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 The
Model 760-03 Non-Slam Check Valve is a hydraulically
operated valve designed to open and close drip-tight in response
to the differences in inlet and outlet pressures. It is a pilot
controlled, hydraulically operated, diaphragm actuated globe
valve in either the oblique (Y) or angle pattern design.
The Model 760-03 Non-Slam Check Valve operates independently
of valve differential pressure. The double chambered diaphragm
actuator always has full differential pressure to develop maximum
power and immediate reaction. In normal conditions and flow
where upstream pressure exceeds downstream pressure, the upstream
pressure is applied to the lower control chamber through a one
way needle.
This opening force coupled with the opening pressure exerted
on the seal disk by the normal flow causes the valve to open.
If pressure conditions reverse and downstream pressure exceeds
the upstream pressure, this greater downstream pressure is applied
to the upper control chamber through a one way needle valve.
This closing force along with the closing force being applied
to the seal disk by the reversed flow and the actuator spring,
causes the valve to positively close and seal drip tight. The
lower chamber provides cushioning for a smooth non-slam closing
operation and both the opening and closing speeds can be adjusted
by the needle valves.
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Valve Line Up
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