The Basic Control Valve 66 Globe and 66 Angle is a full port engineered valve, equipped with two diaphragm chambers, sealed from each other by the diaphragm, and isolated from the valve`s main flow passage by an intermediate plate. By pressurizing one control chamber while simultaneously venting the other, the valve is positively powered to both open and close.
A large majority of OCV control valves have a single diaphragm chamber and operate off line pressure; more specifically, off the pressure differential between the inlet and outlet ports of the valve. There are, however, conditions that do not lend themselves to such an operation. |
