Emerson Bettis EHO - Page 38

Installation and Operation Manual
Part Number: VA001-507-32, Rev. 1
August 2016
35
Section 5: Operation
Operation
Figure 24 Main Components Double Acting with ESD Solenoid and Accumula-
tor
(A) Pressure Gauge(Optional)
(B) Nitrogen Relief Valve(Optional)
(D) Isolation Valve(Optional)
(E) Hydraulic Accumulator With Nitrogen Blanket
Charge(Optional)
(H) Accumulator Isolation Valve(Optional)
(N) Accumulator Isolation Valve(Optional)
(R) Pressure Switch
(Q) Hydraulic Pressure Gauge
(S) Pressure Transmitter(Optional)
(T) Check Valve
(V) Adjustable Flow Controls
(U) Relief Valve
(O) Hand Pump Isolation Valve(Optional)
(W) Bettis G-series Double Acting Actuator
(AB) Pressure Transmitter(Optional)
(J) Opening Solenoid
(K) Closing Solenoid
(P) ESD Solenoid Valve(Optional)
(X) Shuttle Valve(Optional)
(AC) Shuttle Valve(Optional)
(Y) Hydraulic Pump
(AD) Accumulator override valve to open(Optional)
(AE) Accumulator override valve to close(Optional)
(Z) Electric Motor
(AA) Suction Strainer
(I) Fluid Reservoir
(L) Hand Pump
(M) Hand Pump Selection Valves
M M
L
H
N
W
AD AE
E
B
A
D
J
X
Y
Z
AA
I
K
O
P
AC
R
Q
T
U
V
S
(W) Bettis G Double Acting Actuator
(Z) Electric Motor
(Y) Hydraulic Pump
(I) Fluid Reservoir
(K) 3-Way Normally Closed Solenoid Valve for closing the actuator
(J) 3-Way Normally Closed Solenoid Valve for opening the actuator
(V) Adjustable Flow Controls. There are two flow controls located upstream of the
open and close solenoid valve items (J) & (K).
(AA) Suction Strainer
(T) Check Valve
(U) Relief Valve: A pressure relief valve is provided to protect the actuator and con-
trol system from over-pressurization caused by the pump or thermal expansion of the
hydraulic fluid.
Q) Hydraulic Pressure Gauge
(R) Pressure Switch
(L) Hand Pump: Used to manually stroke the actuator open or closed.
(AD) Optional accumulator override 3-way isolation valve to open the actuator
(AE) Optional accumulator override 3-way isolation valve to close the actuator