All-Welded, High-Purity Check Valves—CW Series
With all-welded 316L stainless steel body and springless design,
the Swagelok® CW series check valve is designed for clean operation and
reliable fluid containment.
Specifications
Working Pressure
Temperature
Cracking Pressure
Maximum Back Pressure
Maximum Pressure Drop
Minimum Burst Pressure
at 70°F (20°C)
Flow Coefficient
Body Material
End Connections
• Type
• Size
|
Up to 3000 psig (206 bar)
–10 to 400°F (–23 to 204°C)
Less than 2 psi (0.14 bar)
Full pressure rating
145 psi (10.0 bar)
12 000 psig (826 bar)
0.55 and 0.70
316L stainless steel
Tube butt welds, VCR® face seal fittings, Swagelok tube fittings
1/4 to 1/2 in.; 6 mm
|
Features
- Forward flow starts at less than 2 psig (0.14 bar) pressure
differential.
- Valve closes with less than 2 psig (0.14 bar) back pressure.
- Choice of standard or high-purity wetted surface finishes.
- Poppet is fluorocarbon FKM-bonded 316L stainless steel; other
materials are available
CW Series Check Valve Process Specifications
Standard, no process designator: Special Cleaning and Packaging
(SC-11)
- Special cleaning with non–ozone-depleting chemicals
- Performed in specially cleaned areas; valves are individually
bagged
- 20 µin. (0.51 µm) average, machine finished.
Ultrahigh-purity, process designator P: Ultrahigh-Purity Process
Specification (SC-01)
- Ultrahigh-purity cleaning with a continuously monitored,
deionized water, ultrasonic cleaning system
- Performed in ISO Class 4 work areas; valves are double bagged
and vacuum sealed in cleanroom bags
- 8 µin. (0.20 µm) average, machine finished and
electropolished.
Testing
All CW series check valves are factory tested for crack and
reseal performance.
Options
Aflas®, Buna N, ethylene propylene, and neoprene poppet bonding
materials are available.