Emerson Bettis Electro-Hydraulic Operated Installation, Operation And Maintenance Manual page 40

Section 5: Operation
February 2021
NOTE:
Item numbers correspond to attached schematic drawing 11794-S.
(W)
(Z)
(Y)
(I)
(K)
(J)
(V)
(AA) Suction Strainer
(T)
(U)
(Q)
(R)
(L)
(M)
(X)
(S)
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Bettis G-series Double-acting Actuator
Electric Motor
Hydraulic Pump
Fluid Reservoir
3-Way Normally Closed Solenoid Valve for closing the actuator
3-Way Normally Closed Solenoid Valve for opening the actuator
Adjustable Flow Controls. There are two flow controls located upstream of the
open and close solenoid valve items (J) and (K).
Check Valve
Relief Valve: A pressure relief valve is provided to protect the actuator and
control system from over-pressurization caused by the pump or thermal
expansion of the hydraulic fluid.
Hydraulic Pressure Gauge
Pressure Switch
Handpump: Used to manually stroke the actuator open or closed.
Handpump Selection Valves: These two valves are engaged to isolate the control
system before using the handpump. Note: Both selection valves are engaged at
the same time when the handpump is used to open or close the actuator.
Shuttle Valve; (Optional) Used with an optional pressure transmitter.
Pressure Transmitter (Optional)
Installation, Operation and Maintenance Manual
VCIOM-13254-EN Rev. 3
Operation