ Measurement on chlorinated circuits ◗ Paint label products ◗ Accessories available ◗ Capillary length Pages 28 to 29 REGULATIONS, STANDARDS Page 30 INFORMATION CONCERNING CORROSION RESISTANCE General Transmission liquid What is a chemical seal? Industrial pressure measurement covers a very wide range of gases or liquids (fluids). The physical or chemical properties of these products sometimes make them incompatible for contact with the sensing elements of pressure gauges or transmitters. In such cases the measuring instrument (pressure gauge or transmitter) must be separated from the pressurised fluid by a system capable of transmitting the pressure to this instrument while isolating it from the fluid itself. This system is known as a chemical seal Top housing Diaphragm Bottom housing Pressurised fluid Pressure gauge fitted on chemical seal It consists basically of a flexible diaphragm, clamped or welded between two rigid housings. Pressure transmitter fitted on a chemical seal Page 1 General When is a chemical seal used? A chemical seal is used for pressure measurement in the following applications: 1- Viscous or turbid process fluids: These fluids could obstruct the measuring instrument (Bourdon tube or sensor). 2- Fluids that solidify at ambient temperature: These fluids could solidify in the measuring instrument. Example of a turbid fluid obstructing a pressure transmitter 3- Corrosive fluids: These could corrode the measuring instrument causing it to break. 4- Toxic fluids: In this case, the chemical seal forms an additional barrier between the fluid and the atmosphere. 5- Food and pharmaceutical liquids: The main problem in food-processing or pharmaceutical processes is to eliminate as much dead volume as possible. These volumes are inaccessible for cleaning and provide a site in which bacteria can develop. A Bourdon tube or sensor connection are examples of dead volumes. The solution is to fit either flush-diaphragm chemical seals with a food grade connection or in-line chemical seals that assist cleaning and sterilisation in place (CIP, SIP*). * CIP, or "cleaning in place", is a phase of the process consisting of a cyclic flushing of the facility with solvents which clean all the components and pipes without dismantling. SIP, or “sterilisation in place”, consists of a sterilising the complete facility by steam injection. Example showing contamination of a fluid by the previous fluid on a pressure transmitter when different fluids are processed on the same facility Page 2 General Which chemical seal? Diaphragm 1- Viscous or turbid fluids: Use a chemical seal mounted on a flange with suitably sized inlet port (DN) or flush-diaphragm chemical seal. 2- Fluids that solidify at ambient temperature: It is preferable to use a flanged or flush-diaphragm chemical seal. The chemical seal can be installed inside the heat insulation system so that the fluid itself is kept at the process temperature. It can also be installed outside the heat insulation system and kept at process temperature by a heating system (e.g. steam circulation). Viscous or turbid liquid Heat insulation Liquid at 80°C (bitumen) 3- Corrosive fluids: The corrosive power of a fluid depends on its nature, pressure, temperature and concentration. The material of the chemical seal parts wetted by the process fluid (bottom housing and diaphragm) must be compatible. Sometimes coatings need to be used. Page 3 General 4- Toxic fluids: The dimensions of diaphragms used by Bourdon-Haenni have been determined by extensive testing. Their low deformation strain rate guarantees long service life. In the unlikely event of a tube burst, the diaphragm is pushed against the body of the chemical seal, blocking any product leakage. After an incident of this kind, the chemical seal must be replaced. Pipe Dangerous fluid 5- Food and pharmaceutical fluids: For food and pharmaceutical fluids, Bourdon-Haenni has developed a very full range of flush-diaphragm chemical seals based on all the pressure connections used in these types of industry. Special attention is given to the surface condition of diaphragms and welds to ensure that they comply with FDA recommendations (see “Regulations and Standards” chapter) and prevailing standards. The surface roughness of diaphragms is usually Ra 0.8 (µm) maximum and as an option, Ra 0.4 (µm) maximum. The standard connections are fitted to pipes by welded tees which invariably contain a dead volume. To remedy this problem, Bourdon-Haenni has developed a range of in-line chemical seals which eliminate this dead volume. This type of chemical seal is especially suited to sensitive pharmaceutical processes and biotechnology industries. Diaphragm Transmission liquid Page 4 Compatibility with the measuring instrument: The first step in choosing your chemical seal is to check that it is compatible with your pressure measuring instrument (pressure gauge or transmitter). Each family of measuring instruments has a compatibility table. Use this table to check the compatibility of your device with the chosen chemical seal. Definition of a chemical seal Definition of the chemical seal: Define your chemical seal as described below. Top housing Diaphragm CHOICE CRITERIA Material Stainless steel or carbon steel Thread Choose a cylindrical GAS thread wherever possible Material Depends on the fluid to be measured and operating conditions Cleaning ring (optional) Material Material Bottom housing Process connection Customer choice Choice of filling liquid: According to temperature and application (see table) Ref Operating temperature Type of liquid Application LRS1 -15°C + 150°C Vaseline All standard devices Food and pharmaceutical applications CODEX and FDA approved LRS2 -60°C + 150°C Silicone Low temperature use LRS3 -20°C + 300°C Silicone High temperature use LRS4 -15°C + 150°C Fluorocarbon LRS5 -40°C + 150°C Silicone Low-viscosity fluid Reduction of response time for pipe > 2 metres Capsule pressure gauge LRS6 0°C + 370°C Silicone High temperature use for reinforced chemical seals LRS7 -20°C + 80°C Glycerine + water LRS8 -10°C + 200°C Silicone LRS9 -40°C + 400°C Silicone High temperature use Reduced response time Process measurement transmitters LRS10 -20°C + 225°C Vaseline FDA-approved high-pressure food use Any device used on an oxygen or chlorinated circuit (P max. 160 bar) "Paint label" use (not with vacuum) Use for vacuum and absolute pressure measurement Page 5 Main chemical seal range AR FAMILY TYPE PLASTIC D030 D001 SINGLE-PIECE D040 D041 D050 FLUSH-DIAPHRAGM THREADED CONNECTION D051 D052 D053 D054 D100 to D114 D108 / D109 - reinforced STANDARD D200 to D214 D208 / D209 - reinforced D300 to D314 D120-D121 WITH PROBE 1500/1510 D400 - Modular FLANGED D600 - Double-flange FLANGED D820 - Flush diaphragm D824 - Flush diaphragm Tantalum and Hastelloy D825 - Flush diaphragm Special material process face 1020 FLANGE + EXTENSION D850 WITH SENSOR D800 PROCESS D900 1650 - Mounting between DIN 2526 flanges INDUSTRIAL IN-LINE 1660 - Mounting between DIN 2512 flanges 1680 - Screw connection DIN 2353 version L 1690 - Plain connection DIN 2353 version L ASEPTIC APPLICATIONS DANC - Clamp ISO 2852 DADL / DADF - DIN 11851 FOOD INDUSTRY DAEL / DAEF - SMS 1145 DAVA - Varivent ® DAPH - DN38 3A 1005 - Homogeniser 1520 - SMS 1146 1530 - DIN 11887 FOOD INDUSTRY IN-LINE 1540 - ISO sterile 1620 - ISO 2852 1630 - ISO 2852 round diaphragm Page 6 Page 7 Always refer to the data sheet for the specifications Operating ranges DAxx DN25 DAxx DN 32 / 38 /40 DAxx DN50 / 51 DAVA DN25 DAVA DN40/125 DAPH 1005 D41x-D61x D618-D619 D42x-D62x D428 D435-D63x D820 DN15 D820 DN20 D820 DN25 D820 DN32 D820 DN40 D820-D824 DN50 D820-D824 DN80 D820-D824 DN100 1020 D850 DN50 D850 DN80 D850 DN100 D801-D804 DN50 D801-D804 DN80 D801-D804 DN100 DN d1"1/2 DN d 40 DN t 2" DN t 50 1500/1510 D030 D001 D040 D041 D050 D051 D052 D053 D054 D1xx D107 - D108 - D118 - D109 - D119 D2xx D207 - D208 - D218 - D209 - D219 D3xx D120-D121 TYPE -1 to 0 bar 0 +6 bar 0 +4 bar 0 +2.5 bar 0 +1.6 bar 0 +1 bar 0 +0.6 bar 0 +0.4 bar 0 +0.25 bar 0 +0.16 bar The minimum pressure depends on the device attached and operating temperature (see Pages 11 and 12) (1) Flanged chemical seals: maximum permissible pressure depends on the PN of the flange. (2) Measuring ranges given as a guide only due to the diversity models. Contact us. (3) DANC: maximum static pressure = 25 bar IN-LINE WITH SENSOR FLANGE + EXTENSION FLANGED FOOD INDUSTRY WITH PROBE STANDARD FLUSH-DIAPHRAGM SINGLE-PIECE PLASTIC FAMILY 0 +25 bar (1) 0 +40 bar (2) (2) (1) (1) (1) (1) (1) (1) (1) (3) (3) 0 +100 bar (1) 0 +160 bar (1) 0 +400 bar (1) (1) (1) (1) (1) (1) (1) (1) (1) 0 +1000 bar 0 +600 bar 0 +250 bar 0 +60 bar 0 +16 bar 0 +10 bar Page 8 A B A B For pressure levels beyond the minimum measuring ranges, the choice is made according to the PN. Pressure measurement of 0+60 bar Connection by ISO PN150 DN40 flange ⇒ Choice of chemical seal: D415/D611-D614 or D820 Example Pressure measurement of 0+2.5 bar Connection by ISO PN40 DN40 flange ⇒ Choice of chemical seal: D425 or D621 to D624 Example Examples of using the table: For the use of flanged chemical seals with other instruments, see compatibility tables Operating ranges of flanged chemical seals used with a pressure gauge of ∅ ≥ 100 mm 2" 50 4" 3" 0+0.6 0+1 0+1.6 0+4 0+6 D411 - D414 / D611 to 614 D621 to 624 / D421 - 424 D411 - D414 / D611 to 614 D820 / D824 / D825 D850 / D851 D801 - D804 D621 to 624 / D421 - 424 D411 - D414 / D611 to 614 D820 D820 / D824 / D825 D850 / D851 D801 - D804 D631 to 634 D631 to 634 D820 D415 / D611 to 614 D820 D415 / D611 to 614 D415 / D611 to 614 D415 / D611 to 614 (3) (3) (3) (3) (3) (3) 600 # PN100 D428 D428 D428 D428 300 # PN50 ISO PN (2) PN40 D411 - D414 / D611 to 614 D820 / D824 / D825 D850 - D851 D801 - D804 D820 D435 / D631 to 634 D621 to 624 / D421 - 424 PN25 D415 / D611 to 614 150 # PN20 D415 / D611 to 614 D820 PN16 D435 / D631 to 634 D621 to 624 / D421 - 424 D435 / D631 to 634 D425 / D621 to D624 D435 / D631 to 634 D425 / D621 to D624 D820 D435 / D631 to 634 D425 / D621 to D624 D435 / D631 to 634 D425 / D621 to D624 D435 / D631 to 634 D425 / D621 to D624 D435 / D631 to 634 D425 / D621 to D624 0+2.5 PN10 A 900 # PN150 B D618/619 D618/619 D618/619 D618/619 D618/619 D618/619 D618/619 D618/619 D618/619 D618/619 1500 # PN250 2500# PN420 Reinforced chemical seals (1) Min. measuring ranges given as guide only. Chemical seal mounted on a DN100 pressure gauge. (2) The measuring range of the pressure instrument is always less than or equal to the PN of the flange. -20°C ≤ Fluid temperature ≤ 100°C (3) D425 and D621 to D624: PN50 flange (class 300) permissible with max. operating pressure of 40 bar -10°C ≤ Température ambiante ≤ 50°C 100 80 2" 1/2 1" 1/2 40 65 1" 1/4 1" 25 32 3/4" 1/2" 15 20 3/8" 10 DN 0+0.16 0+0.4 Min. measuring range in bar (1) A Compatibility table Information - Measuring instrument fitted on chemical seal The volume of transmission liquid that the diaphragm can move is limited by its mechanical characteristics. V=V 0 For a pressure gauge, the volume of the Bourdon tube increases as greater pressure is applied (this is also the case for pressure sensors, but there is less volume variation). The movement of the chemical seal diaphragm must compensate for the volume variation of the Bourdon tube and the expansion variation of the transmission fluid. The suitability of a chemical seal for a measuring instrument must therefore be calculated according to: - The pressure to be measured - The volume absorbed by the measuring instrument - The dead volume of the measuring instrument - The length of the pipe between the chemical seal and the measuring instrument - The extreme ambient and fluid temperatures. P=0 V=V1 Tube travel The result of these calculations is given by the compatibility tables. There are compatibility tables for all Bourdon-Haenni product ranges: pressure gauges, pressure switches, pressure transmitters. These tables concern the most common applications. Please contact us for any other conditions. P=P1 Vt =V1 - V0 Page 9 Notes Page 10 Compatibility tables Minimum measuring ranges (in bar) with a pressure gauge GAUGE PRESSURE FLUID (T°C) PLASTIC SINGLE-PIECE Ø 40 - 50 - 63 Ø 80 - 100 -130- 150 - 160 * MIT - MAT - MMX - MEX and MEX35 MIT-MAT-MMD-DR-MEX-MIX-DRC-MPGMCX-MEP5 + Electrical contact pressure gauge -20 / +100 -40 / +150 -60 / +200 -20 / +100 -40 / +150 -60 / +200 AMBIENT (T°C) -10 / +50 -30 / +70 D030 0+2.5 (1) X -40/ +80 -10 / +50 -30 / +70 -40/ +80 X 0 +2.5 (1) X D001 0+2.5 X X X 0 +2.5 X X D040 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D041 0+10 0+16 0+16 0+16 0+25 0+40 D050 0+100 0+160 0+160 0+250 0+400 N/A FLUSH-DIAPHRAGM D051 WITH THREADED D052 CONNECTION D053 0+16 0+25 0+40 0+60 0+60 0+100 0+40 STANDARD 0+10 0+16 0+25 0+25 0+40 0+1.6 0+2.5 0+2.5 0+4 0+4 0+6 D054 0+1 0+1 0+1 0+1 0+1 0+1.6 D1xx 0+1 0+1 0+2.5 0+4 0+4 0+6 D2xx 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D3xx D120-D121 DAxx DN25 DAxx DN 32-38-40 DAxx DN50 - DN51 FOOD INDUSTRY WITH SENSOR WITH PROBE IN-LINE * DRC160. Contact us X = Not compatible 0+1 0+0.16 (2) 0+0.16 0+0.4 0+160 0+160 0+160 0+160 0+4 0+6 (3) X X X X 0+2.5 0+4 (3) X 0+6 0+10 (3) X 0+1 0+1.6 (3) X 0+1.6 0+2.5 (3) X 0+4 (3) X 0+6 0+10 (3) X DAVA DN40/125 0+1 0+1.6 (3) X 0+1.6 0+2.5 (3) X DAPH 0+4 0+6 (3) X X X X X X X 0+100 0+100 X D41x-D61x 0+1 0+1 0+2.5 0+4 0+4 0+6 D42x-D62x 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D435-D63x 0+1 0+1 0+1 0+0.16 (2) 0+0.16 0+0.4 D820 DN15 0+4 0+4 0+6 0+6 0+10 0+16 D820 DN20 0+1 0+1 0+2.5 0+4 0+4 0+6 D820 DN25 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D820 DN32 0+4 0+4 0+6 0+6 0+10 0+16 D820 DN40 0+1 0+1 0+2.5 0+4 0+4 0+6 D820-D824 DN50 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D820-D824 DN80 0+1 0+1 0+1 0+0.16 0+0.16 0+0.4 D820-D824 DN100 0+1 0+1 0+1 0+0.16 0+0.16 0+0.4 0+1.6 0+2.5 0+2.5 0+4 0+4 0+6 D850 DN50 0+1 0+1 0+2.5 0+4 0+4 0+6 D850 DN80 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D850 DN100 0+1 0+1 0+1 0.16 0+0.16 0+0.4 D801-D804 DN50 0+1 0+1 0+1 0+1 0+1.6 0+2.5 D801-D804 DN80 0+1 0+1 0+1 0+0.16 0+0.16 0+0.4 1020 FLANGE + EXTENSION 0+1 0+160 0+2.5 DAVA DN25 1005 FLANGED 0+1 0+160 D801-D804 DN100 0+1 0+1 0+1 0+0.16 0+0.16 0+0.4 1500/1510 0+10 0+16 0+16 0+16 0+25 0+40 0+1.6 (4) 0+2.5 (4) 0+4 0+6 0+1 (4) 0+1.6 (4) 0+2.5 0+4 DN d 1"1/2 DN d 40 DN t 2" DN t 50 (1) Fluid temperature 0°C < T < +80°C (2) 0+100 mbar. Possible on request (3) Fluid temperature -20°C < T < +150°C Ambient temperature -10°C < T < +70°C (4) Measuring ranges given for information only because of the diversity of models. Please contact us. Page 11 Compatibility tables Minimum measuring ranges (in bar) with a pressure gauge PLASTIC Vacuum and Pressure Absolute pressure Differential Pressure Ø 40-50-63-80-100-130-150-160* Ø 150 DR-DRC-MAT-MDA-MEX MIT-MIX-MMD-MMX-MPG-MEP5 MDX FLUID (T°C) -20 / +100 -20 / +150 -10 / +80 -30 / +120 AMBIENT (T°C) -10 / +50 -20 / +70 -10 / +50 -10 / +50 Maximum Static Pressure (1) in bar D030 X X X X X D001 -1+5 X X X X D040 X X X X X D041 X X X X X D050 X X X X X FLUSH-DIAPHRAGM D051 WITH THREADED D052 CONNECTION D053 X X X X X X X X X X X X X X X D054 X X X X X D100 à D114 -1+5 -1+9 0+16 X 100 D108/D109 reinforced -1+5 -1+9 0+16 X 100 D200 à D214 -1+3 -1+3 0+1 0+4 40 D208/D209 reinforced -1+3 -1+3 0+1 0+4 100 25 SINGLE-PIECE STANDARD D3xx FOOD INDUSTRY -1+0 & P abs -1 +0 & P abs 0+160 mbar 0+160 mbar D120-D121 X X X X X DAxx DN25 -1+3 (2) -1+5 (2) X X X DAxx DN 32-38-40 -1+3 (2) -1+5 (2) X X X DAxx DN50 - DN51 -1+1.5 (2) -1+3 (2) 0+4 X 40 (5) DAVA DN25 -1+3 (2) -1+5 (2) X X X -1+1.5 (2) -1+3 (2) 0+4 X 25 -1+3 (3) -1+5 (4) X X X X X X X X D41x-D61x -1+5 -1+9 0+16 X 100 (6) D618-D619 reinforced -1+5 -1+9 0+16 X 100 (6) D42x-D62x -1+3 -1+3 0+1 0+4 40 (6) D428 renforcé -1+3 -1+3 0+1 0+4 100 (6) D435-D63x -1+0 & P abs -1+0 & P abs 0+160 mbar 0+160 mbar 25 (6) D820 DN15 -1+9 -1+9 X X 40 (6) D820 DN20 -1+5 -1+9 0+4 X 40 (6) D820 DN25 -1+3 -1+3 0+1 0+4 40 (6) D820 DN32 -1+9 -1+9 X X 100 (6) D820 DN40 -1+5 -1+9 0+4 X 100 (6) D820-D824 DN50 -1+3 -1+3 0+1 0+4 100 (6) D820-D824 DN80 -1+0 & P abs -1+0 & P abs 0+160 mbar 0+160 mbar 100 (6) D820-D824 DN100 -1+0 & P abs -1+0 & P abs 0+160 mbar 0+160 mbar 100 (6) D850 DN50 -1+5 -1+9 0+4 X 50 (6) D850 DN80 -1+3 -1+3 0+1 0+4 50 (6) D850 DN100 -1+0 & P abs -1+0 & P abs 0 +160 mbar 0+160 mbar 50 (6) D801 DN50 -1+3 -1+3 0+1 0+4 100 (6) D801 DN80 -1+0 & P abs -1+0 & P abs 0 +160 mbar 0+160 mbar 100 (6) D801 DN100 -1+0 & P abs -1+0 & P abs 0 +160 mbar 0+160 mbar 100 (6) X X X X DAVA DN40/125 DAPH 1005 FLANGED FLANGE + EXTENSION WITH SENSOR WITH PROBE IN-LINE 1500/1510 DN d 1"1/2 DN d 40 DN t 2" DN t 50 * DRC160. Contact us X = Not compatible (1) The maximum pressure depends on the pressure gauge measuring range (2) Minimum measuring range on pressure gauge DN ≤ 63 and MEX35. Pressure gauges DN ≥ 100 : see data sheet for food industry chemical seals CONTACT US (3) Only pressure gauges DN ≤ 63 and MEX35 / -10°C < Fluid temperature < +100°C. (4) Only pressure gauges DN ≤ 63 and MEX35 / -10°C < Fluid temperature < +150°C. (5) DANC: maximum static pressure = 25 bar. (6) Depending on PN of the flange Page 12 Page 13 1005 DAPH DAVA DN40/125 DAVA DN25 DAxx DN50 - DN51 DAxx DN32-38-40 DAxx DN25 D120-D121 D3xx D207-D208-D209 D218-D219 D2xx D107-D108-D109 D118-D119 D1xx D054 D053 D052 D051 D050 D041 D040 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S 0.1 25 Scale (bar) Overpressure (bar) D001 41 0 to 1 50 CODE 43 0.16 25 0.25 25 0 to 1.6 0 to 2.5 50 50 42 0.4 40 0.4 50 0.4 16 0 to 4 50 44 0.6 40 0.6 50 0.6 16 0 to 6 50 45 1 25 1 40 (1) 1 40 1 50 1 40 1 16 0 to 10 50 46 0.4 100 0 to 4 100 51 Limit of use of pressure switches between minimum setting pressure and 90% full scale Fluid temperature between -40°C and +150°C Ambient temperature between -25°C and +70°C 52 0.6 100 1.6 100 0 to 6 100 53 1 40 (1) 1 40 (1) 1 100 1.6 100 1 40 0 to 10 100 54 1.6 40 (1) 1.6 40 (1) 1.6 40 1.6 100 1.6 100 1.6 40 1.6 100 1.6 16 0 to 16 100 2.5 40 (1) 2.5 40 (1) 2.5 40 2.5 100 2.5 100 2.5 40 2.5 100 0 to 25 100 55 4 40 (1) 4 40 (1) 4 40 4 100 4 100 4 40 4 100 0 to 40 100 56 1.6 160 0 to 10 200 61 1.6 160 1.6 200 1.6 160 0 to 16 200 62 P = Minimum setting pressure S = Maximum overpressure Compatibility with a pressure switch - RP2N/RP2Y/RP2E Compatibility tables 63 2.5 160 2.5 200 2.5 160 0 to 25 200 64 4 160 4 200 4 160 0 to 40 200 65 66 6 160 6 200 6 160 10 160 10 200 10 160 10 160 10 200 0 to 60 0 to 100 200 200 Page 14 0.1 50 (2) 0.1 50 (2) 0.1 50 (2) 0.1 50 (2) 0.1 25 (2) 42 43 0.16 50 (2) 0.16 50 (2) 0.16 50 (2) 0.16 50 (2) 0.16 25 (2) 0.25 50 (2) 0.25 50 (2) 0.25 50 (2) 0.25 50 (2) 0.25 25 (2) 0 to 1.6 0 to 2.5 50 50 44 0.4 50 (2) 0.4 50 (2) 0.4 50 (2) 0.4 50 (2) 0.4 50 (2) 0.4 50 (2) 0.4 50 (2) 0.4 40 (2) 0.4 50 (2) 0 to 4 50 45 0.6 50 (2) 0.6 50 (2) 0.6 50 (2) 0.6 50 (2) 0.6 50 (2) 0.6 50 (2) 0.6 50 (2) 0.6 40 (2) 0.6 50 (2) 0 to 6 50 46 1 50 (2) 1 50 (2) 1 50 (2) 1 50 (2) 1 50 (2) 1 50 (2) 1 50 (2) 1 40 (2) 1 50 (2) 0 to 10 50 51 0.4 100 (2) 0.4 100 (2) 0.4 100 (2) 0.4 100 (2) 0.4 100 (2) 0.4 100 (2) 0 to 4 100 52 0.6 100 (2) 0.6 100 (2) 0.6 100 (2) 0.6 100 (2) 0.6 100 (2) 0.6 100 (2) 0 to 6 100 53 54 1.6 100 (2) 1.6 100 (2) 1.6 100 (2) 1.6 50 (2) 1.6 50 (2) 1.6 50 (2) 1.6 100 (2) 1.6 100 (2) 1.6 100 (2) 1.6 40 (2) 1.6 100 (2) 0 to 16 100 1.6 100 (2) Contact us 1 100 (2) 1 100 (2) 1 100 (2) 1 100 (2) 1 100 (2) 1 100 (2) 0 to 10 100 Example: D820 ISO PN50 DN40 mounted on RP2N code 54. Overpressure = 50 bar (instead of 100 bar). (1) DANC - Maximum static pressure = 25 bar (2) Flanged chemical seals : The permissible overpressure depends on the PN of the flange and must be ≤ the indicated value. IN-LINE D801 / D804 DN100 D801 / D804 DN80 D801 / D804 DN50 D850 / D851 DN100 D850 / D851 DN80 D850 / D851 DN50 D820 DN15 - DN32 D820 DN20 - DN40 D820 DN25 D820 / D824 DN50 D820 / D824 DN80 - DN100 D435-D63x D428 D42x-D62x D618 D619 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S Scale (bar) Overpressure (bar) D41x-D61x 41 0 to 1 50 CODE Limit of use of pressure switches between minimum setting pressure and 90% of full scale Fluid temperature between -40°C and +150°C Ambient temperature between -25°C and +70°C 2.5 100 (2) 2.5 100 (2) 2.5 100 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 100 (2) 2.5 100 (2) 2.5 100 (2) 2.5 40 (2) 2.5 100 (2) 0 to 25 100 2.5 100 (2) 55 4 100 (2) 4 100 (2) 4 100 (2) 4 50 (2) 4 50 (2) 4 50 (2) 4 100 (2) 4 100 (2) 4 100 (2) 4 40 (2) 4 100 (2) 0 to 40 100 4 100 (2) 56 1 200 (2) 1 200 (2) 1 200 (2) 1 200 (2) 1 200 (2) 0 to 10 200 61 1.6 200 (2) 1.6 200 (2) 1.6 200 (2) 1.6 200 (2) 1.6 200 (2) 1.6 200 (2) 0 to 16 200 1.6 160 (2) 1.6 200 (2) 62 Compatibility with a pressure switch - RP2N/RP2Y/RP2E - cont. 63 2.5 200 (2) 2.5 200 (2) 2.5 200 (2) 2.5 200 (2) 2.5 200 (2) 2.5 200 (2) 0 to 25 200 2.5 160 (2) 2.5 200 (2) 64 4 200 (2) 4 200 (2) 4 200 (2) 4 200 (2) 4 200 (2) 4 200 (2) 0 to 40 200 4 160 (2) 4 200 (2) 65 66 6 200 (2) 6 200 (2) 6 200 (2) 6 200 (2) 6 200 (2) 6 200 (2) 10 200 (2) 10 200 (2) 10 200 (2) 10 200 (2) 10 200 (2) 10 200 (2) 0 to 60 0 to 100 200 200 6 10 160 (2) 160 (2) 6 10 200 (2) 200 (2) Page 15 1005 DAPH DAVA DN40/125 DAVA DN25 DAxx DN50 - DN51 DAxx DN 32-38-40 DAxx DN25 D120-D121 D3xx D207-D208-D209 D218-D219 D2xx D107-D108-D109 D118-D119 D1xx D054 D053 D052 D051 D050 D041 D040 D001 D030 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S 200 -1 to 0 1.5 CODE Scale (bar) Overpressure (bar) 202 203 204 205 206 -0.6 7 1.5 15/25 1.5 15/30 (1) 1.5 15/30 5.5 25 5.5 30 5.5 30 5.5 30 9.5 65 9.5 65 208 209 600 601 602 14.5 160 14.5 220 33 160 33 220 -0.5 15 40 800 40 400 62 800 114 800 5 to 100 20 to 150 -1 to 3.5 25 to 17530 to 35060 to 600 220 220 15 800 800 800 207 P = Minimum setting pressure S = Maximum overpressure -1 to 2.5 0 to 0.2 0.05 to 1 0.5 to 10 3.5 to 25 5 to 50 7 1.5 1.5 15 (30 RPPN) 30 65 201 Limit of use of pressure switches between minimum setting pressure and 90% full scale Fluid temperature between -40°C and +150°C Ambient temperature between -25°C and +70°C Compatibility with a pressure switch - RPPA/RPPN Compatibility tables Page 16 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S 201 202 203 204 205 206 -0.6 7 -0.6 7 -0.6 7 -0.6 7 -0.6 7 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 1.5 15/30 (2) 9.5 65 (2) 9.5 65 (2) 9.5 65 (2) 9.5 50 (2) 9.5 50 (2) 9.5 50 (2) 9.5 65 (2) 9.5 65 (2) 9.5 65 (2) Contact us 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) 5.5 30 (2) -1 to 2.5 0 to 0.2 0.05 to 1 0.5 to 10 3.5 to 25 5 to 50 7 1.5 1.5 15 (30 RPPN) 30 65 5.5 9.5 30 (2) 65 (2) (1) DANC - Maximum static pressure = 25 bar (2) Flanged chemical seals : The permissible overpressure depends on the PN of the flange and must be ≤ the indicated value. Example: D611 ISO PN50 DN40 mounted on RPPA code 206. Overpressure = 50 bar (instead of 65 bar). IN-LINE 1500/1510 D801 / D804 DN100 D801 / D804 DN80 D801 / D804 DN50 D850 / D851 DN100 D850 / D851 DN80 D850 / D851 DN50 D820 DN15 - DN32 D820 DN20 - DN40 D820 DN25 D820 / D824 DN50 D820 / D824 DN80 - DN100 D435-D63x D428 D42x-D62x D618 D619 D41x-D61x 200 -1 to 0 1.5 CODE Scale (bar) Overpressure (bar) Limit of use of pressure switches between minimum setting pressure and 90% of full scale Fluid temperature between -40°C and +150°C Ambient temperature between -25°C and +70°C 208 209 600 601 602 14.5 220 (2) 14.5 220 (2) 14.5 220 (2) 14.5 220 (2) 14.5 220 (2) 14.5 220 (2) 33 220 (2) 33 220 (2) 33 220 (2) 33 220 (2) 33 220 (2) 33 220 (2) -0.5 15 (2) -0.5 15 (2) -0.5 15 (2) -0.5 15 (2) -0.5 15 (2) 5 to 100 20 to 150 -1 to 3.5 25 to 17530 to 35060 to 600 220 220 15 800 800 800 14.5 33 160 (2) 160 (2) 14.5 33 220 (2) 220 (2) 207 Compatibility with a pressure switch - RPPA/RPPN - cont. Page 17 (1) DANC - Maximum static pressure = 25 bar DAxx DN50 - DN51 DAxx DN 32-38-40 DAxx DN25 D120-D121 D3xx D207-D208-D209 D218-D219 D2xx D107-D108-D109 D118-D119 D1xx D041 D040 1.45 40 (1) P S S P S P S P 25 50 S S 1.45 P 0.4 40 P 1.45 S 40 (1) 5.6 100 5.6 40 100 9.5 200 S P 14.5 P 5.6 S 160 14.5 5.6 100 P 100 200 200 5 to 100 207 RPPX 14.5 9.5 100 5 to 50 206 RPPX S 16 100 3.5 to 25 205 RPPX 200 33 160 33 200 33 200 20 to 150 208 RPPX P = Minimum setting pressure S = Maximum overpressure P 1.45 S 50 0.5 to 10 204 RPPX P S 80 Overpressure (bar) D001 -1 to 2.5 Scale (bar) P 201 CODE RPPC Limit of use of pressure switches between minimum setting pressure and 90% full scale Fluid temperature between -40°C and +150°C Compatibility with a pressure switch - RPPC/RPPX Compatibility tables 50 0.6 40 0.6 50 0.2 to 4 210 RPPX Page 18 2.35 15/25 S 25 S S P S P 1.72 P S P 1.72 30 (1) P S P S P 2.35 25 2.35 40 (1) 3.35 25 3.35 40 (1) 600 15/25 100 5.25 25.5 15/25 100 4.25 400 25.5 600 15 to 120 651 S 7 S 65 3.35 40 3.35 220 5.25 160 5.25 220 2.5 to 30 258 P 0.15 P 0.55 40 65 30 S 30 2.35 15/30 S P 0.55 220 S P 4.25 160 4.25 220 2.5 to 20 257 P 65 65 1.5 to 20 256 3.35 1.72 16 2.35 65 1.5 to 10 246 S 1.12 16 1.72 30 0.8 to 10 245 P = Minimum setting pressure S = Maximum overpressure P S P 16 30 0.8 to 4 235 1.12 15 (30 RDPN) 0.1 to 4 234 S 0.23 15 (30 RDPN) 0.18 0.15 to 1 15 (30 RDPN) 224 0.15 to 0.5 214 P S (1) DANC - Maximum static pressure = 25 bar DAVA DN40/125 DAVA DN40/125 DAVA DN40/125 DAVA DN25 DAxx DN50 - DN51 DAxx DN 32-38-40 DAxx DN25 D120-D121 D3xx D207-D208-D209 D218-D219 D2xx D107-D108-D109 D118-D119 D1xx D041 D040 D001 7 P 0.05 to 1 0.05 to 0.5 Scale (bar) Overpressure (bar) 7 221 211 CODE Limit of use of pressure switches between minimum setting pressure and 90% full scale Fluid temperature between -40°C and +150°C Ambient temperature between -25°C and +70°C Compatibility with a pressure switch - RDDP/RDPN Compatibility tables Page 19 1005 DAPH DAVA DN40/125 DAVA DN25 DAxx DN50 - DN51 Daxx DN 32-38-40 DAxx DN25 D120-D121 D3xx D207-D208-D209 D218-D219 D2xx D107-D108-D109 D118-D119 D1xx D054 D053 D052 D051 D050 D041 D040 D001 S P S 0.1 3 0.1 3 3 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P Overpressure (bar) D030 0 +1 Scale (bar) 0.25 4 0.25 4 0.25 4 0.25 4 4 0 +2.5 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 8 0+4 0.6 12 0.6 12 0.6 12 0.6 12 0.6 12 0.6 12 12 0+6 1 20 1 20 1 20 1 20 1 20 1 20 1 20 1 20 20 0 + 10 0.6 32 (1) 1.6 32 (1) 1.6 25 1.6 25 1.6 25 1.6 32 1.6 32 1.6 32 1.6 32 32 0 + 16 Chemical seals mounted on TED without compensation after mounting and filling 2.5 40 (1) 2.5 40 (1) 2.5 40 (1) 2.5 25 2.5 25 2.5 40 2.5 50 2.5 25 2.5 50 2.5 40 2.5 50 50 0 + 25 4 40 (1) 4 40 (1) 4 40 (1) 4 25 4 25 4 40 4 80 4 80 4 40 4 80 80 6 100 6 120 6 120 120 0 + 60 10 100 10 160 10 200 10 160 200 25 500 25 400 500 40 600 40 400 600 0 + 100 0 + 250 0 + 400 P = Minimum setting pressure S = Maximum overpressure 0 + 40 Compatibility with a pressure switch - TED50-TED60-YTED Compatibility tables Page 20 0.1 3 0.1 3 0.1 3 0.1 3 0.1 3 0.1 3 0.1 3 0.1 3 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 0.25 4 4 0.25 4 0 +2.5 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 0.4 8 8 0.4 8 0+4 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 0.6 12 (2) 12 0.6 12 (2) 0+6 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 1 20 (2) 20 1 20 (2) 0 + 10 2.5 40 (2) 2.5 50 (2) 2.5 25 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 2.5 50 (2) 50 2.5 50 (2) 0 + 25 Contact us 1.6 25 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 1.6 32 (2) 32 1.6 32 (2) 0 + 16 4 80 (2) 4 80 (2) 4 80 (2) 4 80 (2) 4 80 (2) 4 80 (2) 4 40 (2) 4 80 (2) 80 4 80 (2) 0 + 40 (1) DANC - Maximum static pressure = 25 bar (2) Flanged chemical seals : The permissible overpressure depends on the PN of the flange and must be ≤ the indicated value. Example: D820 ISO PN20 DN50 mounted on TED50 0+16 bar. Overpressure = 20 bar (instead of 32 bar). IN-LINE 1500/1510 D801 / D804 DN100 D801 / D804 DN80 D801 / D804 DN50 D850 / D851 DN100 D850 / D851 DN80 D850 / D851 DN50 D820 DN20 - DN40 D820 DN25 D820 / D824 DN50 D820 / D824 DN80 - DN100 D435-D63x D428 D42x-D62x D618 D619 0.1 3 3 P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S P S Overpressure (bar) D41x-D61x 0 +1 Scale (bar) 0 + 100 0 + 250 0 + 400 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 25 40 120 (2) 200 (2) 500 (2) 500 (2) 6 10 100 (2) 100 (2) 120 200 500 600 6 10 120 (2) 160 (2) 10 25 40 200 (2) 400 (2) 400 (2) 0 + 60 Compatibility with a pressure switch - TED50-TED60-YTED - cont. Page 21 (1) Flanged chemical seals: maximum permissible pressure depends on the PN of the flange. (2) Measuring ranges given as a guide only due to the diversity of models. Contact us. (3) DANC: maximum static pressure = 25 bar IN-LINE WITH SENSOR FLANGE + EXTENSION FLANGED FOOD INDUSTRY WITH PROBE STANDARD FLUSH-DIAPHRAGM SINGLE-PIECE PLASTIC FAMILY DN d 1"1/2 DN d 40 DN t 2" DN t 50 D801-D804 DN50 D801-D804 DN80 D801-D804 DN100 DAxx DN25 DAxx DN 32 / 38 /40 DAxx DN50 / 51 DAVA DN25 DAVA DN40/125 DAPH 1005 D41x-D61x D618 -D619 D42x-D62x D428 D435-D63x D820 DN15 D820 DN20 D820 DN25 D820 DN40 D820-D824 DN50 D820-D824 DN80 D820-D824 DN100 1020 D850 DN50 D850 DN80 D850 DN100 1500/1510 D030 D001 D040 D041 D050 D051 D052 D053 D054 D1xx D107-D108-D118-D109-D119 D2xx D207-D208-D218-D209-D219 D3xx D120-D121 TYPE 0 +16 bar 0 +10 bar CONTACT US NOT APPLICABLE NOT APPLICABLE SEE E920 - Y920 NOT APPLICABLE 0 +6 bar 0 +4 bar 0 +2.5 bar 0 +1.6 bar 0 +1 bar 0 +0.6 bar 0 +0.4 bar 0 +0.25 bar 0 +0.16 bar Chemical seals mounted on E91x - Y91x - X91x without compensation after mounting and filling 0 +25 bar (1) 0 +40 bar (2) (1) (1) (1) (1) (1) (1) (1) (3) (3) 0 +60 bar Compatibility with a pressure transmitter E91x - Y91x - X91x Compatibility tables 0 +100 bar (1) 0 +160 bar (1) 0 +400 bar (1) (1) (1) (1) (1) (1) (1) (1) 0 +600 bar 0 +250 bar Page 22 (1) Flanged chemical seals: maximum permissible pressure depends on the PN of the flange. (2) Measuring ranges given as a guide only due to the diversity of models. Contact us. (3) DANC: maximum static pressure = 25 bar IN-LINE WITH SENSOR FLANGE + EXTENSION FLANGED FOOD INDUSTRY WITH PROBE STANDARD FLUSH-DIAPHRAGM SINGLE-PIECE PLASTIC FAMILY 0 +2.5 bar 0 +1.6 bar 0 +0.16 bar -1 to 0 bar DN d 1"1/2 DN d 40 DN t 2" DN t 50 CONTACT US NOT APPLICABLE NOT APPLICABLE NOT APPLICABLE 0 +0.25 bar NOT APPLICABLE 0 +0.4 bar DAxx DN25 DAxx DN 32 / 38 /40 DAxx DN50 / 51 DAVA DN25 DAVA DN40/125 DAPH 1005 D41x-D61x D618 -D619 D42x-D62x D428 D435-D63x D820 DN15 D820 DN20 D820 DN25 D820 DN40 D820-D824 DN50 D820-D824 DN80 D820-D824 DN100 1020 D850 DN50 D850 DN80 D850 DN100 D801-D804 DN50 D801-D804 DN80 D801-D804 DN100 NOT APPLICABLE NOT APPLICABLE NOT APPLICABLE NOT APPLICABLE NOT APPLICABLE NOT APPLICABLE 0 +4 bar 1500/1510 D030 D001 D040 D041 D050 D051 D052 D053 D054 D1xx D107-D108-D118-D109-D119 D2xx D207-D208-D218-D209-D219 D3xx D120-D121 TYPE 0 +0.6 bar Chemical seals mounted on ED701 without compensation after mounting and filling 0 +1 bar Compatibility with a pressure transmitter ED701 Compatibility tables 0 +25 bar (2) (1) (1) (1) (1) (1) (1) (1) (1) (3) (3) 0 +40 bar 0 +16 bar 0 +10 bar 0 +6 bar Compatibility with a «Process» chemical seal To meet the needs of the chemical and petrochemical industries Bourdon-Haenni has developed the D900 chemical seal range. These chemical seals for corrosive or viscous fluids provide enhanced performance, especially at high temperatures. These chemical seals can be fitted on the following BourdonHaenni products: EDD575, Flexbar. Our know-how and experience enable us to equip «process» pressure transmitters for other manufacturers such as ABB, EPM, Foxboro, Honeywell, etc. Please contact us for details with your requirements. Page 23 Application notes Difference in elevation If the chemical seal is not installed at the same height as the pressure measuring instrument (with the two devices separated by a connecting capillary), the pressure indicated by the instrument must be corrected by the pressure value corresponding to the height of the liquid column in the capillary. 1- Measuring instrument installed below the chemical seal: A negative correction must be made. 2- Measuring instrument installed above the chemical seal: A positive correction must be made. Note: Due to the vacuum created by the column height, a measuring instrument must never be installed more than 6 metres above the chemical seal (limited to 4 metres for the LRS4). Pressure gauge installed above the chemical seal Applications with differential pressure gauges Pressure gauge installed below the tank Pressure gauge installed above the tank Pressure gauge installed between the two chemical seals Page 24 Application notes Application example Level measurement in a closed horizontal cylindrical tank To measure the liquid level in a closed tank with gaseous atmosphere. The photo below shows a differential transmitter equipped with two D902 chemical seals with polyethylene-sheathed stainless steel capillaries. Chemical seals Differential pressure transmitter P1 H P2 P2-P1 = ∆P = ρ . g . H ∆P = Pα ρ = Κg/m3 g = m/s2 H=m D902 chemical seal Differential pressure transmitter Capillary Page 25 Application notes Measurement error Measurement error introduced by a chemical seal Our chemical seals are designed not to introduce measurement error. The stiffness (Km) of the diaphragms used is a low as possible compared to the stiffness of the measuring instrument. Stiffness is characterised by the ratio Km: Km= ∆V ∆P Where: ∆V: Displaced volume in cm3 ∆P: Pressure difference in mbar. ∆P Generally, fitting a chemical seal introduces no additional error at 20°C on the measuring instrument to which it is fitted. Measurement on an oxygen circuit Chemical seals designed to operate with oxygen undergo a special cleaning procedure. The transmission fluid used is a fluorocarbon (LRS4 - Max. P. 1-0 bar at 60°C) which does not react in contact with oxygen. This guarantees the safety of the device if there is an accidental diaphragm failure. Measurement on a chlorinated circuit Chemical seals designed for use with chlorinated products are also filled with LRS4 transmission fluid, which is also non-reactive in contact with chlorine. Paint label Instruments used on paint lines (especially in the automotive industry) must be totally free of silicone-based products and any fatty products. LRS7 filling liquid is used for this application. Pressure limiter It is possible to fit a pressure limiter between the chemical seal and the measuring instrument in the following cases: AORPB : with families D300, D435, D631 (min. pressure 1.6 bar) and D820 (DN80) ambient temperature range -10 ...+80°C AORP : with families D200, D421, D621 (min. pressure 4 bar) and D820 (DN ≥ 50) ambient temperature range -10 ...+80°C with families D100, D411, D611 (min. pressure 10 bar) and D820 (DN ≥ 40) ambient temperature range -10 ...+80°C Please contact us for other cases Damping connection, Valve It is FORBIDDEN to fit a damping connection or valve between the chemical seal and the measuring instrument. Page 26 Application notes Capillary length The use of capillaries with a chemical seal results in changes to the pressure transmission characteristics and requires certain precautions. Response time Definition: With the chemical seal subjected to constant pressure P, the response time is defined as the time t, in seconds, required for the pressure measuring instrument mounted on the chemical seal to indicate pressure P’. Pressure P t P’ P: pressure applied to the chemical seal P': pressure indicated by the instrument t0 The response time of the assembly depends on: t0 +t - the length and diameter of the capillary, - the transmission fluid used, - the temperature, - the pressure, - the displaced volume. Precautions during use The capillary must be installed in a manner that prevents it from vibrating. There must be no tight bends on the capillary. To keep the effects of temperature as low as possible in differential pressure measuring systems, the two capillaries must be mounted in a way that ensures they are influenced in an identical manner by the ambient temperature. Page 27 Regulations Standards Standards for the food, pharmaceutical and biotechnology industries Special requirements: food processing, pharmaceutical and biotechnology processes are subject to special hygienic design rules recommended by the FDA. The general mission of the American Food and Drug Administration is to protect public health in the USA through the following actions: 1. Clinical research, scheduling and monitoring the marketing of human and veterinary drugs, cosmetics and food products. 2. Checking that these products are correctly marked, effective and safe. 3. Participating throughout the world in the harmonisation of regulations concerning these products. Paragraphs 1, 2 and 3 are enforced under the aegis of the General Secretary of the FDA after consulting experts in science, medicine and public health and in co-operation with associations representing consumers, manufacturers, importers, packagers and distributors of these products. The FDA’s activities include publishing the "GMP" or "Good Manufacturing Process" rules which represent sound engineering practice in the construction of food processing and pharmaceutical processes. The FDA does not issue certificates for items used in the construction of these processes but does conduct regular audits and inspections of these factories*. The instruments manufactured by Bourdon-Haenni for these applications must therefore comply with the rules published by the FDA. * Factories located anywhere in the world manufacturing products intended for the American market. "3A sanitary" is the best-known rule in the USA in relation to the hygiene of food processing facility design, especially for dairy and egg products. Parts in contact with the product are manufactured from FDA-approved materials. "3A sanitary" also includes the GMPs, representing sound engineering practice in the construction of food processes, especially concerning the maximum surface roughness (Ra). 3A issues certificates and permission to use the 3A symbol after auditing the design and the company’s Quality Assurance system. Page 28 Regulations Standards Enforcement of directives ◊ Pressure Equipment Directive 97/23/CE • Our standard equipment of volume ≤ 1 litre and pressure ≤ 200 bar, or DN ≤ 25 all pressure ratings, or components of pressure equipment, is designed and manufactured in compliance with Article 3.3 of 97/23/CE = Sound engineering practice. • For pressure gauges and transmitters of V ≤ 0.1 litre and P > 200 bar, Category I : compliance with the essential safety requirements of the directive (design, mechanical strength, materials, welded assemblies, safety coefficient, etc.): CE marking. • For equipment of V > 0.1 litre and P > 200 bar or for use with unstable gas, Category III : compliance with the essential safety requirements, evaluation by notified organisation: CE 0062 (No. of the Bureau Véritas) E.g.: D904 PN250 ◊ Explosive Atmosphere Directive ATEX 94/9/CE • Electrical measuring instruments used in an explosive atmosphere must bear the type certificate number of the notified organisation issuing it and the specific marking for protection against explosions followed by the symbol of the instrument group and the category E.g.: LCIE 03 ATEX 6125X CE0081 (No. of the Notified Organisation) II 2 G / D followed by the protection mode: EEx dIIC T6 / T5 • For mechanical measuring instruments there are 2 categories: - Category of equipment with moving parts warranting evaluation of the ignition risk (EN13 463-1). Example: Pressure gauges (with no plastic component of surface area > 20 cm2 ) Marking CE II 2 G/D - IM2 - Category of equipment that does not have its own potential source of ignition. Example: Metallic chemical seals, connections, siphons, accessories. These have no specific ATEX marking. Page 29 Information concerning corrosion resistance The choice of material for the diaphragm and bottom housing is determined primarily by the corrosiveness of the fluid to be measured. Corrosion also depends on the surface conditions of parts in contact with the fluid to be measured, the presence of air (and therefore oxygen) dissolved in the fluid or corrosion catalysts or inhibitors. The table below provides general compatibility indications. Given the complexity of corrosion phenomena, it is essential to have the suitability of the chosen material validated (influence of temperature, concentration, pressure, shape of the parts, etc.). These choices are the user’s responsibility. MATERIALS To be given preference in the PRESENCE OF: Not to be used in the PRESENCE OF: STAINLESS STEEL 1.4404 (AISI 316 L) 1.4435 (AISI 316 L) 1.4571 (316 Ti) - Strong and weak acids (T < 100°C) except mineral acids - Weak or strong alkalis (T < 100°C) - Acidic, neutral or alkaline salts (T < 100°C) - Sea water (T < 100°C) - Oxidising media - Hydrogen - Hydrochloric and sulphuric acid - Ferric chloride - Fluorine and fluorides - Damp chlorine - Concentrated nitric acid at high temperature - Oxalic and chromic acid MONEL 400 2.4360 - Hydrogen sulphide (dry) (frequently present in petroleum products) - Sea water - Neutral and alkaline salts - Hydrofluoric acid - Strongly oxidising acids (nitric acid) HASTELLOY B2 2.4617 - Excellent resistance to corrosion and concentrated hydrochloric, sulphuric and acetic acid at high temperature - Copper and iron chloride HASTELLOY C276 2.4819 - Concentrated sulphuric acid at high temperature - Damp chlorine - Sea water - Brine - Copper salt - Strong oxidising agents - Household waste incineration gases URANUS B6 1.4539 - Hot sulphuric acid (<40%) - Hot concentrated nitric acid - Ammonium sulphate - Viscose - Cellulose acetate - Sea water TITANIUM - Organic media - Acetic acid - Citric acid - Sea water - Chlorine in aqueous solution - Acidic medium (hydrochloric and sulphuric acid) - Strongly oxidising acidic medium (hot nitric acid) - Concentrated alkaline medium - Hydrofluoric acid and fluorides TANTALUM - Most corrosive agents - Chlorine - Hydrofluoric acid - Hot concentrated sulphuric acid - Ammonia PTFE Coating th. 0.02 mm - Abrasive or adhesive fluid - The material of the housing and/or diaphragm must be resistant to the medium. The 0.02-mm coating cannot guarantee protection against corrosion. Diaphragm lining th. 0.25 mm - Corrosive, abrasive, adhesive medium - Vacuum and Absolute Pressure Housing lining th. 2 mm - Corrosive, abrasive, adhesive medium P > 10 bar - T > 100°C Female connection, taper pipe thread Page 30 Design and page setting: josette aubry - gérard demeulenaere - corinne foussard - patrick l'henaff - michel saussereau - jean-jacques vaslin Notes
