SUN HYDRAULICS
RPICQEV

$201.04 USD

SUN HYDRAULICS
Material:RPICQEV
Model:RPIC-QEV
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 RPICQEV (RPICQEV) is a pilot-operated, balanced piston relief cartridge designed to regulate pressure in hydraulic systems. This valve remains normally closed and opens to the tank port when the inlet pressure reaches its set point, ensuring accurate pressure regulation with minimal noise and smooth operation. It is capable of accepting maximum pressure at port 2, making it suitable for cross-port relief circuits, though spool leakage should be considered in such applications. The valve features a main stage orifice protected by a 150-micron stainless steel screen but is not recommended for load-holding applications due to potential leakage. The RPICQEV model offers flexibility with adjustable settings via W or Y controls and can be configured with EPDM seals for compatibility with phosphate ester fluids. The valve's construction incorporates Sun's floating style design to prevent internal part binding caused by installation torque or machining variations. It is corrosion-resistant, available with external stainless steel or zinc-nickel plated components as indicated by model code suffixes AP or LH. With a capacity of 100 gpm (380 L/min) and a maximum operating pressure of 5000 psi (350 bar), this cartridge valve demonstrates reliable performance in demanding environments. Its typical response time is about 10 milliseconds, and it has a maximum leakage rate of 4 in\u00b3/min at 1000 psi (65 cc/min at 70 bar). Installation requires specific torque settings: the valve hex size is 1-1/4 inches (31.8 mm), and it should be installed with a torque of 150-160 lbf ft (203-217 Nm). Adjustment and locknut hex sizes are specified at 5/32 inches (4 mm) and 9/16 inches (15 mm), respectively, with locknut torque ranging from 80-90 lbf in (9-10 Nm). The valve weighs approximately 1.20 lbs (0.55 kg) and utilizes Viton seal kits for optimal performance.

Description

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

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.
All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
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.
Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
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-16A
Series	3
Capacity	100 gpm380 L/min.
Factory Pressure Settings Established at	4 gpm15 L/min.
Maximum Operating Pressure	5000 psi350 bar
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	1.20 lb0,55 kg
Seal kit - Cartridge	Viton: 990-016-006

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 HYDRAULICSRPICQEV

Additional Resources

SUN HYDRAULICS
RPICQEV