3 - WAY MIXING VALVES, THREADED, SERIES 3000
TYPE: VDM3
Materials of components :
Valve body: brass
Cover: brass
Rotor: brass
Anchor screws : steel
Bush: brass
Ring gaskets : EPDM

Type
VDM3
Nominal diameter:
DN
20
25
32
Nominal flow rate:
Kvs m3/h
6,3
12
18
Identification number
VDM3
7.020.00020.0
7.020.00001.0
7.020.00026.0
Rated pressure:
PN
  10
Max. working temperature:
t max
110°C
Max. pressure difference:
Dpmax
  200 kPa
Leakage in the direction A-AB:
=< 0,12% z Kvs
Leakage in the direction A-B:
=< 0,030% z Kvs
Type of the recommended servomotor:
V70;7Nm;60s,90s,120s,modulation(MO),240s,480s,ON-OFF(OO)
Voltage
U
230V, 24V
Max. rotation:
j
90°

VDM3
  Æ DIMENSIONS (mm)
DN ISO228 A B C D
20 G3/4" 88 44 25 37
25 G1" 88 44 25 37
32 G1 1/4" 88 44 25 37




Main characteristics
This type of mixing valve is used in central heating systems to ensure a hot return to the boiler and consequently achieve thermal operation at sufficiently high temperatures to prevent vapour condensation. Mixing, with a linear characteristic curve between delivery and return water, is done by the profile of the specially shaped bush. Mixing is done by a circular segment rotor. MUT valves are furnished with manual control but can be easily motorised at any time using servomotors MUT series V and motors supplied by manufacturers of regulation components. Valves are made with brazen body and internal rotors. Rotor rotation angle used for the regulation, is about 90°, correspondent to the sequence from 0 to 10 on the reference leaflet (there isn't an end run, it can rotate of 360°).



Application example
Installation diagram for VDM3 3-way mixing valve

Mixing valve identification :
Specify the following data for exact valve identification :

Series
Type
 		  Diameter DN
mm
"
3000
VDM3
3 - way with circular segment
25
1
Example: 3000 VDM3 25: 3-way mixing valve series 3000 with segmented shut-off and G1 (DN25) threaded connections according to ISO 228.







Legend
1) Boiler
2) Mixing valve series 3000
3) Pump
4) Heating system

Function : mixing

 Function : diverting

Possible position of the armature in the duct : 3-way mixing valve can be fit on to the arbitrary position in regard to the duct.