초록 ▼

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

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).

대표청구항 ▼

A valve manifold adapted to be positioned between a main flow line in which a differential fluid pressure is to be measured and a differential pressure transmitter to control fluid flow through high and low pressure lines from the main flow line to the transmitter comprising: a body having a central

A valve manifold adapted to be positioned between a main flow line in which a differential fluid pressure is to be measured and a differential pressure transmitter to control fluid flow through high and low pressure lines from the main flow line to the transmitter comprising: a body having a central main bore therein; a pair of inlet ports communicating with said main bore and connected to high and low pressure lines from the main flow line to provide a low pressure inlet port and a high pressure inlet port; a pair of outlet ports communicating with said main bore and connected to high and low pressure lines to said differential pressure transmitter to provide a low pressure outlet port and a high pressure outlet port; a stem mounted within said bore having an end thereof extending outwardly from said body; means to rotate said stem among three rotational settings including a run position setting, a zero position setting, and a calibration position setting; three separate valve members mounted within said bore and operatively connected to said stem for movement in response to the rotation of the stem among said three settings, one of said separate valve members being a low pressure valve member permitting direct fluid communication between the low pressure inlet and outlet ports in the run position setting to provide low fluid pressure directly from the flow line to the transmitter, and blocking direct fluid communication between the low pressure inlet and outlet ports in the zero and calibration settings; a second of said separate valve members being a high pressure valve member permitting direct fluid communication between the high pressure inlet and outlet ports in the run position setting to provide high fluid pressure directly from the flow line to the transmitter, and blocking direct fluid communication between the high pressure inlet and outlet ports in the zero and calibration settings; a calibration inlet port in said body adapted to be selectively connected to a predetermined calibration fluid pressure for calibration of the transmitter to a predetermined high pressure amount; and a third of said separate valve members being a calibration valve member permitting fluid communication between the calibration inlet port and the high pressure outlet port in the calibration setting for calibration of the transmitter at a predetermined high amount, and blocking fluid communication between the calibration inlet port and the high pressure outlet port in the run position setting.