SUN HYDRAULICS
RPKTLWN
$706.78 USD
- SUN HYDRAULICS
- Material:RPKTLWN
- Model:RPKT-LWN
- 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 RPKTLWN (RPKTLWN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve opens and ramps closed at a constant speed, which is independent of settings and flow rates. The adjustable screw on the valve determines both the maximum relief setting and the minimum threshold setting, making it essential for applications requiring precise pressure control. It is particularly suitable for cross-port relief circuits and can accept maximum pressure at port 2. However, it is not recommended for load-holding applications. When the inlet port 1 exceeds its threshold setting, the valve opens to tank port 2, offering protection against pressure transients that could damage pumps and motors. This feature is especially beneficial in systems with variable displacement pumps or hydrostatic drives, where sudden load changes can occur. The valve's design ensures smooth operation by reducing jerks during sudden reversals, making it ideal for crossport applications. This cartridge incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. It supports small power units by allowing them to start against an anti-shock relief, thereby extending pump life. Additionally, back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPKTLWN model fits into a T-18A cavity and has a capacity of 200 gpm (760 L/min). It operates at a maximum pressure of 5000 psi (350 bar) with control pilot flow ranging from 10-25 in\u00b3/min (0.16-0.41 L/min). Its response time is typically around 2 ms with a pressure ramp-up time between 400-600 ms. The adjustment requires approximately 4.5 clockwise turns to increase the setting. The model weighs approximately 2.50 lb (1.15 kg) and uses Viton seal kits for reliability under various conditions.
The Sun Hydraulics RPKTLWN (RPKTLWN) is a pilot-operated, anti-shock relief cartridge designed to limit maximum system pressure and control the rate of pressure rise. This valve opens and ramps closed at a constant speed, which is independent of settings and flow rates. The adjustable screw on the valve determines both the maximum relief setting and the minimum threshold setting, making it essential for applications requiring precise pressure control. It is particularly suitable for cross-port relief circuits and can accept maximum pressure at port 2. However, it is not recommended for load-holding applications. When the inlet port 1 exceeds its threshold setting, the valve opens to tank port 2, offering protection against pressure transients that could damage pumps and motors. This feature is especially beneficial in systems with variable displacement pumps or hydrostatic drives, where sudden load changes can occur. The valve's design ensures smooth operation by reducing jerks during sudden reversals, making it ideal for crossport applications. This cartridge incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. It supports small power units by allowing them to start against an anti-shock relief, thereby extending pump life. Additionally, back pressure on tank port 2 directly adds to the valve setting at a 1:1 ratio. The RPKTLWN model fits into a T-18A cavity and has a capacity of 200 gpm (760 L/min). It operates at a maximum pressure of 5000 psi (350 bar) with control pilot flow ranging from 10-25 in\u00b3/min (0.16-0.41 L/min). Its response time is typically around 2 ms with a pressure ramp-up time between 400-600 ms. The adjustment requires approximately 4.5 clockwise turns to increase the setting. The model weighs approximately 2.50 lb (1.15 kg) and uses Viton seal kits for reliability under various conditions.
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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