SUN HYDRAULICS
RPESKNN

$91.24 USD

SUN HYDRAULICS
Material:RPESKNN
Model:RPES-KNN
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 RPESKNN (RPESKNN) is a pilot-operated, balanced-poppet relief cartridge valve designed to regulate pressure in hydraulic systems. This normally closed valve opens to the tank port when inlet pressure reaches the set level, throttling flow to maintain consistent pressure. Known for its accuracy, smooth operation, and fast response time of approximately 7 milliseconds, the RPESKNN is also quiet and exhibits low pressure rise relative to flow. It features a stainless steel screen protecting the main stage orifice, ensuring durability against oil-borne contaminants and varying temperatures. The valve is suitable for load-holding applications and can handle maximum pressure at port 2, making it ideal for cross-port relief circuits. Its design incorporates Sun's floating style construction to prevent internal binding due to installation torque or machining variations. The RPESKNN allows adjustments through W or Y controls with a full range unless a special setting is specified. The valve is compact with a capacity of 25 gpm (95 L/min) and operates at a maximum pressure of 5000 psi (350 bar). It has minimal leakage, approximately 10 drops per minute at 110 SUS (24 cSt), and requires specific installation torques for optimal performance. The adjustment screw features an internal hex size of 5/32 inches (4 mm), while the locknut has a hex size of 9/16 inches (15 mm) with torque specifications between 80-90 lbf-in (9-10 Nm). Weighing only .30 lb (.15 kg), this cartridge valve includes a Viton seal kit for enhanced sealing capabilities in diverse environments.

Description

Pilot-operated, balanced-poppet 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, smooth, quiet, fast, and have low pressure rise vs. flow.

Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
Main stage orifice is protected by a 150 micron stainless steel screen.
Suitable for use in load holding applications.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
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-10A
Series	1
Capacity	25 gpm95 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	7 ms7 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	10 drops/min.0,7 cc/min.
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	7/8 in.22,2 mm
Valve Installation Torque	30 - 35 lbf ft41 - 47 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	.30 lb0,15 kg
Seal kit - Cartridge	Viton: 990-310-006

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 HYDRAULICSRPESKNN

Additional Resources

SUN HYDRAULICS
RPESKNN