2 - TCA spa

7VR SERIES VENTABLE RELIEF VALVEPILOT OPERATED7VR350SLIDING SPOOL TYPEDRAIN (3)2PRESSURE (1)CT1CT2PRESSURE (1)TANK (2)CT2CT1aTANK (2)DRAIN (3)PRESSURE (1)PRESSURE (1)APPLICATIONFor use in circuits which require relief protection and asolenoid vent feature for unloading and dumping systemflow to tank. The external vent port can be referenced toeither a remote pilot section for two pressure systems, orto an external directional valve to allow manual pressureunload.OPERATIONThe valve consists of a pilot relief cartridge, atwo-way normally closed or normally open solenoid and ahoned assembly. The main section spool spring chamberis referenced to tank, pilot flow across the main sectionspool causes a pressure imbalance and the spool shiftsopen allowing inlet flow to tank.SOLENOID VENTINGThe solenoid vent feature allows system flow to bedumped to tank at a minimum pressure drop. Whennormally closed solenoid is energised, pilot flow isbypassed around the relief pilot section to tank and themain section spool is vented fully open dumping inlet flowat low pressure (see curve). If normally open solenoid isused, the main spool shifts open and continuously dumpsinlet flow to tank until the solenoid is energised. When thesolenoid is energised, it closes and prevents pilot flowcausing the main section spool to close.RELIEF VALVEWhen used as a conventional relief valve, the solenoid isclosed. When inlet pressure exceeds the valve setting, themain section spool opens allowing relief flow to tank.FEATURESCombined funtions simplify circuit. High capacity forrelieving or unloading. Hardened and ground working partsfor long life.SPECIFICATIONSFigures based on: Oil Temp = 40°C Viscosity = 40 cStRated FlowMax SettingCartridge MaterialBody MaterialMounting PositionWeightSeal Kit Number350 litres/min (92 US GPM)210 bar (3000 psi)Working parts hardened and groundsteel. External surfaces zinc platedStandard aluminium (up to 210 bar*)Add Suffix ‘377’ for steel optionUnrestricted2.80 kg (6.2 lbs)SK1154 (Nitrile) SK1154V (Viton)RecommendedFiltration LevelOperating TempLeakageNominal ViscosityRangeBS5540/4 Class 18/13(25 micron nominal)-20°C to +90°C (Standard seals)100 millilitres/min @ 210 bar5 to 500 cSt*For applications above 210 bar please consult our technical department or use the steel body option.Integrated Hydraulics LtdIntegrated Hydraulics IncCollins Road, Heathcote Ind. Est., Warwick, CV34 6TF, UK.7047 Spinach Drive, Mentor, Ohio 44060, USATel: +44 (0) 1926 881171 Fax: +44 (0) 1926 315729 Tel: (440) 974 3171 Fax: (440) 974 3170Website: www.integratedhydraulics.comWebsite: www.integratedhydraulics.com2-235.C