Plunger metering pump

1. Low price

2. The flow rate can reach 76 cubic meters per hour, the flow rate is within the range of 10% to 100%, the measurement accuracy can reach ± 1%, and the pressure can reach 350 megapascals. When the export pressure changes, the flow rate remains almost unchanged.

3. Can transport high viscosity media, not suitable for transporting corrosive slurries and hazardous chemicals.

4. The shaft seal is a packing seal with leakage, and the packing needs to be adjusted periodically. The packing and plunger are prone to wear and require pressure flushing and discharge of the packing ring.

5. No safety release device.

Mechanical diaphragm metering pump

1. The price is relatively low.

2. No dynamic seal, no leakage.

3. Capable of transporting high viscosity media, abrasive slurries, and hazardous chemicals.

4. The diaphragm is subjected to high stress and has a low lifespan.

5. The outlet pressure is below 2 megapascals, and the applicable range of flow is relatively small; The measurement accuracy is ± 5%, and the flow rate variation can reach 10%.

6. No safety release device.

 

Hydraulic diaphragm metering pump

1. No dynamic seal, no leakage, equipped with safety relief device, easy maintenance.

2. The pressure can reach 35 megapascals; The flow rate can reach a measurement accuracy of ± 1% within the range of 10:1; For every 6.9 megapascals increase in pressure, the flow rate decreases by 5% to 10%.

3. The price is relatively high.

4. Suitable for medium viscosity media.

Bellows metering pump

1. The price is relatively low.

2. No dynamic seal, no leakage. 3. Suitable for conveying vacuum, high temperature, and low temperature media, with outlet pressure below 0.4 megapascals and low measurement accuracy.