The Model 735-M Surge Anticipating Valve is an off-line, hydraulically operated, diaphragm actuated valve. The valve, sensing line pressure, opens in response to the pressure drop associated with abrupt pump stoppage. The pre-opened valve dissipates the returning high pressure wave, eliminating the surge. The Model 735-M smoothly closes drip tight as quickly as the relief feature allows, while preventing closing surge. The valve also relieves excessive system pressure.

Product Features & Benefits

  • Replaces surge air vessels
    • Relieves surge, fail-safe open
    • Minimal maintenance
    • Economy of space
    • Lower investment & maintenance costs
    • Especially economic for higher pressure ratings
  • Line pressure driven
    • Independent operation
    • No motor required
    • Long term drip tight sealing
    • Adjustable hydraulic actuation
  • Double chamber
    • Moderated valve closing (no surges)
    • Protected diaphragm
  • In-line serviceable – Easy maintenance
  • Obstacle free, full bore – Uncompromising reliability
  • Balanced seal disk – High flow capacity

Typical Application

In this system, a pump battery supplies the main line through a manifold. The Model 735-M:

  • Eliminates surge upon power failure
  • Provides surge free switching between “on-duty” pumps
  • Closes smoothly according to pilot setting

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