Check Valves Video

: http://valvemakerfactory.com/4-check-valve.html

Check valves are used to prevent medium backflow by automatically opening and closing of the discs. Check valves are mainly used in one-way pipelines, allowing only one direction of media flow to prevent accidents.

Check valves can be divided into four types according to the movement mode of the disc: Swing Check Valve, Lift Check Valve, Nozzle Check Valve, Dual Plate Check Valve

Swing Check Valve H44
Pressure Seal Check Valve H44

Dual Plate check valve H76
Nozzle Check Valve GLH41

Design Features
- Lift check, swing check, dual plate
- Full bore or reduced bore
- Bolted bonnet or self-sealing bonnet
- Replaceable seat or integral seat
- Conical disc and flat faced disc
Specification
Design standard: API, ASME, EN, ISO, JIS, DIN, BS, GB
Pressure rating: CLASS 150LB~2500LB, 1.0MPa~42.0MPa, JIS 10K~40K
Size range: NPS1/2” ~60”, DN15~DN1500
Standard connections: flange, wafer, threaded, butt weld, socket weld

Samples

2. Pressure: 150LB
  Size: 1-1/2”
  Material: 904L
  Standard connection: Flange RF
  Applications: smelting
2. Pressure: 150LB
  Size: 4”
  Material: titanium Gr.2
  Standard connection: Wafer
  Applications: terephthalic acid PTA
2. Pressure: 150LB
  Size: 4”
  Material: CW6M
  Standard connection: Flange RF
  Applications: acetic acid transportation, alkylate
2. Pressure: 600LB
  Size: 1/2”
  Material: Zirconium 705
  Standard connection: Flange RF
  Applications: acetic acid transportation
2. Pressure: 900LB
  Size: 4”
  Material: CW12MW
  Standard connection: Flange RTJ
  Applications: cyclohexanone and caprolactam transportation
2. Pressure: 150LB
  Size: 12”
  Material: duplex stainless steel 4A
  Standard connection: Wafer
  Applications: seawater desalination