Assertion: valve's body | /r/HasProperty | annular bushing
Facets:
Source sentences:
text: In a gate valve structure having a non-rising valve stem, an improved gate member comprising: a body having a valve stem receiving chamber closed at one end and open at the other end to the exterior of the gate member by a bore, an annular bushing having interior threads for threadedly receiving the non-rising valve stem, said annular bushing being fixedly supported in the bore ofsaid gate member, and a spiral groove co-axial of and extending from one end to the other end of said bushing across said interior threads for relieving pressure build-up inside the chamber and/or for discharging dirt and sludge from said threads.