概述
GEA check valves open autonomously by the pressure which is exerted by the working medium upon the valve disc. RVAK stop check valves have a lifting stem to permanently close the valve and a cone on the underside of the valve disc to regulate the medium flow. They start to open at a differential pressure of 0.01 to 0.05 bar and are fully open between 0.1 and 0.2 bar. As soon as the flow is interrupted or the flow direction is reversed, the valve closes automatically. Additionally, RVAK stop check valves may also be closed manually with a handwheel or a ratchet attached to the lifting stem. Rotating the stem clockwise will keep the valve disc down on the valve seat and therefore keeps the valve closed, counter-clockwise rotation will enable the valve disc to be opened by the pressure of the medium. The cone on the underside of the valve disc allows the medium flow to be regulated. The maximum diameter of the cone corresponds to the valve’s nominal diameter. The built-in damping device makes this type of valve especially suitable in cases where the power requirement / flow rate fluctuates. GEA stop check valves are designed for installation in the refrigerant circulation of industrial refrigeration systems. They are installed on either the pressure or suction side of compressors or in pipes in which only one direction of flow is intended. The spindle sealing is provided by a threaded bush with spring-elastic PTFE ring.
RVAK 截止止回阀 | |
设计 | 直线型或角型 |
材料 | 钢或不锈钢 |
标称尺寸 | DN 10-150 |
标称压力水平 | PS 25, PS 40, PS 63 |
温度范围 | -60 °C 至 +150 °C |
连接 | 对焊端 DIN, ANSI 法兰端 DIN, ANSI 焊接端 螺纹端 |
其他 | 盖板延长件 直线滚珠轴承 |
Stop Check Valve type RVAK
制冷系统的实用补充设备。氨干燥机可从制冷剂循环中除去水分,它与过滤器和放空气器一起成为氨制冷系统的完美补充。
PR-OLEO® 优质氨制冷润滑油是高度精制的 2 阶段氢化裂解润滑剂,采用专门配方制成,可在采用往复式压缩机或螺杆压缩机的氨制冷系统中使用。
Welcome to the world of simplicity with GEA Service Kits for reciprocating compressors. Our mission is clear - to make your experience with original spare parts seamless and your operations smoother than ever. "Take it easy, use a kit" is not just a tagline – it is a promise we deliver on.