What influencing factors must be considered when measuring liquid at the pump head? The main factors to consider are the viscosity, specific gravity, vapor pressure, and temperature of the liquid.

As an ideal equipment for fluid precision measurement and dosing, metering pumps are now widely used in various fields including pharmaceuticals, food and beverage, and petrochemical industries. They are responsible for the metering and dosing of highly corrosive, toxic, highly viscous, and high-pressure media in the process.

*The metering pump mainly consists of three parts: power drive, fluid delivery, and regulation control. The power drive device drives the fluid delivery diaphragm (piston) to achieve reciprocating motion through a mechanical linkage system:

The diaphragm (piston) will be sucked in by the conveying fluid in the first half of the stroke and discharged from the pump head in the second half; Therefore, changing the reciprocating frequency of the stroke or the stroke length of each reciprocating motion can achieve the goal of adjusting the fluid delivery volume. The precise machining accuracy ensures the precise measurement of the conveyed medium by pumping out each time.

Due to their different power drive and fluid delivery methods, metering pumps can be roughly divided into two types: plunger type and diaphragm type.

When it comes to metering pump heads, the usual problem occurs when metering acid, chlorine, fluoride, and hydrogen peroxide. Due to differences in drug concentration and operating temperature, it is difficult to determine the specific material of the pump head. When measuring fluoride, we recommend using Viton? Sealed PVC pump head. For most chlorination applications, EPDM sealed NP (organic glass) pump heads are selected. For the measurement of hydrogen peroxide mixture, only PTFE sealed PTFE pump heads or stainless steel pump heads can be used. The measurement of concentrated hydrochloric acid usually uses Viton? Sealed organic glass pump head. The measurement of concentrated sulfuric acid can choose PTFE sealed PTFE pump heads.