The differential pressure valves PVM is used to distribute the flow within different areas in heating and cooling systems. The differential pressure valves PVM consists of a differential pressure valve (PV) and a balancing valve (STV). PVM maintains the differential pressure across a circuit, such as a stem, which supplies radiators or to secure differential pressure over a control valve so that good authority is achieved for modulating regulation. The differential pressure held constant, can be adjusted to achieve the prescribed flow. At increased available pressure, the differential pressure valve closes and at reduced pressure, the differential pressure valve opens. The PVM package also includes a shut-off valve so that the circuitry return and return pipes can be closed.
