Valve manifold for a differential pressure transmitter

Details Valve manifold for a differential pressure transmitter Valve manifold for a differential pressure transmitter

1985-02-11

1986-07-29

Schwadron, Martin P.

Fluid handling

Systems

Plural noncommunicating flow paths

137597, 13762519, 73 4R, F16K 11087

Patent

active

046026576

ABSTRACT:
A valve manifold (18) between a main flow line (10) and a differential pressure transmitter (24) having a body (40) with a bore (48) in which three spherical ball valve members (72, 74, 76) are mounted for rotation among run, zero and calibration positions. A low pressure calibrating port (28) and a high pressure calibrating port (46) are controlled by calibration valve member (76). Low pressure calibrating port (28) is connected to a source of a predetermined low pressure calibrating fluid and high pressure calibrating fluid port (46) is connected to a source of a predetermined high pressure calibrating fluid to calibrate transmitter (24) between any desired low pressure and high pressure ranges. Low pressure calibrating port (28) and high pressure calibrating port (46) may be selectively connected to atmospheric pressure if desired and the calibrating fluids may be controlled from a remote control site (26).

REFERENCES:
patent: 2871881 (1959-02-01), Hewson
patent: 3108614 (1963-10-01), Navara
patent: 3381532 (1968-05-01), Tausch
patent: 3450157 (1969-06-01), Hewson
patent: 3596680 (1971-08-01), Adams
patent: 3894559 (1975-07-01), De Puy
patent: 4355659 (1982-10-01), Kelchner
patent: 4365563 (1982-12-01), Wu

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