The valve integrates three functions – a differential pressure control valve (DPCV), a pre-setting valve and a two-way control valve – into a single DN20 body. This eliminates the need for separate balancing valves and significantly simplifies installation.

The VPE20F20AL model is designed for low flow rates in the range of 169–1,000 l/h and is equipped with pressure test points for measuring the differential pressure across the valve. The valve operates reliably even in variable flow systems driven by inverter-controlled pumps – the flow to terminal units remains stable regardless of fluctuations in pressure conditions within the system.

Main features and benefits

• Integrated three-function design – a differential pressure control valve, flow pre-setting and a two-way linear control valve in a single body eliminate the need for separate balancing valves.
• Pressure-independent control – the flow rate remains constant regardless of changes in differential pressure in the hydraulic circuit (operating range 30–600 kPa).
• Adjustable maximum flow rate – the pre-setting mechanism allows simple adjustment of the maximum flow rate within the range of 169–1,000 l/h; the stroke of the linear ball plug is precision-machined for an almost linear flow characteristic.
• Pressure test points – allow verification during commissioning that the minimum operating differential pressure has been reached and exceeded.
• Resistance to dirt – the special geometry of the differential pressure controller, with minimal friction of moving parts, significantly reduces the risk of clogging even when operating with water containing microparticles.
• Easy maintenance – the internal element (control valve and DPCV) can be removed, cleaned and reused without dismantling the pipework.
• Excellent valve authority – an authority value close to 1 ensures precise control of temperature and heat exchanger output.
• EPD certificate – the product is provided with a third-party verified Environmental Product Declaration (EPD) in accordance with ISO 14025 and EN 15804+A2.
• Suitable for variable flow systems – ideal for systems with inverter-controlled pumps, where flow in the network changes dynamically.