Check valves are designed to allow fluids to flow in one direction only and are rated for use in medium- and high-pressure applications. Swagelok check valves come in a variety of designs, including spring and poppet, lift, and all-welded high-purity for use in a range of situations.
Check valves:
- Are designed to allow fluids to flow in one direction only
- Are rated for use in medium- and high-pressure applications
Spring and Poppet Check Valves (C, CA, CH, CP, and CPA Series)
Shop CatalogFeatures
- Adjustable and fixed cracking pressures
- Variety of end connections
- 316 stainless steel and brass materials
Specifications
| Type | Swagelok tube fittings, NPT, ISO, SAE/MS, VCO® O-ring fittings, VCR® face seal fittings |
| Size | 1/8 to 1 in.; 6 to 25 mm |
Check Valves (IPT Series)
Shop CatalogFeatures
- Three designs to fit most applications
- Ball-seal poppet—Metal-to-metal seat
- Soft-seal poppet—O-ring seat; standard material is HNBR (hydrogenated nitrile butadiene rubber)
- Dual-seal ball—Glass-filled PTFE seat, backed by metal-to-metal sealing
- Available for sour gas applications
Specifications
| Type | Swagelok medium-pressure tube fittings (soft-seal and ball-seal only), female NPT, cone and thread |
| Size | 1/4 to 3/4 in. (medium-pressure tube fitting); 1/8 to 1 in. (female NPT), 1/4 to 1 in. (cone and thread) |
Lift Check Valves (50 Series)
Shop Catalog
Lift check valves limit reverse flow - forward flow lifts the poppet, opening the valve. Reverse flow seats the poppet against the orifice, closing the valve. The lift check valve is gravity assisted and must be mounted horizontally, with bonnet nut on top.
Features
- Rugged, all-stainless steel construction
- Union bonnet design
- Metal-to metal seal
- No springs or elastomers
- Compact size
Specifications
| Type | Swagelok tube fittings, female NPT, tube socket weld or pipe butt weld |
| Size | 1/4 to 3/4 in.; 6 mm |
All-Welded, High-Purity Check Valves (CW Series)
Shop Catalog
The CW series high-purity check valve is designed for clean operation and reliable fluid containment.
Features
- All-welded design provides reliable containment of system fluid
- 316L SS body offers enhanced material purity
- Choice of standard or high-purity wetted surface finishes
- Tube butt weld, female VCR® fitting, integral male VCR fitting, rotatable male VCR fitting, and Swagelok tube fitting end connections are available
Specifications
| Type | Tube butt welds, VCR® face seal fittings, Swagelok tube fittings |
| Size | 1/4 to 1/2 in.; 6 mm |
UHP Check Valves, O-Ring-Free Polymer (CHP Series)
Catalog
CHP series UHP fluoropolymer check valves provide low cracking and reseal pressure and contain wetted components that meet SEMI Standard F57-0301 for ultrahigh-purity system components.
Features
- Modified PTFE wetted components meet SEMI Standard F57-0301 for ultrahighpurity system components
- Fine thread flare and Nippon Pillar® Super 300 end connections
- Low cracking and reseal pressure
Specifications
| Type | Fine thread flare, Nippon Pillar® Super 300 |
| Size | Small body: 1/4 and 3/8 in.; 6 and 10 mm |
| |
Medium body: 1/2 and 3/4 in. |
"Safe Product Selection:
The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.
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