Valve driving system

Details Valve driving system Valve driving system

1994-11-10

1996-09-03

Hepperle, Stephen M.

Fluid handling

Systems

Multi-way valve unit

25112905, 25112915, 335224, F16K 3106

Patent

active

055514804

ABSTRACT:
When the valve is closed, for example at normally-open type valve, the operating voltage applied to the electromagnet is initially set to the minimum operating voltage (6 V, for example), then raised to a voltage (12 V, for example) where sealing caused by contacting force between the valve body and the valve seat is ensured. The voltage is raised almost simultaneously with the contact of the valve body with the valve seat, or slightly earlier or later. Thus, when the valve is closed, the valve body speed when it reaches the valve seat is low, making the operational noise at valve closing smaller. Also, since the operating voltage of the electromagnet is raised later, sealing of the closed valve is ensured.

REFERENCES:
patent: 4726389 (1988-02-01), Minoura et al.

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