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How do you repair a twin-screw pump when it malfunctions?
2024-02-03
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How do you repair a twin-screw pump when it malfunctions? Twin-screw pumps offer strong self-priming capability, can handle a wide range of fluid viscosities, operate without pulsation, and are resistant to shear. They are widely used in the petrochemical, marine, and pharmaceutical industries. During operation, failures are inevitable and require troubleshooting. Today, we will provide a detailed overview of the characteristics of twin-screw pumps.
1 The pump does not draw oil
If the suction line is blocked or leaking, inspect the suction piping and clear or seal the obstruction.
If the oil separator’s oil suction capacity exceeds the allowable suction lift, the suction lift should be reduced.
If the motor does not turn, the motor’s direction of rotation should be reversed.
If the medium’s viscosity is too high, heat the medium to reduce its viscosity.
2 The pressure gauge pointer fluctuates.
When there is a leak in the suction line, inspect the suction pipe.
If the safety valve is not properly adjusted or the operating pressure is too high, adjust the safety valve or reduce the operating pressure.
3 Traffic Decrease
If the suction line is blocked or leaking, inspect the suction line and clear any blockages or seal the leaks.
The threads and the interior of the coupling are severely worn; parts should be replaced promptly.
The motor speed is insufficient; the motor needs to be repaired or replaced.
If the safety valve spring is too loose, or if the valve seat and valve disc do not make tight contact, adjust the spring and grind the valve disc and valve seat.
If you have a problem with a twin-screw pump, knowing these seven common faults will help you fix it quickly.
The power of the 4-axis has increased significantly.
If the discharge pipe is blocked, stop the pump and clean the pipeline.
Severe wear inside the bolts and bearing shells; inspect or replace the relevant components.
If the dielectric viscosity is too high, it will cause the medium to heat up.
5 Pump vibration is high
The pump and motor are not concentric; realign them.
Inconsistent clearance between the spiral and bearing bush, resulting in uneven wear; adjust concentricity or clearance during maintenance.
The pump body is filled with gas; inspect the suction line and eliminate any leaks.
An excessively high installation height causes cavitation inside the pump; reduce the installation height or lower the rotational speed.
6 Pump Heating
Severe wear inside the pump housing; inspect the clearance between the screw and sleeve.
The mechanical seal drain hole is blocked; clear the drain hole.
The oil temperature is too high; reduce it appropriately.
7. The mechanical seal is leaking heavily.
Incorrect assembly position; please reinstall.
The gland follower is not seated evenly; adjust the gland follower.
Contact wear occurs on the sealing faces of the rotating and stationary rings; repair by grinding or replace with new parts.
If the dynamic and static seal rings are damaged, they should be replaced.
Contact Us
Service Hotline:
400-186-9661
Email:
Yel@zicionpumps.com
Company Address:
No. 26, Beilu Road, Yuewang Town, Shaxi Town, Taicang City, Suzhou, Jiangsu Province
Zichen Pump Industry (Jiangsu) Co., Ltd.
Service Hotline: 400-186-9661
Email: Yel@Zicionpumps.com
Company Address: No. 26, Beilu Road, Yuewang Town, Shaxi Town, Taicang City, Jiangsu Province
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