You are using an outdated browser. For a faster, safer browsing experience, upgrade for free today.

SUN HYDRAULICS
XQCJLANAC


$723.10 USD

Tags:

  • SUN HYDRAULICS
  • Material:XQCJLANAC
  • Model:XQCJ-LAN-AC
  • Summary:Y-assembly

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.
***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 XQCJLANAC (XQCJLANAC) is a valve assembly designed to efficiently charge an accumulator using a fixed displacement pump. This assembly features a ventable priority flow control valve, which allows all pump flow to be available to the system once the pressure set point is reached. When pressure drops to a predetermined value, determined by the pilot valve's fixed percentage, the priority flow recharges the accumulator while leaving remaining pump flow for system use. Notably, this assembly includes a circuit that softens pump unloading and an overpressure relief system. A separate drain line is essential for preventing erratic operation due to tank line pressure fluctuations. When selecting an adjustment range, it's crucial to consider system pressure drops and flows as they influence unloading valve operation. Low operating pressures and differentials require precise design due to narrow unload and reset bands. High flow rates can cause high pressure drops that affect the valve's differential work capability. The pressure settings reference port 2 of the QCD pilot valve, with pump pressure being higher and accumulator pressure lower due to flow-induced drops. The assembly's large porting encourages using large piping to reduce problems from flow-induced pressure drops. The pilot valve's spool design maintains a fixed differential ratio through diameter-created areas on the spool that resist wear or change over time. It's important that the accumulator pilot valve is set below any reliefs on the pump side to avoid severe heating issues. The included relief is intended as an overpressure device, set higher than any pilot valve setting and capped for safety. This line-mount body type has a capacity of 15 gpm (60 L/min) with two mounting holes threaded at .375-16 UNC 2B in., each with a depth of .88 in (22.4 mm).

This valve assembly is meant to charge an accumulator using a fixed displacement pump. It incorporates a ventable priority flow control valve. When the pressure reaches the set point of the valve, the priority flow control is vented and all of the pump flow is available to the system. When the pressure drops to the value determined by the fixed percentage of the pilot valve, the priority flow is used to recharge the accumulator. Only the priority flow is directed to the accumulator leaving the rest of the pump flow available to the system. The assembly has two additional features; a simple circuit that softens the unloading of the pump and a system over-pressure relief.

  • 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.

Capacity15 gpm60 L/min.
Body TypeLine mountLine mount
Mounting Hole Thread.375-16 UNC - 2B in..375-16 UNC - 2B in.
Mounting Hole Depth.88 in.22,4 mm
Mounting Hole Quantity22

Show FAQ

Additional Resources



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.