Proportional relief valve
This proportional relief valve for heating and cooling systems maintains a minimum flow through the main pipe, minimising the response times of the system's control loops. Its ability to open at times of increasing differential pressure ensures the pumps are protected. Ductile iron body - painted with duasolid that offers good rust protection.
Heating and cooling systems.
Maintaining minimum flow through the main pipe to minimize response times of control loops in the system.
Opens at increasing Δp.
PN 16 and PN 25
Max. differential pressure (ΔpV):
1600 kPa = 16 bar
Differential pressure adjustable 10 - 60 kPa, 50 - 150 kPa and 130 - 250 kPa.
Max. working temperature: 120°C
Min. working temperature: -10°C
Water and neutral fluids, water-glycol mixtures.
Valve body: Ductile iron EN-GJS-400
Actuator body: Ductile iron EN-GJS-400
Valve seat: Stainless steel
Valve plug: Stainless steel with EPDM insert
TA, DN, PN and flow direction arrow.
According to EN-1092-2:1997, type 21.