SUN HYDRAULICS
RPCCLNN/LH

$83.80 USD

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SUN HYDRAULICS
Material:RPCCLNN/LH
Model:RPCC-LNN/LH
Summary:Cartridge

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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 RPCCLNN/LH (RPCCLNN/LH) is a pilot-operated, balanced-piston relief cartridge designed as a normally closed pressure regulating valve. This valve opens to tank port 2 once the inlet port 1 pressure reaches the preset level, effectively throttling flow to maintain the desired pressure. Known for its accuracy, low-pressure rise versus flow, smooth operation, and moderate speed, this relief cartridge is suitable for various applications where precise pressure regulation is essential. It features interchangeable compatibility with other 2-port relief cartridges of the same frame size and flow path. The valve can handle maximum pressures at port 2, making it suitable for cross-port relief circuits while considering possible spool leakage. The RPCCLNN/LH model has a minimum setting of 75 psi (5 bar) across all spring ranges and is not recommended for load-holding applications due to potential spool leakage. The back pressure on tank port 2 directly affects the valve setting at a 1:1 ratio. It includes a main stage orifice protected against contamination and incorporates Sun's floating style construction to prevent internal binding from excessive installation torque or machining variations. This cartridge fits cavity T-162A with a series capacity of 12 gpm (45 L/min) and operates up to a maximum pressure of 5000 psi (350 bar). It typically responds in about 10 milliseconds with minimal leakage at standard conditions. Adjustment involves up to five clockwise turns to increase settings, using an internal hex size of 5/32 inches (4 mm), while installation requires specific torque values for optimal performance. Additionally, cartridges configured with EPDM seals are compatible with phosphate ester fluids but may be damaged by petroleum-based substances.

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

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.
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.

SUN HYDRAULICSRPCCLNN/LH

Additional Resources

SUN HYDRAULICS
RPCCLNN/LH