4 - WAY MIXING VALVES, THREADED, SERIES 1000 TYPE: VM4
Materials:
Valve body cast iron
Rotor: cast iron
Anchor screws: steel
Cover: aluminium
Bush: aluminium
Ring gaskets : EPDM
Type
VM4
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 (18 Nm); M1000 from DN65 (20 Nm)
Identification number
VM4
 7.007.00159.0 7.007.00160.0 7.007.00161.0 7.007.00162.0 7.007.00163.0 7.007.00164.0

VM 4
Overall dimensions
Æ
DIMENSIONS mm
DN
UNI 228
A
B
C
D
F
20
G3/4"
130
65
40
128
45
25
G1"
130
65
40
128
50
32
G1 1/4"
140
70
40
128
60
40
G1 1/2"
156
78
40
128
70
50
G2"
150
75
40
128
85
65
G2 1/2"
200
100
56
158
105

Mixing valve identification :
 Specify the following data for exact valve identification :
Series
Type
Diameter mm
DN
"
1000
VM4
 4 - way with butterfly shut-off
25
1"
Example: 1000 VM4 25: 4-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

Installation diagram for a 4-way mixing valve
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 boiler. 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 butterfly valve.