MANUAL VR2025

=
=
M
M
2
1
1 1
2 2
3
3
3
Type of valve Stem movement/ow
Flow
No ow
Actuator on
Actuator off
3-way valve (TRV20/25)
OK OK
OK NO!
VR 20/25
11
GB
Application
TRV20/25 (3-way valves) are primarily
designed to regulate the flow of water
in responce to demand of a controller.
These valves are made in forged brass
and stainless steel stem which ensures a
long life.
The valves should be used in
combination with an electric on/off
actuator. The actuator can be mounted
after piping, this simplifies installation
in confined locations. The valves have
even a built in return spring which
allows the valves to return to normal
position when the actuator is de-
energized.
3-way valve (TRV20/25)
Operating
When power is applied the actuator
pushes the valve stem down against
the return spring which allows the
waterflow to pass by. When de-energized
the return spring will return the valve to
it's normal position, a closed valve.
Mounting
The valve must be mounted in the
direction of the arrow according to the
direction of the flow of water that pass
by the valve. Valve with an actuator
must be mounted within 90
degrees of
the upright position, free from dripping
water and easy accessible for the
electrical wiring.
Technical specifications | TRV20/25
Material
Choice of valve
The right dimension of the valve can be
decided from the diagram below. Keep
in mind that the pressure drop and the
flow of water must be kept within the
white indicated field.
(VG5800KC / VG5800MC)
Pressure drop p, [kPa] (1 kPa = 10 mBar = 100 mmWK)
Flow [m
3
/h]
1 2
3 4
6
8
10 20
30 40
60 80
100 200 300
0,1
0,2
0,3
0,4
0,6
0,8
1,0
2,0
3,0
4,0
6,0
8,0
10,0
DN20
5
,5
3
,5
1
,6
2
,5
DN25
4
,0
Cv
Valve : Brass
Packing nut : Brass
Cage : Brass
Stem : ANSI Stainless steel
Spring : Stainless steel
Plug : Rubber EPT
Packning : Two rubber EPT O-rings
Specifications TRV20/25
Connection : DN20 (3/4") DN25 (1")
Cv-värde
(set for TRV) : 3.5 5.5
Max. pressure drop : 100 kPa 62 kPa
Fluid temperature limits : + 2
o
C to + 95
o
C
Ambient temperature
limits :
Min. : 2
o
C Max. : 50
o
C
Stroke : 3 mm
Weight [k g] : 0,48 0,8
Type Article no. RSK no. HxWxD [mm]
TRV20 10005 672 75 98 66x66x40
TRV25 10002 672 75 99 90x74x45