Check Valves

  1. Home /
  2. Check Valves

Check Valves

A CHECK VALVE or CLACK VALVES , Non-return Valve, Reflux Valve, Retention Valve or One-way Valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. CHECK VALVES are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. CHECK VALVES are often part of common household items. Although they are available in a wide range of size and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.

An important concept in check valves is the cracking pressure which is the minimum differential upstream pressure between inlet and outlet at which the valve will operate. Typically the CHECK VALVE is designed for and can therefore be specified for a specific cracking pressure.

JGV offer quality approved range of CHECK VALVES as per prevailing Industry Standards and as well Client Specifications & Design in varied standard and high grade raw material, to attain maximum level of client satisfaction.

Check Valves

JGV Types of Check Valves

  • Swing Check Valves
  • Dual Plate Check Valve (DPCV)
  • Tilting Disc / Single Disc Check Valve (TD/SD)
  • Non Slam Check Valve (NS)
  • Lift Check Valve

JGV Check Valve Range & Specification

Cast Steel Swing Check Valve :

Size : 50MM to 800MM
Body & Type : Bolted Cover
Operation : Self Operated
Design Standard : BS 1868 / ANSI B 16.34, Face to Face Dimensions ANSI B 16.10, Flanged ANSI B 16.5
Pressure Rating : PN 6, PN 10, PN 16, PN 25, PN 40, PN 64, 150#, 300#, 600#
Testing Standard : BS EN 12266-1 (BS 6755, PART 1)
End Connection : Butt-weld, Flanged RF Serrated
Material Of Construction : WCB / WCC, LCB / LCC, CF8, CF8M, CF3, CF3M
On Request- CN7M, CF8C, Duplex Gr. 4A, Super Duplex Gr.5A / 6A , Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Trim : 13% CR. / SS 410, SS 304, SS 316, SS 304L, SS 316L, Gun Metal, Monel
Customization (On Request) :
  • Jacketed Valves
  • Dash Pot Arrangemets/ Counter Weight
  • Stellited / Hard Faces
  • Nace : MR-01-75
  • API 6D Design

Pressure Seal Swing Check Valve:

Size : 50MM to 600MM
Body & Type : Pressure Seal Cover
Operation : Self Operated
Design Standard : BS 1868 / ANSI B16.34
Pressure Rating : 900#, 1500#, 2500#
Testing Standard : BS EN 12266-1 (BS-6755- PART-1)
End Connection : Flanged, Butt Weld
Material Of Construction : Standard – WCB, CF8, CF8M, WC1, WC6, WC9,C5, C12, C12A On Request – CF3, CF3M, CN7M, CF8C, Duplex- Gr. 4A, Super Duplex- Gr. 5A, Super Duplex- Gr. 6A, Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc
Trim : 13% Cr. / SS 410, Stellited / Hard Faces, SS 304, SS 316.
Customization (On Request) :
  • Jacketed Valves
  • Stellited / Hard Faces
  • Nace : MR-01-75

Forge Steel Lift Check Valve:

Size : 15 mm (1/2″) – 50 mm (2″)
Body & Type : Bolted Cover (BC) / Welded Cover (WC), Lift/Piston Type, Solid Plug, Full Bore, Nipple Extension
Operation : Self Operated
Design Standard : BS 5352 / ANSI B 16.34
Pressure Rating : 800#, 1500#, 2500#
Testing Standard : BS EN ISO 12266-1 (BS 6755, PART 1)
End Connection : Butt-weld, Weld – Flanged, Socket Weld, Screwed BSP or NPT
Material Of Construction
 : Standard – A105, LF2, F304, F304L, F316, F316L, F22
On Request – F9, F11, F91, F321, F347, Alloy-20, Super Duplex, Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Trim : 13% CR. / SS 410, SS 304, SS 316, SS 304L, SS 316L, Stellited, Monel
Customization (On Request) :
  • Jacketed Valves
  • Stellited / Hard Faces
  • Nace : MR-01-75

Dual Plate Check Valve :

Size : 50MM to 800MM
Optional Features : Retainerless Design, Metal to Metal Seated.
Design Standard : API 594 / ASME B16.34
Testing Standard : API 598
Pressure Rating : PN10, PN16, 150#, 300#, 600#
End Connection : Wafer Type, Lugged Type, Flanged.
Material Of Construction : Standard – Cast Iron, WCB, CF8, CF8M On Request – CF3, CF3M, CN7M, CF8C, Duplex- Gr. 4A, Super Duplex- Gr. 5A, Super Duplex- Gr. 6A, Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Seat Material : Nitrile Rubber, EPDM, Viton, Silicon, PTFE.
Trim : SS 410, SS 304, SS 316, SS 304L, SS 316L, Gun Metal, Monel.
Customization (On Request) :
  • Stellited / Hard Faces
  • Nace : MR-01-75

Tilting Disc / Single Disc Check Valve :

Size : 50MM to 600MM
Optional Features : Quick Closing Action
Design Standard : API 6D / ASME B16.34
Testing Standard : API 598
Pressure Rating : PN10, PN16, 150#, 300#
End Connection : Wafer Type, Lugged Type, Flanged.
Material Of Construction : Standard – WCB, CF8, CF8M On Request – CF3, CF3M, CN7M, CF8C, Duplex- Gr. 4A, Super Duplex- Gr. 5A, SuperDuplex- Gr. 6A, Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Seat Material : Nitrile Rubber, EPDM, Viton
Trim : SS 410, SS 304, SS 316, SS 304L, SS 316L, Gun Metal, Monel.

Non Slam Check Valve :

Size : 15MM to 50MM
Optional Features : Quick Closing Action
Design Standard : API 594 / ASME B16.34
Testing Standard : API 598 /BS EN 12266-1
Pressure Rating : PN10, PN16, 150#
End Connection : Wafer Type
Material Of Construction : Standard – CF8, CF8M On Request – CF3, CF3M, CN7M, CF8C, Duplex- Gr. 4A, Super Duplex- Gr. 5A,Super Duplex- Gr. 6A, Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Trim : SS 304, SS 316

General Applications:

CHECK VALVES are mainly referred to cracking, reseal or back pressure for minimal pressure differential between the inlet and outlet at which the first indication of flow that occurs (steady stream of bubbles to prevent back-flow) unseating opening pressure, seating the closing pressure and pressure during flow generated within respectively. As such these are mainly used in Pump Systems, Processes Industries such as Power Plant, Chemical Plant, Cooling & Combustion System, Oil & Gas, Pharmaceuticals, Food & Beverages, Waster Water/Potable Water Systems, Irrigation & Mining application.