Cooling jacket for 4SR motors 2.2-3 kW

The efficiency and lifespan of a submersible pump directly depend on the adequate cooling of its electric motor. If your submersible pump fails prematurely, or the well diameter significantly exceeds the pump diameter, the main reason could be insufficient cooling, leading to motor overheating. It is precisely to solve this critical problem that the Pedrollo cooling shroud for 4SR motors with power ratings of 2.2-3 kW was developed.

Why is Cooling So Important for a Well Pump?

Any electric motor generates heat during operation. During prolonged operation, it reaches the so-called steady thermal balance. If the pumped water does not sufficiently flow around the motor casing, cooling becomes ineffective. This leads directly to: 

▪️Insulation overheating: Shortens the lifespan of the windings. 

▪️Intensive insulation aging: Every additional 10 degrees of heating approximately halves the insulation's lifespan. 

▪️Sharp drop in overall motor lifespan: The pump fails much earlier than planned.

For well pumps, especially in cases where the well diameter is significantly larger than the pump itself, or when using the pump in tanks/reservoirs, natural convection of cold water is absolutely insufficient. Cooling must be forced, ensured by the flow of incoming water.

Pedrollo Cooling Shroud: Guarantee of Optimal Performance

The Pedrollo cooling shroud is a specialized solution that ensures a sufficient flow velocity of the pumped water around the motor. European manufacturers of oil-filled electric motors for 4-inch and 6-inch well pumps recommend a flow velocity of at least 8 cm/s, and preferably at least 15 cm/s. Pedrollo 4SR pumps have a minimum linear cooling flow velocity of 8 cm/s. If the velocity is lower, the thermal equilibrium on the motor windings shifts towards overheating.

Our cooling shrouds form an optimal linear flow velocity, calculated as the ratio of the pump's flow rate to the cross-sectional area of the conditional channel between the motor and the inner wall of the casing pipe. This prevents overheating and preserves the lifespan of your submersible pump's motor.

Advantages of the Pedrollo Cooling Shroud:

▪️Ensures forced convection: Guarantees effective motor cooling by water flow. 

▪️Extends motor lifespan: Protects insulation from thermal aging and overheating. 

▪️Compatibility: Ideally suited for Pedrollo 4SR motors with power ratings of 2.2-3 kW. 

▪️Easy installation: Installed during the pump installation phase. 

▪️Increased reliability: Even though Pedrollo 4SR motors are equipped with Class F insulation (heating according to Class B), which provides 4 times longer lifespan, additional cooling significantly extends their operating period. 

▪️Eliminates heating issues: Effectively solves the problem of overheating for pumps operating in tanks, reservoirs, and large-diameter wells.

Don't let your submersible pump fail prematurely due to overheating. Invest in a Pedrollo cooling shroud and ensure maximum lifespan and reliability for your equipment!