Horizontal Circulation Pump

The WRS Horizontal Circulation Pump is a centrifugal inline pump designed for stable and reliable hot water circulation. Its hydraulic section mainly consists of the pump body and impeller, with a practical structure that supports efficient daily circulation and steady system operation.

The pump body of the WRS Series is made of HT200, offering good structural strength and dependable performance under normal hot water circulation conditions. The impeller is available in modified PPO engineering plastic or stainless steel, allowing more flexible configuration based on different application needs. This material combination helps improve durability and ensures reliable long-term operation.

With its stable structure, practical material options, and built-in overheating protection, the WRS Series is a reliable choice for hot water circulation systems that require safe and continuous operation.

 

Streamlined Design

Featuring a minimalist component count, this design ensures ease of manufacturing, quick installation, and effortless routine servicing.

Thermal Overload Protection

The single-phase 220V motor is equipped with a built-in thermal protector. The pump will automatically shut down if the motor winding temperature reaches the preset safety limit.

Optional Configuration

We offer different materials for the pump impeller, as well as single-phase and three-phase for diverse voltage requirements.

Maintenance during operation:
The suction pipeline must always be completely filled with liquid. Do not allow the pump to operate for a long time under cavitation conditions.

Check the motor current regularly. It must not exceed the motor's rated current.

After long-term operation, mechanical wear may cause increased noise and vibration. In this case, stop the pump for inspection. If necessary, replace wearing parts and bearings. In general, the recommended overhaul interval for the unit is one year.

Mechanical seal maintenance:
The mechanical seal must be lubricated with a clean medium free of solid particles.

Never allow the mechanical seal to run dry.

Before starting the pump, rotate the motor shaft by hand a few turns to prevent sudden startup from causing damage or cracking to the graphite seal ring.

The allowable leakage rate is 3 drops per minute. If leakage exceeds this value, the mechanical seal should be inspected.

Anti-freezing measures in winter:
In winter, the pump and pipelines may freeze, which can damage the piping and deform or crack the pump, making it unable to draw water. Anti-freezing measures should therefore be taken.

Horizontal pipelines should be buried more than 30 cm underground.

To prevent the residual liquid inside the pump from freezing in winter, loosen the drain screw in advance and completely drain the water from the pump.

Note: Do not cover the motor or pump with flammable materials for frost protection, as this may cause a fire.

Restarting the pump after long-term shutdown:
If the pump has been left unused for a long time and the motor does not run after the power is switched on, it may be because impurities inside the pump have solidified or stuck the rotating parts. In this case, disconnect the power supply, insert a screwdriver into the slot at the rear of the motor, and turn it to rotate the pump shaft. It is recommended to rotate it for at least 15 seconds. If the pump shaft then turns smoothly without sticking, the pump can be put back into service.

 

FAQ