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Automatic recirculation valve, also known as pump protection valve or minimum flow valve

Automatic recirculation valve, also known as pump protection valve or minimum flow valve

Automatic recirculation valve, also known as pump protection valve or small flow valve, is used for automatic recirculation of minimum flow in centrifugal pumps to prevent damage caused by overheating, noise, and vibration at low loads.

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Purpose and structural characteristics of air discharge check valve

Purpose and structural characteristics of air discharge check valve

The air discharge check valve is installed on the outlet pipeline of the high-pressure feed pump of the thermal power unit to prevent water backflow and protect the feed pump. This valve works in conjunction with the minimum flow automatic recirculation bypass valve of the water pump. When the feed pump is at low load or the outlet shut-off valve is closed, the automatic recirculation bypass valve (automatic recirculation valve) should be in the open position to ensure the safe operation of the water pump. When the air discharge check valve opens, the recirculation bypass valve automatically closes. It is not suitable for media containing solid particles and high viscosity.

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What are the types of valve seats and what is the typical process for a horseshoe shaped valve seat?

What are the types of valve seats and what is the typical process for a horseshoe shaped valve seat?

The valve seat is composed of inner and outer cylindrical surfaces, end planes, and threaded surfaces, and is a sleeve type component. There are four types of valve seats. According to the purpose of the valve, its seat is further divided into metal seat and non-metallic seat. The non-metallic valve seat has a simple structure and belongs to the annular valve seat.

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