2 Way ZVT Lift and Lay Valves

2 Way Control Valves, DN25–DN40

Rangeability 50:1
For differential pressure up to 250kPa
No leakage when valve is closed

For water and refrigerants (max. 30% glycol)
Fluid Temperature
Pressure Class PN16

The valves in the range ZTVB / ZTRB are used to control heating and cooling in climate, heating and ventilation systems. They are intended to be used together with the RVAZ4 actuators.

The control valves in the ZTVB/ZTRB range are available as 2- and 3-way versions. Body and plug in brass, spindle in stainless steel and O-ring made of EPDM. The vavles have linear flow characterisitcs.

Function

The 2-way valve is closed when the spindle is in its highest position and completely open when the spindle is in its lowest position.

The 3-way valve is closed between port A and port AB

(The ports opposite to one another) when the spindle is in its highest position. In this position, the valve is also open between the bottom port B and the common supply port AB. When the spindle is in its lowest position, the 3-way valve is completely open between port A and port AB and consequently closed between the bottom port B and the common port AB.

Typical Applications

The valves are used to control hot and cold water in heating, ventilation and climate systems. They can also control refrigerants in for example liquid recovery systems.