SUN HYDRAULICS
FNJ

SUN HYDRAULICS
Material:FNJ
Summary:Manifold

Due to extremely high demand, please call 877-366-7226 for availability

***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 FNJ (Material Number: FNJ) is a robust and versatile line mount body designed for hydraulic applications. This component features a ninety-degree design with a reverse flow check, making it suitable for systems requiring directional flow control. The FNJ model accommodates one open cavity with the T10A cavity type and includes two mounting holes, each with a diameter of .28 inches (7.1 mm). These holes are drilled through the body, ensuring secure installation. The port size of SAE 8 enhances compatibility with various hydraulic configurations, providing reliable fluid connectivity. Constructed from 6061T651 aluminum, the FNJ model offers excellent corrosion resistance and durability, essential for demanding environments. This material choice ensures that the manifold can withstand pressures up to 3000 psi (210 bar), aligning with its intended use in moderate pressure systems. While anodizing is not applied to this product due to considerations related to cost, logistics, and potential impact on fatigue life, the inherent properties of 6061 aluminum provide sufficient protection against environmental factors. The FNJ line mount body is ideal for applications where compact design and efficient flow management are required. Its straightforward interface and robust construction make it a reliable choice for hydraulic systems that demand consistent performance under varying conditions.

Description

Body Type	Line mountLine mount
Interface	NoneNone
Body Features	Ninety degree with reverse flow checkNinety degree with reverse flow check
Mounting Hole Diameter	.28 in.7,1 mm
Mounting Hole Depth	ThroughThrough
Mounting Hole Quantity	22
Open Cavities	11
Cavity	T-10A
Port Size	SAE 8SAE 8

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%.

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.

SUN HYDRAULICSFNJ

Additional Resources

SUN HYDRAULICS
FNJ