PRODUCT INFORMATION
Bermad WW723 Pressure Sustaining and Reducing Valve
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.
- Protecting lower pressure zones
- Prioritizing higher pressure zones
- Preventing pipeline emptying
- Ensuring controlled pipeline fill-up
- Pump overload and cavitation protection
- Compensating during groundwater drawdown
FEATURES & BENEFITS
- Line pressure driven – Independent operation
- Solenoid controlled
- Low power consumption
- Wide ranges of pressures and voltages
- Normally Open, Normally Closed or Last Position
- 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
TECHNICAL DATA
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 needle valve continuously allows flow from the valve inlet into the upper control-chamber. The PS pilot and the PR pilot 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 at the pilot setting. Should upstream pressure rise above PS pilot setting, the pilot releases accumulated pressure from the upper control chamber to the main valve outlet through the held open PR pilot, opening the main valve. Should opening the main valve cause downstream pressure to rise above PR pilot setting, the pilot closes, causing the main valve to throttle closed reducing downstream pressure to PR pilot setting. The needle valve controls the closing speed. The downstream cock valve enables manual closing.
LITERATURE
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Bermad WW723 Pressure Sustaining and Reducing Valve Brochure |
