Advanced Specialty Gas Equipment

VALVES
Diaphragm Seal, Diffusion-Resistant Valves

Diaphragm seal valves are mandatory for high purity gas handling systems where inboard diffusion of air or moisture must be kept to a minimum. Their packless design maintains gas purity at maximum levels (typical inboard leakage is less than 2 x 10–8 scc/sec Helium) while permitting operation at pressures ranging from vacuum to 3000 psig. Advanced diaphragm seal valves are available in brass or Type 316L Stainless Steel construction.

The multi-turn version has a hand wheel which operates from “fully closed” to “fully opened” in approximately 3/4 turn. The 1/4-turn version has a lever-type handle which operates from “fully closed” to “fully opened” in a 90° arc. The handle also serves as a visual aid in determining if the valve is open or closed. For example, the valve is open when the handle is parallel to the piping system. The 1/2" NPT diaphragm seal valve can be used on manifolds or systems having higher flow requirements.


Purges & Valves - SG5475N/AG5460N/SG5463N/SG5480NSpecifications
Operating Pressure Range:
   Vacuum to 3000 psig

Operating Temperature Range:
   -40°F to 140°F

Flow Coefficient:

Inlet and Outlet Connections:

Materials of Construction
Body:
Other Metal Parts Exposed to Gas:
   Brass Valves: Brass and Stainless Steel
   Stainless Steel Valves: Type 316 SS
Seat: PCTFE
Diaphragm: Type 316 Stainless Steel

Purges & Valves

Table I

Part No. Body Material Configuration Connections
Inlet
Outlet Flow
Coefficient
(Cv)
SG5440N Brass Bar Stock 1/4-Turn 1/4" NPT male 1/4" NPT female 0.15
SG5441N Brass Bar Stock 1/4-Turn 1/4" NPT female 1/4" NPT female 0.15
SG5442 Brass Bar Stock 1/4-Turn 1/4" compression 1/4" compression 0.15
SG5450N Type 316L SS Bar Stock 1/4-Turn 1/4" NPT male 1/4" NPT female 0.15
SG5451N Type 316L SS Bar Stock 1/4-Turn 1/4" NPT female 1/4" NPT female 0.15
SG5452N Type 316L SS Bar Stock 1/4-Turn 1/4" compression 1/4" compression 0.15
SG5453N Type 316L SS Bar Stock 1/4-Turn 1/4" NPT male 1/4" compression 0.15
SG5460N Brass Bar Stock Multi-Turn 1/4" NPT male 1/4" NPT female 0.17
SG5461N Brass Bar Stock Multi-Turn 1/4" NPT female 1/4" NPT female 0.17
SG5463N Nickel-Plated Brass Multi-Turn 1/4" NPT male 1/4" NPT female 0.17
SG5475N Type 316L SS Multi-Turn 1/2" NPT male 1/2 " NPT female 0.35
SG5480N Type 316L SS Bar Stock Multi-Turn 1/4" NPT male 1/4" NPT female 0.17
SG5481N Type 316L SS Bar Stock Multi-Turn 1/4" NPT female 1/4" NPT female 0.17
SG5482V Type 316L SS Bar Stock Multi-Turn 1/4" male vacuum* 1/4" male vacuum* 0.26
SG5492V Type 316L SS Bar Stock 1/4-Turn 1/4" male vacuum* 1/4" male vacuum* 0.15
* Connection is compatible with 1/4" VCR® fittings.