valve technologies fluid control components

VALVE TECHNOLOGIES
FLUID CONTROL COMPONENTS
Innovation Inside
SCHRADER INTERNATIONAL is the worldwide leader in valves and sensing technology.
Schrader means fluid control for air, nitrogen, air-conditioning gas, water, fuels, oils...
and for all other fluids.
Schrader designs and produces highly engineered valves: charging valves, high
pressure relief valves, burst valves, pressure regulators and safety connectors for
many applications: Automotive, Truck & Bus, Heavy Duty/Off Road, Aeronautics, Energy,
Industrial/Manufacturing & plant equipment...
Schrader has a worldwide footprint: leading design, engineering, manufacturing and
customer support on 4 continents:
Schrader Manufacturing Facilities
Sales & Engineering Support Centers
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RESEARCH AND DEVELOPMENT, LABORATORY AND INNOVATION GROUP
Custom Engineering and Design for fluid control valves and sensing technology
‘‘We Can Design, Prototype and Manufacture That For You’’
Concept, design, prototyping and manufacturing
services for valves & sensing applications
A team of experts in flow analysis, FEA, materials
(Metal, Rubber and Plastic...), electronical and valves
design ready for your fluid control systems needs.
Risk assessments during the development project:
functional analysis, DFMEA, APQP, DVP...
Specialists in diverse segments such as heavy-duty,
automotive, aeronautic and industrial application.
CORE DESIGN COMPETENCIES INCLUDE:
3D Solid Modeling: Catia, Inventor
Flow Analysis: CFDesign
Vibration Testing
Pressure and leak Testing
Pressure cycling
Helium leak testing
High-Speed Spin Chambers
Finite Elements Analysis
Thermal chamber testing
Flow testing
Vacuum testing
Ozone Testing
Salt Spray
Pollution (weight and size) testing
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FILLING AND PURGE VALVES
Gasoline engine applications
Schrader specializes in developing and producing high-quality gasoline
engine purge valves. Schrader’s purge valves are used to purge the engine
before delivery, and to make direct pressure measurements in the engine
during service. Schrader’s engine purge valves consist of a Schrader core
screwed into a metal body. Most valves are mounted in the engine injection
rail. A seal on the valve body ensures sealing with the engine or rail, and a
sealed cap protects the completed system.
Schrader designs and produces engine purge valves as SAFETY products.
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Material: brass, nickel plated brass, aluminum
FPM rubbers
Grey or Blue Cap with NBR or FPM rubber
Flow rate: 11 m3 /h air at 7 bar
Leakage: < 0.2 cc /min at 5 bar at 20°C
Fuel compatibility: M15 – E22 – M3TBA2
100% leak control on automatic assembly line
Air-conditioning automotive applications
Schrader’s air conditioning filling valves are primarily used for loading vehicle
air conditioning circuits with gas, and during service to purge the circuits before
refilling. The product consists of a valve stem, valve core, and plastic cap.
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Material: Aluminum 6082
Body designs: saddle, bore and banjo
In accordance with SAE J639
Gas compatibility: 134a, 1234yf and CO2
Oil compatibility: PAG, POE
Compatible with a wide range of air conditioning couplers
High flow core design
Core rubber: CR, FPM, HNBR, EDPM
Long design cap with seal for better protection
Flow rate: 6 m3 /h mini air at 7 bar
Air leak rate: < 0.2 cc /min at 5 bar at 20°C
Permeability: < 5 g /year
100% leak and vision control on automatic assembly line
PRESSURE RELIEF VALVES
Gasoline High Pressure Relief Valves
Schrader, the expert in engine valves, produces a SAFETY valve for high pressure gasoline engines.
The Schrader High Pressure Relief Engine Valve (HPRV) is
mounted on the high-pressure gasoline rail, and exhausts
gas through the return line if engine over-pressure occurs.
The engine HPRV consists of a brass body, filter, ball and seat.
Special spring O-ring seals ensure air tightness between the
valve and engine. The seat’s cone is manufactured with high
precision to ensure proper sealing with the ball (circularity
and surface finish).
The Schrader HPRV is manufactured on a fully automated
assembly machine with multiple poke-yokes. Each HPRV is
calibrated to the customer’s specific set-point requirement,
100% tested for opening and re-close pressure, and 100%
leak-tested.
• Opening pressure: 122.5 bar ±2.5 bar with atmosphere in return line at a flow rate of 1.6 L /h
• Closing pressure: > 112 bar with atmosphere in return line at a flow rate of 1.6 L /h
• Low hysteresis: < 10 %
Flow L /h
Pressure and Flow
Pressure Bar
• Other opening pressure are available
• Our HPRV are designed to meet every OEM performance specification
• All test benches are available internally for design validation
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PRESSURE RELIEF VALVES
Diesel High Pressure Relief Valves: 2 stages
Safety PRV for high pressure, for example on diesel high pressure management.
Functional sketch:
In case of pressure higher than requested by the system, it is necessary to avoid
equipment damages and inform the user that a dysfunction appears without
completely stopping the engine.
Therefore a special technology has been developed to
relieve the pressure in case of over pressure.
Sequence in case of over pressure:
• The fluid pushes the ball. When the fluid pressure on the sealed area is higher than effort given
by the spring, the ball opens the hole.
• The fluid pressure concern a larger area (head of the plunger) therefore the effort to the spring
gets higher.
• The plunger opens a radial hole to relieve the fluid, therefore the pressure is regulated at a lower
level.
• To reset the PRV, it is necessary to remove pressure into the valve (Stop the pump, for example)
and restart the system.
Closed position
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Fluid opened position
Opened position
PRESSURE RELIEF VALVES
Pressure bar
Pressure curve
Time (sec)
Advantages:
2-Stages PRV procures several advantages regarding a standard PRV:
• After each over pressure the level of regulated pressure is lower than the protection level.
• This technology:
- Avoids vibration between plunger sealing area and seat.
- Obliges the user to maintain the system. The PRV cannot be used as a pressure regulator.
Thanks to the patented Schrader technology called “free ball”: PATENT N° 1253400
• The ratio between first opening pressure and second level can be defined at the conception step
in a very large range.
• The seat can be easy machined and made with very hard raw material (Quenched steel, ceramic…)
to maximize the quality of this critical functional area.
• The free ball replaces expensive and not accurate plunger machined.
• Only one static sealing is requested.
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PRESSURE REGULATOR
Scroll Valves
The Schrader scroll valve regulates the pressure in any gas circuit through a bellow. This is a
completely mechanical regulation system with no electronics. The scroll is mounted in applications
such as air conditioning compressors. It’s a clever design based on a simple mechanical concept, and
is consequently also a robust design. The pressure is regulated by the special bellow. The Schrader
scroll valve is manufactured on a fully automated assembly machine with multiple poke-yokes. Each
valve is calibrated to the customer’s specific set-point requirement, 100% tested for pressure, and
100% leak tested. The scroll valve is easily adjustable for new pressures.
Pb=5 bar
Pb=1.5 bar
Pa=2 bar
Pa=1.5 bar
Pb=5 bar
Pb=1.5 bar
Pa=2 bar
Pa=1.5 bar
Material: brass
Dimensions: 32mm*diam. 26 mm
Pressure Pb Kg /cm2
Pressure Curve
0.11 Kg /cm2 Max Hysteresis
Pressure Pa Kg /cm2
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OTHER VALVES
Burst Valves
A Schrader burst valve is a safety device which protects gas circuits from over-pressure. The burst
valve consists of a calibrated metal burst disk which burst due to overpressure. Several packaging
are available and several burst pressures are available.
Technical specifications:
For example for CO2 transcritic applications
• Burst pressure: 120 ± 10 bar
• Gas emissions: < 1 g /year
For Aircraft tyre :
Burst pressure
• At 20°C: > 25,1 bar
• At 200°C: < 41 bar
One-Way Valves
Schrader International designs and produces
also one way valves, for example made of
stainless steel. The design can be adjusted in
accordance with customer needs.
Pressure and Flow
Technical specifications:
Flow m3 /h
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Gas compatibility: 134a
Oil compatibility: PAG
Opening pressure: Max 0.2 bar
Flow rate: min 1.80 m3 /h
900.000 open-close
Pressure Bar
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MANUFACTURING EXCELLENCE
Plasting molding
Machining
Rubber overmolding
Assembling and control
Quality with a Purpose
Schrader Quality means defect-free
Highest-quality solutions via high automation
Proven track record
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CERTIFICATIONS
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VALVES POUR APPLICATIONS INDUSTRIELLES
REFRIGERATION AND AIR-CONDITIONING PRODUCTS
VALVES FOR INDUSTRIAL APPLICATIONS
MÉCANISMES ET BOUCHONS POUR APPLICATIONS INDUSTRIELLES
VALVES AÉRONAUTIQUES ET PRODUITS HAUTE PRESSION
CORES AND CAPS FOR INDUSTRIAL APPLICATIONS
AERONAUTIC VALVES AND HIGH PRESSURE PRODUCTS
u capital de 4.712.183 Euros
820 896 RCS Besançon
Schrader S.A.S - 48 rue de Salins - BP 29
F 25301 Pontarlier Cedex - France
Tél. : +33 (0)3 81 38 56 56 - Fax : + 33 (0)3 81 38 56 29
E-mail : [email protected]
www.schraderinternational.com
S.A.S au capital de 4.712.183 Euros
602 820 896 RCS Besançon
PU-178-FR/GB-1/SP 2012-05/200
Document non contractuel/Schrader se réserve le droit d’apporter toutes modifications à cette documentation ou aux produits eux-mêmes et ceci sans préavis
Uncontracted document/The management of Schrader reserves the right to modify this leaflet and/or the products described therein without notice
PRODUITS POUR LA RÉFRIGÉRATION ET L’AIR CONDITIONNÉ
www.braintrust.fr - PU-163-FR/GB-1/SP2011-11/2000 - Document non contractuel / Schrader se réserve le droit d’apporter toutes modifications à cette documentation ou aux produits eux-mêmes et ceci sans préavis
Uncontractual document / The Management of Schrader reserves the right to modify this leaflet and/or the products described therein without notice
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