Valve Install Instructions

VG7000 Series Bronze Control Valves Product Bulletin6
MP8000 Series Pneumatic Actuators
The higher force MP82 (25 sq in. effective diaphragm
area) and MP84 (50 sq in. effective diaphragm area)
Pneumatic Actuators are used where higher maximum
closeoff pressures are required, such as 1-1/2 and 2 in.
brass trim valves and 1/2 through 2 in. stainless steel
trim valves.
These actuators are equipped with a molded synthetic
rubber diaphragm contained in a sturdy, carbon-steel
housing that protects it against dirt and damage. The
actuator can be easily removed to perform inline
servicing to all parts of the valve. The MP8000
Actuators are available factory mounted or are easily
field mounted to VG7000 Series Valves. See Table 7
for the appropriate mounting kit.
The MP8000 Actuators are designed to allow for
reversing the action of the actuators in the field. If
desired, the action of the MP8000 on Normally Open
(N.O.) valves can be reversed from spring-return-up to
spring-return-down or vice versa. To field reverse the
actuator, refer to the MP8000 Pneumatic Valve
Actuators Technical Bulletin (LIT-977258).
The V-9502 Pneumatic Positioner is also available for
factory or field mounting to MP8000 Series Pneumatic
Valve Actuators.
T-3000 Valve Top Thermostat Actuators
The T-3111 and T-3311 Series Valve Top Thermostat
Actuators are available for field mounting to all VG7000
Series Valves (N.O., N.C., and three-way). The valve
top thermostats are a combination of a pneumatic
thermostat and a pneumatic valve actuator. The T-3111
and T-3311 are available in both direct and reverse
acting models with various features and options. Refer
to the T-3111 Integral Thermostat and Piston Top Valve
Actuator Single Temperature, Single Pressure Product/
Technical Bulletin (LIT-7171137) and the T-3311
Integral Thermostat and Piston Top Valve Actuator
Dual Temperature, Dual Pressure Product/Technical
Bulletin (LIT-7171152) for specifications and ordering
information.
Note: A mounting kit is required to field mount T-3111
or T-3311 Valve Top Thermostats to a valve. See
Table 7 for the appropriate mounting kit code number.
Electric Actuator Selection
Factory-mounted electric actuators are available on
two-way PDTC and three-way mixing valve
configurations only. Actuators can be easily field
reversed if required. The actuators can be field
mounted on PDTO valves if desired. All proportional
electric actuator assemblies are factory calibrated for
nominal 0 to 10 VDC operation, to drive down with an
increase in signal. The VA-4233 and VA78x0 are
available on all valve styles: PDTO, PDTC, and three-
way.
VA-4233 Series Electric Actuators
The VA-4233 Series Electric Actuators use 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. These
direct-mount, spring return electric actuators provide a
minimum 61 lb force output for floating, on/off, or
proportional control, and can be factory mounted to
1/2 through 1-1/4 in. valve bodies with NPT (threaded)
and union sweat end connections.
Integral auxiliary switches are available for indicating
end stop position or to perform switching functions. On
proportional models, position feedback is also available
through a proportional DC voltage signal. All models
feature a hand crank for manual positioning of the
valve, independent of a power supply.
VA-7150 Series Electric Actuators
The VA-7150 Series Actuators use a reversible
synchronous motor and magnetic clutch to accurately
position the valve. This non-spring return actuator has
a 90 lb force output. The magnetic clutch maintains a
constant load at the end of travel, ensuring tight valve
shutoff and automatically compensating for seat wear.
This actuator is available in three models: floating
three-wire (VA-7150), floating with 0 to 2000 ohm
feedback (VA-7153), or 0 to 10 VDC proportional
control (VA-7152).
VA-7200 Series Electric Actuators
The VA-7200 Series Actuators use a reversible
synchronous motor and a magnetic clutch to accurately
position the valve. This non-spring return actuator has
a 180 lb force output. The magnetic clutch maintains a
constant load at the end of travel, which ensures tight
shutoff and automatically compensates for seat wear.
This actuator is available in three models: floating
three-wire (VA-7200), floating with 0 to 2000 ohm
feedback (VA-7203), or 0 to 10 VDC (0 to 20 mA)
proportional control (VA-7202).