Check Valves

* Max. working pressure: 6000 psig (414 bar)
* Working temperature: -53～482°C (-65～900°F)
* Size: 1/8″ to 1″, 6mm to 25mm, 1/4xSCH80, 3/8xSCH80, 1/2xSCH80
* Stainless steel 316, 316L, brass, alloy 400 material
* AmsSystem standard cleaning
* Packaging: single bagged with inner box and outer carton
* Permanently Heat code marked; traceable to original mill certificate of test
* Critical surfaces are 100% visually inspected using magnification and lighting
* All valves 100% factory tested and come with high-quality appearance

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Description

AmsSystem instrumentation one way non return check valves have been well accepted and widely used in a variety of industries for many years. Fixed cracking pressure, non-adjustable cracking pressure and adjustable cracking pressure are for option. Each valve is tested with nitrogen for leak-tight performance at its maximum working pressure. Six different types of valve constructions are for options. In compliance with NACE MR0175 is available. Cracking pressure—the upstream pressure at which the first indication of flow occurs. Variety of end connection types available: female/male NPT, BSPT, BSPP, female/male metric thread, fractional/metric double ferrule tube fitting compression fitting, tube butt weld, metal gasket face seal fitting.

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Poppet Check Valves – Fixed Cracking Pressure

* Working pressure up to 3000 psig (207 bar)

* Working temperature -23°C to 190°C (-10°F to 375°F)

* End connections: 1/8″ to 1″, 6 mm to 12 mm

* End types: tube fitting, male/female NPT, BSPT, BSPP, MR fitting, tube butt weld etc.

* Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)

* Resilient O-ring seat design for leak free sealing

* Fixed cracking pressure, mountable in any directions

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Stainless Steel Check Valves – Fixed Cracking Pressure

* Working pressure up to 6000 psig (414 bar)

* Working temperature -23°C to 204°C (-10°F to 400°F)

* End connections: 1/8″ to 1″, 6 mm to 25 mm

* End types: tube fitting, male/female NPT, BSPT, BSPP, MR fitting, tube butt weld etc.

* Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)

* Seat ring continuously cleaned by media, avoiding secondary pollution

* Mountable in any directions, NACE MR0175 available

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One-Piece Check Valves – Fixed Cracking Pressure

* Working pressure up to 3000 psig (207 bar)

* Working temperature -23°C to 190°C (-10°F to 375°F)

* End connections: 1/8″ to 1/2″

* End types: male NPT, female NPT, male BSPT, female BSPT

* Cracking pressure: 1/3 to 25 psig (0.02 to 1.7 bar)

* One piece body, Compact design

* Mountable in any directions, NACE MR0175 available

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One Piece Check Valves – Adjustable Cracking Pressure

* Working pressure up to 3000 psig (207 bar)

* Working temperature -23°C to 190°C (-10°F to 375°F)

* End connections: 1/4″ to 1/2″

* End types: male NPT, female NPT, male BSPT, female BSPT

* Cracking pressure: 3 to 600 psig (0.2 to 41.4 bar)

* One piece body, Compact design

* Various springs available. Valves can be set and tested as per the specified cracking pressure

* Mountable in any directions, NACE MR0175 available

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Poppet Check Valves – Adjustable Cracking Pressure

* Working pressure up to 3000 psig (207 bar)

* Working temperature -23°C to 190°C (-10°F to 375°F)

* End connections: 1/4″, 6 mm and 8 mm

* End types: fractional tube fitting, metric tube fitting, male MR fitting

* Cracking pressure: 3 to 600 psig (0.2 to 41.4 bar)

* Various springs available

* Valves can be set and tested as per the specified cracking pressure

* Mountable in any directions, NACE MR0175 available

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Lift Check Valves – Fixed Pressure

* Working pressure up to 6000 psig (414 bar)

* Working temperature -53°C to 482°C (-65°F to 900°F)

* End connections: 1/8″ to 3/4″, 6mm, 1/4xSCH80, 3/8xSCH80, 1/2xSCH80

* End types: fractional tube fitting, metric tube fitting, male MR fitting

* Rugged, all-stainless steel construction

* Union bonnet design, horizontal installation with bonnet nut on top

* Reverse flow coefficient less than 0.1% of forward flow coefficient

* NACE MR0175 available