ZL31A General features
Controlled fluid: cold and hot water with max 50% glycol volume.
Controlled fluid temperature 5 ÷ 120 ° C.
High closing point (▲).
Stainless steel shutter.
Stem in stainless steel.
EPDM O-ring stem seal.
Flow rate characteristic: – regulation port A – AB: equal percentage (VDI / VDE 2173) n (gl) = 3, bypass B – AB: linear (VDI / VDE 2173);
Leakage rate: adjustment port A – AB: max 0.05% Kvs, bypass B – AB: max. 1% of the value of kvs.
PN 16 flanges (according to ISO 7005-2);
Nominal pressure 1600 kPa.
Differential pressure ∆pmax 400 kPa.
Power supply: 230V 50/60Hz.
Power consumption:– from DN25 to DN50 – 6VA;– from DN65 to DN150 – 10VA.
Power supply cable 1m – 4×0,75 mm².
Tolerance range AC 198…264 V.