Valve Install Instructions

VG7000 Series Bronze Control Valves Product Bulletin20
VA-4233 Series Electric Actuators
The VA-4233 Series Electric Actuators operate on
24 VAC or VDC power, and are available for use with
on/off, floating, or proportional controllers. These
actuators incorporate a stepper motor to accurately
position the valve. In the event of a power failure, a
spring in the actuator automatically returns the valve to
the full stem-up position. All models feature a hand
crank for manual positioning of the valve, independent
of a power supply.
Proportional models include an AUTO stroke
calibration feature that enables the actuator to redefine
the selected input signal and feedback proportionally
across the actual valve stroke. Initial application of a
power signal drives the actuator and valve assembly to
the full stem-up position and then the full stem-down
position, and stores these positions in nonvolatile
memory (retains data when power is lost or removed).
The actuator then drives to the position determined by
the applied control signal.
Installation and Servicing
We recommend that the VG7000 Series Valves be
mounted in an upright position in a conveniently
accessible location. Sufficient clearance must be
allowed for actuator removal. See the Dimensions
section for more details. The valve must be piped with
the flow in the direction indicated by the arrow, so that
the plug seats against the flow.
On electrically actuated valve assemblies, input lines to
the actuator must be wired correctly for the valve to
move in the proper direction.
Note: VG7000 Series Valves should not be used for
fluid service other than those indicated in the Technical
Specifications section.
Before servicing a VG7000 Series Bronze Control
Valve, isolate or disconnect the pneumatic supply or
electrical power to the actuator, allow sufficient
clearance for actuator removal from the valve, and note
the following:
IMPORTANT: Protect the actuator from dripping
water, condensation, and other moisture. Water or
moisture could result in an electrical short, which
may damage or affect the operation of the actuator.
IMPORTANT: Do not cover the actuator with
thermal insulating material. High ambient
temperatures may damage the actuator, and a hot
water pipe, steam pipe, or other heat source may
overheat it.
IMPORTANT: Take care to prevent foreign material
such as weld slag, thread burrs, metal chips, and
scale from entering the piping system. This debris
can damage or severely impede the operation of the
valve by embedding itself in the seats, scoring the
valve, and ultimately resulting in seat leakage. If the
debris becomes embedded in the seats, subsequent
flushing and filtering of the piping system with the
valve installed does not remedy the problem.
!
WARNING: Risk of Electric Shock.
Disconnect or isolate all power supplies
before making electrical connections.
More than one disconnect or isolation
may be required to completely
de-energize equipment. Contact with
components carrying hazardous voltage
can cause electric shock and may result
in severe personal injury or death.
!
WARNING: Risk of Personal Injury.
Shut off the liquid supply and relieve
pressure in the line before servicing the
valve. Contents of liquid lines could be
under pressure and the release of liquid
under pressure may cause severe
personal injury.
!
CAUTION: Risk of Property Damage.
Do not apply power to the system before
checking all wiring connections. Short
circuited or improperly connected wires
may result in permanent damage to the
equipment.
IMPORTANT: Make all wiring connections in
accordance with local, national, and regional
regulations. Do not exceed the electrical ratings of
the VG7000 Series Bronze Control Valve.