SUN HYDRAULICS
RVISCWN

$528.47 USD

SUN HYDRAULICS
Material:RVISCWN
Model:RVIS-CWN
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 RVISCWN (RVISCWN) is a ventable, pilot-operated, balanced-poppet relief cartridge designed for precise pressure regulation. This valve remains normally closed until the inlet port pressure reaches its set point, at which it opens to allow flow to the tank port, thereby regulating pressure. It features a vent port that facilitates remote control by other pilot or two-way valves. Known for its accuracy and low-pressure rise versus flow, the RVISCWN operates smoothly and quietly while being moderately fast. The internal modulating mechanism makes it resistant to cavitation-related issues such as noise and manifold erosion. This valve is suitable for load-holding applications with zero-leak valving on the vent port and can handle maximum pressure at port 2, making it ideal for cross-port relief circuits. It allows remote pilot relief control on the vent port to manage valve operation below its own setting. Insensitive to variations in oil temperature and contamination, the main stage orifice is protected by a 150-micron stainless steel screen. The back pressure on the tank port directly adds to the valve setting at a 1:1 ratio. Incorporating Sun's floating style construction minimizes internal part binding due to excessive installation torque or machining variations. It fits into a T-19A cavity with a capacity of 120 gpm (480 L/min) and operates under a maximum pressure of 5000 psi (350 bar). The typical response time is 2 ms with minimal leakage at reseat conditions. Installation requires specific torque settings for optimal performance, and adjustments can be made via an internal hex screw. The unit weighs approximately 3.10 lb (1.40 kg) and uses Viton seal kits for durability in various environments.

Description

Ventable, pilot-operated, balanced-poppet 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.

Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
Suitable for use in load holding applications, providing that any valving on the vent port (port 3) is zero leak.
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.
Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
Main stage orifice is protected by a 150 micron stainless steel screen.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
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
Maximum Valve Leakage at Reseat	10 drops/min.0,7 cc/min.
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 HYDRAULICSRVISCWN

Additional Resources

SUN HYDRAULICS
RVISCWN