Type WSOV valves are diaphragm operated shut off valves, which stop flow in pipelines on light tightening of the hand wheel.
Design
Tye WSOV is available in straightway pattern, with flare nuts for inch pipes.
The valve body, cover and spindle are made of brass and the handwheel (2) is of coloured plastics.
The valve has a triple diaphragm seal (5). Two diaphragms are made of a beryllium copper alloy, while the third is made of stainless steel.
The diaphragms are designed in such a way that their tension contributes to raise the valve plate from its seat when the valve is opened.
The valve plate itself is made of thermoplastics ensuring complete shut off when the hand wheel is tightened.
The trust shoe (4) prevents direct contact between spindle (3) and the diaphragms (5). This feature contributes to increased valve life.
The spring (6) can keep the valve open to operating pressures down to 30 in Hg. (76 cm Hg).
The counterseat in the cover prevents the ingress of moisture.
