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Technical Instructions
Document No. 155-199P25
October 24, 2005
Sizing, Continued
Mounting and
Installation
Service
Dimensions
Figure 4. Three-way Valve.
Page 6
•
The maximum capacity the valve must deliver.
•
The maximum line pressure differential the valve actuator must close against.
See Application Bulletin (AB)-1 Control Valve Selection and Sizing (155-285) for further
recommendations.
See Tables 3 and 4 for valve capacities.
Install the valve so that the flow follows the direction of the arrow indicated on the valve
body.
For best performance, install the valve assembly with the actuator above the valve body.
The valve and actuator can be installed in any position between vertical and horizontal.
It is not recommended to install the valve assembly so that the actuator is below
horizontal or up side down.
Allow sufficient space for servicing the valve and actuator. See Table 6 for valve body
dimensions. See Figure 5 and Table 7 for dimensions of the service envelope
recommended around the actuator.
NOTE:
Instructions for field mounting an actuator, wiring diagrams, and start-up
are covered in the Technical Instructions and Installation Instructions for
each actuator.
Replace the valve if inoperable.
See Table 6 for valve body dimensions. The letters in Figure 5 refer to the valve
centerline to top of actuator, the actuator width, and service envelope dimensions in
Table 7.
Table 6. Three-way Valve Dimensions.
Valve Size
A
inch (mm)
1/2
2-3/4
(15)
(70)
3/4
3-1/4
(20)
(83)
1
3-7/8
(25)
(98)
Weight
B
C
lb (kg)
2-15/16
1-5/16
(74)
(33)
3-9/16
1-5/16
(90)
(33)
3-15/16
1-9/16
(99)
(39)
Siemens Industry, Inc.
1.10
(0.5)
1.44
(.65)
2.20
(1.0)