SUN HYDRAULICS
RPKTLWV
$713.23 USD
- SUN HYDRAULICS
- Material:RPKTLWV
- Model:RPKT-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 RPKTLWV (RPKTLWV) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve is engineered to open and then ramp closed at a consistent speed, regardless of settings and flow conditions. The adjust screw allows users to set both the maximum relief setting and the minimum threshold setting, with seals exposed to system pressure necessitating adjustment only when pressure is removed. Specifically suited for cross-port relief circuits, this valve accepts maximum pressure at port 2 but is not recommended for load-holding applications. When inlet port 1 pressure exceeds the threshold setting, the valve opens to tank port 2, with the pilot section moving forward steadily to increase the setting by compressing the pilot spring until a mechanical stop is reached. Providing essential protection for pumps and motors from sudden load changes and pressure transients\u2014particularly in variable displacement pumps\u2014this valve aids in reducing jerk in hydrostatic drives during sudden reversals. It can be used alongside switching devices to offer ramp characteristics typically associated with proportional valves. Additionally, small power units can start against an anti-shock relief for extended pump life. The backpressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPKTLWV features Sun's floating style construction, minimizing internal part binding due to excessive installation torque or cavity/cartridge machining variations. It fits T-18A cavities, has a series 4 capacity of up to 200 gpm (760 L/min), and operates under a maximum pressure of 5000 psi (350 bar). The response time is typically around 2 ms with a pressure ramp-up time between 400-600 ms. Adjustments require approximately 4.5 clockwise turns for increased settings, ensuring precise control over system pressures.
The Sun Hydraulics RPKTLWV (RPKTLWV) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve is engineered to open and then ramp closed at a consistent speed, regardless of settings and flow conditions. The adjust screw allows users to set both the maximum relief setting and the minimum threshold setting, with seals exposed to system pressure necessitating adjustment only when pressure is removed. Specifically suited for cross-port relief circuits, this valve accepts maximum pressure at port 2 but is not recommended for load-holding applications. When inlet port 1 pressure exceeds the threshold setting, the valve opens to tank port 2, with the pilot section moving forward steadily to increase the setting by compressing the pilot spring until a mechanical stop is reached. Providing essential protection for pumps and motors from sudden load changes and pressure transients\u2014particularly in variable displacement pumps\u2014this valve aids in reducing jerk in hydrostatic drives during sudden reversals. It can be used alongside switching devices to offer ramp characteristics typically associated with proportional valves. Additionally, small power units can start against an anti-shock relief for extended pump life. The backpressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPKTLWV features Sun's floating style construction, minimizing internal part binding due to excessive installation torque or cavity/cartridge machining variations. It fits T-18A cavities, has a series 4 capacity of up to 200 gpm (760 L/min), and operates under a maximum pressure of 5000 psi (350 bar). The response time is typically around 2 ms with a pressure ramp-up time between 400-600 ms. Adjustments require approximately 4.5 clockwise turns for increased settings, ensuring precise control over system pressures.
Pilot-operated, anti shock relief cartridges limit maximum system pressure and also limit the rate of pressure rise. The valve opens and then ramps closed at a constant speed, independent of settings and flows. The adjust screw determines the maximum (relief) setting and the minimum (threshold) setting.
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is; check the setting, remove the pressure, adjust the valve, check the new setting.
- Not suitable for use in load holding applications.
- When pressure at the inlet (port 1) exceeds the threshold setting, the valve opens to tank (port 2). The pilot section moves forward at a steady rate, increasing the setting by compressing the pilot spring. Maximum setting is achieved when the pilot section reaches a mechanical stop.
- Valve provides protection for pumps and motors from pressure transients due to sudden load changes, especially variable displacement pumps, since the displacement mechanism is sometimes too slow to catch these pressure transients.
- Valve provides protection for hydrostatic drives by reducing the jerk caused by sudden reversals. The valve is suitable for cross-port applications.
- When used with a switching device, the valve can provide the ramp characteristic typically provided by proportional valves.
- Small power units can be started against an anti shock relief to provide longer pump life.
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
- All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
- 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. |
| Factory Pressure Settings Established at | 4 gpm15 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Control Pilot Flow | 10 - 25 in³/min.0,16 - 0,41 L/min. |
| Response Time - Typical | 2 ms2 ms |
| U.S. Patent # | 6,039,0706,039,070 |
| Pressure Ramp Up Time | 400 - 600 ms400 - 600 ms |
| Adjustment - Number of Clockwise Turns to Increase Setting | 4.54.5 |
| 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 | 2.50 lb1,15 kg |
| Seal kit - Cartridge | Viton: 990-318-006 |
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