SUN HYDRAULICS
RVEALQV

$121.20 USD

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SUN HYDRAULICS
Material:RVEALQV
Model:RVEA-LQV
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 RVEALQV (RVEALQV) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the inlet pressure reaches the preset level, at which point it opens to the tank port to throttle flow and maintain the desired pressure. The RVEALQV model features a vent port that allows for remote control by other pilot or two-way valves, enhancing its versatility in various applications. It is known for its accuracy, smooth operation, low-pressure rise versus flow characteristics, and moderate response speed. This relief cartridge is particularly suitable for cross-port relief circuits as it can handle maximum pressure at port 2; however, users should consider spool leakage when employing it in such circuits. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability. It's important to note that this valve is not recommended for load-holding applications due to potential spool leakage issues. The RVEALQV model incorporates Sun's floating style construction to minimize internal part binding caused by excessive installation torque or machining variations. It supports a maximum operating pressure of 5000 psi (350 bar) and has a capacity of 30 gpm (120 L/min). The cartridge's response time is typically around 10 ms, with maximum valve leakage at specified conditions being 3 in\u00b3/min (50 cc/min). For systems using phosphate ester fluids, cartridges configured with EPDM seals are available; however, these seals may be damaged by petroleum-based substances. Installation requires specific torque settings: the valve hex size is 1-1/8 inches (28.6 mm), with an installation torque of 45-50 lbf-ft (61-68 Nm). Additionally, adjustment screw and locknut specifications are provided to ensure proper setup and maintenance of the valve within hydraulic systems.

Description

Ventable, 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. They provide a vent port (port 3) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.

A remote pilot relief on port 3 (vent) will control the valve below its own setting.
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.
Main stage orifice is protected by a 150 micron stainless steel screen.
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.
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-2A
Series	2
Capacity	30 gpm120 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Control Pilot Flow	10 - 15 in³/min.0,16 - 0,25 L/min.
Response Time - Typical	10 ms10 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	3 in³/min.@1000 psi50 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 1/8 in.28,6 mm
Valve Installation Torque	45 - 50 lbf ft61 - 68 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	.70 lb0,30 kg
Seal kit - Cartridge	Viton: 990-202-006

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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 HYDRAULICSRVEALQV

Additional Resources

SUN HYDRAULICS
RVEALQV