NH3

Threaded back check valves for one directional LPG/NH3 flow

Threaded back check valves are one-way valves that protect container contents from escaping if piping or fittings accidentally break. Frequently they are found in gas installations where there is a requirement for a high, single directional flow.

Product description

As back check valves provide a one-way flow security functionality, they are ideal for installation in pipelines flowing into pressure tanks and pump discharge lines as they will close off if the flow-direction changes or stops.

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Material

Body: Brass, cadmium plated steel, carbon steel, stainless steel
Disc: Brass, cadmium plated steel
Stem: Brass, stainless steel, cadmium plated steel
Spring: Stainless steel, carbon steel
Seat disc: Synthetic rubber
Guide: Carbon steel, stainless steel
Poppet: Stainless steel

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Specifications

Gas types: LPG (Propane, Butane), NH3 (Ammonia, Anhydrous Ammonia)
Connections: Thread
Type: NPT
Operating pressure: Up to 27.5 bar (400 psi)
Internal pressure: Up to 131 bar (1900 psi)
Temperature range: -45˚C to +148˚C (-50˚F to +300˚F)
Sizes and range: 1/2" to 3"
Series: 33146 Series, 3176 Series, A3186, A3187S, A3196, A3276BC, A6586D, A6586D, A3400L4, A3400L6, 302 model, 143 model, 51 model and 50 model 
Standards: UL listed, CE-PED

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application. 

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Features

  • Heavy-duty construction for long life endurance
  • Positive seal of soft seat valves due to synthetic rubber seat disc
  • Faster flow rate provided by swing-away checks
  • Low pressure due to generous flow channels
  • Faster filling of bulk tanks
  • Available in steel, brass and stainless-steel

Did you know?

MAKEEN Gas Equipment can provide a threaded type with a threaded flange connection available in 1-½" to 8"

Alternative products

  • Flanged back check valve

    Back check valves (flanged)

    One-directional valves to close off flow if direction is changed or stopped, thereby making sure that the contents of a container do not escape in case of broken piping or fittings.One-directional valves to close off flow if direction is changed or stopped, thereby making sure that the contents of a container do not escape in case of broken piping or fittings.

    See our flanged back check valves

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