Electronic pump GPA II 130 25-4 0603W

Energy-efficient circulation pump for heating systems

The electronic pump GPA II 130 25-4 is an advanced solution for water circulation in heating systems, characterized by high energy efficiency and reliability. Designed to operate with clean liquids free of solid particles, it performs optimally in both residential and commercial installations. Its versatility allows use with glycol concentrations up to 30%, though a reduction in performance should be expected in such cases.

Construction and operating parameters

The pump’s durable housing is made of cast iron, while the impeller is constructed from engineered plastic, ensuring long-term, trouble-free operation. The two-pole motor guarantees stable performance, and the IP42 protection class combined with H-class insulation safeguards the device against moisture and overheating. The pump delivers a maximum flow rate of 2.4 m³/h and a maximum head of 4.1 meters. Thanks to its wide operating temperature range (+2°C to +110°C), it is suitable for diverse conditions. Minimum inlet pressure varies with fluid temperature—from 0.28 bar at 90°C to 1.0 bar at 110°C. Maximum operating pressure is 1.0 MPa.

Installation and user convenience

The GPA II pump has been designed for easy installation and maintenance. It supports horizontal shaft mounting, and the cable gland can be oriented downward or sideways, facilitating adaptation to specific installation requirements. The center-to-center distance between connections is 130 mm, with G1½" threaded connections as standard. The pump operates on ~230V AC (tolerance: -6% to +10%) at 50/60 Hz, consuming between 5 and 22 W (0.05–0.19 A). With an energy efficiency index (EEI) ≤0.23, this pump ranks among the most energy-efficient models available on the market—values below 0.23 are considered excellent. The pump offers AUTO operating mode and stepless MIN-MAX speed adjustment.