Spring loaded self-actuated Zero Velocity Valve to prevent reversal return of water column by perfect non-slam closing just before reversal of water column giving most effective surge control on tripping of pumps in raw waterclear water cross country rising main and lift irrigatimore...
Spring loaded self-actuated Zero Velocity Valve to prevent reversal return of water column by perfect non-slam closing just before reversal of water column giving most effective surge control on tripping of pumps in raw waterclear water cross country rising main and lift irrigatimore...
Spring loaded self-actuated Zero Velocity Valve to prevent reversal return of water column by perfect non-slam closing just before reversal of water column giving most effective surge control on tripping of pumps in raw waterclear water cross country rising main and lift irrigatimore...