Valve with pre-setting FVX

Area of use

The FVX valve series is used to regulate the flow for radiators or cooling system.
FVX valves can be used with a self-acting thermostat or electronic thermostat via an actuator.

Description

The FVX valve series has an exact pre-setting function, placed inside the stuffing box. Pre-setting can be carried out using the pre-setting key FN2 by opening a number of turns from shut position as shown on the pressure drop diagram.
The FV8 pre-setting tool simplifies pre-setting. The valve is supplied with a protective cap in grey, which denotes pre-setting.The protective cap may during installation be used as shut-off, and also during pre-setting to set nominal opening with thermostatic head mounted. Turn the cap to the bottom and open 3/4 turns.

Technical data

Pressure class
PN 10
Max shutting pressure
50 kPa
Recommended pressuredrop
3-10 kPa
Kv value (pre-set) with Thermostat/no Thermostat
DN 15 0,05-1,5 / 0,05-2,3
DN 20 0,05-1,5 / 0,05-3,6
Kvs-value (max capacitet)
DN 15 2,3
DN 20 3,6
Max temperature
100°C
Min temperature
5°C
Material
Brass
Gaskets EPDM

Dimensions

Valve Dim A B C Weight/g
FVXR 15 68 34 30 304
FVXR 20 68 34 30 338

Preset

Pre-setting FN2 key
The valves are equipped with a insert with concealed pre-setting. Dismantle the stuffing box with the push rod (use the top of pre-setting key FN2). Place the pre-seting key with the bordered end down in the pre-setting sleeve and screw it carefully to the bottom (clockwise).
Screw up the pre-setting sleeve to the desired kv value according to the diagram. Assemble the stuffing box push rod.

Pre-setting FV8

  • Dismantle the stuffing box with the push rod (use the top of pre-setting key FN2).
  • Place the pre-setting key with the bordered end down in the pre-setting sleeve and screw it carefully to the bottom (clockwise).
  • Remove the pre-setting key and mount the presetting tool (FV8) over the insert splines and replace the pre-setting key through the tool.
  • Reset the scale to the index marker.*
  • Screw up the pre-setting sleeve so that the desired kv value coincides with the index marker.
  • Assemble the stuffing box push rod.

Order designations

RSK no. Art.no. Name Description Dim. Conn.
480 63 33 4047401 FVXR 15 Valve straight 15 1/2″
480 63 34 4047501 FVXR 20 Valve straight 20 3/4″
480 63 39 9000399 FVXR 15 Valve straight incl.connection 15 1/2″
480 63 40 9000401 FVXR 20 Ventil straight incl.connection 20 3/4″