Brochure

14
Accessories
GE’s Becker Control Valve Actuators provide reliability and accuracy for all of your
control valve applications
Limit Switches
Limit switches provide an indication of valve status and are commonly utilized on both on-off
and control valves. A limit switch assembly will close a contact at both the full-open and at
the full-closed position of valve travel. The switches provide a remote indication to gas control,
RTU or a flow computer as to the status of a valve. Limit switch assemblies are available with a
variety of configurations.
Housing NEMA 4, 4X, 7, Class I, Groups C & D,
Division 1 & 2
Switches 2 or 4
Option 2 or 4 Hermetically Seales Switches
SPDT Single Pole, Double Throw
DPDT Double Pole, Double Throw
up to 125 V D.C. at .5 amps
up to 250 V A.C. at 15 amps
Position Transmitter
The Valve Position Feedback assembly provides a quantitative indication of the exact position
of a control valve. The Valve Position Feedback assembly provides 4-20 mA analog remote po-
sition feedback proportional to the control valve position. The feedback signal may be utilized
as an integral portion of the control loop or merely as an additional feedback signal to gas
control for monitoring valve status. Valve Position Feedback is typically utilized on flow control
valves
Transmitter 4-20 mA Output
Housing NEMA 4, 4X, 7, Class I, Groups C & D,
Division 1 & 2
Switches 2 or 4
Option 2 or 4 Hermetically Seales Switches
SPDT Single Pole, Double Throw
DPDT Double Pole, Double Throw
up to 125 V D.C. at .5 amps
up to 250 V A.C. at 15 amps
Trip Valve
The Trip Valve protects double-acting actuators from loss of supply gas pressure. In the event
that the supply gas pressure falls below a minimum level, the trip valve can be configured to do
one of the following: lock the valve in last position, stroke the valve to the full-open position*,
Stroke the valve to the full-closed position*
*These applications require an additional volume tank to perform the operation
Max Allowable 150 psig 91034 kPa)
Weight 4.5 lbs (2.0 kg)
Body Connections 1/4” FNPT
Temp. Limits -40°F to + 180 F
(-40°C to +82°C)
Trip Point Adjustable from 40 psig (276 kPa)
to 70% of supply pressure
Volume Tank Required for fail-open or fail-
closed modes. DOT approval
LP Tank (240 psig (1655 kPa) Max
with DOT Stamp). Size based on
application
Hydraulic Operator override
The Hydraulic pump override is utilized for manual operation of large control valves when
pneumatic power is not available. The Hydraulic pump override utilizes a hydraulic pump and
reservoir to develop necessary torque to close/open the control valve. Hydraulic pump over-
rides are typically utilized on ball control valves larger than 16” bore.