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- Tel: 010-88362920
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Check Valves
Swagelok® offers a broad line of adjustable and fixed cracking pressure check valves to control back flow in general-service and high-purity applications.
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)
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 Pressures | Up to 6000 psig (413 bar) |
| Temperature | –50 to 400°F (–45 to 204°C) |
|
Nominal Cracking Pressure |
|
| Fixed | 1/3 to 25 psi (0.02 to 1.7 bar) |
| Adjustable | 3 to 600 psi (0.21 to 41.4 bar) |
| Body Material | 316 stainless steel, brass |
| Seal Material | Fluorocarbon FKM, Buna N |
| Flow Coefficient | 0.10 to 4.7 |
|
End Connections |
|
| 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)
Ball-seal poppet, soft-seal poppet or dual-seal ball check valves are available with working pressures up to 60 000 psig (4134 bar) and a nominal cracking pressure of 15 psi (1.0 bar) in 316 stainless steel with end connections 1/4 to 1 in. in size. These valves are available for sour gas applications with materials selected in accordance with NACE MR0175/ISO15156.
Specifications
| Working Pressures | Up to 60 000 psig (4134 bar) |
| Temperature | Up to 650°F (343°C) |
|
Nominal Cracking Pressure |
15 psi (1.0 bar), optional pressures available |
| Body Material | 316 stainless steel |
| Seal Options | Ball-seal poppet – metal-to-metal seat |
| Soft-seal poppet – O-ring seat, standard material is HNBR | |
| Dual-seal ball – glass-filled PTFE seat, backed by metal-to-metal sealing | |
|
End Connections |
|
| 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)
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.
Specifications
| Working Pressures | Up to 6000 psig (413 bar) |
| Temperature | –65 to 900°F (–53 to 482°C) |
| Body Material | 316 stainless steel |
| Poppet Material | S17400 stainless steel |
| Flow Coefficient | 0.30 to 2.20 |
|
End Connections |
|
| 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)
The CW series high-purity check valve is designed for clean operation and reliable fluid containment.
Specifications
| Working Pressures | Up to 3000 psig (206 bar) |
| Temperature | –10 to 400°F (–23 to 204°C) |
| Body Material | 316L stainless steel |
| Cracking Pressure | Less than 2 psi (0.14 bar) |
| Maximum Back Pressure | Full pressure rating |
| Maximum Pressure Drop | 145 psi (10.0 bar) |
| Minimum Burst Pressure | 12 000 psig (826 bar) at 70°F (20°C) |
| Flow Coefficient | 0.55 and 0.70 |
| End Connections | |
| 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)
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.
Specifications
| Working Pressures | Up to 80 psig (5.5 bar) |
| Media Temperature | 50 to 185°F (10 to 85°C) |
|
Body Material |
|
| Small Body | Modified PTFE |
| Medium Body | PFA |
|
Cracking Pressure |
|
| Small Body | Less than 1.5 psig (0.11 bar) |
| Medium Body | Less than 0.9 psig (0.07 bar) |
| Reseal Pressure | Up to 0.5 psig (0.04 bar) |
| Flow Coefficient | Up to 4.1 |
|
End Connections |
|
| 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. |