公开(公告)号：US3881505A

公开(公告)日：1975-05-06

申请号：US44796274

申请日：1974-03-04

Applicant: VAPOR CORP

Inventor： DUNKELIS EVALD

IPC: F16K17/10 ,  F16K11/02

CPC classification number: F16K17/10 ,  Y10T137/7036 ,  Y10T137/7762 ,  Y10T137/8663

Abstract: A pressure responsive pilot valve for operating a differential pressure main relief valve of the bellows or diaphragm type mounted on a tank, wherein the main relief valve includes a deadended bellows or diaphragm and the pilot valve is connected between the bellows or diaphragm and the tank to selectively connect the bellows or diaphragm to tank pressure and maintain the relief valve closed or to connect the bellows or diaphragm to atmosphere and allow the tank pressure to open the main relief valve and relieve pressure within the tank. The pilot valve includes a casing, a movable pallet assembly in the casing having a magnet pressure pallet mounted on one end of a plunger and a blowdown pallet mounted on the other end of the plunger, a seat defining a pressure port and a magnetic member coacting with the magnet pressure pallet, a seat defining a blowdown port coacting with the blowdown pallet, said pallets being mounted on the plunger so that when one is seated closing its respective port the other is unseated opening its respective ports, a pressure chamber defined between the pressure port and the respective end of the casing, a blowdown chamber defined between the blowdown port and the presective end of the casing, an intermediate chamber between the pressure and blowdown ports, and connection ports in the casing for each of the chambers.

Abstract translation: 一种用于操作安装在油箱上的波纹管或隔膜式差压主溢流阀的压力敏感先导阀，其中主安全阀包括死端波纹管或隔膜，并且先导阀连接在波纹管或隔膜和 罐选择性地将波纹管或隔膜连接到罐体压力并保持安全阀关闭或将波纹管或隔膜连接到大气中，并允许罐压力打开主安全阀并释放罐内的压力。 导向阀包括壳体，壳体中的可移动托盘组件，其具有安装在柱塞的一端上的磁压力托盘和安装在柱塞的另一端上的排放托盘，限定压力端口和磁性构件共同作用的座 通过磁体压力托板，限定与排污托盘共同作用的排污端口的座位，所述托盘安装在柱塞上，使得当一个座椅关闭其相应的端口时，另一个被卸下打开其相应的端口，压力室限定在 压力端口和壳体的相应端部，在排放口和壳体的前端之间限定的排污室，压力和排污口之间的中间室以及用于每个室的壳体中的连接口。