SUN HYDRAULICS
RPGCLDN
$90.70 USD
Tags:
- SUN HYDRAULICS
- Material:RPGCLDN
- Model:RPGC-LDN
- 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 RPGCLDN (RPGCLDN) is a pilot-operated, balanced-piston relief cartridge designed for pressure regulation in hydraulic systems. This valve remains normally closed, opening to the tank port when the inlet pressure reaches the set point, thus throttling flow to maintain desired pressure levels. It is known for its accuracy, smooth operation, low noise levels, and moderate response speed. The valve's design ensures it can handle maximum pressure at port 2, making it suitable for cross-port relief circuits; however, users should account for spool leakage in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen, although it's not recommended for load-holding functions due to potential leakage. Back pressure on the tank port directly influences the valve setting at a 1:1 ratio. Cartridges with EPDM seals are compatible with phosphate ester fluids but are vulnerable to petroleum-based substances. The RPGCLDN model allows adjustment across its full range using W or Y controls unless a special setting is specified as the maximum limit. Corrosion-resistant versions are available with stainless steel or zinc-nickel plated components. The Sun floating style construction minimizes risks of internal binding from installation torque or machining variations. Key specifications include a cavity size of T-3A and a flow capacity of up to 50 gpm (200 L/min). It operates at a maximum pressure of 5000 psi (350 bar) with typical response times around 10 ms and minimal leakage under specified conditions. Installation requires specific torque settings and hex sizes for adjustments and locknuts. This product weighs approximately 0.50 lb (0.25 kg) and uses Viton seal kits identified by part number 990203006 for maintenance purposes.
The Sun Hydraulics RPGCLDN (RPGCLDN) is a pilot-operated, balanced-piston relief cartridge designed for pressure regulation in hydraulic systems. This valve remains normally closed, opening to the tank port when the inlet pressure reaches the set point, thus throttling flow to maintain desired pressure levels. It is known for its accuracy, smooth operation, low noise levels, and moderate response speed. The valve's design ensures it can handle maximum pressure at port 2, making it suitable for cross-port relief circuits; however, users should account for spool leakage in such applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen, although it's not recommended for load-holding functions due to potential leakage. Back pressure on the tank port directly influences the valve setting at a 1:1 ratio. Cartridges with EPDM seals are compatible with phosphate ester fluids but are vulnerable to petroleum-based substances. The RPGCLDN model allows adjustment across its full range using W or Y controls unless a special setting is specified as the maximum limit. Corrosion-resistant versions are available with stainless steel or zinc-nickel plated components. The Sun floating style construction minimizes risks of internal binding from installation torque or machining variations. Key specifications include a cavity size of T-3A and a flow capacity of up to 50 gpm (200 L/min). It operates at a maximum pressure of 5000 psi (350 bar) with typical response times around 10 ms and minimal leakage under specified conditions. Installation requires specific torque settings and hex sizes for adjustments and locknuts. This product weighs approximately 0.50 lb (0.25 kg) and uses Viton seal kits identified by part number 990203006 for maintenance purposes.
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
- 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
- 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
- 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.