Bermad WW-736 Large Metal Hydraulic Differential Pressure Sustaining Valve (AS5081/WaterMark)

The Bermad WW-736 is a hydraulically operated, diaphragm-actuated differential pressure control valve designed to maintain a constant pre-set pressure difference between two points in the system. It ensures system stability by automatically adjusting its opening to sustain the target differential pressure, regardless of fluctuations in upstream pressure or flow.

Engineered for high-demand water networks, HVAC balancing, and pump protection scenarios, the WW-736 features a double-chamber design for moderated valve response, enhanced accuracy, and long-term durability. The V-port throttling plug ensures superior control in low-flow conditions, while the balanced seal disc delivers high relief flow capacity with minimal turbulence.

Built with a wide-body Y- or angle-pattern configuration, the valve minimizes pressure losses and supports full-bore, obstacle-free flow. Its cavitation-resistant stainless steel seat and fully serviceable in-line design make it a reliable and cost-effective solution for protecting pumps and maintaining hydraulic balance in complex systems.

APPLICATIONS

• Pump Cavitation Protection
• Minimum Flow Safeguarding
• HVAC Circuit Balancing
• Differential Pressure Control Across Filters or Heat Exchangers
• Emergency Filter Bypass Systems
  

FEATURES

• Differential Pressure Control
  – Maintains consistent ΔP between two system points
  – Protects pumps and sensitive components from pressure imbalance
• Line Pressure Driven, Independent Operation
  – No external power required
• Balanced Seal Disc
  – High relief flow capacity and pressure stability
• Double-Chamber Diaphragm Design
  – Smooth and moderated valve response
  – Improved control accuracy and protection against surges
• Stainless Steel Raised Seat
  – Cavitation resistant for longevity in demanding conditions
• Wide-Body "Y" or Angle Pattern
  – Low head loss, non-turbulent flow
• V-Port Throttling Plug
  – Enhanced low-flow control and stability
• In-Line Serviceable
  – Simplifies inspection and maintenance without system downtime
• Modular Design with Optional Accessories
  – Adapts easily to complex system requirements