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SUN HYDRAULICS
XQEFLANAE


$937.70 USD

Tags:

  • SUN HYDRAULICS
  • Material:XQEFLANAE
  • Model:XQEF-LAN-AE
  • Summary:Y-assembly

Quantity in stock: 0

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***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics XQEFLANAE (XQEFLANAE) is a sophisticated valve assembly designed primarily for charging an accumulator using a fixed displacement pump. This assembly efficiently manages the pump's operation by unloading it when the pressure reaches a predetermined set point and reactivating it when the pressure drops to a specific value determined by the pilot valve. The ventable relief within this system serves dual purposes: acting as a main stage to unload the pump and as an overpressure relief for the system. An integrated circuit softens the unloading process, ensuring smoother transitions in pump operation. When implementing this assembly, it is crucial to incorporate a separate drain line to mitigate erratic operations caused by fluctuations in tank line pressure. The selection of an appropriate adjustment range is vital, as system pressure drops and flow rates can significantly impact the performance of unloading valves. The design features large porting relative to its capacity, which encourages using large piping to minimize flow-induced pressure drop issues. Additionally, the spool design of the pilot valve maintains a fixed differential ratio thanks to its durable construction. With a capacity of 20 gpm (80 L/min) and designed for line mount applications, this assembly requires careful consideration of system pressures and flow rates during installation. The accumulator pilot valve must be set below any reliefs on the pump side to prevent excessive heating. This package includes an overpressure relief device set higher than the highest pilot valve setting and capped for safety.

This valve assembly is meant to charge an accumulator using a fixed displacement pump. When the pressure reaches the set point of the valve, the pump is unloaded. When the pressure drops to the value determined by the fixed percentage of the pilot valve, the pump is brought back on line to recharge the accumulator. The ventable relief serves a dual purpose as a main stage to unload the pump and as a system over-pressure relief. The assembly has an additional feature; a simple circuit that softens the unloading of the pump.

  • When applying this assembly, a separate drain line is required to prevent erratic operation caused by tank line pressure fluctuations.
  • NOTE: Careful consideration should be given when selecting an adjustment range. System pressure drops and flows tend to affect the operation of unloading valves. Low operating pressures combined with low differentials result in a very narrow band between unload and reset, requiring precise system design. High flow rates typically mean high pressure drops, which subtract from the differential the valve has to work with.
  • The pressure setting and the resultant reseat pressure are in reference to the port 2 area of the QCD* pilot valve. Pump pressure will be higher and accumulator pressure will be lower due to pressure drop caused by flow.
  • The porting on this assembly is large in relation to its capacity. This is done to encourage the use of correspondingly large piping to minimize problems caused by flow induced pressure drop.
  • The spool design of the pilot valve allows it to maintain a fixed differential ratio because the areas are created by diameters on the spool that will not wear or change with use.
  • The accumulator pilot valve must be set below any reliefs in the pump side of the system or severe heating could occur.
  • The relief in this package is meant to be an over-pressure device. It is set higher than the highest setting of the pilot valve and capped.

Capacity20 gpm80 L/min.
Body TypeLine mountLine mount
Mounting Hole Diameter.41 in.10,4 mm
Mounting Hole DepthThroughThrough
Mounting Hole Quantity22

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Notes:
  • Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher than 3000 psi (210 bar), regardless of the port type/size specified.