2-Way and 3-Way Rubber-Lined Butterfly Valves
Installation Guide
VEF-53/56 Series
Mounting
1. Clean the lines upstream from the valve. Remove
any debris (welding slag, pipe scale, or other
contaminants) larger than 1/16 inch (1.6 mm).
NOTE: If the system experiences large amounts
of debris, steps should be taken to keep
the system clean, such as 20 mesh strainer
installed upstream of the valve.
2. Align the valve assembly according to the system
ow requirements. VEF-56 three-way valves can
be used in either mixing or diverting applications
(see the VEF-56 3-Way Details section).
NOTE: No ange gaskets are needed because of the
design of the seat face.
3. The valve may be mounted on either vertical or
horizontal pipe lines. On horizontal lines, mount
the valve so the actuator is positioned upright and
over the valve. (Leave sucient room on all sides
to service the actuator and valve.)
CAUTION
To prevent condensation from dripping onto the
actuator housing on horizontal lines, mount the
valve with the actuator in the upright position or, at
most, at a 90° angle. See the Mounting (2-Way and
3-Way) illustration below.
4. Bolt the valve to the pipes.
5. Eliminate air from the system to keep the valves
full of uid during operation.
VEF-56 3-Way Details
VEF-56
Arrangement
1 A B C
2 A C B
3 B C A
4 B A C
5 C B A
6 C A B
MASTER
DIVERTING
MASTER
MIXING
see actuator illustration below for Arrangement 3)
Actuator full CCW:
• Master valve closed
• Slave valve open
Actuator full CW:
• Master valve open
• Slave valve closed
Master
Valve
(Actuator)
1
SLAVE
1
FLOW
SLAVE
(Arrangements 2 and 4 not illustrated—
Slave
Valve
COMMON
COMMON
COMMON
COMMON
Common
5
SLAVE
5
SLAVE
Port
A
A
SLAVE
MASTER
SLAVE
MASTER
C
B
6
FLOWFLOWFLOW
MASTER
COMMON
6
FLOWFLOW
MASTER
COMMON
C
Arrangement 3
Actuator
Master
A
C
B
Slave
Arrangement 5
Up
(for horizontal
lines) or up
to 90° angle
2-Way Action:
CCW to Close
3-Way Action:
With Actuator Full
CCW, Master
Valve is Closed
and Slave Valve
is Open
Common
Master
C
A
B
Slave
Arrangement 5
DIVERTING Flow Example
Common
MIXING Flow Example
Maintenance
Mounting (2-Way and 3-Way)
VEF-53/56 Series Valves 1 Installation Guide
No routine maintenance is required. Careful installation ensures long-term reliability and performance.
Actuator Wiring
Wiring is dependent on the type of actuator,
mounting, and the desired options that are available.
Consult the actuator model label and then the
relevant sections in the MEP-7500/7800 series
actuators installation guide and application
guide on the KMC Controls web site for detailed
1. Loosen (2) wing
nuts and slide
“U” bracket away
from actuators.
Dual, Stacked Actuators Wiring Access
instructions on the applicable wiring, feedback
selector, and actuator/signal range reset (automapping) of the valve’s actuator. For dual, stacked
actuators, follow the process below to access
terminals in both actuators.
3. After actuator
wiring is complete,
2. Depress gear disengagement
button on actuators and rotate
actuators as shown to allow
access to wiring covers.
rotate actuators
back into position,
slide “U” bracket so
studs are centered
in rear slot of the
actuator and tighten
the (2) wing nuts.
More Information
For valve models, specications, and
additional information, see the VEB-
56 Series Data Sheet on the KMC
web site (www.kmccontrols.com).
or the VEB-53 Series Data Sheet.
For actuator wiring, feedback/direction selectors, actuator/signal range
reset (auto-mapping), and other
information, see the MEP-7500/7800
Series Installation Guide.
For actuator master/slave wiring, accessories, troubleshooting, and other
information, see the MEP-7500/7800
Series Application Guide.
For actuator specications and other
information, see the MEP-7500/7800
Series Data Sheet.
Operation
After the mechanical and electrical installations
have been completed, cycle the actuator to verify the
direction of rotation for normal operation and failsafe if so equipped.
CAUTION
Using mineral oil lubricants or other
incompatible substances in system fluids may
damage EPDM rubber seats in valves. Before
using any lubricant or additive in a water or
ethylene glycol base, consult the substance
manufacturer for compatibility with EPDM
(Ethylene Propylene Diene Monomer).
CAUTION
Freeze protection required for fluid
temperatures below 32° F (0° C).
KMC Controls, Inc.
19476 Industrial Drive
New Paris, IN 46553
574.831.5250
www.kmccontrols.com; info@kmccontrols.com
VEF-53/56 Series Valves 2 Installation Guide© 2013 KMC Controls, Inc. 732-019-38A