Control valve Anti-Hammer

Choice of the valve
The pressure sustaining/relief valve E2116-00 is controlled by a normally closed diaphragm actuated, two way, spring loaded, adjustable pressure discharging control valve (rep 1), set to maintain a minimum and constant pressure at valve inlet. When upstream pressure increases to the sustaining/relief set point, the control pilot (rep1) throttles towards open, increasing flow through the pilot circuit; pressure is decreased in the main valve control chamber, inducing the main valve to modulate towards open an appropriate amount, relieving excess upstream pressure through the main valve to its outlet. The opening speed can be adjusted by independent flow regulator “OPENING SPEED = OS” located in lockable central control “TUP – 93” rep7).

As the upstream pressure decreases to the sustaining/relief set point, the control pilot (rep1) throttles towards closed, restricting the flow through the pilot circuit. Pressure is increased in the main valve control chamber, inducing the main valve to modulate towards closed an appropriate amount, maintaining the desired upstream pressure. The closing speed can be adjusted by the independent flow regulator “CLOSING SPEED = CS” located in the lockable central control “TUP-93”. If upstream pressure is dropping below the sustaining/relief set point and is remaining below the set point, the main valve is closing drop-tight.