SUN HYDRAULICS
RPGEFCN

$94.51 USD

SUN HYDRAULICS
Material:RPGEFCN
Model:RPGE-FCN
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 RPGEFCN (Material Number: RPGEFCN) 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 when the pressure at inlet port 1 reaches its set point, directing flow to tank port 2 to limit pressure rise. It features a low pressure rise versus flow and rapid response time of approximately 2 milliseconds. The valve is built for interchangeability across all 2-port relief cartridges with similar flow paths and cavity sizes. Its main stage orifice is shielded by a 150-micron stainless steel screen, ensuring durability and reliability in operation. The RPGEFCN model supports maximum operating pressures up to 5000 psi (350 bar) and has a capacity of 50 gpm (200 L/min). It is suitable for use in cross port relief circuits but not recommended for load holding applications due to potential spool leakage. The cartridge incorporates Sun's floating style construction to minimize internal binding risks caused by installation torque or cavity machining variations. This model is equipped with EPDM seals, making it compatible with systems using phosphate ester fluids while being vulnerable to petroleum-based substances. The valve's back pressure at tank port 2 directly adds to the valve setting at a 1:1 ratio, affecting performance accordingly. Installation specifications include a valve hex size of 1-1/8 inches (28.6 mm), an installation torque range of 45-50 lbf ft (61-68 Nm), and an adjustment screw internal hex size of 5/32 inches (4 mm). The RPGEFCN model weighs approximately .50 lb (.25 kg) and comes with a Viton seal kit option for enhanced compatibility in various applications.

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
RPGEFCN