SUN HYDRAULICS
RVIACHV

$493.32 USD

SUN HYDRAULICS
Material:RVIACHV
Model:RVIA-CHV
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 RVIACHV (RVIACHV) is a ventable, pilot-operated, balanced piston 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 predefined setting, effectively throttling flow to regulate pressure. It features a vent port that allows for remote control by other pilot or two-way valves, making it versatile and adaptable for various applications. Notably, this valve is accurate with low pressure rise versus flow, providing smooth and quiet operation with moderate response speed. The RVIACHV model accepts maximum pressure at port 2 and is suitable for use in cross-port relief circuits, although spool leakage should be considered in such configurations. This cartridge incorporates a 150-micron stainless steel screen to protect the main stage orifice and features Sun's floating style construction to minimize internal binding due to installation torque or machining variations. The valve is not suitable for load-holding applications due to spool leakage. For systems using phosphate ester fluids, cartridges configured with EPDM seals are recommended; exposure to petroleum-based fluids can damage these seals. With a capacity of 120 gpm (480 L/min) and a maximum operating pressure of 5000 psi (350 bar), this valve supports control pilot flow between 15-20 in\u00b3/min (0.25-0.33 L/min). It has a typical response time of 10 ms and a maximum valve leakage rate of 5 in\u00b3/min at 110 SUS (24 cSt) under 1000 psi (70 bar). Adjustment settings can be increased by turning clockwise up to five turns, with specific torque requirements for installation and adjustment components provided for optimal performance. This model weighs approximately 3.10 lb (1.40 kg) and includes necessary specifications for seal kit options and installation dimensions.

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.
Relief valve setting must always be higher than pilot valve setting.
Not suitable for use in load holding applications due to spool leakage.
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-19A
Series	4
Capacity	120 gpm480 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)	5 in³/min.@1000 psi80 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting	55
Valve Hex Size	1 5/8 in.41,3 mm
Valve Installation Torque	350 - 375 lbf ft474 - 508 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	3.10 lb1,40 kg
Seal kit - Cartridge	Viton: 990-019-006

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 HYDRAULICSRVIACHV

Additional Resources

SUN HYDRAULICS
RVIACHV