Propane regulator with a balanced valve

Fluid handling – Processes – Involving pressure control

Patent

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Details

1374848, 13750518, 13750537, G05D 1602

Patent

active

060794348

ABSTRACT:
The invention relates to a pressure regulator for propane and liquefied petroleum with a balanced valve. An inlet port (10) receives supply pressure and an outlet port (14) receives output pressure. A threaded shaft (28) engages a pocket in a spring button (20). A diaphragm assembly (22) engages the bottom of a range spring (24). A T-handle (26) is rotated to move the spring button (20) downward, compressing the range spring (24) which creates a net downward force on the diaphragm assembly (22). A valve mechanism (12) includes a supply seat (30), a supply valve (34), a balance piston (32), and a pintle interconnection (36). The supply valve (34) moves off of the supply seat (30) as the downward force is exerted on the diaphragm assembly (22), and supply pressure fills the outlet port (14). An aspirator tube (39) transfers supply pressure from the outlet port (14) to the diaphragm assembly (22) resulting in a net upward force on the diaphragm assembly (22) as a function of outlet pressure times diaphragm assembly (22) area. A balanced diaphragm (42) and an o-ring (44) create a redundant seal and prevent the effect of supply pressure on output pressure by equating the net upward and downward force on the valve mechanism (12) due to supply pressure. The o-ring (44) dampens unwanted valve (12) and diaphragm assembly (22) oscillation.

REFERENCES:
patent: 2599577 (1952-06-01), Norgren
patent: 2707966 (1955-05-01), Taplin
patent: 2890713 (1959-06-01), Semon
patent: 3643683 (1972-02-01), Semon
patent: 5381819 (1995-01-01), Gotthelf

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