Valves – Liquid Controls LCR 600 Install User Manual

Page 19

valves

Single Stage (S1) Block Valve

Single Stage Electro-Pnuematic

Valve with V-7 Valve

Single Stage

3-Way Valve

Electro-Pnuematic

Preset Valve

A2847-11 Solenoid-Operated

Block Valve

A2859-11 Block Valve

and 3 Way Solenoid

(PN 81527)

single stage systems

liquid Controls’ valves overview

When ordered as part of a meter system with a LCR

600, Liquid Control’s control valves are bolted onto the

meter and wired to the LCR 600 at the factory. Electronic

control valves can also be ordered separately and retrofit

onto meter systems already in service. These valves

will need to be piped and wired in the field. For piping

instructions, refer to the valve manual. This manual

includes wiring instructions for the valves.

In order to control flow, the LCR 600 energizes and

de-energizes solenoid-operated valves on external

bypass piping routed off the main product flow. The

solenoid operated valves close off and open the bypass

pipes. The bypass pipes redirect some of the product

flow in order to open and close the control valve. These

solenoid-operated valves must be wired to the LCR 600

CPU board during installation.

Liquid Controls offers single stage and two stage

electronic valves. Single stage valves have one solenoid

valve (S1) and two positions—an open position and a

closed position. Two stage valves have two solenoid

valves (S1 & S2) and three positions—open, closed, and

dwell flow. Dwell flow is a low flow rate setting controlled

by the S2 solenoid and initiated shortly before the

sInGle sTaGe valves

The three most common Liquid Controls meter systems

with single stage valves include a block valve with a

S1 solenoid-operated valve fitted onto external piping

(A2847-11), a block valve (A2843) with a 3-way solenoid,

and an electro-pnuematic valve with an S1 solenoid.

A2847-11 Valve

This single stage control valve has a S1 solenoid-

operated valve located at the meeting point of three

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. This valve is typically used in refined fuels

applications.

A2843 Valve and 3-Way Solenoid

The 3-way solenoid-operated valve—mounted directly

to the top center port on the back of the LectroCount

LCR 600—serves as a S1 solenoid-operated valve. 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. 3-way solenoid-

operated valves are typically specified for products that

hold vapor in the line such as LPG and NH

The LCR 600 is also compatible with many other

brands and types of valves.