The Honeywell VPE20F20AH pressure-independent control valve (PICV) DN20 combines the functions of a differential pressure controller, a presetting valve and a two-way control valve in one compact body. Thanks to the built-in diaphragm differential pressure controller, it maintains a constant flow rate in the range of 276–1850 l/h regardless of pressure fluctuations in the hydraulic circuit. The valve does not require separate balancing valves and is ideal for variable flow systems with inverter-controlled pumps. Threaded connection Rp 3/4" (female thread, DN20), nominal pressure PN25, differential pressure operating range 35–600 kPa. An actuator mounting adaptor is included in the delivery.

Main features and benefits

• 3 in 1: differential pressure controller, flow presetting and control valve in one body – eliminating the need for separate balancing valves.
• Hydraulic authority close to 1: the linear flow characteristic ensures precise temperature control at the heat exchanger.
• Adjustable maximum flow rate: presetting in positions 1–9 allows the maximum flow rate to be set directly on the valve from 276 to 1850 l/h.
• Resistance to contamination: the special design of the diaphragm controller minimises friction of the moving parts and resists microparticles in the heat transfer medium – tested for 100,000 cycles at an Fe₂O₃ concentration of 900 ppm.
• Differential pressure measuring ports: the pressure test points allow verification that the start-up pressure has been reached and the valve operating point checked.
• Easy maintenance: the internal element (control valve + DPCV) can be removed and cleaned without dismantling it from the pipework.
• Actuator compatibility: the valve is designed for M400, M800, M7410, M6410, ML711/712CPA and M4100 series actuators (VPE0A7010 adaptor included in the package).
• EPD certification: a transparent environmental product profile in accordance with international standards.