This section gives basic specifications for Vickers pressure control threaded cartridge valves. Its purpose is to provide a quick, convenient reference tool when choosing Vickers cartridge valves or designing a system using these components.
Eaton offers a full range of Vickers direct and pilot operated relief, reducing, sequence and unloading valves. In general, the direct operated products are faster in response while pilot operated types have a flatter pressure/flow characteristic.
Relief Valves
When selecting a relief valve for a specific application, consideration should be given to the following
• Direct operated poppet types - RV1 and RV10
Suitable for continuous duty with reliable fast response, the RV10 being a low pressure, low cost option. These
valves are also suitable for piloting the DPS2 logic elements.
• Pilot operated poppet type with reverse freeflow check - RV2
Use as a service line relief where anticavitation make-up is required. It may also be applied as an internally piloted counterbalance valve in a service line.
• Direct operated poppet type, differential area models - RV3 and RV8
Sometimes termed a "differential area relief valve". A fast acting valve, highly tolerant of contaminant and providing an alternative flow path, frequently beneficial in manifold layout. Utilized in CRV3 cross-line relief packages.
• Pilot operated spool type - RV5 and RV11
Well suited for repetitive, continuous duty with a low pressure-override characteristic.
• Direct operated ball type - RV6
A fast-acting valve for intermittent duty. This low flow, low cost valve may be used as a pilot section for a larger mainstage valve, or piloting logic elements.
Reducing Valves
Two types are available:
• Direct operated with relieving feature - PRV1
• Pilot operated with relieving feature - PRV2 and PRV12
• Pilot operated without relieving feature
Sequence Valves
A complete range of sequence functions is available, including:
• Normally-closed and normally-open models
• Internal and external pilot options
• Internal and external drain options
• Two and three position models
Externally drained models may be used as relief valves in circuits with alternating pressure and tank line functions.
Accumulator Unloading Valves
Valves that allow accumulators to be charged to a preselected maximum pressure at which the pump is unloaded. The pump does not cut-in until the accumulator pressure has decayed to a pre-selected percentage of maximum pressure.
The low-flow PUV3 model can be used as a stand alone model for low flow applications, or as a pilot stage in two-stage arrangements for higher flows.
Accumulator Discharge Valve
This valve is designed to ensure that an accumulator will discharge when pilot pressure is lost, e.g. on pump shutdown.
Produs de: Eaton
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