Piston valve

Details Piston valve Piston valve

1998-03-19

1999-10-26

Walton, George L.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Liquid supplied at valve interface

738665, 137551, 251214, 251267, 251325, F16K 3150, F16K 102

Patent

active

059710071

ABSTRACT:
A piston valve for use in connection with the fire protection industry is disclosed which includes features for protecting against corrosion. A sacrificial zinc anode is mounted in the body of the valve under the handwheel. A polymeric piston is used which cannot corrode. A grease fitting protects against corrosion at the interface of the spindle and the valve body or bushing within the body.

REFERENCES:
patent: 677085 (1901-06-01), Johnson
patent: 984243 (1911-02-01), Schmid et al.
patent: 1001970 (1911-08-01), McCarthy
patent: 2062422 (1936-12-01), Meese
patent: 2358981 (1944-09-01), Lattner
patent: 3327992 (1967-06-01), Billeter et al.
patent: 3658291 (1972-04-01), Meges
patent: 3889925 (1975-06-01), Brooks
patent: 4406304 (1983-09-01), Vamvakas
patent: 4433827 (1984-02-01), Redmon et al.
patent: 4592534 (1986-06-01), Ueda et al.
patent: 5083743 (1992-01-01), Gordon et al.
patent: 5560392 (1996-10-01), Spang et al.

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