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886/886M Series - Stainless Steel Swing Check Valves

886/886M Series - Stainless Steel Swing Check Valves

886 Series - Stainless Steel Swing Check Valves - Soft Seat

886M Series - Stainless Steel Swing Check Valves - Metal Seat

The Evergreen Midwest Swing Check Valves are proven to be used for cryogenic systems. Swing check valves are designed for higher fluid capacity than the lift or poppet check valves. The 886 Series Stainless Steel Swing Check Valves feature a soft seat whereas the 886M Series Valves have a metal seat.

Key Features:

  • Bolted bonnet valve services from the top and can be permanently installed in the line
  • 316L stainless steel investment cast body, cap and arm
  • Prevents back flow in cryogenic systems
  • Higher fluid capacity (Cv) than poppet or lift check valves
  • High cycle life and superior sealing.
  • Sizes: ½”through4” (15mmthrough100mm)
  • Ends: Socket weld and butt weld schedule 10 and 40
  • Temperature Rating: -325°Fto150°F(-196°Cto+66°C)
  • Superior sealing properties and durable construction
  • Ideal for LNG storage and handling as well as liquid atmospheric gases
  • Valves for hydrogen service can be supplied (-425°F to +350°F)
  • Pressure Rating : (Cold, Non-shock)

                  -  400PSIG(27Bar)½”-2”

                  -  275PSIG(19Bar)150#ANSIClass3”and4”

                  -  720PSIG(50Bar)300#ANSIClass3”and4”

                  -  PED Approved, Approved for US and Canada

                   Note: Do not use for reciprocating gas service

Our investment cast stainless steel is specified by leading industrial gas companies for storage tank and yard operations.


A swing check valve is made up of three parts:


  • Valve Body
  • Bonnet
  • Disc connected to a hinge


With increase in flow, the disc moves away from the valve body to allow forward flow of content. As the pressure of flow decreases, the disc begins to come back to the valve body, closing the flow and preventing backflow in turn.


The swing check valves are manufactured in various sizes and designs to allow for varied applications.  These valves open fully with high pressure and close down completely as flow dies out.


Evergreen Midwest provides swing check valves manufactured with stainless steel and soft seats. Use of stainless steel makes these valves easier to maintain.



Swing check valves are mainly designed to prevent flow back in cryogenic systems. These valves, each manufactured with stainless steel and a metal seat, are available from Evergreen Midwest in following sizes:


½ inch to 4 inch i.e. (15 mm to 100 mm)


These valves are manufactured in multiple designs and sizes, as they're intended for use in multiple fields to prevent backflow by closing off flow with decreased pressure.


The metal seat of a swing check valve valve provides increased strength, allowing the valve to withstand a higher range of pressures (as compared to those with a soft seat).


Evergreen Midwest provides swing check valves in the above sizes - from ½ inch to 4 inches.