SUN HYDRAULICS
XQCKLANDK
$911.40 USD
Tags:
- SUN HYDRAULICS
- Material:XQCKLANDK
- Model:XQCK-LAN-DK
- Summary:Y-assembly
Quantity in stock: 0
***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 XQCKLANDK (XQCKLANDK) is a sophisticated valve assembly designed to efficiently manage the charging of an accumulator using a fixed displacement pump. This assembly features a ventable priority flow control valve that optimizes pump flow distribution. When the system pressure reaches the set point, the priority flow control is vented, making all pump flow available to the system. Conversely, when pressure drops as determined by the pilot valve's fixed percentage, priority flow recharges the accumulator while allowing remaining pump flow to serve system needs. Key features include a circuit that smooths pump unloading, an overpressure relief system, and a valve for dumping accumulator contents when the pump powers down. For optimal performance, a separate drain line is crucial to prevent erratic operations due to tank line pressure fluctuations. Selecting an appropriate adjustment range is critical: low operating pressures with low differentials can narrow the band between unload and reset points, necessitating precise design. High flow rates may increase pressure drops impacting differential calculations. Pressure settings reference port 2 area of the QCD pilot valve; note that actual pump and accumulator pressures will vary due to flow-induced pressure drops. The assembly's large porting encourages use of sizable piping to mitigate issues from flow-induced pressure drops. The pilot valve's spool design ensures a fixed differential ratio by utilizing durable diameters that resist wear over time. It's essential that the accumulator pilot valve is set below any system-side reliefs to avoid excessive heating. The package's relief mechanism acts as an overpressure safeguard and is preset higher than any pilot valve setting for safety assurance. This assembly supports capacities up to 15 gpm (60 L/min) and utilizes line mount body type with specific mounting hole specifications for secure installation and operation within hydraulic systems up to 3000 psi (210 bar).
The Sun Hydraulics XQCKLANDK (XQCKLANDK) is a sophisticated valve assembly designed to efficiently manage the charging of an accumulator using a fixed displacement pump. This assembly features a ventable priority flow control valve that optimizes pump flow distribution. When the system pressure reaches the set point, the priority flow control is vented, making all pump flow available to the system. Conversely, when pressure drops as determined by the pilot valve's fixed percentage, priority flow recharges the accumulator while allowing remaining pump flow to serve system needs. Key features include a circuit that smooths pump unloading, an overpressure relief system, and a valve for dumping accumulator contents when the pump powers down. For optimal performance, a separate drain line is crucial to prevent erratic operations due to tank line pressure fluctuations. Selecting an appropriate adjustment range is critical: low operating pressures with low differentials can narrow the band between unload and reset points, necessitating precise design. High flow rates may increase pressure drops impacting differential calculations. Pressure settings reference port 2 area of the QCD pilot valve; note that actual pump and accumulator pressures will vary due to flow-induced pressure drops. The assembly's large porting encourages use of sizable piping to mitigate issues from flow-induced pressure drops. The pilot valve's spool design ensures a fixed differential ratio by utilizing durable diameters that resist wear over time. It's essential that the accumulator pilot valve is set below any system-side reliefs to avoid excessive heating. The package's relief mechanism acts as an overpressure safeguard and is preset higher than any pilot valve setting for safety assurance. This assembly supports capacities up to 15 gpm (60 L/min) and utilizes line mount body type with specific mounting hole specifications for secure installation and operation within hydraulic systems up to 3000 psi (210 bar).
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 three additional features; a simple circuit that softens the unloading of the pump, a system over-pressure relief, and a valve that dumps the accumulator when the pump is powered down.
- 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.
| Capacity | 15 gpm60 L/min. |
| Body Type | Line mountLine mount |
| Mounting Hole Thread | .375-16 UNC - 2B in..375-16 UNC - 2B in. |
| Mounting Hole Depth | .62 in.15,7 mm |
| Mounting Hole Quantity | 22 |
Show FAQ
Additional Resources
- Integrated Packages: Solutions That Grow Your Reputation
- Sun's Floating Style Screw-In Cartridge
- Sun Model Code Explanation; 999-901-334
- Custom Integrated Packages from Sun
- Fluid and Temperature Recommendations
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.