Question 1

What are the points to remember while selecting a Clear Water pump?

Accepted Answer

Ensure the water is mostly clean without solids. Calculate actual working head considering static head, gradient and pipe losses. Use the correct pipe size and type for required flow. Check pH is not acidic or alkaline, liquid temperature is ambient, and whether the pump is needed for intermittent or continuous duty.

Question 2

What are the points to remember while selecting a Dewatering pump?

Accepted Answer

Check whether a fixed or portable installation is required. Select a pump offering better efficiency and reliability since cost per litre pumped matters. Recheck head as dewatering sites usually have low head. Ensure inbuilt protection against dry running, mechanical jamming or overloading, and select pumps offering low minimum submergence.

Question 3

What are the points to remember while selecting Waste Water or Non-clog pumps?

Accepted Answer

Calculate actual working head considering static head, gradient and pipe losses. Check pH, liquid temperature, minimum submergence and RPM requirements. Confirm intermittent or continuous duty and fixed or portable installation. Select pumps with solid handling suitable for the application, and use proper screening for heavy sewage to avoid jamming.

Question 4

What are the points to remember while selecting Slurry pumps?

Accepted Answer

Calculate actual working head, check pH, liquid temperature and specific gravity of the liquid. Consider minimum submergence and RPM requirements, plus intermittent or continuous duty. Select pumps with solid handling suitable for the application, and use proper jetting arrangements for high concentration slurry.

Question 5

What are general applications of clear water pumps?

Accepted Answer

Clear water pumps are used for pumping water from underground to overhead tanks in housing and commercial complexes, hotels and hospitals, fountains, waterfalls, landscaping, agriculture and irrigation, village and municipal water supply, river water pumping, and fire fighting.

Question 6

What are general applications of Dewatering pumps?

Accepted Answer

Dewatering pumps are used for basement and storm water dewatering, pumping contaminated water with sand and sludge at construction sites, sea water pumping, industrial water dewatering, civil infrastructure and tunnelling projects, flood relief pumping, and mines dewatering.

Question 7

What are general applications of Non-clog pumps?

Accepted Answer

Non-clog pumps are used for raw and unscreened sewage, industrial wastes and effluents, municipal sewer lines, tailing ponds, sewage treatment plants, effluent treatment plants, pharmaceutical units and textile units.

Question 8

What are general applications of Slurry pumps?

Accepted Answer

Slurry pumps are used for highly abrasive slurries, mill scale, iron ore and pellet slurry, mineral ore processing units, ash and coal handling plants, granite and marble slurry, jack well and intake well cleaning, and removal of sand deposition at dam galleries and penstock tunnels.

Question 9

What are the checkpoints before starting the pump?

Accepted Answer

Ensure the impeller is free if unused for long periods. Secure all electrical and piping connections. Carry out a Megger test to check winding continuity and give a quick start to check the flow direction. Check for noise, vibration or abnormal current periodically, and keep genuine spare parts in stock.

Question 10

What are the points to remember while operating a pump?

Accepted Answer

Use an adequate power source and maintain rated voltage, current and frequency. Maintain minimum submergence level and avoid sharp bends in hose or pipe. Use proper cable size and inlet screening. Ensure liquid temperature stays within permissible limits and accessories are compatible with the pumped liquid.

Question 11

Is your pump giving insufficient or no discharge?

Accepted Answer

This can be caused by low voltage or frequency, incorrect direction of rotation, system head higher than pump head, piping leakage, a choked impeller, clogged strainer, or inadequate water level. Check supply voltage, correct rotation direction, inspect piping, and clean the impeller or strainer as needed.

Question 12

Is your pump giving abnormal noise or vibration?

Accepted Answer

This may be due to incorrect rotation direction, runaway operating condition, loose nuts and bolts, cavitation, bent shaft, worn bearings or a worn impeller. Correct rotation, throttle the valve, tighten fittings, or replace worn parts as required.

Question 13

Is your pump drawing excessive current?

Accepted Answer

This may result from mechanical jamming, high supply frequency causing high motor speed, low voltage, worn bearings, or a defective or short-circuited cable. Check and clean the impeller, verify rated frequency and voltage, and inspect cable condition.

Question 14

What to do when your pump is not starting?

Accepted Answer

Check for inconsistent power supply, improper pump-panel connection, defective or cut cable, a choked pump, or winding short circuit. Ensure consistent rated power, proper connections, and contact the company service centre if rewinding is required.

Question 15

What are the checkpoints for preventive maintenance of submersible pumps?

Accepted Answer

Ensure proper control devices, clean contactors periodically, check current values against the pump manual, verify supply voltage and frequency, inspect for noise or vibration, check cable condition and insulation resistance above 100 megaohms, and ensure no piping leakage or mechanical jamming.

Question 16

What are the checkpoints for corrective maintenance of submersible pumps?

Accepted Answer

Always disconnect electrical supply before maintenance. Keep genuine spare parts in stock, check for wear in impeller, wear ring, casing and bowl, and replace as needed. Refer to the pump manual for mechanical seal fitting and cable replacement, and ensure motor rewinding is done by trained personnel.

Question 17

How to get your dewatering pump monsoon ready?

Accepted Answer

Audit your existing pumping system and arrange standby pumps. Ensure proper control devices and undamaged cables, check insulation resistance and winding continuity, and verify the impeller is free of jamming. At site, secure all connections, check for leaks, noise or vibration, and train operators with a stock of genuine spare parts for emergencies.

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