Mechanical diaphragm pump supplier

Price of precision metering pump

Precision metering pumps have relatively accurate metering, and the pump itself is equipped with a flow control device, which can achieve stepless speed regulation between zero flow and rated point. Precision metering pumps can be divided into plunger type precision metering pumps and diaphragm type precision metering pumps based on the structural form of the hydraulic end. Precision metering pumps are mainly single cylinder single acting reciprocating pumps, sometimes several cylinders are connected together to form multi cylinder precision metering pumps, but they have obvious differences from multi cylinder reciprocating pumps.

Product features of precision metering pumps:

1. Cast aluminum shell, high heat dissipation performance, light overall weight, suitable for various acid-base drugs, non-toxic and odorless.

2. Adopting a cam mechanism, there is no overall leakage and it can be placed on the medicine tank or pipeline.

3. The contact medium pump head is made of PVC, optional PTFE, and stainless steel materials.

4. High cost-effectiveness, widely applicable to the water treatment industry with low pressure requirements.

5. The flow rate can also be adjusted arbitrarily and the output can be quantified when the pump is running or stopped.

6. The diaphragm is made of multi-layer composite structure compression, with the first layer being ultra tough Teflon acid resistant film, the second layer being EPDM elastic rubber, the third layer being 3mm thick SUS304 supporting the iron core, the fourth layer being reinforced with reinforced nylon fibers, and the fifth layer being wrapped with EPDM elastic rubber * shoes, which can effectively improve the service life of the diaphragm.

There are several aspects that need to be noted for precision metering pumps:

1. Reasonable selection of energy storage devices:

Due to the fact that precision metering pumps are single cylinder single acting reciprocating pumps, the pulsation rate of their flow and pressurecompareTo eliminate pulsation, increase the stability of flow pressure, reduce pipeline vibration and its impact on process performance, it is generally recommended to install an accumulator with reduced pulsation at the discharge port of the reciprocating pump. Sometimes, in order to increase the suction performance of the suction port, an accumulator is also installed at the inlet. In terms of reducing pulsation, the larger the capacity of the accumulator, the better, but the larger it is, the less economical it is, so it should be controlled within a certain range. The selection of the volume of the accumulator for precision metering pumps generally follows: multiplying the metering capacity (mL) of each stroke by 26, the required pulse damper to reduce 90% pulsation can be obtainedcompareSmall volume (mL).

2. Flow regulation mechanism:

The flow regulation of precision metering pumps is achieved through the stroke adjustment mechanism at the pump power end (of course, flow regulation can also be achieved through variable frequency speed regulation). The travel adjustment mechanism has two methods: electric adjustment and manual adjustment. The core of these two methods is *. Electric adjustment is to add a set of electric adjusters on the basis of manual adjustment to replace manual operation. At present, there are generally several types of adjustment mechanisms in China, such as N-type shaft mechanism, bow wheel mechanism, slider mechanism, cam mechanism, etc. The use of flow control mechanisms is not limited by startup or shutdown, and should be locked after adjustment to prevent position drift caused by vibration and affect measurement accuracy. In general, a large stroke corresponds to a large rated flow rate, and a zero stroke corresponds to zero flow rate, with a linear relationship.

3. Three valve use of diaphragm pump:

The three valves of a diaphragm pump refer to the safety valve, relief valve, and oil replenishment valve, which are the core components of the hydraulic end of a precision metering pump. The correct use of the three valves is related to the normal operation and accuracy of the diaphragm precision metering pump. The safety valve is used to prevent excessive pressure inside the pump chamber to protect the safety of the pump and the device. Before leaving the factory, the pump manufacturer has set the popping pressure of the safety valve according to the rated discharge pressure of the pump. Generally, it does not need to be adjusted again during use. The oil replenishment valve is used to replenish the working medium in the hydraulic chamber, while the air release valve can discharge the gas in the working medium. It generally needs to be adjusted during use to prevent excessive oil replenishment or excessive oil release during air release.

Price of precision metering pump