SUN HYDRAULICS
XQGFLANDF

$1,166.40 USD

Tags:

SUN HYDRAULICS
Material:XQGFLANDF
Model:XQGF-LAN-DF
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 XQGFLANDF (XQGFLANDF) is a specialized valve assembly designed to efficiently manage the charging of an accumulator using a fixed displacement pump. This assembly operates by unloading the pump once the pressure reaches a predetermined set point and re-engaging it when the pressure falls to a value specified by the pilot valve's fixed percentage. It features a ventable relief that functions both as a main stage for unloading the pump and as an overpressure relief for the system. Additionally, it incorporates a simple circuit that softens the pump's unloading process, enhancing operational smoothness. The XQGFLANDF is line-mounted with specific mounting requirements, including three mounting holes threaded at .375-16 UNC 2B with a depth of .88 inches. The body of this valve is crafted from 6061-T651 aluminum, chosen for its balance of strength, cost-effectiveness, machinability, availability, and excellent corrosion resistance. While anodizing is often used to increase corrosion resistance and provide a hard wear surface, Sun Hydraulics opts not to anodize this product due to potential negative impacts on fatigue life and other logistical considerations. This valve assembly can be utilized in applications where additional volume may be needed for smoother transitions; an auxiliary port allows for attaching extra hose length if necessary. Users should be mindful of maximum system pressures when employing this manifold; those constructed from aluminum are limited to pressures not exceeding 3000 psi (210 bar), regardless of port size or type specified.

Description

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.

Body Type	Line 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 Quantity	33

Show FAQ

How big is a drop of hydraulic oil?	There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Why does Sun use 6061 aluminum?	6061-T651 is relatively strong, relatively inexpensive, difficult to machine, readily available in all shapes and sizes and very corrosion resistant. 2024 is stronger and machines beautifully, but is expensive and falls to pieces in a corrosive environment.
Why doesn't Sun anodize their aluminum bodies?	Reasons to anodize: To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion. Appearance (color). The 2 colors that would appeal to Sun would be blue or black. Unfortunately these are the colors that are hardest to do consistently. To provide a hard wear surface. Sun does not make parts-in-body valves. The manifold is just plumbing. We don't need a wear surface. Because everyone else does it. Bad reason. Reasons to not anodize: Cost. It's another process. Logistics. When you make tens of thousands of manifolds a month and you anodize hundreds, it's a problem. Consistency. See above. Stamping. After a body is anodized you cannot do any more stamping without making a mess.Inspection. Have you ever tried to look for burrs in a black anodized body? It's the old blackboard factory at night scenario. Torque. You will experience an increase in breakaway torque when removing items from an anodized manifold. Fatigue life. This is the best reason to not anodize. Fatigue failure is a very complex phenomenon. What it takes to initiate a crack is difficult to predict. What it takes to propagate a crack is readily defined. Anodizing produces a very thin, very hard, and very brittle surface on aluminum. The first time you pressurize an anodized aluminum manifold you have initiated fatigue cracks. Whether or not the stress is enough to propagate the cracks is a matter of pressure and manifold geometry. Anodizing an aluminum manifold grossly reduces the fatigue life by anywhere from 20% to 50%.
Direct acting or pilot operated - what do I use?	Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

Additional Resources

Notes:

Some applications may require additional volume for a smoother shift. Should this become necessary, an auxillary port has been provided to attach a length of hose for additional volume.
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.

SUN HYDRAULICSXQGFLANDF

Additional Resources

SUN HYDRAULICS
XQGFLANDF