About us
All automatic recirculation valve products can be designed, manufactured and processed according to GB, ANSI, API, JIS, DIN, BS and other standards.
Automatic recirculation valve, also known as pump protection valve or minimum flow valve or three-way return valve, is used for automatic recirculation of minimum flow of centrifugal pump to prevent damage caused by overheating, noise and vibration under low load. The automatic recirculation valve is self-operated and does not require external energy supply.
In addition to the production and sales of recirculation valve products, our company also produces and sells other valve products, dedicated to provide new and old users with high-quality products and services to ensure user satisfaction.
Hola Valve (Shanghai) Co., Ltd. has developed ZD series automatic recirculation pump protective valve through years of research and development, continuous innovation and practice. It is used to prevent all kinds of centrifugal pumps from being damaged due to overheating, serious noise, instability and cavitation when running below load.
Set R & D, production, sales, service in one of the domestic science and technology enterprises; It is equipped with more than 190 sets of mechanical equipment such as turning, planing, grinding, milling, drilling, welding and automatic spraying.
It is equipped with more than 60 sets of professional testing equipment such as material analysis, physical and chemical X-ray and ultrasonic flaw detector.
Valve research and development center, control valve measurement and control center, valve quality testing center;
Product center
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Product Principles
The automatic recirculation valve integrates the functions of check valve, flow sensing, bypass control valve, and multistage step-down in one. It does not require power source and control system, and does not require electrical wiring. The small spa···
The control circulation system is composed of check valve, flowmeter, minimum flow regulating valve and control system. The control circulation system provides minimum flow protection, and when the process flow is greater than the pump minimum flow, ···
The minimum required flow of the pump in a continuous circulation system is independent of the process flow of the system. After the minimum flow is set, it is directly returned to the storage tank through the depressurized orifice plate. Although th···
技术支持
Flow calculation of automatic recirculation valve
What are the benefits of automatic recirculation valves? And for the a···
Automatic recirculation valve (pump protection valve) performance
1, automatic recirculation control valve includes recirculation flow p···
Automatic recirculation control valve
The automatic recirculation valve includes a decompression facility fo···
Automatic circulating pump protection valve
1. OverviewIn order to meet the flow requirements of the process, the ···
Focus on automatic recirculation valve, control valve research and development, production and sales services
Contact: Mr. Chen
telephone：021-67893699
Cell phone：13501881998
mailbox：shhora@126.com
address：3767 Jiasong North Road, Jiading, Shanghai