Restrictor valve for a metered liquid dispensing system

Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line

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Details

137550, 137554, F16K 1506, F16K 3700

Patent

active

052340171

ABSTRACT:
A restrictor valve functions as an outlet valve in a metered liquid dispensing system and utilizes a spring biased, shiftable anti-siphon check valve to prevent fluid flow back from the receiving tank into the system. The restrictor valve is attached to the delivery end of the system discharge hose. The dispensing system is controlled by a central electronic unit and the restrictor valve includes a sensing unit for signalling the electronic control when liquid is present at the outlet. The restrictor valve is connected to the receiving tank by a low spill coupling to minimize escape of the liquid into the environment. The restrictor valve may also include a vacuum breaker valve which admits air into the discharge hose when the system pump is run in reverse to remove the prime from the discharge hose.

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patent: 4827538 (1989-05-01), Heimann et al.
patent: 4986304 (1991-01-01), Vanderjagt
patent: 4986782 (1991-01-01), Severtson

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