NTVS25-10 NTVS - 2-way control valves, DN15-150, kvs 0.4-310, DIN-standard

Pressure balanced 2-way valve intended for control of hot, cold or glycol-mixed water or district heating. Intended for use with the RVAN... actuators.

Specifications for NTVS25-10
Nominal diameter DN25
Kvs 10 m3/h
Stroke 20 mm
Actuator RVAN5
Specifications for NTVS - 2-way control valves, DN15-150, kvs 0.4-310, DIN-standard
Application Heating systems, cooling systems, district heating systems, district cooling systems, ventilation systems
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)…