AVPQ (PN16)
AVPQ is a self-acting differential pressure and flow controller primarily for use in district heating systems. The controller closes on rising differential pressure or when set max. flow is exceeded.
The controller has a control valve with adjustable flow restrictor, an actuator with two control diaphragms and handle for differential pressure setting (fixed setting version (available on special request) is without handle).
Main data:
– DN 15-32
– kVS 1.6-10 m3/h
– Flow range: 0.06−7.3 m3/h
– PN 16
– Setting range (AVPQ): 0.1-0.5 bar / 0.2-1.0 bar
– Flow restrictor Δpb: 0.2 bar
– Temperature:
– Circ. water / glycolic water up to 30 %: 2 … 150 °C
– Connections:
– Ext. thread (weld-on, thread and flange tailpieces)
Features and benefits
- Integrated control valve with adjustable flow restrictor and dual-diaphragm actuator (with optional fixed setting) enables precise flow limitation, accurate differential pressure control, and easy commissioning.
- Protects district heating systems from excessive pressure or flow, ensuring stable operation, improved energy efficiency, and long-term reliability.