3 - WAY MIXING VALVES, THREADED, SERIES 1000 TYPE: VM3, VDM3
Materials:
Valve body cast iron
Rotor: cast iron
Anchor screws: steel
Cover: aluminium
Bush: aluminium
Ring gaskets : EPDM
Type
VM3, VDM3
Nominal diameter:
DN
20
25
32
40
50
65
Nominal flow rate:
Kvs m3/h
20
30
37
38
45
79
Rated pressure:
PN
6
Max.working temperature:
t max
110°C
Max. pressure difference:
Dpmax
50 kPa
Max. rotation:
j
90°
Leakage A-AB:
=< 1% z Kvs
Leakage A-B:
=< 0,5% z Kvs
Type of the recommended servomotor:
V200 do DN50 (18 Nm); M1000 from DN65 (20 Nm),60,90,120,240,480s.
Identification number
VM3
 7.007.00185.0 7.007.00186.0 7.007.00187.0 7.007.00188.0 7.007.00189.0 7.007.00190.0
VDM3
 7.007.00166.0 7.007.00167.0 7.007.00168.0 7.007.00169.0 7.007.00170.0 7.007.00171.0

VM 3

VDM 3 		Overall dimensions
Æ
A
B
C
D
E
F
DN
UNI 228
mm
mm
mm
mm
mm
mm
20
G3/4"
130
65
40
128
52
45
25
G1"
130
65
40
128
52
50
32
G1 1/4"
140
70
40
128
52
60
40
G1 1/2"
156
78
40
128
52
70
40
G1 2"
150
75
40
128
52
85
40
G2 1/2"
200
100
56
158
66
105
Mixing valve identification :
 Specify the following data for exact valve identification :
Series
Type
Diameter mm
DN
"
1000
VM3
 3 - way with butterfly shut-off and threads
25
1"
1000
VDM3
 3 way with circular segments and threads
32
1 1/2"
Example: 1000 VM3 25: 3-way mixing valve series 1000
with butterfly shut-off, threaded G1" (DN25) according to ISO 228.

Spare parts code

Description
1
 valve body
2
 bush
3
 rotor
4
 felt + seal washer + O ring + flat gasket + cover + cover fastening screws
5
 bush + O ring + rotor + seal washer + plate + felt + gaskets
6
 handle + handle fastening screws
Application example

IInstallation diagram for a VM3 3-way mixing valve

Installation diagram for a VDM3 3-way mixing valve - function: mixing

Installation diagram for a VDM3 3-way mixing valve - Function: diverting
Note
 Valves are furnished standard with right inlets.
Proceed as follows whenever it is necessary to invert the inlet:
1) remove the manual lever and the metal label
2) remove the valve cover and extract the internal rotor
3) rotate the internal aluminium bush 180° so that the profiled
path is positioned at the opposite side
4) reinstall the internal rotor in the same position
5) reinstall the metal label upside down from its previous position
6) The valve must be installed in the plumbing circuit according to the flow direction specified on the valve.		 Main characteristics
This type of mixing valve is used in central heating system to ensure a hot return to the boiler and consequently achieve thermal operation at sufficiently high temperatures to prevent vapour condensation in the smokestack. Vapours, in combination with the products of combustion, can generate corrosive compounds that reduce the operating life of the boiler. MUT valves are furnished with manual control but can be easily motorised at any time using servomotors and valve-motor connections marketed by the manufacturers of regulation components. Internal rotor and valve body series 1000 are made of cast iron. Rotor rotation angle used for the regulation, is about 90°. Mixing is done by a circular segment rotor in models VDM and by a butterfly valve in models VM.