SUN HYDRAULICS
RBARDWV

SUN HYDRAULICS
Material:RBARDWV
Model:RBAR-DWV
Summary:Cartridge

Due to extremely high demand, please call 888-905-7411 for availability

***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 RBARDWV (RBARDWV) is a two-port, pilot-stage, air-controlled, direct-acting relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens a flow path from port 1 to port 2 when the inlet pressure at port 1 exceeds the force of the air signal. Optimized for pilot flow applications, it fits within Sun's T8A cavity and works seamlessly with their main stage pilot-operated valves. The design eliminates the need for separate pilot lines by allowing both control and primary functions to be accommodated within a single machined cavity. Ports 1 and 2 can handle pressures up to 5000 psi (350 bar), while the maximum pilot control port pressure is limited to 200 psi (14 bar). The valve features hardened poppet and seat components for consistent operation, low leakage rates of up to 15 drops/minute at 110 SUS (24 cSt), and superior wear characteristics. It offers two oil-to-air pilot ratios: 50:1 and 75:1, providing flexibility based on application needs. Installation requires specific torque values: the main stage valve should be torqued correctly before installing the T8A pilot control section into it. The Sun floating style construction minimizes internal part binding risks due to excessive installation torque or machining variations in cavity-cartridge interfaces. With a capacity of 2.5 gpm (10 L/min), this valve is robust enough for high-pressure environments while maintaining precise control over system pressures.

Description

Two-port, pilot-stage, air-controlled, direct-acting relief cartridges are normally closed pressure regulating valves. When the pressure at port 1 (inlet) is sufficient to overcome the force due to the air signal, a flow path is opened from port 1 to port 2 (tank). These cartridges are designed for pilot flow applications and utilize Sun's T-8A cavity so they can be used in conjunction with Sun's pilot-operated, main-stage valves.

Utilizes the Sun T-8A 2-port cavity making it the ideal choice to use in conjunction with Sun's main stage pilot or vent-to-operate cartridges. Separate pilot lines are eliminated and only one cavity needs to be machined to accommodate both the control and primary function. Note: All 2-position, 2-way pilot stage control cartridges utilize the same cavity and are physically interchangeable. Functionality is the only consideration.
Note: The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required torque value.
Different pilot control port options are available. See Option Selection for details.
Ports 1 and 2 may be pressured to 5000 psi (350 bar).
Hardened poppet and seat provide consistent operation, low leakage rates and superior wear characteristics.
Two different oil-to-air pilot ratios are available; 50:1 and 75:1. See Option Selection.
Maximum pilot control port pressure is 200 psi (14 bar).
Backpressure at port 2 increases the relief setting by a .43 multiplier.
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-8A
Series	P
Capacity	2.5 gpm10 L/min.
Maximum Operating Pressure	5000 psi350 bar
Maximum Valve Leakage at 110 SUS (24 cSt)	15 drops/min.1 cc/min.
Maximum Pilot Pressure	150 psi10,5 bar
Pilot Control Port	See Control OptionsSee Control Options
Valve Installation Torque	20 - 25 lbf ft27 - 33 Nm
Seal kit - Cartridge	Viton: 990-608-006

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 HYDRAULICSRBARDWV

Additional Resources

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RBARDWV