What are the common faults of acid resistant pumps in Dalian? How to quickly solve it?

Dalian acid resistant pump, as a specialized equipment for transporting acidic media, plays an important role in industries such as chemical, metallurgical, electroplating, pharmaceutical, and environmental protection. By understanding the working principle, application areas, material selection, and selection guidelines of acid resistant pumps, one can better choose and use acid resistant pumps, ensuring the smooth progress of the process and the long-term stable operation of the equipment. In practical applications, suitable acid resistant pumps should be selected according to specific needs and conditions, and regular maintenance and upkeep should be carried out to extend the service life of the equipment and improve operational efficiency.

When selecting, it is necessary to clarify the type, concentration, temperature, viscosity, and other characteristics of the medium. For example, PTFE acid resistant pumps should be selected for transporting concentrated sulfuric acid, while PP or stainless steel acid resistant pumps can be selected for transporting low concentration acidic media. Determine the flow rate and head of the pump according to the process requirements. Flow rate refers to the volume of medium transported per unit time, and head refers to the height at which the pump can lift the medium. When selecting, it is necessary to ensure that the flow rate and head of the pump meet the process requirements.

What are the common faults of acid resistant pumps in Dalian? How to quickly solve it?

mechanical failure

Excessive vibration of the pump body

Reason: It may be due to misalignment between the pump shaft and motor shaft, unbalanced impeller, damaged bearings, loose anchor bolts, or unstable foundation.

Solution: Adjust the concentricity between the pump shaft and the motor shaft; Conduct dynamic balancing tests and adjustments on the blade wheel; Replace damaged bearings; Tighten the anchor bolts and reinforce the foundation.

Bearing overheating

Reasons: Oil shortage or poor oil quality of bearings, bearing wear, improper fit between pump shaft and bearings, excessive axial force, etc.

Solution: Supplement or replace lubricating oil; Replace worn bearings; Adjust the clearance between the pump shaft and the bearing; Check the impeller, balance plate and other components to eliminate excessive axial force.

Damaged impeller

Reason: Long term corrosion by acidic media, friction between impeller and pump casing, and solid particles in the conveying medium leading to wear, cavitation, etc.

Solution: Based on the damage to the impeller, choose to replace it; If it is a corrosion issue, consider replacing it with a more corrosion-resistant material; Optimize installation and operating conditions to reduce friction and cavitation.

seal failure

Mechanical seal leakage

Reasons: Wear, corrosion, deformation of the sealing surface, insufficient or broken spring elasticity, aging and damage of the sealing ring, improper installation, etc.

Solution: Replace worn, corroded, or deformed sealing surfaces; Replace the spring; Replace aging or damaged sealing rings; Reinstall the mechanical seal using the correct method.

Leakage of packing seal

Reason: Wear and aging of the packing, inadequate or uneven compression of the packing cover, wear or scratches on the shaft surface, etc.

Solution: Replace the packing; Adjust the packing gland to ensure even and appropriate clamping force; Repair or replace worn shafts.

Performance malfunction

Insufficient traffic

Reason: Impeller blockage, damage or corrosion, suction pipe blockage or leakage, low pump speed, inlet valve not fully open, etc.

Solution: Clean the impeller; Check and clean the suction pipe, repair the leak; Check the motor and transmission device to ensure that the pump reaches the rated speed; Fully open the inlet valve.

Insufficient head

Reason: Reverse rotation of impeller, excessive clearance between impeller and pump casing, inconsistent medium density with design, excessive pipeline resistance, etc.

Solution: Adjust the motor wiring to make the impeller rotate forward; Adjust the clearance between the impeller and the pump casing; Verify the density of the medium and reselect if necessary; Check the pipeline to reduce unnecessary resistance.

Excessive power

Reason: Excessive flow rate of the pump, increased viscosity of the medium, friction between the impeller and pump casing, motor failure, etc.

Solution: Close the outlet valve and control the flow rate; Check the properties of the medium, if the viscosity changes too much, consider replacing the appropriate pump; Check and adjust the clearance between the impeller and the pump casing; Check the motor and eliminate motor faults.

In the chemical production process, acidic media such as sulfuric acid, hydrochloric acid, nitric acid, etc. are common raw materials or intermediate products. Acid resistant pumps are used to transport these media to reaction vessels, storage tanks, or other equipment. In the process of metal smelting, acidic solutions are commonly used for cleaning and etching metal surfaces. Acid resistant pumps are used to transport these acidic solutions, ensuring the smooth progress of the process.

Centrifugal pump is a common type of acid resistant pump, which works by generating centrifugal force through the rotation of the impeller to transport the medium out. Centrifugal pumps have the advantages of simple structure, high flow rate, and easy maintenance, and are suitable for transporting low viscosity acidic media. The magnetic pump adopts a shaft seal free design, which transmits power through magnetic coupling to avoid the problem of medium leakage. Magnetic pumps are suitable for transporting highly corrosive, flammable, explosive, or toxic acidic media, and have high safety.