Mixing controller Siemens 3-way VBF21.125 SAL

Description

The Mixing controller Siemens 3-way VBF21.125 consists of several components: 3-way Mixing valve with a diameter of 125 mm (also called linear valve, mixer or (control) valve) Matching servomotor (actuator), type: Siemens electromotoric actuator SALxx.xxT10 N4502 for valve VBF21.xx Optional accessories like coupling, switches, potentiometers, mounting sets Repair and replacement parts such as sealings, packing, […]

The Mixing controller Siemens 3-way VBF21.125 consists of several components:

• 3-way Mixing valve with a diameter of 125 mm (also called linear valve, mixer or (control) valve)
• Matching servomotor (actuator), type: Siemens electromotoric actuator SALxx.xxT10 N4502 for valve VBF21.xx
• Optional accessories like coupling, switches, potentiometers, mounting sets
• Repair and replacement parts such as sealings, packing, O-rings and plugs

Siemens Three-port slipper valves, PN6, flanged VBF21 PN6 N4241 DN 125 kvs 550 
Three-port slipper valve PN6 with flange fittings to ISO 7005 
For use in closed-circuit heating systems and mixing applications

DN 125
KVS 550
Angle of rotation 90 ° 
Medium temperature 1…120 °C 
Valve characteristic: lineair 
Permissable operating pressure: 600 kPa 
Material valve body: cast iron EN-GJL-250 (GG20/25) 
Material inside set: CrNi-staal/Rg6 
PN class 6 
Material housing: cast iron EN-GJL-250 inside: brass 
Leakage rate 0…0,5 % of kvs-value 

Siemens electromotoric actuator SALxx.xxT10 N4502 for valve VBF21.xx 

Manual control, position can be fixed. Plug in space for auxiliary switch and/or potentiometer. 

Operating voltage AC 230 V / AC24V DC24V
Positioning time 30 or 120 s 
Torque 10,00 Nm 
Angular rotation 90 ° 
IP54 
Ambient temperature, operation -15…55 °C 
Medium temperature -10…120 °C 
Mounting position Upright to horizontal 

Function: regulating the desired flow temperature in transport line or mixing group.

The hot water from the boiler is mixed in the three-way mixing valve with water from the return pipe to achieve the desired flow temperature. By adjusting a rotating segment in the mixing valve, the ratio can be determined. The valve position is controlled automatically by a signal from the climate control system/computer; if the water temperature deviates from the desired temperature, a signal is sent to the actuator which sets the valve to the desired position.