The ASV-PV always operates together with a partner valve (ASV-BD or ASV-M), which is installed in the flow pipework. The two valves are connected by the impulse tube supplied in the package. Differential pressure control cannot be ensured without the partner valve – the partner valve provides the reference pressure for the ASV-PV diaphragm.

The Δp setting is adjusted by turning the adjustment scale without tools – clockwise increases the value, anticlockwise decreases it. The valve is factory-set to 10 kPa (range 5–25 kPa). After adjustment, the scale can be secured with a locking ring to prevent accidental or unauthorised changes. The shut-off function is structurally separate from the adjustment mechanism, so shutting off the system does not affect the setting.

Yes, the ASV-PV is also suitable for underfloor heating. The valve is installed on the return side upstream of the manifold and ensures a constant differential pressure for the entire manifold. Its compact installation dimensions allow it to be fitted directly into the manifold’s concealed wall cabinet. The flow in the individual circuits is then limited by setting the manifold itself or the ASV-BD partner valve.

Flushing is carried out using the optional flushing accessory (order no. 003Z7850), which is fitted onto the valve spring guide in place of the shut-off handle. The accessory is turned fully clockwise and the system is flushed in the direction of the arrow on the valve body. Before flushing begins, the system must be filled with water so that the differential pressure does not exceed 5 bar.

The ASV-PV valve is also available in a version with an EPP insulation cover. The insulation is intended for operating temperatures up to 120 °C and is fitted by simply clipping it on without tools. Both insulation materials used in the ASV range (EPS and EPP) meet fire classification B2 requirements in accordance with DIN 4102.