VALVE OF OIL-WELL SUCKER-ROD PUMP Russian patent published in 1994 - IPC

FIELD: pump engineering. SUBSTANCE: seat is combined and made of conjugated outer and inner rings. The outer ring is provided with a bore and the inner ring is provided with a cylindrical projection which enters the bore of the outer ring. A sealing member is received in the groove formed with face surface of the projection and face and cylindrical walls of the bore. Depth of the cylindrical bore of the outer ring is less than total altitude of the sealing member and length of the projection. Threaded bushing, which presses the rings, is received in the case. EFFECT: enhanced reliability. 1 dwg