Circulating pump WITA Delta HE light 60-25-130

Product detailed description

Circulation pumps play a critical role in maintaining consistent flow in central heating systems, hot water circuits and hydronic applications. In residential and commercial buildings, these devices ensure even heat distribution and stable pressure levels within closed-loop systems. When replacing or upgrading existing circulation units, installers must consider factors such as hydraulic demand, pipe dimensions, system layout and energy efficiency requirements. The WITA Delta HE light 60-25-130 is designed for integration into conventional and modern heating systems where efficient flow control and minimal electrical load are essential.

Typical installations include radiators, underfloor heating systems and solar thermal circuits. The pump’s compact design allows for installation in tight spaces behind panels or within mechanical rooms. The device supports both constant speed and variable differential pressure modes, making it suitable for systems with fluctuating loads or fixed flow requirements. Its modular configuration includes several mounting lengths and connection sizes to adapt to different piping arrangements.

Technical parameters

Code	DHEL0008HW
Brand	WITA

The maximum head of 6.0 m and flow rate up to 3600 l/h define the pump's hydraulic capability for system matching. The EC motor contributes to lower energy usage compared to traditional AC models, particularly when paired with proportional pressure characteristics. The eight selectable performance curves allow precise adjustment to match the system’s dynamic needs. The IP42 rating ensures basic protection against dust and splashing water, while the operating temperature range of +5°C to +110°C supports use in both heating and hot water applications.

Installation and connection

To install the pump, first confirm the correct DN size for the pipe section (DN 15 to DN 32 available). Secure the unit using the keyhole mounting system for fast alignment and tightening. Ensure the pipeline is clean and free from debris before connecting to prevent blockage risks. Verify the direction of rotation using the manufacturer’s markings to avoid flow reversal. The pump should be mounted horizontally to maintain proper sealing and alignment of the flange connections. Common installation errors include incorrect orientation, failure to prime the system, and over-tightening of the flanges, which can damage seals. After installation, test the pump manually to verify smooth rotation and absence of vibration or noise. Check the electrical connections for secure contact and insulation integrity prior to commissioning.

Compatibility and accessories

This pump is compatible with standard heating systems using glycol or water-based media. It integrates with thermostatic valves and room controllers via the built-in regulation modes. For complete system setup, ensure the inclusion of isolation valves, expansion vessels and pressure gauges. Insulation sleeves are included with the pump, but additional components such as pipe clamps and mounting brackets may need to be sourced separately for secure installation in complex layouts.

Technical background for designers

The pump operates using an EC motor with permanent magnets, which provides higher efficiency than asynchronous motors. The housing is made from cast iron with cathodic coating or brass, depending on the model variant, offering resistance to corrosion and mechanical wear. This material choice ensures long-term stability in environments with fluctuating temperatures and moderate chemical exposure. The pump integrates into a system through its flanged or threaded connections and contributes to system balance by maintaining steady flow rates or adjusting dynamically based on pressure changes. Longevity is influenced by media quality, correct installation and regular inspection of seals and bearings. The absence of external motor protection eliminates the need for separate overload relays, simplifying electrical design.

Service and operation

Routine checks should include verifying the pump’s operational sound and vibration levels, ensuring the absence of unusual noise. Monitor the inlet and outlet temperatures to detect signs of blockage or reduced flow. The anti-blocking function helps prevent clogging in low-flow conditions, reducing the need for manual intervention. As the pump does not require scheduled maintenance beyond visual inspections, service intervals are not specified in the technical documentation. Replace worn seals or damaged components immediately to maintain system integrity.

Frequently asked questions

Can the pump operate in hot water supply systems?
Yes, the WITA Delta HE light 60-25-130 is suitable for hot water systems due to its operating temperature range of +5°C to +110°C.

Is the pump compatible with variable-speed room controls?
Yes, the unit supports variable differential pressure settings, allowing it to respond to signals from room thermostats and building automation systems.

What connection sizes are available?
Available DN sizes are DN 15, DN 20, DN 25 and DN 32 to accommodate different pipe diameters.

Can the pump be installed vertically?
No, the pump must be mounted horizontally to ensure proper sealing and operation of the flange connections.