Liquid Controls LCR 600 Install - Manual (Page 20)

20
Two Stage 3-Way Valve
with (S2) Block Valve
2
Two Stage (S1 and S2) E-7 Valve
Two Stage (S1 and S2)
Block Valve
Two stage systems
valves
TWo sTaGe valves
The three most common Liquid Controls meter systems
with two stage valves are: a block valve with a S1 and
a S2 solenoid-operated valve fitted onto external piping
(A2848-11), a block valve with a S2 solenoid-operated
valve (A2859-11) and a 3-way solenoid on the LCR 600,
and an E-7 valve with a S1 and a S2 solenoid-operated
valve.
A2848-11 Valve
This two stage control valve has a S1 and a S2 solenoid-
operated valve. The S1 solenoid-operated valve is
located at the meeting point of three bypass pipes: one
pipe from the inlet side of the valve, one from the top
of the block valve, and one from the outlet side of the
valve. The S2 solenoid valve is located on a bypass pipe
that connects the inlet and outlet sides of the control
valve. It opens while the control valve is closed to supply
the dwell flow. This valve is typically used in refined fuels
applications.
A2859-11 Valve and 3-Way Solenoid
A two stage valve with a S2 solenoid-operated valve
and a 3-way solenoid valve attached to the back of the
LectroCount LCR 600. The 3-way solenoid-operated
valve is located at the meeting point of two pipes from
the vapor eliminator (one for eliminated vapor and
one leading to the spit tank) and one pipe to the top of
the block valve. The S2 solenoid valve is located on
a bypass pipe that connects the inlet and outlet sides
of the control valve. It opens while the control valve is
closed to supply the dwell flow. This configuration is
typically specified for products that hold vapor in the line
such as LPG and NH
3
.
E-7 Valves
A two stage valve with a S1 and a S2 solenoid-operated
valve. The E-7 valve is fitted with one external pipe to
divert product flow to the closing mechanism. To supply
a dwell flow, the E-7 bypasses the closed valve using
channels molded into its housing. This valve is typically
used in refined fuels applications.
single stage valves (cont.)
A2700 Series Electro-Pnuematic Valve
Electro-pnuematic valves use a S1 solenoid-operated
valve mounted to a pneumatic actuator to open and
close a V-7 valve. These valves are typically used in high
viscosity applications like lube oil.
E-7 Valve
A2859-11
Solenoid-Operated
Block Valve and 3 Way
Solenoid (PN 81527)
A2848-11
Solenoid-Operated
Block Valve