VFDH20-6,3 VFDH - 2-way control valves

Pressure balanced 2-way valve, DN15-150, kvs 0.4-310, DIN-standard. Intended for control of hot, cold or glycol-mixed water, ideal for district heating within the temperature range -5...+185°C. Intended for use with the SE5.../SE10.../SE18.../SE25... actuators.

Specifications for VFDH20-6,3
Nominal diameter DN20
Kvs 6.3 m3/h
Stroke 20 mm
Actuator SE5
Specifications for VFDH - 2-way control valves
Pressure rating PN16
Connection Flanges according to EN 1092-2
Flow characteristics Equal percentage
Max. leakage 0.0 % of the kvs value (PTFE gasket, carbon-filled 25 %, no leakage) / 0.05 % of kvs for NTVS…-…M models with metal packing
Media Hot water, cold water, glycol-mixed water
Media temperature -5…+185°C
Rangeability 100:1
Max. diff. pressure 1600kPa
Body Nodular cast iron (GJS) EN-JS1050
Seat Stainless steel 1.4301 (DN15…DN100) or gunmetal CC491K (RG5) (DN125…DN150)
Plug Stainless steel 1.4305 (DN15…DN100) or gunmetal CC491K (RG5) (DN125…DN150)
Stem Stainless steel 1.4305
Lining Stainless steel 1.4301
Seat packing, soft seal PTFE with 25 % carbon
Seat packing, metal seal Stainless steel 1.4057
Packing box Dezincification resistant brass CW 602N, self-adjusting teflon
O-rings Viton

Spare parts kit, packing box for ETRS, MTVS and MTRS valves (until 2019-12), for ETVS valves (until 2021-04)…