SUN HYDRAULICS
RELIEF CART
RBAELAN

$68.00

SUN HYDRAULICS
Material:RBAELAN
Model:RBAE-LAN
Summary:Cartridge

Quantity in stock: 12

***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 RBAELAN (RBAELAN) is a two-port, pilot-stage, direct-acting relief cartridge designed to function as a fully adjustable, normally closed pressure regulating valve. It operates by opening a flow path from port 1 to port 2 when the inlet pressure at port 1 surpasses the valve's spring force setting. This model utilizes the Sun T-8A two-port cavity, making it an optimal choice for use with Sun's main stage pilot or vent-to-operate cartridges. A significant advantage is that it eliminates the need for separate pilot lines, requiring only one cavity to accommodate both control and primary functions. The valve features hardened poppet and seat components for consistent operation, minimal leakage, and enhanced wear resistance. It can withstand pressures up to 5000 psi (350 bar) at both ports 1 and 2. The RBAELAN incorporates Sun's floating style construction to reduce the risk of internal parts binding due to excessive installation torque or machining variations in the cavity/cartridge. Cartridges fitted with EPDM seals are suitable for systems using phosphate ester fluids but are incompatible with petroleum-based fluids. The valve offers a capacity of 2.5 gpm (10 L/min) and has a typical response time of 2 milliseconds, with maximum leakage rated at 15 drops/minute (1 cc/min). Installation requires specific torque settings: the main stage valve should be installed first followed by the T8A pilot control section. The adjustment screw has an internal hex size of 5/32 inches (4 mm), while the locknut hex size is 9/16 inches (15 mm), requiring a torque of 80-90 lbf-in (9-10 Nm).

Description

Two-port, pilot-stage, direct-acting relief cartridges are fully adjustable, normally closed pressure regulating valves. When the pressure at port 1 (inlet) is sufficient to overcome the spring force (valve setting), a flow path is opened from port 1 to port 2 (tank).

Utilizes the Sun T-8A 2-port cavity making it the ideal choice to use in conjunction with Sun's main stage pilot or vent-to-operate cartridges. Separate pilot lines are eliminated and only one cavity needs to be machined to accommodate both the control and primary function. Note: All 2-position, 2-way pilot stage control cartridges utilize the same cavity and are physically interchangeable. Functionality is the only consideration.
Note: The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required torque value.
Ports 1 and 2 may be pressured to 5000 psi (350 bar).
Hardened poppet and seat provide consistent operation, low leakage rates and superior wear characteristics.
Backpressure at port 2 (outlet) is directly additive to the pressure setting at port 1 (inlet).
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.
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-8A
Series	P
Capacity	2.5 gpm10 L/min.
Factory Pressure Settings Established at	2 in³/min.30 cc/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	2 ms2 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	15 drops/min.1 cc/min.
Valve Hex Size	7/8 in.22,2 mm
Valve Installation Torque	20 - 25 lbf ft27 - 33 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
Seal kit - Cartridge	Viton: 990-608-006

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Additional Resources

Notes:

For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 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.

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Additional Resources

SUN HYDRAULICS
RELIEF CART
RBAELAN