概述
RVA 截止止回阀
GEA check valves open autonomously by the pressure that is exerted by the working medium upon the valve disc. 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, RVA 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 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 industrial heating and 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 stem sealing is provided by a threaded bush with spring-elastic PTFE ring.
技术特征
- 采用钢或不锈钢
- 根据德国 DIN EN12284、AD2000 系列 W 选择阀体材料
- 工作介质：符合EN 378-1的乙二醇基冷盐水制冷剂, 例如NH3、R22、R134a 以及与冷冻机油的混合物；中性、气体和液体介质；乙二醇基冷盐水
- 安装位置：水平，垂直（用于向上流动方向）
| RVA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 10-200 |
| 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 RVA
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GEA 洞察
Making milk production more sustainable for a growing world
The world's population is growing and with it demand for milk. Dairy is an essential component of many global diets. However, its production can be resource-intensive and impact the environment. GEA’s Christian Müller, Senior Director Sustainability Farm Technologies, sheds light on how technological innovations powered by GEA make milk production more efficient and profitable.
