Nor-Cal Metal Valve User Manual
Isolation Valves
Section Three
3.1 General Information
3.2 N-Series Valves
3.3 Poppet Valves
3.4 Ball Valves
3.5 Genesis Valves & Fittings
3.6 Manual Butterfly Valves
3.7 Pendulum Valves
3
3.8 Linear Gate Valves
3.9 Bellowless Poppet Valves & Leak Valves 2
3.10 Isolation Valve Heaters
3.11 Bakeable All Metal Valves 3
Nor-Cal Products, Inc.
1967 South Oregon Street
Yreka, CA 96097 USA
Tel: 800-824-4166
or 530-842-4457
Main Fax: 530-842-9130
Sales Fax: 530-841-9189
www.n-c.com
3
Isolation Valves
Ultra-High Vacuum Components Since 1962 • www.n-c.com
SECTION 3.9
Bellowless Poppet Valves & Leak Valves
SPECIFICATIONS
Nomina l Port ODs :
(10 to 38mm)
Materials
Body:
Bonnet s eal:
Poppet seal:
Other O-ring compounds available
Actuation: N ormally close d
3/8 to 11/2 inch
spring-to- close
See page 101 for act uation options
Operating pressure:
Differential pressure
Por t side:
Poppet:
different ial across the valve s eat.
Maximu m temperatur e with Viton sea ls
Sustained:
Intermittent:
Vacuum range:
Options:
micro -switches and a ctuators. Se e page 101
3/8 to 11/2 inches
Electro polished 304 s tainless stee l
Viton
Viton
(10 to 38mm)
60 to 80 psig ( 4-5.5 bar)
Maximum 100 p sig (7 bar)
Maximum 6 psi (0.4 bar)
<150°C
<204°C
-9
>1x 10
mbar - High Vacuum
Fittings, O-rings, air solenoids,
ODs:
Air-to-o pen,
Pneumatic Bellowless Angle Valves
Right angle bellowless poppet valves are now available in sizes from 3/8 thru 11/2 inches (9.53-38.1mm). These valves are typically
used for applications with large differential pressures, extremely high cycle rates or “dirty” processes that cause frequent bellows
failures. Poppet shafts are sealed with double O-rings. Heater jackets and other port and flange configurations are available on
request.
MODEL
NUMBER
ESVP-0382-NWB-5
ESVP-0752-NWB-5
ESVP-1002-NWB-5
ESVP-1502-NWB-5
D
NOMINAL
PORT O D
3
/8 (10) NW-10B 0.66 1.6 5 (41.9) 3.77 (9 6) 5.92 (15 0) 2.25 (57)
3
/4 (19) NW-16B 5.00 2.15 (54.6) 4.27 (108) 6.41 (16 3) 2.25 (57)
1 (25) NW-25B 12 .00 2.0 3 (51.6) 4.03 (10 2) 6.17 (157) 2.25 (57)
1
/2 (38) NW-40B 128.00 2.4 0 (61.0) 5.13 (130) 7.71 (196) 3.00(76)
1
FLANGE
TYPE
L/SEC
(molecular)
A
B
C
Replacement O-Ring & Valve Rebuild Kits
MODEL
NUMBER
ESVP-075-95-5
ESVP-150-95-5
ESVP-075-99-5
C
ESVP-150-99-5
B
A
A
NOMINAL
PORT O D DESCRIPTION
3
/8-1 (10-25) O -ring kit
11/2 (38) O-ri ng kit
3
/8-1 (10-25)
11/2 (38)
Compl ete rebuild k it, include s all valve pa rts exce pt
valve body
Compl ete rebuild k it, include s all valve pa rts exce pt
valve body
D
SPECIFICATIONS
Materials
Body:
Electro polished 304 s tainless stee l
Flanges
clearance bolt holes
clearance bolt holes
Actuation:
Maximum temperature
Vacuum range:
Minimum l eak rate
Normal:
Inlet ga s pressure :
(34 bar)
Poppe t seat life
Unbaked:
<250ºC:
<450ºC:
All dimensi ons are in inches (mm ) & weights
are in pounds ( kg), unless othe rwise noted.
Inlet:
1.33 CF, rotatabl e,
Outlet:
2.75 CF, n onrotatable,
Poppet:
Sapphire
Poppet seat:
Sustained:
Intermittent:
Non-condensible gas:
Copp er
Manual, adjus table set point
<250°C
<450°C
>1x 10
-10
1x10
mbar l/sec.
maximum 50 0 psig
250 to 300 clo sures
80 to 100 closu res
20 to 30 closures
-11
mbar - UHV
1x10-8 mbar l/sec.
Leak Valves
Leak valves are used for controlling gas introduction into high- and ultra-high vacuum systems. They utilize an optically flat sapphire
poppet and a metal seal seat, allowing bakeout temperatures to 450ºC. These valves are manually actuated by a cantilever arm with
precision adjustment threads. The adjustment knobs can be set to allow controlled leak rates as small as 1x10
Replacement sapphire and gasket assemblies are available. Call for pricing.
MODEL
NUMBER
LL-275 -133
1.750
(44.45)
Rotatable
4.350
(110.49)
1.298
(32.97)
1.717
(43.61)
1.190
(30.23)
Nonrotatable
-10
mbar l/sec
.
2
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