Piston valve WW-835-M

hydraulically-operatedadjustmentdouble

The Model 835-M High Pressure, Surge Anticipating Valve is an off-line, hydraulically operated, piston 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 835-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 Robust structure, piston actuated – High pressure service 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) In-line serviceable – Easy maintenance Obstacle free, full bore – Uncompromising reliability Balanced seal disk – High flow capacity TYPICAL PRODUCT APPLICATIONS Typical Application In this system, a pump battery supplies the main line through a manifold. The Model 835-M: Eliminates surge on power failure Provides surge free switching between “on-duty” pumps Closes smoothly according to pilot setting