Plunger metering pump
1. The price is lower
2. The flow rate can reach 76 m3/hour, the flow rate is in the range of 10% to 100%, the measurement accuracy can reach ±1%, and the maximum pressure can reach 350 MPa. When the outlet pressure changes, the flow is almost constant.
3. It can transport high viscosity medium, not suitable for transporting corrosive slurry and dangerous chemicals.
4. The shaft seal is a packing seal, there is leakage, and the packing needs to be adjusted periodically. The packing and plunger are easy to wear, and the packing ring needs to be pressure flushed and drained.
5. No safety relief device.
mechanical diaphragm
1. The price is lower.
2. No dynamic seal, no leakage.
3. It can transport high viscosity medium, abrasive slurry and dangerous chemicals.
4. The diaphragm is subject to high stress, and the life of the diaphragm is low.
5. When the outlet pressure is below 2 MPa, the applicable range of flow rate is small; the measurement accuracy is ±5%, and when the pressure changes from the minimum to the maximum, the flow change can reach 10%.
6. No safety relief device.
Hydraulic Diaphragm
1. No dynamic seal, no leakage, with safety relief device, easy maintenance.
2. The pressure can reach 35 MPa; the flow rate is in the range of 10:1, and the measurement accuracy can reach ±1%; every time the pressure increases by 6.9 MPa, the flow rate decreases by 5% to 10%.
3, the price is higher.
4. Suitable for medium viscosity medium.
Bellows
1. The price is lower.
2. No dynamic seal, no leakage.
3. It is most suitable for conveying vacuum, high temperature and low temperature medium, the outlet pressure is below 0.4 MPa, and the measurement accuracy is low.
