SUN HYDRAULICS
RELIEF CART
RPISLWV
$221.89 USD
- SUN HYDRAULICS
- Material:RPISLWV
- Model:RPIS-LWV
- 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 RPISLWV (RPISLWV) is a pilot-operated, balanced-poppet relief cartridge designed to function as a normally closed pressure regulating valve. This cartridge valve opens to the tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to maintain desired pressure levels. It offers precise, smooth, and quiet operation with low pressure rise relative to flow. A key advantage of this design is its immunity to cavitation-related issues such as noise and manifold erosion, making it suitable for cross-port relief circuits where maximum pressure at port 2 is permissible. The RPISLWV is engineered for load-holding applications and demonstrates resilience against variations in oil temperature and contamination. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability in demanding environments. Its construction incorporates Sun's floating style design to mitigate internal component binding caused by installation torque or machining discrepancies. This valve accommodates back pressure at port 2 directly additive to the valve setting at a 1:1 ratio. It features adjustable settings via W or Y controls, with options for special settings defining maximum limits. Corrosion-resistant variants are available with external stainless steel or zinc-nickel plated components indicated by suffixes AP or LH in the model code. With a capacity of up to 100 gpm (380 L/min) and maximum operating pressure of 5000 psi (350 bar), this model exhibits a typical response time of 7 ms and minimal leakage upon reseat. It requires an installation torque of 150-160 lbf ft (203-217 Nm) and includes an adjustment screw with an internal hex size of 5/32 inches (4 mm). The RPISLWV weighs approximately 1.25 lb (0.60 kg) and can be maintained using Viton seal kit number 990316006.
The Sun Hydraulics RPISLWV (RPISLWV) is a pilot-operated, balanced-poppet relief cartridge designed to function as a normally closed pressure regulating valve. This cartridge valve opens to the tank port 2 when the inlet port 1 pressure reaches the set threshold, effectively throttling flow to maintain desired pressure levels. It offers precise, smooth, and quiet operation with low pressure rise relative to flow. A key advantage of this design is its immunity to cavitation-related issues such as noise and manifold erosion, making it suitable for cross-port relief circuits where maximum pressure at port 2 is permissible. The RPISLWV is engineered for load-holding applications and demonstrates resilience against variations in oil temperature and contamination. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability in demanding environments. Its construction incorporates Sun's floating style design to mitigate internal component binding caused by installation torque or machining discrepancies. This valve accommodates back pressure at port 2 directly additive to the valve setting at a 1:1 ratio. It features adjustable settings via W or Y controls, with options for special settings defining maximum limits. Corrosion-resistant variants are available with external stainless steel or zinc-nickel plated components indicated by suffixes AP or LH in the model code. With a capacity of up to 100 gpm (380 L/min) and maximum operating pressure of 5000 psi (350 bar), this model exhibits a typical response time of 7 ms and minimal leakage upon reseat. It requires an installation torque of 150-160 lbf ft (203-217 Nm) and includes an adjustment screw with an internal hex size of 5/32 inches (4 mm). The RPISLWV weighs approximately 1.25 lb (0.60 kg) and can be maintained using Viton seal kit number 990316006.
Pilot-operated, balanced-poppet 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, smooth, quiet, fast, and have low pressure rise vs. flow.
- Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- Valve is relatively insensitive to varying oil temperatures and oil borne contamination.
- Main stage orifice is protected by a 150 micron stainless steel screen.
- Suitable for use in load holding applications.
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
- 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 | 7 ms7 ms |
| Maximum Valve Leakage at Reseat | 10 drops/min.0,7 cc/min. |
| 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 | 1.25 lb0,60 kg |
| Seal kit - Cartridge | Viton: 990-316-006 |
Show FAQ
Additional Resources
- 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
- 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
- Manufacturing Sun Cartridge Cavities
- Pressure Relief and Regulating Valves
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
- Cavity Information (S-171) and Tooling
- Sun Model Code Explanation; 999-901-334
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data