Valve arrangement for venting conduits and pumping system including the same
AssigneePumpenfabrik Urach
InventorNabil Hanafi
Life of this patent
Estimating the term…
Abstract
A valve arrangement for venting conduits in pumping systems having several pumping units for delivering a gas or vapor generating liquid includes a double-seat valve in which the valving element moves between two extreme closing positions and an intermediate position in which the venting conduit is momentarily open; as the venting conduit is connected at one end with the gas collecting zone in one pumping unit and at the opposite end with the liquid discharging zone below the delivery valve so that the double seat valve is automatically controlled by the pressure difference resulting due to different operational phases of the pumping system.
Claims14
A pumping system for delivering a liquid developing gas or vapor, comprising a plurality of pump units each having a reciprocating pumping element operating at different phases, a working space formed with a gas or vapor collecting zone and a liquid discharging zone, a suction conduit with a suction valve, a pressure conduit with a delivery valve which is arranged in the liquid discharge zone, a venting conduit connected between the gas and vapor collecting zone of one pump unit and the liquid discharge zone of the subsequent pump unit, and a valve arrangement provided in each venting conduit for controlling the discharge of the gas or vapor from the collecting zone in response to the pressure difference between said working spaces.
Dependencies are inferred from the claim text.