SUN HYDRAULICS
RPCCCCN

$62.34 USD

SUN HYDRAULICS
Material:RPCCCCN
Model:RPCC-CCN
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 RPCCCCN (RPCCCCN) is a pilot-operated, balanced-piston relief cartridge designed as a normally closed pressure regulating valve. It becomes operational when the inlet port pressure reaches the specified valve setting, gradually opening to the tank port and throttling flow to maintain pressure regulation. Known for its accuracy and low-pressure rise versus flow characteristics, this valve operates smoothly and quietly with moderate speed. It is interchangeable with other 2-port relief cartridges of the same frame size, except pilot reliefs, sharing identical flow paths and cavity dimensions. The valve can handle maximum pressure at port 2, suitable for cross-port relief circuits; however, users should consider spool leakage in such applications. The minimum setting for all spring ranges is 75 psi (5 bar), but it is not ideal for load-holding applications due to potential spool leakage. Back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The main stage orifice is safeguarded against contamination, ensuring durability and reliable performance. For systems using phosphate ester fluids, cartridges configured with EPDM seals are recommended; exposure to petroleum-based substances could damage these seals. The Sun floating style construction minimizes internal part binding risks due to excessive installation torque or machining variations. With a capacity of 12 gpm (45 L/min) and maximum operating pressure of 5000 psi (350 bar), this model has a typical response time of 10 ms and minimal valve leakage at standard viscosity conditions. Adjustments can be made by turning clockwise up to five times to increase settings. The RPCCCCN's compact design features specific installation torque requirements and seal kit options for maintenance flexibility.

Description

Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately 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.
Minimum setting is 75 psi (5 bar) for all spring ranges.
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.
The main stage orifice is protected against contamination.
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-162A
Series	0
Capacity	12 gpm45 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	10 ms10 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	2 in³/min.@1000 psi30 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	3/4 in.19,1 mm
Valve Installation Torque	20 - 25 lbf ft27 - 33 Nm
Adjustment Screw Internal Hex Size	5/32 in.4 mm
Locknut Hex Size	1/2 in.12,7 mm
Locknut Torque	80 - 90 lbf in.9 - 10 Nm
Model Weight	.20 lb0,10 kg
Seal kit - Cartridge	Viton: 990-162-006

Show FAQ

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.

SUN HYDRAULICSRPCCCCN

Additional Resources

SUN HYDRAULICS
RPCCCCN