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Valves to maintain a constant differential oil pressure between oil pump and oil separator.

ORVA OIL-PRESSURE REGULATING VALVES

GEA oil-pressure regulating valves are designed for controlling the oil pressure in the oil circuit of screw-type refrigerant compressors. They comply with the technical regulations of the German Technical Control Board (TÜV). They are mechanically operated regulating devices to maintain a constant differential pressure. Their functionality also considers extreme conditions such as the starting phase of the compressor. The valves are of angle-type design with welding or flanged ends. They mainly consist of a forge body with the connections welded onto it, a tight piston, stem, cover, spring and cap. The oil pressure control valve is located in a bypass between oil pump outlet and oil separator. The amount of oil fed to the compressor varies depending on operational conditions. However it is always less than the amount of oil that is being supplied by the oil pump. The excess amount of oil is being recirculated via the bypass to the oil separator. The oil pressure control valve which is located in that bypass keeps the differential pressure between oil pump outlet and oil separator at an almost constant level. If the oil flow rate to the compressor drops, this differential pressure will increase and cause a further opening the oil pressure control valve. If the oil flow rate to the compressor increases, the oil pressure control valve will close to the point where the differential pressure which has been set at the oil separator is re-established. Regulating the differential oil pressure between oil pump outlet and oil separator enables a simple and constant oil supply to the screw compressor throughout all operating conditions. The sealing at the valve seat is provided by an o-ring seal. After the valve seat has been pressed into the seal up to a pre-defined depth, it collides with the metallic edge of the tight piston.

GEA AWP ORVA Oil Management Valve

Oil Management Valve type ORVA

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GEA 洞察

改变喷雾干燥技术的突破

1976 年,NIRO 的工程师为应对市场竞争的挑战,重新思考了喷雾干燥技术的应用潜力。他们的构想最终催生了多级干燥机 MSD。五十年后,这一基本原理依然在帮助将液体转化为粉末,这些粉末用于全球各地的必需营养品和重要药品中。凭借数十年的工程专业知识、对客户需求的深刻洞察以及持续的研发,MSD 书写了一段影响深远的创新篇章。

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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