Siemens VXP45 Series Owner's manual

Siemens Building Technologies, Inc.
Technical Instruction
s
Document No. CM1N4845E-P2
5
Rev. 4, February, 200
2
VVP45… and VXP45… Series
Two-port and Three-port Seat Valves
ANSI Class 250 Short-stroke Valves
Two-port Seat Valve
VVP45…
Three-port Seat Valve
VXP45…
Description Two-port seat valves of the VVP45… range with two-port connection
Three-port seat valves of the VXP45… range with three-port connection
Features • Nominal pressure, ANSI Class 250
• Bronze valve body
• 1/2-inch, 3/4-inch and 1-inch diameters
• Externally threaded connections G 1/2-inch, G 3/4-inch and G 1-inch
• Nominal stroke 5.5 mm
• Manual adjusting knob
• Can be fitted with SSB… or SSC… electric actuators
Application • In ventilating and air conditioning applications to control, for water side, terminal
units in closed circuits, such as induction and fan coil units, small unit heaters and
small water-cooled units. For use in:
− Two-pipe systems with one heat exchanger for heating and cooling
− Four-pipe systems with two separate heat exchangers for heating and cooling
• In heating applications to control heating zones in closed circuits, such as:
− Self-contained heating systems
− Apartments
− Individual rooms
Product Numbers See Table 1.

Technical Instructions VVP45… and VXP45... Series Two-port and Three-port Seat Valves
Document Number CM1N4845E-P25 ANSI Class 250
Rev. 4, February, 2002
Page 2 Siemens Building Technologies, Inc.
Fluids Hot water: to maximum 230°F (110°C), short-term to maximum 248°F (120°C)
Chilled water: over 36°F (2°C)
Water-glycol solutions
Operating Pressure Maximum 1600 kPa (16 bar) and ANSI Class 250
Table 1. Product Numbers.
Actuator
Positioning
Force
Line Size
mm
(inch)
Connectio
n
ISO Thread
GPM
Straight
-
through
VVP45…
(2-port) ∆ps
(ps
i)
GPM
Bypass VXP45… (3-port) ∆pmax
psi
45lb
f
67 lb
f
1.1 VVP45.10-0.25 0.79 VXP45.10-0.25 SSB SSC
1.8 VVP45.10-0.4 1.23 VXP45.10-0.4
2.8 VVP45.10-0.63 1.90 VXP45.10-0.63
4.4 VVP45.10-1 3.08 VXP45.10-1
10 (.394) G 1/2-inch
7.0 VVP45.10-1.6
87
4.93 VXP45.10-1.6
15 (.5906
)
G 3/4-inch 11.0 VVP45.15-2.5 58 7.71 VXP45.15-2.5
20 (.7874
)
G 1-inch 17.6 VVP45.20-4 58 12.33 VXP45.20-4
29
∆p = >29 psi increases risk of noise and seat-plug erosion
∆ps=
Close-off pressure
∆pmax = Maximum permissible differential pressure across closed valve with actuator
Cv = Nominal flow at pressure drop of 1 psi
Ordering When ordering, give quantity, product number and name of valve.
Example: 1 VXP45.10-1 three-port valve
Valves, actuators and screwed fittings are packed separately.
Equipment
Combinations Valves V…45.10-0.25 to V…45.25-6.3 are operated with SSB actuators (see data shee
t
CA1N4891.1E-P25 and CA1N4891.2E-P25) or SSC actuators. Valves V…P45.25-10,
V…45.32-16 and V…P45.40-25 are only operated with SSC actuators.
Actuator
Operating
Voltage Control Run Time
(Seconds
)
Positioning
Force GPM
SSB61... 24 Vac 0 to 10 Vdc 75 45 lbf 27.7
SSB81... 3-Point 150
SSC61... 0 to 10 Vdc 30 67 lbf 110
SSC81... 3-Point 150

VVVP445…and VXP45… Series Two-port and Three-port Seat Valves Technical Instructions
ANSI Class 250 Document Number CM1N4845E-P25
Rev. 4, February, 2002
Siemens Building Technologies, Inc. Page 3
Sizing
Water Sizing Equation:
p
Q
C
v∆
=
Where:
Cv= Flow Coefficient
Q = Volumetric flow rate (gpm)
∆p = Pressure drop, psi
Warning/Caution
Notations
WARNING:
Personal injury, or loss of life may
occur if you do not follow the
procedures as specified.
CAUTION:
Equipment damage, or loss of data
may occur if you do not follow the
procedures as specified.
Control
Characteristics
0,8
1
0,6
0,4
0,2
000,20,40,60,81
H
0
H
100
V
100
BAB
A
A
B
ABA
B
SVAL0067R1
Legend:
V100 = Volumetric flow rate
H0 = Valve stroke 0% = Path A →AB closed,
bypass B opened
H100 = Valve stroke 100% = Path A →AB opened,
bypass B closed
Tor AB = Constant total flow from A and B →AB
Tor A = Variable flow in straight-through path
from A →AB
Tor B = Variable flow in bypass-through port
from B →AB
CAUTION:
The VXP45…can only be used as mixing valves.
Engineering Notes
Recommendation
Valves VVP45… and VXP45… are preferably installed in the return, as this provides
lower temperatures on the seals.
Provide strainer upstream of the valve inlet.
AB A
AB A
SVAL0069R1
Figure 1. VVP45.
Two-port valves VVP45…
Flow permissible only in direction
of arrow from A →AB arrow on
valve body.
AB = Variable flow in straight-
through port (outlet).
A = Variable flow in straight-
through port (inlet).
Stem retracted: Path A →AB
open.
Stem extended: Path A →AB
closed.

Technical Instructions VVP45… and VXP45... Series Two-port and Three-port Seat Valves
Document Number CM1N4845E-P25 ANSI Class 250
Rev. 4, February, 2002
Page 4 Siemens Building Technologies, Inc.
Engineering Notes
Recommendation,
Continued
AB A
B
AB A
B
SVAL0070R1
Figure 2. VXP45.
Three-port valves VXP45…
Use as mixing valves only.
Mixing: flow from A
and B →AB.
AB = Constant total flow
(outlet).
A= Variable flow
A
→AB (inlet A).
B= Variable flow B
→AB
in bypass (inlet B.)
Stem retracted: Path A →AB
open, bypass B closed.
Stem extended: Path A →AB
closed, bypass B open.
Also see Mounting Notes and Commissioning Notes.
Mounting Notes
SVAL0072R1
Permitted Not Permitted
Figure 3. Mounting Positions.
See Engineering Notes for flow direction.
The valves are always supplied in a common package with installation instructions.
The valves are automatically closed by a return spring. The straight-through port
A →AB of the valve is opened by adjusting the manual knob or actuator; with three-
port valves, bypass B is throttled or closed. The manual adjusting knob only permits
opening to 70% (bypass 30% open)
Commissioning
Notes
Manual Adjustment
Two-port valves VVP45…
Spindle retracts: throughport from A →AB opens
Valve spindle extends: throughport from A →AB closes.
Three-port valves VXP45…
Spindle retracts: throughport A →AB opens, bypass B closes
Valve spindle extends: throughport A →AB closes, bypass B opens.
WARNING:
Before performing any service work on the valve and/or actuator, do the
following:
1. Switch OFF pump and power supply.
2. Close the main shutoff valve of the piping system.
3. Release pressure and allow to cool down completely.
4. Disconnect electrical connections, if necessary, from terminals. Only
commission the valve using the preset manual adjusting knob or with
an actuator mounted in accordance with the relevant instructions.

VVVP445…and VXP45… Series Two-port and Three-port Seat Valves Technical Instructions
ANSI Class 250 Document Number CM1N4845E-P25
Rev. 4, February, 2002
Siemens Building Technologies, Inc. Page 5
Specifications
Characteristics
Throughport A →AB ngl = 2.2
(equal percentage, optimized for large
controllable range)
Bypass B linear
Leakage rate Throughport A →AB 0 to 0.01% of Cvs-value
Bypass B 0 to 0.01% of Cvs-value
Rangeability See
Product Numbers
Threaded connections Valve ISO 228/1
Fitting ISO 7/1
Pressure class ANSI Class 250
Nominal stroke 0.2 inch (5.5 mm)
Valve materials Body Bronze
Spindle Stainless steel
Plug, seat, gland Brass
O-rings Special EPDM rubber
Weight See
Dimensions

Technical Instructions VVP45… and VXP45... Series Two-port and Three-port Seat Valves
Document Number CM1N4845E-P25 ANSI Class 250
Rev. 4, February, 2002
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners.
© 2002 Siemens Building Technologies, Inc.
Siemens Building Technologies, Inc.
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
Your feedback is important to us. If you have
comments about this document, please send
them to t[email protected]emens.com
Document No. CM1N4845E-P25
Printed in the U.S.A
.
Page 6
Dimensions
All dimensions in
inches (millimeters)
D
H1
H3
Hmin
H
L2
L1
B
AB A
SVAL0073R1
Figure 4. VVP45…
(2-port).
D
L2 L1
H1
H3
Hmin
L3
H
B
AB A
B
SVAL0074R1
Figure 5. VXP45…
(3-port).
Table 2.
Two-port Seat Valves VVP45…
D Product
Number B H Hmin
H1 H3 L1 L2 L3
G 1/2" VVP45.10-
0.25…1.6 1.14
(29)
8.07
(205)
4.92
(125
)
1.77
(44.9)
≈2.13
(54) 2.36 (60)
1.18
(30) —
G 3/4" VVP45.15-2.5 1.22
(31)
2.56
(65)
1.28
(32.5)
G 1" VVP45.20-4 1.42
(36)
8.27
(210)
5.12
(130
)
1.92
(48.9)
≈2.28
(58) 3.15 (80)
1.57
(40) —
Three-port Seat Valves VXP45...
G 1/2" VXP45.10-
0.25…1.6 1.14
(29)
8.07
(205)
4.92
(125
)
1.77
(44.9)
≈2.13
(54) 2.36 (60)
1.18
(30) 1.18 (32.5)
G 3/4" VXP45.15-2.5 1.22
(31)
2.56
(65)
1.28
(32.5)
1.28
(32.5)
G 1" VXP45.20-4 1.42
(36)
8.27
(210)
5.12
(130
)
1.92
(48.9)
≈2.28
(58) 3.15 (80)
1.57
(40) 1.57 (40)