Centrifugal circulation pump EXEC OHI 25/40-180 190 – inline 25 mm, 40/180 performance

EXEC OHI 25/40-180 190 is a centrifugal circulation pump designed for heating and water circulation systems. With a 25 mm inline connection and performance class 40/180, this pump provides steady flow and pressure suitable for residential and light commercial closed-loop applications. The pump is intended to circulate heated water through radiators, boilers and heat exchangers to maintain even temperature distribution and efficient system operation.

Advantages

The pump combines a compact inline design with centrifugal impeller technology to deliver consistent hydraulic performance while occupying minimal space. It supports stable flow rates at moderate head values, reduces temperature stratification in heating circuits and is easy to install in existing piping due to its standardized 25 mm connections. Construction materials and sealing are selected for operation in typical heating water, providing corrosion resistance and reliable mechanical operation over prolonged service intervals.

Suitable for

• Circulation of hot water in residential central heating systems
• Boiler loop circulation and heat exchanger feed
• Closed-loop heating and small commercial installations
• Replacement of similar inline 25 mm centrifugal pumps

Key specifications

• Connection diameter: 25 mm inline
• Performance designation: 40/180 class
• Pump type: centrifugal circulation pump
• Application: heating and water circulation systems
• Installation orientation: inline piping

How to use

Install the EXEC OHI 25/40-180 190 in the system piping according to flow direction markings on the pump body, ensuring the 25 mm connections are properly sealed and supported to avoid pipe stress. Connect electrical supply following local regulations and observe required safety protections such as circuit breakers and grounding. After installation, purge air from the circuit and verify flow and temperature profiles; adjust pump operation within the system controls to achieve desired circulation rates. Regularly inspect seals and mounting points and follow the system manufacturer’s guidance for maintenance intervals.

Usage recommendations

Use the pump in systems with appropriate water quality and temperature ranges for heating applications. Avoid running the pump dry and ensure filtration or strainers are installed upstream to prevent debris entry. For optimized energy use, integrate the pump with system controls or variable drives where applicable and perform periodic checks of bearings and seals to extend service life.