SUN HYDRAULICS
RBAALDN

$90.84 USD

SUN HYDRAULICS
Material:RBAALDN
Model:RBAA-LDN
Summary:Cartridge

Quantity in stock: 0

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***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 RBAALDN (RBAALDN) is a direct-acting pilot relief cartridge designed to remotely control the pressure setting of other pilot-operated valves. This model is suitable for load-holding applications and features a main stage orifice protected by a 150-micron stainless steel screen, ensuring durability and reliability in various environments. The valve's capacity is limited to pilot flow, making it essential to use in conjunction with higher flow valves. It operates with a maximum pressure of 5000 psi (350 bar) and offers a typical response time of 2 milliseconds. The RBAALDN model incorporates Sun's floating style construction, minimizing the risk of internal parts binding due to excessive installation torque or machining variations. The valve includes options for corrosion resistance, available with external stainless steel components (suffix AP) or external zinc-nickel plated components (suffix LH), making it ideal for corrosive environments. It also features an adjustable setting range through W or Y controls, with the option for special settings that represent the maximum setting of the valve. The cartridge is configured with EPDM seals suitable for systems using phosphate ester fluids; however, exposure to petroleum-based fluids can damage these seals. Installation specifications include a cavity T-3A series 2 design, with a capacity of 0.5 gpm (2 L/min). It requires an installation torque between 45-50 lbf ft (61-68 Nm), and utilizes an internal hex size adjustment screw of 5/32 inch (4 mm). The locknut has a hex size of 9/16 inch (15 mm) and should be torqued between 80-90 lbf in (9-10 Nm). This versatile component weighs approximately 0.50 lb (0.25 kg) and is compatible with Viton seal kits identified by part number 990203006.

Description

Direct-acting, pilot relief cartridges are used to remotely control the pressure setting of other pilot-operated valves. Because capacity is limited to pilot flow, these valves should be used with other higher flow valves.

Main stage orifice is protected by a 150 micron stainless steel screen.
Suitable for use in load holding applications.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

Cavity	T-3A
Series	2
Capacity	.5 gpm2 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	2 ms2 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	5 drops/min.0,3 cc/min.
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 1/8 in.28,6 mm
Valve Installation Torque	45 - 50 lbf ft61 - 68 Nm
Adjustment Screw Internal Hex Size	5/32 in.4 mm
Locknut Hex Size	9/16 in.15 mm
Locknut Torque	80 - 90 lbf in.9 - 10 Nm
Model Weight	.50 lb0,25 kg
Seal kit - Cartridge	Viton: 990-203-006

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Additional Resources

Notes:

For Series 2 cartridges configured with an O control (panel mount handknob), a 1.00 in. (25,4 mm) diameter hole is required in the panel.

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.
Where would I use a kick-down relief?	One graphic example is on a portable grain auger for silos. When the farmer gets caught in the auger the kick-down relief trips and allows him to escape.
What are the tolerances on pressure settings for Sun's pressure control valves?	Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.
How big is a drop of hydraulic oil?	There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Can I use a kick-down relief for my system relief?	Maybe not. We build in a good amount of overlap in the kick-down reliefs to prevent false tripping. This means they are not as fast as our standard pilot-operated reliefs. A direct-acting relief valve set just above the kick-down relief valve would be good insurance.

SUN HYDRAULICSRBAALDN

Additional Resources

SUN HYDRAULICS
RBAALDN