Fluid handling – Removable valve head and seat unit – Threaded into valve casing
Patent
1986-06-10
1988-04-19
Weakley, Harold W.
Fluid handling
Removable valve head and seat unit
Threaded into valve casing
13753331, 13761421, 13762531, 251293, F16K 2500
Patent
active
047382775
ABSTRACT:
A tap incorporating a tap body and a tap top assembly having an inner end in sealing engagement with the valve seat within the tap body and having a pair of ceramic discs in a housing within the tap top assembly for controlling fluid flow, and operable by a spindle. The control valve is received within a closure member, one end of which is externally threaded at so as to be screwed within an access opening to the tap body with the other end being internally threaded at to receive an externally threaded adjustment nut surrounding the spindle and cooperating with the control valve, whereby, when the tap top assembly is screwed into the tap body, the adjustment nut is operable to move said control means axially into tight engagement with the valve seat. The externally threaded adjustment nut carries a lock nut adapted to engage the closure member and lock the adjustment nut relative thereto. In one embodiment a non-return valve assembly, incorporating a jumper valve, is clipped to the end of the closure member upstream of the ceramic discs and in another embodiment a non-return jumper valve is received within a chamber downstream of the ceramic discs.
REFERENCES:
patent: 584897 (1897-06-01), Ryan
patent: 1379389 (1921-05-01), Brassington
patent: 1960970 (1934-05-01), Fina
patent: 2994343 (1961-08-01), Banks
patent: 3389717 (1968-06-01), Povalski
patent: 3472268 (1969-10-01), Sherwood
patent: 3582116 (1971-06-01), Young
Dorf Industries Pty. Ltd.
Weakley Harold W.
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