SUN HYDRAULICS
RDDA3CN

$61.85 USD

SUN HYDRAULICS
Material:RDDA3CN
Model:RDDA-3CN
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 RDDA3CN (RDDA3CN) is a non-adjustable direct-acting relief cartridge designed to protect hydraulic components from pressure transients by limiting pressure rise. It remains normally closed and opens to the tank port when the inlet pressure reaches the valve setting, providing smooth, quiet operation with essentially zero leakage. The RDDA3CN is dirt-tolerant, immune to silting, and offers fast response times. This valve is factory set and tamper-proof, requiring customers to specify their desired settings. It can handle maximum pressure at port 2 and is suitable for cross-port relief circuits and load-holding applications. The valve's performance remains relatively unaffected by varying oil temperatures or contamination. The RDDA3CN features Sun's floating style construction to reduce internal binding risks due to installation torque or machining variations. It fits in a T-10A cavity with a series 1 capacity of 25 gpm (95 L/min) and operates at a maximum pressure of 5000 psi (350 bar). Typical response time is around 2 milliseconds with maximum valve leakage at reseat being 10 drops/min (0.7 cc/min). The valve reseats at 90% of its setting. Its hex size measures 7/8 inch (22.2 mm), with an installation torque range of 30-35 lbf ft (41-47 Nm), and it weighs approximately .30 lb (.15 kg). The seal kit for this cartridge uses Viton material, identified by part number 990310006.

Description

Non-adjustable direct-acting relief cartridges are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. 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 are smooth and quiet, essentially zero leak, dirt tolerant, immune to silting and are very fast.

Customer must specfy setting. The valve will be factory set and is tamper proof.
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.
Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve repeatability.
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.
All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
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	2 ms2 ms
Maximum Valve Leakage at Reseat	10 drops/min.0,7 cc/min.
Reseat	>90% of setting>90% of setting
Valve Hex Size	7/8 in.22,2 mm
Valve Installation Torque	30 - 35 lbf ft41 - 47 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 HYDRAULICSRDDA3CN

Additional Resources

SUN HYDRAULICS
RDDA3CN