nlj prcd "u" series bellows valves

NLJ PRCD
"U" SERIES BELLOWS VALVES
Hardened 440C stainless steel actuators in all valves provide maximum strength and wear resistance.
Additional features include: Non-rotating stem tip to eliminate galling • Bottom and panel mounting • Low operating
torque (25 in. lbs. at maximum operating pressure) • Replaceable stem adapters in the " 6 U " and " 8 U " gasketed
models* Bellows sealed for long service life* Reliable union
bonnet construction • Safety back seat sealing is standard
in all " U " Series valves • 100% helium leak testing of every
valve across the seat and at potential leak points • Choice
of SWAGELOK, socket or butt weld end connections to ease
installation • A variety of tube extensions can be welded
to the valves on request as described on page 5 • A
bellows regulating valve, " 4 U R " Series, is available for
those applications requiring fluid control and the additional feature of metal-to-metal shut-off • Angle pattern
models also available.
Choice of models:
"UW" SERIES
In the N U P R O " U W " Series Bellows Valve, the bellows-to-stem,
bellows-to-ring, and bellows assembly-to-body seals are HELI-ARC
welded providing an all metal, hermetically sealed valve. The all welded design, with SWAGELOK, socket
or butt weld end connections, is
primarily used in critical fluid sysMETAL STEM TIP
tems where leakage cannot be tolerated. Applications nclude vacuum, extremely high pressures and temperatures with dangerous or hazardous
fluids, where in the event of leakage, safety to personnel
and surrounding equipment is the primary concern.
LOWER
SECONDARY SEAL
316 STAINLESS STEEL
ORING
PURPOSE
The NUPRO " U " Series Bellows Valve, with its many optional features, offers versatility of application to the most
difficult fluid handling problems. Bellows valves are used
in critical service where reliability greater than that given
by sliding seals is required. The " U " Series design with the
secondary sealing system, fills the need for a safe, reliable,
double sealed valve for service at cryogenic or high temperatures, high vacuum or pressures with corrosive, dangerous, radioactive, hazardous or toxic fluids.
OPERATION
NUPRO " U " Series Bellows Valves are operated by simply
turning the bar handle. Approximately 1 3A turns on the
" 4 U " and 2VA turns on the " 6 U " and " 8 U " Series will
open the valves to full flow.
APPLICATIONS
Containment and control of toxic, radioactive, hazardous,
corrosive and expensive fluids are general applications. •
Cryogenics • High pressures and temperatures • Liquid
metals • High vacuum systems • Power plants • Ultrapure systems • Instrumentation systems and panels •
Critical sampling systems.
SPECIAL FEATURES
Positive stem retraction is provided by the ball joint, double
pin design which insures positive lifting of the stem. In
certain very clean, high temperature systems, valves may
tend to stick in the closed position. In the " U " Series design, the double pins engage a shoulder on the stem,
lifting the stem tip free should sticking occur.
Secondary sealing system prevents leakage to atmosphere
in the event of a bellows rupture due to over-pressurization.
Leakage past the bonnet-ring joint is contained by a 316
stainless steel O-Ring. Leakage past the actuator is contained by a three-piece Asbestos-lnconel packing (optional
TFE). A jam nut is provided for locking the upper packing
nut.
Acme power transmission threads are used on the bonnet
and actuator because of the extreme force loads transmitted to the threads in a high pressure bellows valve.
This eliminates normal thread problems of galling, seizing,
short life and high operating torques. The Acme threads
are not in contact with the process fluid and are protected
from atmospheric contaminants by the secondary packing.
Thread lubricant is also contained by the secondary packing, even at high temperatures.
BODY TO BELLOWS
SUB ASSEMBLY SEAL
ALL WELDED
CONSTRUCTION
"UG" SERIES
The NUPRO " U G " Series valve
offers the same leak-tight integrity
0" 3
O-RING
as the all welded model except the
body-to-bellows subassembly seal
is maintained by a solid 316 stainless steel O-Ring. Suggested applic a t i o n s for t h e m e t a l g a s k e t e d
model are vacuum, high pressures
and temperatures with a variety of
difficult fluid media. The " U G "
Series valves offer additional savings to the user by providing replaceable stem tips or bellows subassemblies in
the event of damage through normal or extended use.
cprninMvcFA!
ITFFI
316 STAINLESS
STEEL
IN(
BODY TO BELLOWS
«SEMBLY SEAL
STAINLESS STEEL
SUB
3l6
UK" SERIES
LOWER
SECONDARY SEAL
316 STAINLESS STEEL
O RING
BODY TO BELLOWS
ASSEMBLY SEAL
KEL F GASKET
S UB
The NUPRO " U K " Series valve
offers the same benefits as the
" U G " model but Kel-F soft seat
shut-off is featured for specialized
applications such as cryogenics,
vacuum, or pressurized systems at
moderate temperatures. The bodyto-bellows subassembly seal is also
maintained by a Kel-F gasket.
Bonnet Port (optional)
As shown, a bonnet having a
tube extension welded to
it can be used for carrying fluid back to a reservoir, or to
activate an alarm in the event of a bellows rupture.
Another use would be to provide a vacuum insulation above
the bellows during cryogenic service, or to pressurize the
outside of the bellows for higher pressure service. A bonnet
having two VA" tube extensions welded to it may be useful
during high temperature operation to pass an inert cooling
NUPRO®
"H" SERIES BELLOWS VALVES
Temperature Gradient
fluid through the upper bonnet tubes. Continuous heat
dissipation would help extend valve life. Add -T1 or -T2 as
a suffix to the valve part number when ordering valves with
monitoring bonnets.
WHEN VALVE SEAT IS °F
VALVE HANDLE IS ° F
600
135
900
140
1200
150
MATERIALS
Partial Section
One
tube
extension welded
to the bonnet
Partial Section
Two y r tube
extensions welded
to the bonnet
Bar Handle—Anodized aluminum, Hunter Green with steel
set screw.
Pins—Hardened type 416 stainless steel (solid).
Ball Bearing, Actuator, Stem Extension—Hardened 440C
stainless steel.
Bellows*—347 seamless stainless steel.
Upper Secondary Packing—Asbestos-lnconel (TFE optional
on special order). T F E standard in " U K " Series.
Lower Secondary O-Ring Seal—316 stainless steel.
Stem Insert—Solid Stellite #6B.
All Other Parts—Type 316 stainless steel.
NOTE: When pressurizing above the bellows through the bonnet port or ports, system
or bellows internal pressure must be greater than the external bellows pressure before
the valve is operated. The maximum pressure rating above the bellows is 1000 psi.
60% of the pressure supplied above the bellows may be added to the internal or system
pressure ratings. This proportion factor is necessary because of force distribution and
areas within the valve.
TECHNICAL DATA
VALVE STEM
SERIES TYPE
"4U"
Vee
Kel-F
"6U"
"8U"
ORIFICE
SIZE
(INCHES)
0.172
0.281
(port)
0.312
FLOW
COEFFICIENT,
Cv
0.36
1.0
1.2
MAXIMUM
DEAD
TEMPERASPACE
TURE
(APPROX.)
RATING
"4UK" 300°F 0.11 cu. in.
"6UK-8UK"
2500 psi
200°F 0.25 cu. in.
"UG" 650° F
"UW" 1200°F 0.27 cu. in.
MAXIMUM
PRESSURE
RATING
*0n special order, the "U" Series Bellows Valve is available with an Inconel bellows
which substantially improves cycle life, especially at high pressures and temperatures.
Some applications requiring Inconel's outstanding corrosion resistance would be
boiling water, heavy water, and pressurized water reactor systems. Specify an Inconel
bellows when ordering.
Pressure and Temperature
Ratings (Internal)
" U W " SERIES
2500 psi (max.) @ 650°F
600 psi @900°F
250 psi @ 1200°F (max.)
" U G " SERIES
" U K " SERIES
2500 psi @ 650°F
"4UK"
2500 psi @ 300°F
"6UK-8UK"
2500 psi @ 200°F
NOTES:
1. In applicatiQns involving thermal cycling above 650°F, the "UW" Series valves are
recommended.
2. For high temperature service with self-lubricating fluids such as liquid metals,
ratings may be extended to 50 psi (max.) at 1500°F (max.). (Use -HT model).
3. For applications above 900°F, "UW" Series valves can be supplied in a factory
prepared High Temperature (-HT) model. For ordering instructions, see Note 2
under Table of Dimensions.
4. The maximum temperature rating of "U" Series valves with optional TFE secondary packing is +400°F.
TABLE OF DIMENSIONS
CONNECTION
SIZE
" U " SERIES VALVES
PART
NUMBER®©
INLET
AND
OUTLET
ORIFICE
(INCHES)
DIMENSIONS©
A
OPEN
A
CLOSED
B
OPEN
L
M
HEX
9
21/2
1
1
5V32
—
1
1
m
5*fe
11/8
31/8
I1/2
11/8
5^32
1%
—
I1/2
11/8
Va SWAGELOK
631/64
6 %
SS-4UW-TSW©
0.172
%TSW / % MTW
631/64
6%
0.281
5 /
3
65/8
633/64
SS-6UW-TSW©
0.281
(port)
3/8TSW/y2MTW
65/8
SS-8UW
0.312
SS-8UW-TSW©
0.312
SS-6UW-MM
SS-10UW-MM
/s SWAGELOK
K
1
0.172
(port)
D
H
DIA. SWAGELOK
1
SS-4UW
SS-6UW
C
OPEN
559/64
59
64
5V32
w
—
—
—
3/8
1/4
—
—
—
—
1/2
Vi
21/4
—
—
—
—
3/4
Vz
21/4
/l6
—
—
—
—
—
—
"/IB
633/64
6^8
Vz SWAGELOK
6 /8
6»/64
11/8
3 /ie
I1/2
11/8
65/8
%
11/8
—
IV*
631/64
6 %
559/64
51/32
1
I1/2
4.37MM
6MM SWAGELOK
6 /64
m
m
5V32
&TSW/3/4MTW
21/2
1
1
9
7.14MM
(port)
10MM SWAGELOK
65/8
633/64
6V8
51/32
11/8
31/8
I1/2
1H
3
33
s
SOCKET
WELD
DIA.
/l6
5
5
N
BUTT
WELD
DIA.
/4
© I f optional TFE secondary packing is desired in place of standard Asbestos-lnconel, add -TFE as a suffix to the above part numbers. Example: SS-4UW-TFE.
©To order
specially prepared High Temperature (HT) models, add -HT as a suffix to the above part numbers. Example: SS-4UW-TSW-HT. TFE secondary packing is standard in "UK"
Series valves. To order, add -TFE as a suffix to the part number. Example: SS-6UK-TFE. Gasketed models, "UG" Series, and regulating models, "4UR" Series, are available.
Example: SS-8UG, SS-4URG.
©Dimensions shown with SWAGELOK nuts finger-tight, when applicable.
©Factory welded tube extensions can be supplied (See page 5).
—
l»/l«
NUPRO®
"H" SERIES BELLOWS VALVES
FLOW CAPACITY CURVES
FLOW COEFFICIENT (Cv) • TURNS OPEN
FLOW COEFFICIENT(Cv) * TURNS OPEN
FLOW COEFFICIENT (Cy) • TURNS OPEN
"12U" SERIES BELLOWS VALVES
APPLICATIONS
Liquified gases • Pilot plants • High temperature systems
• Vacuum systems • Super heated steam • Feedwater
and coolant sampling • Rod controls (Nuclear) • Cryogenic systems • Radioactive or explosive gases, toxic
fluids • Liquid metal systems.
SCOPE
The NUPRO " 1 2 U " Series Bellows Valves are designed to
increase the service capability of double sealed bellows
valves in the larger flow ranges. This has been accomplished by inverting the longer bellows to eliminate "slinking," or distortion, while increasing stability and cycle life.
The " 1 2 U " Series valves provide the following additional
features: Welded or gasketed models • Non-rotating stem
tip • Positive stem retraction • Secondary sealing system
• Safety back seat sealing • Bonnet port • Choice of
mountings • Straight or angle patterns • Union bonnet
construction • Long service life • Protected threads •
Low operating torque • Acme power transmission threads
• Socket or butt weld end connections • 100% helium
leak tested.
TECHNICAL DATA
PURPOSE
NUPRO " 1 2 U " Series Bellows Valves offer higher flow
capacity in an inverted bellows design to meet the most
critical fluid handling requirements. The large capacity,
compact design is safety engineered with all of the fine
features of the smaller "4U-6U-8U" Series NUPRO Bellows
Valves.
OPERATION
NUPRO " 1 2 U " Series Bellows Valves are operated by
simply turning the handle. Approximately 2Vz turns will
open the valve to full flow. Operating torque is very low,
even at maximum rated pressure.
VALVE STEM
SERIES TYPE
"12U"
"12UA"
Vee
Kel-F
ORIFICE
SIZE
(INCHES)
BODY PORT
FLOW
COEFFICIENT,
Cv
0.625 0.500
3.1
0.625 0.625
5.3
MAXIMUM
MAXIMUM
TEMPERAPRESSURE
TURE
RATING
RATING
"UK" 200°F
2500 psi "UG" 650°F
"UW" 1200°F
NOTES:
1. In applications involving thermal cycling above 650°F, the "UW" Series valves are
recommended.
2. For high temperature service with self-lubricating fluids such as liquid metals,
ratings may be extended to 50 psi (max.) at 1500°F (max.).
3. The maximum temperature rating of "12U" Series valves with optional TFE secondary packing is +400°F.
4. Complete technical data for NUPRO "12U" Series Bellows Valves is supplied in
NUPRO Technical Bulletin No. 28A.
YOUR LOCAL SALES & SERVICE REPRESENTATIVE
PRINTED IN U.S.*.
4-78-100M-525M-CL