Deluge Valve_Tubular Diaphragm, Elastomeric_Future Controls International

The FCI Model F100-43 Tubular Diaphragm Valveis a pressure operated,
in-line axial valve. A tube diaphragm actuates the valve, which is
comprised of three major components: 1) Tube 2) Barrier and 3) Body.
There is only one moving part in the valve the tube diaphragm.
There are no shafts, packing, stem guides or springs. The tube
diaphragm is a one piece, homogeneous nitrile rubber part which is
extremely durable. The ends of the tube are thick solid rubber, designed
to fit between flanges. This design eliminates the possibility of cutting
the tube diaphragm due to over tightening or piping misalignment during
installation.
The tube forms a drip tight seal around the barrier when the pressure is
equalized between the valve inlet and the control chamber. When
pressure is removed from the control chamber, the valve is open. The
minimum recommended operating pressure is 20 P.S.I. of inlet pressure.