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.
Specifications
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
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 |
|