Wilo-Varios -STG 25/1-7 130 circulation pump 4215541

Circulation pump for heating and air conditioning systems

This efficient Wilo-Varios STG 25/1-7-130 circulation pump is a reliable solution for circulating water in heating, air conditioning, solar and geothermal systems. Its compact design makes it easy to install even in limited spaces, and advanced features ensure optimal performance and energy savings. It will work both as a universal replacement pump and as an element of new installations.

Design and application

The Wilo-Varios STG 25/1-7-130 pump is designed for durability and reliability. The cast iron GG 20 (GJL-200) housing provides corrosion resistance and long life. The polypropylene (PP-GF) impeller is resistant to the chemical agents contained in the heating water. The synchronous motor with ECM technology guarantees quiet operation and minimal energy consumption. The built-in speed controller allows precise adjustment of the pump performance to the current system needs, which translates into lower operating costs. Threaded connections ISO 228-1 with a diameter of 1 1/2 inches (40 mm) facilitate integration with the existing installation.

Advantages and benefits

• High energy efficiency: An energy efficiency index (EEI) of 0.2 guarantees minimal power consumption, which translates into financial savings.
• Performance regulation: The built-in speed controller allows for stepless adjustment of the pressure difference, adapting the pump's operation to the current demand for heat or cooling.
• Durable construction: The cast iron housing and polypropylene impeller provide resistance to corrosion and long device life.
• Quiet operation: The synchronous motor with ECM technology minimizes noise levels during pump operation.
• Versatility: Can be used in various types of heating, air conditioning, solar and geothermal installations.
• No maintenance required: Direct coupling of the motor with the impeller eliminates the need for regular lubrication of the bearings.
• Blocked current resistance: The motor is resistant to overloads, which increases safety of use.
• Wide operating temperature range: The pump can operate at an ambient temperature from -10°C to 40°C and pump liquid at a temperature from -10°C to 95°C.
• IPX4D protection class: Provides protection against splashing water, allowing the pump to be installed in various environmental conditions.

The Wilo-Varios STG 25/1-7-130 pump is an investment in comfort and energy savings that will quickly pay for itself thanks to low operating costs and reliable operation for many years. Its versatility makes it an ideal choice for both professional installers and end users looking for an effective solution for their heating or air conditioning system.