|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 13 인용 특허 : 9|
A pilot operator and a relief valve are provided in the same housing. The pilot-operating mechanism is contained partially within the main closure element of the valve and partially within the valve cap. Inlet pressure to the valve is communicated to the pilot via an access passage extending through the main closure element. In response to high-pressure flow from the inlet, a pilot piston moves a spacer rod through the passage and into engagement with a spring-loaded vent closure. The piston-induced movement of the rod opens the vent to relieve the press...
[ What is claimed is:] [1.] A pilot-operated relief valve for relieving pressure from a vessel, comprising:an axially extending main valve closure element movable axially between closed and open positions for respectively closing and opening a discharge path from said vessel, said main valve closure element having a first pressure-responsive seal area at its first axial end selectively sealing said path communicating with said vessel and a second pressure-responsive seal area at its second axial end selectively communicating with a control dome area wher...