SUN HYDRAULICS
RPGCLUN
$91.04 USD
- SUN HYDRAULICS
- Material:RPGCLUN
- Model:RPGC-LUN
- 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 RPGCLUN (RPGCLUN) is a pilot-operated, balanced-piston relief cartridge designed for pressure regulation. This normally closed valve opens to the tank port when the inlet pressure reaches the set value, throttling flow to maintain consistent pressure levels. Known for its accuracy and smooth operation, it features a low-pressure rise versus flow and moderate response speed. The cartridge is interchangeable across similar frame sizes and can handle maximum pressure at port 2, making it suitable for cross-port relief circuits with considerations for spool leakage. It includes a 150-micron stainless steel screen protecting the main stage orifice. While not suitable for load-holding applications due to spool leakage, backpressure on the tank port directly adds to the valve setting at a 1:1 ratio. Cartridges with EPDM seals are intended for systems using phosphate ester fluids and should not be exposed to petroleum-based fluids. The valve offers adjustability via W or Y controls, with options for special settings that define maximum values. The corrosion-resistant design is available with external stainless steel components (suffix AP) or zinc-nickel plating (suffix LH). The floating style construction minimizes internal binding risks due to installation torque variations. This Series 2 cartridge fits a T-3A cavity and has a capacity of 50 gpm (200 L/min), withstands up to 5000 psi (350 bar), and typically responds in 10 ms with minimal leakage at specified conditions. Installation requires specific torque settings: valve hex size is 1-1/8 inch (28.6 mm), requiring 45-50 lbf ft; adjustment screw internal hex size is 5/32 inch; locknut hex size is 9/16 inch, requiring torque of 80-90 lbf in. The model weighs .50 lb (.25 kg) and uses Viton seal kits coded as 990203006.
The Sun Hydraulics RPGCLUN (RPGCLUN) is a pilot-operated, balanced-piston relief cartridge designed for pressure regulation. This normally closed valve opens to the tank port when the inlet pressure reaches the set value, throttling flow to maintain consistent pressure levels. Known for its accuracy and smooth operation, it features a low-pressure rise versus flow and moderate response speed. The cartridge is interchangeable across similar frame sizes and can handle maximum pressure at port 2, making it suitable for cross-port relief circuits with considerations for spool leakage. It includes a 150-micron stainless steel screen protecting the main stage orifice. While not suitable for load-holding applications due to spool leakage, backpressure on the tank port directly adds to the valve setting at a 1:1 ratio. Cartridges with EPDM seals are intended for systems using phosphate ester fluids and should not be exposed to petroleum-based fluids. The valve offers adjustability via W or Y controls, with options for special settings that define maximum values. The corrosion-resistant design is available with external stainless steel components (suffix AP) or zinc-nickel plating (suffix LH). The floating style construction minimizes internal binding risks due to installation torque variations. This Series 2 cartridge fits a T-3A cavity and has a capacity of 50 gpm (200 L/min), withstands up to 5000 psi (350 bar), and typically responds in 10 ms with minimal leakage at specified conditions. Installation requires specific torque settings: valve hex size is 1-1/8 inch (28.6 mm), requiring 45-50 lbf ft; adjustment screw internal hex size is 5/32 inch; locknut hex size is 9/16 inch, requiring torque of 80-90 lbf in. The model weighs .50 lb (.25 kg) and uses Viton seal kits coded as 990203006.
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.
- 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. 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.
- 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-3A |
| Series | 2 |
| Capacity | 50 gpm200 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) | 3 in³/min.@1000 psi50 cc/min.@70 bar |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 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 | .50 lb0,25 kg |
| Seal kit - Cartridge | Viton: 990-203-006 |
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Additional Resources
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Pilot-Operated, Balanced Poppet, Anti Shock Reliefs
- CavitySaver multi-function valves deliver single-cartridge solutions
- 'Soft' Relief Eliminates Pressure Spikes
- Tri-Grip Handknob Now Offered From Sun as a Standard Control Option
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Sun Introduces 'Hybrid' Valves
- CE/TÜV Certified Pressure Relief Valves
- Pressure Relief and Regulating Cartridge Valve Technical Tips
- Pilot Operated, Balanced Poppet Relief Valves
- Sun Expands Corrosion-Resistant Solutions
- Manufacturing Sun Cartridge Cavities
- Pressure Relief and Regulating Valves
- Sun Model Code Explanation; 999-901-334
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
- Cavity Information (S-171) and Tooling
Notes:
- For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.