SUN HYDRAULICS
XQEHLANBM
$1,011.70
Tags:
- SUN HYDRAULICS
- Material:XQEHLANBM
- Model:XQEH-LAN-BM
- 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 XQEHLANBM (Material Number: XQEHLANBM) is a specialized valve assembly designed for charging an accumulator using a fixed displacement pump. This assembly efficiently manages the unloading and recharging of the pump based on pressure thresholds, enhancing system performance. It features a ventable relief that serves dual purposes: unloading the pump and providing overpressure relief for the system. Additional functionalities include a circuit to soften pump unloading and provisions for remote sensing of accumulator pressure, which is highly recommended to minimize errors on the accumulator side of the circuit. When implementing this assembly, it is crucial to incorporate a separate drain line to avoid erratic operations due to tank line pressure fluctuations. The selection of an appropriate adjustment range requires careful consideration, as system pressure drops and flows can influence unloading valve operations. The design ensures that high flow rates do not adversely affect performance by incorporating large porting relative to capacity, encouraging the use of large piping to mitigate flow-induced pressure drops. The pilot valve's spool design maintains a fixed differential ratio due to its durable construction, ensuring consistent performance over time without wear-related changes. It is important to set the accumulator pilot valve below any reliefs in the pump side of the system to prevent excessive heating. The relief component acts as an overpressure device, capped at a higher setting than the pilot valve's maximum. This line-mounted assembly has a capacity of 20 gpm (80 L/min) and requires precise setup for optimal operation under varying conditions. Its robust design makes it suitable for applications requiring reliable control over hydraulic systems involving accumulators and fixed displacement pumps.
The Sun Hydraulics XQEHLANBM (Material Number: XQEHLANBM) is a specialized valve assembly designed for charging an accumulator using a fixed displacement pump. This assembly efficiently manages the unloading and recharging of the pump based on pressure thresholds, enhancing system performance. It features a ventable relief that serves dual purposes: unloading the pump and providing overpressure relief for the system. Additional functionalities include a circuit to soften pump unloading and provisions for remote sensing of accumulator pressure, which is highly recommended to minimize errors on the accumulator side of the circuit. When implementing this assembly, it is crucial to incorporate a separate drain line to avoid erratic operations due to tank line pressure fluctuations. The selection of an appropriate adjustment range requires careful consideration, as system pressure drops and flows can influence unloading valve operations. The design ensures that high flow rates do not adversely affect performance by incorporating large porting relative to capacity, encouraging the use of large piping to mitigate flow-induced pressure drops. The pilot valve's spool design maintains a fixed differential ratio due to its durable construction, ensuring consistent performance over time without wear-related changes. It is important to set the accumulator pilot valve below any reliefs in the pump side of the system to prevent excessive heating. The relief component acts as an overpressure device, capped at a higher setting than the pilot valve's maximum. This line-mounted assembly has a capacity of 20 gpm (80 L/min) and requires precise setup for optimal operation under varying conditions. Its robust design makes it suitable for applications requiring reliable control over hydraulic systems involving accumulators and fixed displacement pumps.
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 two additional features; a simple circuit that softens the unloading of the pump and provisions for remote sensing of the accumulator pressure.
- 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 1 area of the QPA* pilot valve. Pump pressure will be higher and accumulator pressure will be lower due to pressure drop caused by flow. Use of the remote sense for accumulator pressure will minimize the error on the accumulator side of the circuit. Use of the remote sense is highly recommended.
- 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 | 20 gpm80 L/min. |
| Body Type | Line mountLine mount |
| Mounting Hole Diameter | .41 in.10,4 mm |
| Mounting Hole Depth | ThroughThrough |
| Mounting Hole Quantity | 22 |
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Additional Resources
- Integrated Packages: Solutions That Grow Your Reputation
- Fluid and Temperature Recommendations
- Sun's Floating Style Screw-In Cartridge
- Sun Model Code Explanation; 999-901-334
- Custom Integrated Packages from Sun
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.