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概述

RVAK 截止止回阀

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.

GEA AWP RVAK Stop Check Valve

Stop Check Valve type RVAK

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GEA 洞察

The breakthrough that changed spray drying

In 1976, NIRO engineers responded to a competitive challenge by rethinking what spray drying could do. Their idea became the multi-stage dryer MSD. Fifty years later, the same fundamental principle helps turn liquids into the powders used in essential nutrition products and important medicines around the world. Refined through decades of engineering expertise, customer insight and continuous development, MSD is a story of innovation with lasting impact.

Beyond the machine: unlocking better plant performance

超越机器:释放设备更佳性能

一台高效的机器并不一定能造就一家高效的工厂。真正的改进往往始于跳出单台设备的局限,去理解工艺流程、能源系统和运营决策之间是如何相互影响的。这是一种整体性方法,旨在挖掘原本可能被遗漏的机遇。

How a valve reshapes the way food and drinks are made

一种阀门如何重塑食品和饮料的制作方式

在食品和饮料工厂中,阀门通常使用压缩空气进行操作。GEA Hydract® Actuation Technology 则利用水在封闭的数字控制回路中驱动阀门。由此制成的阀门既能精确定位,又能以微调步长进行控制。这使得能耗降低,控制能力增强。

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