SUN HYDRAULICS
RPGEOUN

$112.39 USD

SUN HYDRAULICS
Material:RPGEOUN
Model:RPGE-OUN
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 RPGEOUN (RPGEOUN) is a fast-acting, pilot-operated, balanced piston relief cartridge designed to protect hydraulic components from pressure transients. This normally closed, pressure-limiting valve opens quickly to manage pressure spikes by throttling flow when the inlet port reaches a specified setting. It features low pressure rise versus flow and rapid response, making it suitable for applications where speed is prioritized over smoothness. The valve's main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability under high-pressure conditions up to 5000 psi (350 bar). The RPGEOUN cartridge has a capacity of 50 gpm (200 L/min) and demonstrates typical response times of approximately 2 milliseconds. While it can accept maximum pressure at port 2 for cross-port relief circuits, users should consider potential spool leakage in such configurations. Notably, this model is not recommended for load-holding applications due to this leakage characteristic. The valve's design incorporates Sun's floating style construction to minimize internal binding risks due to installation torque or machining variations. This cartridge also includes an adjustment feature with five clockwise turns available to increase the setting, and it requires specific installation torques: 45-50 lbf ft (61-68 Nm) for the valve and 80-90 lbf in (9-10 Nm) for the locknut. Cartridges configured with EPDM seals are intended solely for systems using phosphate ester fluids; exposure to petroleum-based fluids will damage these seals. The RPGEOUN model weighs approximately 0.50 lb (0.25 kg) and uses a Viton seal kit identified as part number 990203006 for maintenance or replacement needs.

Description

Fast-acting, pilot-operated, balanced piston relief cartridges are normally closed, pressure-limiting valves used to protect hydraulics components from pressure transients. Fast opening and closing is gained at the expense of smoothness. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to limit the pressure rise. These valves have low pressure rise vs. flow and are very fast.

All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
Main stage orifice is protected by a 150 micron stainless steel screen.
Not suitable for use in load holding applications due to spool leakage.
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.
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	50 gpm200 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	2 ms2 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	3 in³/min.@1000 psi50 cc/min.@70 bar
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 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.

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.
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.

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Additional Resources

SUN HYDRAULICS
RPGEOUN