Common mistake and solutions of back pressure valve
Common mistake and solutions of back pressure valve
Automatic Recirculation Valve
What is the working principle of the automatic recirculation valve?
Working Principle A minimum flow valve, also known as the automatic recirculation valve, is a pump protection valve installed at the outlet of the feedwater pump to prevent the feedwater pump from being damaged due to overheating, severe noise, instability, and cavitation when the feedwater pump is running under load. …
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Mr.Naoki Sawamur visits Datian Valve factory
On November 14, 2019, the famous Japanese valve manufacturer sawamura Valve Co., Ltd. and its president, Mr. Naoki sawamura, came to our company for inspection. Mr. Yu Chengshan, chairman of the company, warmly welcomed the arrival of Naoki sawamura, accompanied Naoki sawamura to conduct a comprehensive inspection and understanding of the company’s …
What Is A Centrifugal Pump Minimum Flow Bypass Line?
Centrifugal pumps rely on fluid to keep cool and lubricated while operating. They also rely on the fact that discharged fluid has somewhere to go. But what if the process dictates it needs only a fraction of the pump’s minimum flow requirement? What if there’s a closed valve downstream? What …
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Pump Run Out Protection
Normally pump protection valves are limited to minimum flow protection; however, severe damage can occur to the pump and driver by exceeding the intended operating range of the pump. Damage due to excessive flow can be eliminated by designing a “Maxi-Flow” as an addition to the standard minimum flow valve. Excessive …
Automatic Recirculation Valves Start-Up
Automatic recirculation valves Before start-up all lines must be flushed and the medium must be free from solids. Our valves are not designed to handle these. The lifetime of the valves will be strongly reduced due to increased wear when the fluid handled contains solids. If the lines are not …
Automatic Recirculation Valves Installation
The DATIAN automatic recirculation valves are best installed directly on the outlet of the pumps for which they are meant. The valve layout is mainly based on the pump curve. Ensure that the valves are installed on the right pumps. The flow direction is indicated on the valve nameplate. This nameplate …
Precautions when using back pressure valve
Avoid resonance with the system. When used with a pulsation damper, the pulsation damper should be placed between the pump and the backpressure valve to absorb the peak flow between the pump and the backpressure valve. Slow down the wear rate of the backpressure valve. For outdoor use, a protective …
How to install the automatic recirculation valve
The automatic recirculation valve is mainly installed at the outlet of the centrifugal pump. When the centrifugal pump outlet flow is lower than the minimum flow, the pump protection valve is bypassed, and the minimum flow of the pump design is bypassed to the pump suction device to avoid centrifugation. …
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3 Way Auto-reflux Valve Application and Features
There are many types of auto-reflux valves. The 3-way auto-reflux valve we have today has three ports, one in and two out, (left in, right and bottom). Unlike ordinary valves, there is an outlet at the bottom, when the internal spool is in different positions. When the outlet is different, for example, when …
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