First out pneumatic indicator valve

Details First out pneumatic indicator valve First out pneumatic indicator valve

1988-05-31

1989-07-18

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Fluid pressure responsive indicator, recorder or alarm

13762566, 137552, F16K 3700

Patent

active

048483990

ABSTRACT:
The apparatus of the present invention relates to a first out indicator valve having a main body portion, with a flow bore longitudinally through the body; an inlet port, an exhaust port through the walls of the body and fluid communication with the longitudinal flow bore; a pilot port of the lower portion of the valve in fluid communication with the longitudinal bore, and a stem movable within the longitudinal bore from a first position blocking fluid communication between the inlet and exhaust port and a second position allowing communication between the inlet and exhaust ports.

REFERENCES:
patent: 4121615 (1978-10-01), Bergeron
patent: 4442860 (1984-04-01), Taylor
patent: 4470367 (1984-09-01), Bergeron
patent: 4559970 (1985-12-01), Taylor et al.
patent: 4660600 (1987-04-01), Bergeron

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