SUN HYDRAULICS
RPESLQV

$83.79 USD

SUN HYDRAULICS
Material:RPESLQV
Model:RPES-LQV
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 RPESLQV (RPESLQV) is a pilot-operated, balanced-poppet relief cartridge valve designed for precise pressure regulation in hydraulic systems. This normally closed valve begins to open to tank port 2 when the inlet port 1 pressure reaches the predetermined setting, effectively throttling flow to maintain desired pressure levels. Notable for its accuracy, smooth operation, and quick response time of approximately 7 milliseconds, this valve also boasts a low-pressure rise versus flow characteristic. Its design ensures immunity to cavitation-related issues like noise and manifold erosion due to internal modulation. The RPESLQV is highly versatile, accepting maximum pressure at port 2 and suitable for cross-port relief circuits. It remains reliable across varying oil temperatures and contamination levels, thanks to its main stage orifice being protected by a 150-micron stainless steel screen. This makes it ideal for load-holding applications. The back pressure on tank port 2 adds directly to the valve setting at a 1:1 ratio, allowing for precise adjustments. The valve features Sun's floating style construction to reduce the risk of internal part binding from excessive installation torque or machining variations. With an adjustable range facilitated by W and Y controls, users can specify settings with or without special configurations. The RPESLQV has a maximum operating pressure of 5000 psi (350 bar) and supports a flow capacity of up to 25 gpm (95 L/min). It is designed with practical installation specifications including a valve hex size of 7/8 in., an installation torque range of 30-35 lbf ft (41-47 Nm), and weighs .30 lb (.15 kg). For maintenance, it utilizes Viton seal kits with part number 990310006.

Description

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. These valves are accurate, smooth, quiet, fast, and have low pressure rise vs. flow.

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.
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.
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-10A
Series	1
Capacity	25 gpm95 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
Response Time - Typical	7 ms7 ms
Maximum Valve Leakage at 110 SUS (24 cSt)	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	.30 lb0,15 kg
Seal kit - Cartridge	Viton: 990-310-006

Show FAQ

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.
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.

SUN HYDRAULICSRPESLQV

Additional Resources

SUN HYDRAULICS
RPESLQV