Pressure Sustaining and Reducing Valve Model 723 ■ Protecting lower pressure zones ■ Prioritizing higher pressure zones ■ Preventing pipeline emptying ■ Ensuring controlled pipeline fill-up ■ Pump overload & cavitation protection ■ Compensating during groundwater drawdown The Model 723 Pressure Sustaining and Reducing Valve is a hydraulically operated, diaphragm actuated control valve with two independent functions. It sustains minimum pre-set upstream pressure regardless of fluctuating flow or varying downstream pressure, and it prevents downstream pressure from rising above maximum pre-set regardless of fluctuating flow or excessive upstream pressure. Major Additional Features ■ Line pressure driven - Independent operation ■ In-line serviceable - Easy maintenance ■ Double chamber design □ Moderated valve reaction □ Protected diaphragm ■ Flexible design - Easy addition of features ■ Variety of accessories - Perfect mission matching ■ “Y” or angle, wide body - Minimized pressure loss ■ Semi-straight flow - Non-turbulent flow ■ Stainless Steel raised seat - Cavitation damage resistant ■ Obstacle free, full bore - Uncompromising reliability ■ V-Port Throttling Plug - Low flow stability ■ Solenoid control - 723-55 ■ Check feature - 723-20 ■ High sensitivity pilots - 723-12 ■ Solenoid control & check feature - 723-25 ■ Downstream over pressure guard - 723-48 ■ Proportional - 723-PD See relevant BERMAD publications.

BERMAD Waterworks 700 Series Operation The Model 723 is a pilot controlled valve equipped with two adjustable, 2-Way pilots, pressure sustaining (PS) and pressure reducing (PR), operating independently in series. The restriction [1] continuously allows flow from the valve inlet into the upper control chamber [2]. The PS pilot [3] and the PR pilot [4] together control outflow from the upper control chamber. Should upstream pressure fall below PS pilot setting, the pilot closes causing pressure to accumulate in the upper control chamber. The main valve throttles closed sustaining upstream pressure...

BERMAD Waterworks 700 Series Typical Applications Water is pumped from a deep well to the reservoir through a line also supplying nearby consumers along the way. Water is then supplied from the reservoir to both higher and lower elevation consumers. Both parts of the system require pressure sustaining and reducing solutions. Groundwater Draw Down System In deep well pumping systems, the groundwater level varies according to: seasonal changes, seepage rate, and demand. These systems require a solution to a unique combination of issues: n Consumer demand or filling an empty line results in pump...

Technical Data Differential Pressure Calculation Size Range: DN40-900 ; 11/2-36” End Connections (Pressure Ratings): Flanged: ISO PN16, PN25 (ANSI Class 150, 300) Threaded: BSP or NPT Others: Available on request Valve Patterns: “Y” (globe) & angle, globe (DN600-900 ; 24”-36”) Working Temperature: Water up to 80°C ; 180°F Standard Materials: Body & Actuator: Ductile Iron Internals: Stainless Steel, Bronze & coated Steel Diaphragm: Synthetic Rubber Nylon fabric-reinforced Seals: Synthetic Rubber Coating: Fusion Bonded Epoxy, RAL 5005 (Blue) approved for drinking water or Electrostatic Polyester...