SUN HYDRAULICS
RPKC8WV
$401.29 USD
- SUN HYDRAULICS
- Material:RPKC8WV
- Model:RPKC-8WV
- Summary:Cartridge
Quantity in stock: 0
***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 RPKC8WV (RPKC8WV) is a normally closed modulating valve element featuring an integral pilot control cavity, designed with a balanced piston configuration. This valve is capable of accepting any T8A pressure control cartridge, allowing it to regulate pressure by throttling flow from inlet port 1 to tank port 2 once the pressure reaches the pilot control cartridge's setting. The difference in pressure between these ports is determined by the pilot cartridge's setting. Notably, this valve can handle maximum pressure at port 2, making it suitable for cross port relief circuits, although it is not recommended for load holding applications due to potential spool leakage. The main stage orifice is protected by a 150-micron stainless steel screen, and back pressure on tank port 2 will directly add to the valve setting at a 1:1 ratio. The RPKC8WV model incorporates Sun's floating style construction to prevent internal part binding from excessive installation torque or machining variations. It supports various pilot control options, including electroproportional, solenoid, air pilot, and hydraulic pilot operations\u2014these are sold separately and can be incorporated directly into the relief cartridge via the T8A cavity. For systems using phosphate ester fluids, cartridges with EPDM seals are available; however, exposure to petroleum-based fluids could damage these seals. With a capacity of up to 200 gpm (760 L/min) and a maximum operating pressure of 5000 psi (350 bar), this valve offers robust performance in demanding applications. The installation requires specific torque values for both the main stage and T8A pilot control valves. The RPKC8WV weighs approximately 2.50 lb (1.15 kg) and uses Viton seal kits identified as part number 990018006 for optimal sealing performance.
The Sun Hydraulics RPKC8WV (RPKC8WV) is a normally closed modulating valve element featuring an integral pilot control cavity, designed with a balanced piston configuration. This valve is capable of accepting any T8A pressure control cartridge, allowing it to regulate pressure by throttling flow from inlet port 1 to tank port 2 once the pressure reaches the pilot control cartridge's setting. The difference in pressure between these ports is determined by the pilot cartridge's setting. Notably, this valve can handle maximum pressure at port 2, making it suitable for cross port relief circuits, although it is not recommended for load holding applications due to potential spool leakage. The main stage orifice is protected by a 150-micron stainless steel screen, and back pressure on tank port 2 will directly add to the valve setting at a 1:1 ratio. The RPKC8WV model incorporates Sun's floating style construction to prevent internal part binding from excessive installation torque or machining variations. It supports various pilot control options, including electroproportional, solenoid, air pilot, and hydraulic pilot operations\u2014these are sold separately and can be incorporated directly into the relief cartridge via the T8A cavity. For systems using phosphate ester fluids, cartridges with EPDM seals are available; however, exposure to petroleum-based fluids could damage these seals. With a capacity of up to 200 gpm (760 L/min) and a maximum operating pressure of 5000 psi (350 bar), this valve offers robust performance in demanding applications. The installation requires specific torque values for both the main stage and T8A pilot control valves. The RPKC8WV weighs approximately 2.50 lb (1.15 kg) and uses Viton seal kits identified as part number 990018006 for optimal sealing performance.
This valve is a normally closed modulating element that incorporates an integral pilot control cavity. It is a balanced piston design. The pilot control cavity will accept any T-8A pressure control cartridge. When the pressure at the inlet (port 1) reaches the pilot control cartridge's setting, the modulating element starts to open to tank (port 2), throttling flow to regulate the pressure. The pilot cartridge's setting determines the difference in pressure between port 1 and port 2.
- All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- 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.
- NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into the main stage valve to its required torque value.
- The -8 control option allows the pilot control valve to be incorporated directly into the end of the relief cartridge via the T-8A cavity. These pilot control cartridges are sold separately and include electro-proportional, solenoid, air pilot, and hydraulic pilot operation. See Pilot Control Cartridges.
- 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-18A |
| Series | 4 |
| Capacity | 200 gpm760 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Control Pilot Flow | 15 - 20 in³/min.0,25 - 0,33 L/min. |
| Pilot Control Cavity | T-8AT-8A |
| Main stage leakage at 110 SUS (24 cSt) | 5 in³/min.@1000 psi80 cc/min.@70 bar |
| Valve Hex Size | 1 5/8 in.41,3 mm |
| Valve Installation Torque | 350 - 375 lbf ft474 - 508 Nm |
| Model Weight | 2.50 lb1,15 kg |
| Seal kit - Cartridge | Viton: 990-018-006 |
Show FAQ
Additional Resources
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- 'Soft' Relief Eliminates Pressure Spikes
- Pilot-Operated, Balanced Poppet, Anti Shock Reliefs
- Configure Your Bluetooth Embedded Amplifier with AmpSet Blue™
- Sun Introduces 'Hybrid' Valves
- Tri-Grip Handknob Now Offered From Sun as a Standard Control Option
- Sun Expands Corrosion-Resistant Solutions
- CavitySaver multi-function valves deliver single-cartridge solutions
- Electro-Proportional Basics Explained
- CE/TÜV Certified Pressure Relief Valves
- Weatherized Solenoid Valves for Harsh Environments
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Pressure Relief and Regulating Cartridge Valve Technical Tips
- Pilot Operated, Balanced Poppet Relief Valves
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Pressure Relief and Regulating Valves
- Proportional Amplifiers and Ancillary Products
- Manufacturing Sun Cartridge Cavities
- Solenoid Coils for Switching and Proportional Valves
- Electro-Proportional Cartridge Valves
- Sun Model Code Explanation; 999-901-334
- Units of Measure, Settings, and Conversions
- Electro-Proportional Terms and Definitions
- Cartridges: Materials of Construction
- Cavity Information (S-171) and Tooling
- Sun's Floating Style Screw-In Cartridge
- Fluid and Temperature Recommendations
- Performance Data
Notes:
- Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at point of use.