SUN HYDRAULICS
RVITLWN

$804.40 USD

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SUN HYDRAULICS
Material:RVITLWN
Model:RVIT-LWN
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 RVITLWN (RVITLWN) is a ventable, pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This 3-port valve features a vent port that allows for remote control by other pilot or 2-way valves. The valve is equipped with an adjustment screw to set the maximum relief and minimum threshold settings, making it versatile for various hydraulic applications. It is designed to mitigate issues related to cavitation, such as noise and manifold erosion, due to its internal modulating mechanism. Suitable for cross-port relief circuits, the RVITLWN accepts maximum pressure at port 2 but is not ideal for load-holding applications. When inlet pressure surpasses the set threshold at port 1, the valve opens to tank port 2 while the pilot section steadily increases the setting by compressing the spring until it reaches a mechanical stop. This feature provides protection for hydrostatic drives by reducing jerks from sudden reversals and can mimic ramp characteristics when used with switching devices. The valve's design allows small power units to start against an anti-shock relief, extending pump life. Backpressure on tank port 2 directly adds to the valve setting in a 1:1 ratio, ensuring precise control over operating conditions. The main stage orifice has protective measures against contamination and incorporates Sun's floating style construction to reduce binding risks from excessive torque or machining variations. With a capacity of 120 gpm (480 L/min) and a maximum operating pressure of 5000 psi (350 bar), this model ensures robust performance in demanding environments.

Description

Ventable, pilot-operated, anti shock relief cartridges limit maximum system pressure and also limit the rate of pressure rise. The valve opens and then ramps closed at a constant speed, independent of settings and flows. These 3 port valves include a vent port (port 3) that connects between the main piston and the pilot stage to provide for remote control by other pilot or 2-way valves. The adjust screw determines the maximum (relief) setting and the minimum (threshold) setting.

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.
A remote pilot relief on port 3 (vent) will control the valve below its own setting.
Not suitable for use in load holding applications.
When pressure at the inlet (port 1) exceeds the threshold setting, the valve opens to tank (port 2). The pilot section moves forward at a steady rate, increasing the setting by compressing the pilot spring. Maximum setting is achieved when the pilot section reaches a mechanical stop.
Valve provides protection for hydrostatic drives by reducing the jerk caused by sudden reversals. The valve is suitable for cross-port applications.
When used with a switching device, the valve can provide the ramp characteristic typically provided by proportional valves.
Small power units can be started against an anti shock relief to provide longer pump life.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
The main stage orifice is protected against contamination.
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-19A
Series	4
Capacity	120 gpm480 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Control Pilot Flow	15 - 20 in³/min.0,25 - 0,33 L/min.
Response Time - Typical	2 ms2 ms
Pressure Ramp Up Time	400 - 850 ms400 - 850 ms
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 5/8 in.41,3 mm
Valve Installation Torque	350 - 375 lbf ft474 - 508 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	3.10 lb1,40 kg
Seal kit - Cartridge	Viton: 990-219-006

Show FAQ

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.
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.

SUN HYDRAULICSRVITLWN

Additional Resources

SUN HYDRAULICS
RVITLWN