Double Flapper Check Valve
The specifications of double flapper check valve
Industrial Applications: Petroleum, Chemical, Paper Making, Fertilizer, Coal Mining,Water treatment And Etc.
Butt-Clamped Type Double Petal Check Valve uses butt-installation and is used in the pipeline or on the pump outlet to, as a safety device, prevents the pump from inversed running due to the different water hammer’s shock caused by the medium’s back-flow in the pipeline when the pump stops. And it features by small volume, light weight, easy installation and maintenance, set with a guide device, flexible and quick close, preventing of huge medium’s back-flow differential and forming silencing effect. Suitable for the pipeline of water supply and drainage, warming etc. or the pump outlet to prevent both pump and pipeline from being damaged due to the medium’s back-flow and water hammer’s shock.
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What material we have for double flapper check valve
Pressure and Temperature ratings:
PN10 / PN16
Shell: 1.5 times rated pressure,
Seat: 1.1 times rated pressure.
-10°C to 80°C (NBR)
-10°C to 120°C (EPDM)
Water, sewage etc.
Cast iron / Ductile Iron/Carbon steel/ stianless steel
Ductile Iron + EPDM, stainless steel
NBR / EPDM
This kind of check valve is mainly used for systems in the industries of petroleum, chemistry, textile, paper- making, water supply and drainage, metallurgy, energy etc.
Drawings and dimension of check valve
FEATURES & BENEFITS OFDOUBLE FLAPPER CHECK VALVE
Double door wafer check valves permit flow in one direction only and close automatically if flow reverses.
They are entirely automatic in action,depending upon pressure and velocity of flow to perform the functions of opening and closing.
Check Valves offer greater flexibility and low cost in most piping systems and moreover , of its light weight , it is so convenient to install and has smaller face to face dimension than conventional swing check valve .
These valves can be supplied to match the international standards of flange (DIN,ANSI,JIS & BS) .
The Casting Technology of valves