SUN HYDRAULICS
RVCDCWV

$136.00 USD

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SUN HYDRAULICS
Material:RVCDCWV
Model:RVCD-CWV
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 RVCDCWV (RVCDCWV) is a ventable, pilot-operated, balanced piston relief cartridge with an external drain, designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to the tank port when the inlet pressure reaches the set point, effectively throttling flow to maintain desired pressure levels. It features a vent port for remote control and a drain port that ensures insensitivity to back pressure. The RVCDCWV is known for its accuracy, smooth and quiet operation, and moderate response speed. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits, although spool leakage should be considered in such applications. The valve's main stage orifice is safeguarded by a 150-micron stainless steel screen, but it is not recommended for load-holding applications due to potential leakage. The valve setting can be influenced directly by the pressure at port 4 at a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). Configurations with EPDM seals are intended for systems using phosphate ester fluids; exposure to petroleum-based substances could damage these seals. The RVCDCWV incorporates Sun's floating style construction to minimize internal binding risks due to installation torque or machining variations. It has a capacity of 15 gpm (60 L/min) and operates at pressures up to 5000 psi (350 bar), with factory settings established at 4 gpm (15 L/min). The control pilot flow ranges between 7-10 in\u00b3/min (0.11-0.16 L/min), with typical response times around 10 ms. Valve adjustments require specific torque specifications and tools as outlined in its technical data sheet.

Description

Ventable, pilot-operated, balanced piston relief cartridges with external drain 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 and a drain (port 4) that makes them insensitive to back pressure. 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.
Pressure at port 4 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
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.
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.
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-21A
Series	1
Capacity	15 gpm60 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Control Pilot Flow	7 - 10 in³/min.0,11 - 0,16 L/min.
Response Time - Typical	10 ms10 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	2 in³/min.@1000 psi30 cc/min.@70 bar
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	.40 lb0,20 kg
Seal kit - Cartridge	Viton: 990-021-006

Show FAQ

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 HYDRAULICSRVCDCWV

Additional Resources

SUN HYDRAULICS
RVCDCWV