Shield Type Hot Water Circulation Booster Pump

A compact shield-type booster pump engineered for hot- and cold-water circulation and pressurization where stable flow and low noise are required. Designed for continuous operation with liquid temperatures up to 100°C, this pump is suited to applications such as low-pressure showers, household water boosting, solar water-heater circulation, boiler hot-water circulation, HVAC/refrigeration systems and liquid circulation/boosting in industrial equipment.

Key features

• Shielded motor design with stainless-steel sleeve that isolates the motor iron core from the liquid and eliminates the need for a conventional mechanical seal, reducing the risk of seal leakage.
• Ceramic shaft and high-quality bearings for improved wear resistance and corrosion resistance; internally water-lubricated for simplified maintenance and long service life.
• All internal motor materials are high-temperature rated to support hot-water operation.
• Low-noise operation suited to residential and commercial installations.
• Built-in three-speed switch located in the pump junction box to adjust performance to site conditions.
• Can be fitted with an automatic water-control switch (optional) for hands-free operation.

Operating conditions and media

• Liquid temperature range: 0 °C to 100 °C.
• Maximum ambient temperature: +40 °C.
• Suitable media: clean, neutral, non-explosive liquids similar to water (no solid debris, no viscous or strongly corrosive fluids). Compatible with glycol mixes up to 30%.
• For other liquids or aggressive fluids, consult supplier specifications before selection.
• Maximum working pressure: as specified in product data (see manufacturer datasheet).
• Minimum inlet pressure (examples from product data): 50 °C → 0.05 bar; 95 °C → 0.3 bar; 110 °C → 1.0 bar. These values account for altitude effects and cavitation prevention — maintain the recommended inlet pressure to avoid noise and cavitation.
• Rated voltage tolerance: -10% to +10%. Low supply voltage may cause slow operation, failure to start or overheating and reduced head.

Benefits for B2B buyers

• Reduced maintenance and downtime because of the seal-free shielded motor design.
• Flexible installation options thanks to the three-speed control and available automatic control switch.
• Durable construction for hot-water systems and demanding circulation/pressurization uses.
• Suitable for a wide range of commercial and light-industrial heating, hot-water recirculation and boosting applications.

Selection notes

• Hydraulic performance (flow, head, power consumption) and exact pressure ratings are model-dependent — verify the pump performance curve and maximum allowable pressure for the specific PBG model/size required for your system.
• Confirm compatibility if your system uses fluids other than water or high concentrations of additives.

If you provide required flow, head and operating temperatures, the appropriate pump size and control options can be selected to match your system requirements.