Eaton SystemStak DGM 3 40 Series Manual

EATON DGM**-3 40/41 Design E-VLST-BB001-E April 2015M-14MSystemStak™Pilot Operated Check ValvesDGMPC-3-41General DescriptionThese valves provide pilot operated check functions in one orboth service lines (A or B), the operating pilot supply comingfrom the opposite service line. Thus with pressure in oneservice line the check valve in the other service line will beopen (subject to system/actuator pressures being correct forthe valve area ratios).A 3:1 area ratio of pilot piston to check valve seat issupplemented by an optional 10:1 decompression feature.Typical SectionDGMPC -3- (D)** * [-(D)** *] - 411 2 3 4 5 6 7Model CodeDecompression featureD – 10:1 decompression ratioOmit if not requiredFunctionAB – Check in line A, pilot operatedfrom line BD – Check in line B, pilotoperated fromline A (single check model only)Check valve opening/crackingpressureK – 1 bar (14.5 psi)M – 2,5 bar (36 psi)N – 5 bar (72 psi)Decompression feature (secondfunction of dual models)As inOmit for single line models,and if notrequired for dual modelsNote: “D” must be specified here, for dualmodels, if called for inSecond function of dual modelsBA – Check in line B, pilot operatedfrom line AOmit for single line modelsCheck valve opening/crackingpressure (second function of dualmodels)Options as inOmit for single line modelsDesign number, 41 seriesSubject to change. Installationdimensions unchanged for designnumbers 40 to 49 inclusive.1 4 67523113P T B AB1 A1DGMPC-3-(D)AB*-(D)BA*P T B AB1 A1DGMPC-3-(D)AB*P T B AB1 A1DGMPC-3-(D)BA*Functional Symbols