Brochure

F-27855-10148
8. VBB/VBS and VB-2000 Series
Ball Valve Assemblies
Mx1…Mx3 A0x Series Ball
Valve Assembly Selection
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Selection Guide
© 2019 Schneider Electric. All rights reserved. All trademarks are owned by Schneider Electric Industries SAS or its affiliated companies. February, 2019 tc
Document Number: F-27395-15
Ball Valve Assembly Selection Procedure
1. Select the actuator. When selecting a ball valve assembly, you must know the control signal type and voltage to first select
an actuator. Consult the following tables: Table-1 covers two-position actuator specifications and model numbers, Table-2
covers floating actuator specifications and model numbers and Table-3 covers proportional actuator specifications and model
numbers.
2. Select the valve body. The valve body model number is selected based on the line size (1/2” or 3/4”), ball
material trim, and flow coefficient (Cv/Kv) required. Consult Table-4 and Table-5 for brass trim valve body specifications and
model numbers and Table-6 and Table-7 for stainless steel trim valve body specifications and model numbers. See “Flow
Coefficient Selection” for information in determining the flow coefficient.
Other considerations
1.
General service conditions: Make sure the actuator is suitable for the anticipated ambient conditions and that the valve body
is compatible with the system fluid temperature and pressure requirements.
2. Close-off pressure: Confirm that the VBB/VBS ball valve’s close off rating is suitable for the valve control application.
3. Space requirements: If mounting space limitations are a consideration, check the actuator/valve assembly dimensions.
4. Pipe reducers: Refer to Tables for estimating effective Cvs when using pipe reducers.
5. Ordering information. You may order the actuator and valve body separately or as a factory assembly. To order a complete
valve and actuator assembly, specify the valve body part number and the actuator part number separated by a “+.”
Example: To order actuator valve body VBB2N15 and M312A00 as a factory valve/actuator assembly, specify
VBB2N15+M312A00.
Flow Direction
A notch cut into the stem indicator at the tip of the valve stem is an external indicator of where the closed portion of the ball sits
internally. Check the notch position prior to assembling the actuator to verify the ball is orientated in the correct plane.
Three-Way, A-Port Closed, B-Port Open
Stem Indicator
Ball Position
AB
A
B
A
Two-Way Closed
Stem Indicator
Ball Position
or
ABA
Two-Way Open
Stem Indicator
Ball Position
or
AB
A
Three-Way, A-Port Open, B-Port Closed
Stem I
ndicator
Ball Position
AB
A
B
In the drawings below, the black mark on the stem indicator represents
this stem notch.
Stem Indicator
Closed
Open
8. VBB/VBS and VB-2000 Series
Ball Valve Assemblies