Relief valve

Details Relief valve Relief valve

1989-12-11

1991-09-24

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

1374925, F16K 3138

Patent

active

050506358

ABSTRACT:
In a relief valve of the type including a main valve unit incorporating a main valve member (poppet) adapted for engagement with a cylindrical member and a pilot valve unit for controlling a fluid pressure whereby an inlet port of the main valve unit is communicated with a control chamber of the pilot valve unit by an internal pilot passage through a choke formed in a seat member of the pilot valve unit, the choke is formed with an expanded portion having a closed end and through holes for directly communicating the expanded portion with the internal pilot passage and/or the cylindrical member is composed of a unitary-construction member formed with a plurality of flow paths communicated with one another.

REFERENCES:
patent: 2930398 (1960-03-01), Barrett
patent: 3107688 (1963-10-01), Caslow
patent: 3373763 (1968-03-01), Smilges

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