Home> Exhibition News> Why do imported metering pumps need to be equipped with a Needle Valve?

Why do imported metering pumps need to be equipped with a Needle Valve?

November 18, 2024
As we all know, metering pumps are mainly composed of three parts: power drive, fluid delivery and regulation control. The power drive device drives the fluid delivery diaphragm to achieve reciprocating motion through a mechanical linkage system. The diaphragm (piston) sucks the delivered fluid in the first half of the stroke and discharges the fluid from the pump head in the second half of the stroke.
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Therefore, changing the reciprocating frequency of the stroke or the stroke length of each reciprocating motion can achieve the purpose of adjusting the fluid delivery volume. Precise machining accuracy ensures the amount of each pump out and thus achieves precise metering of the delivered medium.
Nowadays, environmental protection is increasingly valued. Why are Universal Valve equipped on imported metering pumps or dosing pumps?
The Needle Valve plays a safety protection role in the system. If there is no Needle Valve, it may even cause an explosion. It can be automatically opened and closed according to the working pressure. It is generally installed on the equipment or pipeline of the closed system to protect the safety of the system.
When the pressure in the equipment or pipeline exceeds the specified value, the pressure relief is automatically opened to ensure that the pressure of the medium in the equipment and pipeline is within the specified value to prevent accidents. When the system pressure exceeds the specified value, the Needle Valve automatically opens to discharge part of the gas in the system into the atmosphere so that the system pressure does not exceed the allowable value, thereby ensuring that the system does not cause accidents due to excessive pressure.
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