Dosing metering pump, also known as quantitative pump or proportional pump, is a special volumetric pump with the advantages of high precision, stability and reliability. The following is a detailed answer about metering pumps:

 

1. Definition and characteristics

 

Definition: A metering pump is a device that can meet various strict process requirements, and the flow rate can be adjusted steplessly within the range of 0-100%, used to transport liquids (especially corrosive liquids).

 

Features: The metering pump can maintain a constant flow rate that is independent of the discharge pressure, and can simultaneously complete the functions of transportation, metering and regulation, thereby simplifying the production process.

 

2. Working principle

 

The working principle of the metering pump is that the motor drives the worm through the coupling and reduces the speed of the worm gear to make the main shaft and the eccentric wheel rotate, and the eccentric wheel drives the sliding adjustment seat of the bow-shaped connecting rod to reciprocate. When the plunger moves to the rear dead point, a vacuum is gradually formed in the pump chamber, the suction valve opens, and the liquid is sucked in; when the plunger moves to the front dead point, the suction valve is closed, the discharge valve opens, and the liquid is discharged when the plunger moves further. By adjusting the eccentric distance of the eccentric wheel or the stroke of the plunger, the flow rate of the pump can be easily changed.

 

III. Classification

 

Metering pumps can be classified according to different standards, such as:

 

According to the flow-through part: plunger, piston type; mechanical diaphragm type; hydraulic diaphragm type.

 

According to the drive mode: motor drive; electromagnetic drive.

 

According to the working mode: reciprocating; rotary; gear type.

According to the pump characteristics: extra-large base; large base; medium base; small base; micro base.

 

IV. Application field

 

Metering pumps are widely used in the following fields:

 

Chemical industry: used for flow measurement and control of various chemical substances such as acids, alkalis, chlorides, amines, solvents, etc.

 

Petroleum: oil well water injection, oil production analysis, mud treatment in crude oil drilling projects, etc.

 

Food: beverages, alcohol, dairy products, fruit juice and beverage concentrate production fields.

 

V. Selection and installation

 

When selecting, it is necessary to consider factors such as pressure, flow, pump head (hydraulic end) material, and accuracy level. Before installation, it is necessary to carry out inspection and preparation work before the pump is put into operation, such as checking whether the bolts at each connection are tightened, whether the machine feet are adjusted flat, and whether the motor circuit is connected to the corresponding grid power.

 

If you want to know the selection and quotation of metering pumps, please consult CIXIFM winny:

Email:sales01@cxflowmeter.com

whatsapp:008618049841995