SUN HYDRAULICS
RBACYDN

$87.17 USD

SUN HYDRAULICS
Material:RBACYDN
Model:RBAC-YDN
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 RBACYDN (RBACYDN) is a direct-acting, pilot relief cartridge designed to remotely control the pressure settings of other pilot-operated valves. This model is specifically engineered for use in systems where pilot flow capacity is required, making it essential to pair with higher flow valves for optimal performance. Notably, the RBACYDN comes equipped with EPDM seals, which are suitable for phosphate ester fluid systems but can be damaged by petroleum-based fluids. The valve features a main stage orifice shielded by a 150-micron stainless steel screen, ensuring durability and reliability in load-holding applications. This cartridge valve offers a maximum operating pressure of 5000 psi (350 bar) and a typical response time of 2 milliseconds. It has a capacity of 0.25 gallons per minute (1 liter per minute) and allows for adjustment via the W or Y controls across its full range unless specified otherwise. The valve's construction incorporates Sun's floating style design to prevent internal binding from installation torque or machining variations. The RBACYDN is corrosion-resistant, with options for external stainless steel components (suffix AP) or zinc-nickel plated components (suffix LH). It requires an installation torque between 30-35 lbf ft (41-47 Nm), with an adjustment screw internal hex size of 5/32 inch (4 mm). The model weighs approximately 0.30 lb (0.15 kg). Additionally, this valve can be used effectively in environments that demand robust performance and minimal leakage\u2014measured at a maximum of 5 drops per minute at 110 SUS (24 cSt).

Description

Direct-acting, pilot relief cartridges are used to remotely control the pressure setting of other pilot-operated valves. Because capacity is limited to pilot flow, these valves should be used with other higher flow valves.

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.
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.
Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
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 gpm1 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	2 ms2 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	5 drops/min.0,3 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: 990-010-006

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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.

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.
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.

SUN HYDRAULICSRBACYDN

Additional Resources

SUN HYDRAULICS
RBACYDN