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 external 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 Register—serves as a S1 solenoid-operated valve. The 3-way solenoid-operated valve is located at the meeting point of two lines from the vapor eliminator (one for eliminated vapor and one leading to the vapor return line) 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 NH3.
A2700 Series Electro-Pneumatic Valve
Pneumatic 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, such as lube oil.
