Emerson Daniel 788DVC User Manual page 72

Operation parameters
October 2019
When pressure on both sides of the main valve piston are equal, a spring (located on the
top of the piston) acts as a differential force and closed the main valve piston. As pressure
against the bottom of the piston increases and exceeds the pressure exerted against the
top of the piston, plus the force of the spring, spring tension is overcome and the valve
opens.
CAUTION
EQUIPMENT DAMAGE
Read the entire recommended procedure for all installation operations and
maintenance procedures before attempting to install or disassemble the valve.
Disassembly of this cylinder assembly is different from previous Daniel Control Valves
and requires strict adherence to the procedures outlined in this manual.
Failure to read and comply with these procedures could result in damage to the
equipment and compromise in the integrity of the operation.
72
User manual
P/N 3-9008-556
Model 788DVC Digital Control Valve