Valve Standard:Conventional type anti-pollution cut off valve is
composed of two check valves in tandem connection.Safety type
anti-pollution cut off valve is to add a drainage and decompression
device to the secondary check valve system. In this case, even if
all the secondary check seals are broken together, it still can
function to prevent back flow. Therefore, it is a safety device to
prevent back flow pollution in pipeline of daily drinking water
system. Safety type anti-pollution cut off valve is composed of
secondary check valve and a drainage and decompression system. The
upper cavity connects with the inlet of first-stage non-return
system. The first and second stage check valve system mainly
consists of valve body, inlet connector, disc, gasket, spring, etc.
Drainage and decompression system mainly consists of valve bonnet,
diaphragm, gasket, outlet, spring and air block device. Suitable
MediumWater, Oil, Gas and etc.Main materialPN10--PN25CAST IRON,ASTM
A216 WCB, WCC, WC6, SS304, SS316, CF8, ETC.Suitable
Temperature≤80Nominal PressureNominal DiameterDN40--DN600Flange
DimensionASME B16.5, BS4504, ISO2531, ISO7005 and other standards
conforming to the requirementsFace to Face LengthAPI594,BS5155,
ISO5752, DIN3352 and other standards conforming to the
requirements /* March 10, 2023 17:59:20
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