Valve-positioning apparatus

Details Valve-positioning apparatus Valve-positioning apparatus

F - Mech Eng,Light,Heat,Weapons

15

B

137/84

F15B 13/043 (2006.01)

Patent

CA 1056259

VALVE-POSITIONING APPARATUS ABSTRACT OF THE DISCLOSURE Valve-positioning apparatus especially adapted for use with fluid-operated spool valves for positioning the spool member of such a valve in a predetermined position whenever the valve is not operating such as upon installa- tion or during shutdown. In the preferred embodiment, the positioning apparatus includes a piston member normally held out of contact with the spool by fluid pressure but urged into contact with the spool to position the spool when fluid pressure fails or is absent. The positioning apparatus may be used on either or both ends of the spool valve. -1-

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