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      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

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      ShopCatalog

      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.

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      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

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      ShopCatalog

      Ball-seal poppet, soft-seal poppet or dual-seal ball check valves are available with working pressures up to 60000 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.

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      Working Pressures Up to 60000 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)

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      ShopCatalog

      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.

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      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

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      ShopCatalog

      The CW series high-purity check valve is designed for clean operation and reliable fluid containment.

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      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 12000 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

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      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.

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      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.

      View and purchase our most widely used 产品介绍s.

      Discover more about how Swagelok products can work for you. Browse our catalogs or locate a sales and service center.

      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.

      ⚠ Warning: Do not mix/interchange Swagelok products or components not governed by industrial design standards, including Swagelok tube fitting end connections, with those of other manufacturers.
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