Pumps – With condition responsive pumped fluid control – Inlet throttle or stop valve
Patent
1978-08-18
1980-07-15
Gluck, Richard E.
Pumps
With condition responsive pumped fluid control
Inlet throttle or stop valve
417303, F04C 2910
Patent
active
042125995
ABSTRACT:
A method of regulating the output quantity of compressed medium of single and multi-stage screw and turbo compressor systems, comprises, throttling the suction to the compressor systems with a throttling valve by fluid-pressure operation of the valve, sensing the pressure of the discharge of the compressor systems, closing the throttle valve in accordance with the pressure which is sensed and bleeding the medium after it is passed through the compressors and in a proportion to the pressure which is sensed and only after the throttling valve is moved through a proportional closing movement. The device for operating the compressor systems for regulating the quantity of medium includes a throttle valve in the suction having a valve member movable between opened and closed positions and with a control piston connected to the throttle valve to shift the valve member. A bleed valve has a passage connected to the discharge at one end and to the atmosphere at its opposite end, with valve seats in the passage closable by valve means which are connected to the control piston and movable in the passage toward and away from the valve seat means for opening and closing the passage. The valve and the valve seat means provide a lost motion connection to the control piston so that the control piston is movable to move the valve means in an opening direction to open the passage only after the throttle is moved in a closing direction to take up the lost motion connection.
REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 1519995 (1924-12-01), Wineman
patent: 3043495 (1962-07-01), Hewitt
patent: 3226011 (1965-12-01), Gustafson
patent: 3961862 (1976-06-01), Enstron et al.
Gluck Richard E.
Gutehoffnungshutte Sterkrade Aktiengesellschaft
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