differential pressure sustaining control valve a 3- way selector valve b Ball Valves c In-line Finger Filter d Differential Pressure Sustaining Pilot e Pressure Gauge description Armaş“DIF”model differential pressure sustaining valves keep differential pressure between two points at a fixed value regardless of variable flow rate and upstream pressure. The determined upstream pressure can be easily adjusted by a pilot valve. The valve controls booster pumps drainage, heating and cooling systems, bypass lines, filters and similar systems. Installation • Clean the pipeline before installing the valve. • Make sure that valve is on a level with the pipeline while mounting it. • Mount valve in direction of arrow indicated on it. • Ensure enough space around the valve assembly for future maintenance and adjustments. • While connecting valve on pipeline, place gasket between valve flange and pipe flange to ensure sealing and tighten the bolts as crosswise. • It is recommended that insulation valves (butterfly or gate valves etc.), air relief valve and strainer valves will be used in linemounting of valve. 1 Isolation Valve (Gate, Butterfly Valve etc.) 3 Differential Pressure Sustaining Valve

•Open ball valves (b1) and (b2) which are located on the valve. •Operate pump, open main valve on network and deliver water to the system. •Turn the adjustment bolt which is located on the pilot valve (d) to anticlockwise. Upstream and downstream pressure will be equal. •Make sure that the air inside of the system has discharged. •Adjust upstream and downstream pressure difference by use adjustment bolt which is located on the pilot valve. •When adjustment bolt is tighten to clockwise, upstream and downstream pressure difference is increased. If the bolt is tighten to anticlockwise, upstream...