Integral housing unit having a lockdown check valve and a pressu

Details Integral housing unit having a lockdown check valve and a pressu Integral housing unit having a lockdown check valve and a pressu

1999-04-07

2000-10-03

Freay, Charles G.

Pumps

With condition responsive pumped fluid control

Expansible chamber pump distributor operation modified

417307, 251 82, 251 83, F04B 4900

Patent

active

061264091

ABSTRACT:
A manifold assembly includes a housing unit which has a check valve assembly and a pressure relief valve assembly formed in one integral unit. When the check valve is in a closed position, the dispensing line is sealed off from the pumping assembly. In addition, the check valve also seals off the pressure relief outlet in the same movement, by the use of two O-rings placed on a lockdown member. Line maintenance tests may be performed accurately, as well as testing of the pumping assembly, when the check valve and pressure relief valve are closed. This structure provides an improved assembly since the check valve and pressure relief valve are formed in one integral unit so as to be adjacent one another so that both valves can be conveniently closed off at the same time during a maintenance check.

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