Submersible pumps are commonly used in various industrial and residential applications, but they often encounter several issues during operation, such as oil leakage, tripping, insufficient lift, non-rotating impellers, low flow, and low speed. Below is a detailed analysis of these common problems and their possible solutions:
1. **Low Speed and Insufficient Lift**
Some users notice that the pump's actual lift is lower than expected shortly after purchasing it. Upon checking, they find the motor running at a low speed. This issue may be caused by incorrect wiring, so it’s recommended to check and rewire the power lines if necessary. Another possibility is that the pump itself has a poor design or manufacturing defect, leading to reduced performance.
2. **Weak Water Output and Low Flow**
If the pump is not delivering enough water, check whether the rotor rotates smoothly when energized. If the rotor moves downward due to looseness between the shaft and bearing, it can reduce output power. To fix this, install an appropriate gasket between the rotor and bearing to raise the rotor position. After reassembly and testing, the issue should be resolved.
3. **Impeller Does Not Rotate with a Buzzing Sound**
When power is applied, the pump may produce a buzzing sound without the impeller rotating. Turn off the power and manually rotate the impeller at the inlet. If it doesn’t move, the rotor might be stuck. Disassemble the pump and check for damaged bearings or crushed balls that could be causing the rotor to jam. If the impeller turns manually but not when powered, the bearings may be worn out. Replacing the bearing assembly usually solves the problem.
4. **Oil Leakage**
Oil leakage is a common issue in submersible pumps, typically caused by severe wear on the seal box, resulting in oil chamber leaks or poor sealing at the outlet. If oil stains are visible on the water surface, or if water enters the oil chamber, the seal needs to be replaced immediately. If the cable root is leaking, it may indicate internal motor oil leakage, which could be due to poor sealing or faulty rewinding. In such cases, replace the seals and ensure proper insulation. Also, dry the motor using a 100–200W light bulb or in a drying room before reusing the pump.
5. **Leakage and Electrical Hazards**
Leakage is one of the most dangerous faults in submersible pumps, as it can lead to electric shocks or motor damage. If the residual current device (RCD) trips when the pump is turned on, it likely indicates moisture in the pump body, reducing the motor winding insulation resistance. Use a megohmmeter to test for leakage resistance. Long-term use can cause mechanical seal wear, allowing water to enter the motor. To fix this, dry the motor thoroughly and replace the mechanical seal before reinstalling the pump.
Regular maintenance and timely repairs are essential to ensure the safe and efficient operation of submersible pumps. Always follow manufacturer guidelines and consult a professional if unsure about any repair steps.
Water Solenoid Valve Armature Assembly
The category of armature assembly used in Water Solenoid Valve.
1. The tube OD sizes range from 5mm to 23mm, big than 23mm is also available
2. The valve seat orifice sizes ranges from 0.6mm to 4.0mm and higher for special applications.
3. Choose the suitable material for the application as Brando offers plunger tubes in brass and stainless steel.
4. Spring: Rustproof SUS304 stainless steel, with good performance of restore.
5. Seals: Options of NBR, HNBR, FKM, EPDM, PTFE, food grade materials, welcome your other requirements.
6. Shading ring: Cooper and silver material available.
7. Washer and retaining nut provided if has demands.
Water Solenoid Valve Armature, Water Solenoid Valve Plunger, Water Solenoid Valve Armature Plunger
NINGBO BRANDO HARDWARE CO.,LTD , https://www.brandopneumatic.com