首页>
外国专利>
PILOT-OPERATED CHECK VALVE FOR HIGH-PRESSURE CONCENTRATED SEAWATER USABLE IN SEA-WATER REVERSE OSMOSIS PUMPING AND ENERGY RECOVERY SYSTEMS
PILOT-OPERATED CHECK VALVE FOR HIGH-PRESSURE CONCENTRATED SEAWATER USABLE IN SEA-WATER REVERSE OSMOSIS PUMPING AND ENERGY RECOVERY SYSTEMS
展开▼
机译：高压浓缩海水的先导控制单向阀，可用于海面反渗透泵和能量回收系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
A valve comprises a valve body (502) having an inlet (504), an outlet (506) and a main flow path (508) from the inlet (502) to the outlet (506). A valve piston (510) is moveable into and out of engagement with a valve seat (512) to block and unblock the main flow path (508). The valve piston (510) has a front face facing the inlet (502), a back face facing a chamber (516) within the valve body (502), and an orifice (514) providing fluid communication between the front face and the back face of the valve piston (510). When the valve piston (510) is engaged with the valve seat (512) the front face has a smaller area than the back face, such that fluid pressure in the inlet is communicated to the back face to urge the valve piston (510) into engagement with the valve seat (512). A pilot valve (520) is moveable between a closed position and an open position to block and unblock a pilot flow path between the chamber (516) within the valve body (502) and the outlet (506). The pilot flow path has a larger effective cross-sectional area than the orifice, such that when the pilot flow path is unblocked fluid pressure on the back face of the valve piston is reduced.
展开▼
