SUN HYDRAULICS
RVGALKN

$223.58 USD

SUN HYDRAULICS
Material:RVGALKN
Model:RVGA-LKN
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 RVGALKN (Material Number: RVGALKN) is a ventable, pilot-operated, balanced piston relief cartridge designed for precise pressure regulation. 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 that allows for remote control through other pilot or 2-way valves. Known for its accuracy and low-pressure rise versus flow characteristics, this valve operates smoothly and quietly with moderate speed. With a maximum operating pressure of 5000 psi (350 bar) and a capacity of 60 gpm (240 L/min), it is suitable for cross-port relief circuits but should not be used in load-holding applications due to spool leakage considerations. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and reliability. Notably, cartridges configured with EPDM seals are compatible with systems using phosphate ester fluids but are vulnerable to damage from petroleum-based substances. The Sun floating style construction minimizes potential binding of internal parts during installation or due to machining variations. The RVGALKN offers an adjustment range facilitated by an internal hex screw and locknut system, allowing precise setting adjustments with a typical response time of 10 ms. It incorporates features such as back pressure on the tank port being directly additive to the valve setting at a 1:1 ratio. The valve's installation torque ranges between 150-160 lbf ft (203-217 Nm), making it robust for demanding applications. This model weighs approximately 1.60 lb (0.70 kg) and includes a seal kit option with Viton material (990017006) for enhanced performance in specific environments.

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-17A
Series	3
Capacity	60 gpm240 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	10 ms10 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	4 in³/min.@1000 psi65 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 1/4 in.31,8 mm
Valve Installation Torque	150 - 160 lbf ft203 - 217 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	1.60 lb0,70 kg
Seal kit - Cartridge	Viton: 990-017-006

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 HYDRAULICSRVGALKN

Additional Resources

SUN HYDRAULICS
RVGALKN