Pressure control unit

Details Pressure control unit Pressure control unit

1980-07-17

1982-04-20

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

303 6C, B60T 826

Patent

active

043254071

ABSTRACT:
Pressure control devices with a valve connected between an inlet chamber and an outlet chamber and a non-return valve operating as a by-pass are known. The non-return valve opens due to a reduction in pressure in the inlet chamber relative to the pressure in the outlet chamber against a closing force. This type of known pressure control devices are very expensive to manufacture and are not safe against failure and great erosion. According to the present invention a single arrangement providing the valve and the non-return valve comprises a tappet with a valve body fixed thereto to provide the operation of both valves. The valve body is essentially cylindrical and elastic and its outer surface is spaced from the inner surface of the outlet chamber. The outer surface of the valve body is armored in such a way that a deformation in the radial direction toward the inner surface of the outlet chamber is avoided.

REFERENCES:
patent: 3283504 (1966-11-01), Stelzer
patent: 3360004 (1967-12-01), Lewis et al.
patent: 3623776 (1971-11-01), Wellman
patent: 4113317 (1978-09-01), Farr

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