Fluid flow control device

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:6023930

Bailey, D F; Morrison, Jr, W F

This patent describes a fluid flow control device operable in a gas purge mode, liquid flow mode or backflow restriction mode for use with a fluid circulating system including a pump to selectively control the direction of fluid flow through the fluid circulating system. The fluid flow control device comprises: a valve body including a lower fluid chamber and an upper float chamber formed therein and a float movable disposed within the upper float chamber to control the direction of fluid flow through the fluid flow control device. The valve body includes a gas outlet, a fluid outlet, a liquid outlet and a fluid inlet operatively coupled to the outlet of the pump such that fluid entering the upper float chamber when the pump is operating, controls the position of the float therein to cause gas to flow through the gas outlet when in the gas purge mode and liquid to flow through the fluid outlet when in the liquid flow mode and when the pump is not operating, prevent backflow of gas or liquid through the fluid outlet when in the backflow restriction mode and a gas outlet seat and a fluid backflow seat formed adjacent the gas outlet and the fluid outlet respectively to selectively receive the float to prevent flow respectively therethrough when the fluid flow control device is in the liquid flow mode and the backflow restriction mode respectively whereby gas is purged from the pump.

• Assignee: Hollister, Inc., Libertyville, IL (USA)
• Patent Number(s): US 4981154; A
• Application Number: PPN: US 7-472366
• OSTI ID: 6023930
• Resource Relation: Patent File Date: 30 Jan 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
VALVES
DESIGN
CIRCULATING SYSTEMS
NATURAL GAS
PETROLEUM
PUMPS
TRANSPORT
TWO-PHASE FLOW
CONTROL EQUIPMENT
ENERGY SOURCES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
022000* - Petroleum- Transport
Handling
& Storage
032000 - Natural Gas- Transport
Handling
& Storage