Product Overview

5/10
Siemens Building Technologies Two-port and three-port small valves PN16, ANSI Class 250 CM1N4845E
HVAC Products 11.2001
V...45.10-0.25 to V...45.25-6.3 V...P45.25-10 to V...P45.40-25
0,8
1
0,6
0,4
0,2
0
0 0,2 0,4 0,6 0,8 1
B
AB
A
A
B
ABA
00170
B
H
100
H
0
V
100
0,8
1
0,6
0,4
0,2
0
00,20,40,60,81
B
A
B
A
A
B
ABA
00171
H
100
B
H
0
V
100
Type VX...45... and VM...45... valves may be used only in mixing applications.
&
V
100
= Volumetric flow rate
H
0
= Valve stroke 0 % = path A → AB closed, and bypass B open
H
100
= Valve stroke 100 % = A → AB open, and bypass B closed
Port AB = Constant total flow from A and B → AB
Port A = Variable flow in the straight-through path from A → AB
Port B = Variable flow in the bypass control path from B → AB
Engineering notes
The valves should preferably be installed in the return, where the seals are exposed to
lower temperatures. See also «Mounting» and «Commissioning».
A strainer should be fitted upstream of the valve.
01463
AB A
Flow only permissible in direction of arrow
from A → AB (marked on valve body)
Port AB = Variable flow through straight-through port (outlet)
Port A = Variable flow through straight-through port (inlet)
Stem retracted: Path A → AB open
Stem extended: Path A → AB closing
AB A
B
01464
Type VXP45... and VXK45... valves
may be used only in mixing applications.
Mixing:
Flow from A and B → AB
Port AB = Constant total flow (outlet)
Port A = Variable flow A → AB (inlet A)
Port B = Variable flow B → AB through bypass (inlet B)
Stem retracted: Path A → AB open, bypass B closed
Stem extended: Path A → AB closed, bypass B open
Control characteristics
Caution !
Recommendation:
Two-port valves
(2-ports)
VVP45… / VVK45...
Three-port valves
(3-ports)
VXP45… / VXK45...