Pressure relief valve assembly with plastic, one-piece valve

Details Pressure relief valve assembly with plastic, one-piece valve Pressure relief valve assembly with plastic, one-piece valve

1988-04-19

1990-06-19

Jones, W. Gary

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

210136, 210168, 210434, 210440, 1375121, 251368, B01D 2710

Patent

active

049351273

ABSTRACT:
A pressure relief valve assembly is described including a valve body having a sleeve portion, a slotted portion and axial extension legs, all of which are integrally formed as one-piece by injection molding from plastic. The legs are hooked at free ends to restrain a compression spring which biases a one-piece, plastic washer into a seated position over the slotted portion. The washer is substantially planar, but with inner and outer circumferential lips, each having a rounded profile. The lips are spaced apart by a medial planar surface area. The inner and outer lips engage inner and outer surfaces, respectively, around radial slots formed in the slotted portion which act as a valve seat. The washer also includes an upwardly extending projection opposite the sealing surface which receives the spring radially inward such that the spring exerts an even force on the washer. The washer is also provided with ribs which add structural support and act to distribute the load of the spring evenly from one side of the sealing surface to the other.

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