Valves and valve actuation – Balanced valves – Rotary
Patent
1985-09-09
1986-09-30
Chambers, A. Michael
Valves and valve actuation
Balanced valves
Rotary
251309, 13761417, F16K 502, F16K 516
Patent
active
046143300
ABSTRACT:
A non-locking tapered plug valve is provided which prevents taper locking of the plug member by ensuring against pressure responsive plug movement toward the small extremity thereof due to positive or negative hydraulic pressure transients. The chambers at each axial extremity of the plug member are of such volumetric relation during positive pressure transients that the chamber at the small extremity of the plug reaches equilibrium with flow passage pressure before the chamber at the large extremity of the plug member thus ensuring that any pressure responsive resultant force acting on the plug member is directed toward its large extremity. To avoid taper locking during a negative pressure transient, an equalization passage with a check valve is provided to permit unidirectional flow from the large extremity of the valve chamber to the main flow passage. This allows a quicker equalization of pressure between the large extremity of the valve chambers with line pressure, whereas the higher pressure in the small extremity of the valve chamber creates a force on the plug member away from the taper locking direction.
REFERENCES:
patent: 619594 (1899-02-01), Martin
patent: 2045113 (1936-06-01), Ward
patent: 2954961 (1960-10-01), Stogner et al.
patent: 3115151 (1963-12-01), Manor et al.
patent: 4034776 (1977-07-01), Eshgly
patent: 4135544 (1979-01-01), MacLeod
patent: 4174092 (1979-11-01), MacLeod
Horst Clemens L.
Kalsi Manmohan S.
Chambers A. Michael
Empresas Lanzagorta, S.A. de C.V.
Fox John C.
LandOfFree
Non-locking tapered plug valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-locking tapered plug valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-locking tapered plug valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-980497