SUN HYDRAULICS
RVCSKWN

$122.40 USD

Tags:

SUN HYDRAULICS
Material:RVCSKWN
Model:RVCS-KWN
Summary:Cartridge

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.

***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 RVCSKWN (RVCSKWN) is a ventable, pilot-operated, balanced-poppet relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to the tank port when the inlet pressure reaches the set threshold, allowing flow throttling to maintain desired pressure levels. It features a vent port that enables remote control through other pilot or two-way valves. Known for its accuracy and low-pressure rise versus flow characteristics, this valve operates smoothly and quietly with moderate speed. Its design mitigates cavitation issues such as noise and manifold erosion. The RVCSKWN valve is equipped with EPDM seals suitable for phosphate ester fluid systems but should not be exposed to petroleum-based substances as they can damage the seals. It can handle maximum pressure at port 2, making it ideal for cross-port relief circuits. The remote pilot relief on port 3 vent allows control below the valve's set point. It is relatively insensitive to varying oil temperatures and contamination, with a main stage orifice protected by a 150-micron stainless steel screen, making it apt for load-holding applications. With a capacity of 15 gpm (60 L/min) and a maximum operating pressure of 5000 psi (350 bar), this valve offers reliable performance under demanding conditions. Its response time is typically around 2 milliseconds, while maximum leakage at reseat remains minimal at 10 drops/min (0.7 cc/min). The Sun floating style construction minimizes internal part binding risks due to excessive installation torque or machining variations in cavity/cartridge setups. This model requires specific installation torques and adjustments: a valve hex size of 7/8 in (22.2 mm), an installation torque of 30-35 lbf ft (41-47 Nm), an adjustment screw internal hex size of 5/32 in (4 mm), and a locknut torque of 80-90 lbf in (9-10 Nm). Weighing just .35 lb (0.15 kg), it also includes Viton seal kits under part number 990611006 for maintenance needs.

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.
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.
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.
Suitable for use in load holding applications.
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-11A
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	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	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	.35 lb0,15 kg
Seal kit - Cartridge	Viton: 990-611-006

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 HYDRAULICSRVCSKWN

Additional Resources

SUN HYDRAULICS
RVCSKWN