Globe Check Vs Swing Check | Global Valve and Controls

Global Valve and Controls

17Feb/120

Swing Check Vs. Piston Check

One of my customers had a RFQ for a Check valve, and wasn't sure if her customer was wanting a Piston or Swing. I tried to explain to her the difference in a piston check valve and a swing check valve and here is what I came up with.

My expert engineer explained that the clapper in the swing check valve, is attached to a hinge pin, and swings freely, so when pressure is being applied, it takes very, very, very minimal pressure to make the clapper move.

In a Piston Check – it takes more pressure because the movement is up and down. (Movement is vertical) – And is harder for the air to go through.

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