Check Valves

• Spring-and-poppet check valves—C, CA, CH, CP, and CPA series
• Lift check valves—50 series
• All-welded check valves—CW series
• Ultrahigh-purity O-ring–free fluoropolymer check valves—CHP series
• Disk, ball, and air blow check valves

Swagelok spring-and-poppet check valves are available with nominal cracking pressures ranging from 1/3 to 600 psi (0.03 to 41.4 bar) in 316 stainless steel and brass and with end connections 1/8 to 1 in. and 6 to 25 mm in size.

Specifications Working Pressure Temperature Nominal Cracking Pressure    •  Fixed   •  Adjustable Flow Coefficient Body Material Seal Material End Connections •  Type  •  Size

Up to 6000 psig (413 bar) –50 to 400°F (–45 to 204°C) 1/3 to 25 psi (0.02 to 1.7 bar) 3 to 600 psi  (0.21 to 41.4 bar) 0.10 to 4.7 316 stainless steel, brass Fluorocarbon FKM, Buna N Swagelok tube fittings, NPT, ISO, SAE/MS, VCO® O-ring fittings, VCR® face seal fittings 1/8 to 1 in.; 6 to 25 mm

Lift Check Valves—50 Series
Swagelok lift check valves limit reverse flow under pressures up to 6000 psig (413 bar) and temperatures up to 900°F (482°C). 
 

Specifications Working Pressure Temperature Forward Flow Coefficient Body Material Poppet Material End Connections •  Type •  Size

Up to 6000 psig (413 bar) –65 to 900°F (–53 to 482°C) 0.30 to 2.20 316 stainless steel S17400 stainless steel Swagelok tube fittings, female NPT, tube socket weld or pipe butt weld 1/4 to 3/4 in.; 6 mm

More Information
Download the Lift Check Valves—50 Series catalog.
Find lift check valves in the product search.
See lift check valve features and options.

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All-Welded 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

More Information
Download the All-Welded Check Valves—CW Series catalog.
Find high-purity check valves in the product search.
See all-welded check valve features and options.

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UHP Check Valves, O-Ring–Free Fluoropolymer—CHP Series
CHP series UHP fluoropolymer check valves provide low cracking and reseal pressure, leak-tight integrity during thermal cycling and high-pressure applications, and reduced turbulence and minimized pressure drop.

Specifications Working Pressure Media Temperature Body Material •  Small Body •  Medium Body Flow Coefficient Cracking Pressure •  Small Body •  Medium Body Reseal Pressure End Connections •  Type •  Size

Up to 80 psig (5.5 bar) 50 to 185°F (10 to 85°C) DuPont® Teflon® (modified PTFE) PFA Up to 4.1 Less than 1.5 psig (0.11 bar) Less than 0.9 psig (0.07 bar) Up to 0.5 psig (0.04 bar) Fine thread flare, Nippon Pillar® Super 300 Small body: 1/4 and 3/8 in.; 6 and 10 mm Medium body: 1/2 and 3/4 in.

Disk, Ball, and Air Blow Check Valves
Vertical Disk Check Valves

• Prevent product backflow in vertical applications
• 304 SS or 316L SS construction
• Metal seat standard; O-ring seats also available

Ball Check Valves

• Limit product backflow
• 316L SS construction
• Buna N ball; nylon, EPDM, and fluorocarbon FKM also available

Air Blow Check Valves

• Limit product backflow with simple air-to-open, spring-to-close operation
• 316L SS construction
• Bonded synthetic rubber plug assembly
• Buna N gasket

More Information
Download the Stainless Steel Valves for the Sanitary Industries catalog.
Contact your authorized Swagelok sales and service representative.

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