Back-seating system and stop for valve operator - enables use of narrow dia. stem rising only short distance at end of valve travel

The gate valve has a backseat which is made up only when the normally non-rising operator stem is permitted to rise a short distance. A smaller-dia. stem may be used than one which is of sufficient area where it passes through the stem packing to cause the internal pressure within the valve cavity t...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	JOHN KENT MCGEE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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