SUN HYDRAULICS
RPKTCWN
$714.72 USD
- SUN HYDRAULICS
- Material:RPKTCWN
- Model:RPKT-CWN
- 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 RPKTCWN (RPKTCWN) is a sophisticated pilot-operated, anti-shock relief cartridge designed to manage maximum system pressure while controlling the rate of pressure increase. This valve opens and closes at a constant speed, independent of settings and flows, with an adjustable screw to determine both the maximum relief and minimum threshold settings. It is suitable for cross port relief circuits, accommodating maximum pressure at port 2. The valve must be adjusted without system pressure due to the exposure of seals on the adjust screw. The adjustment process involves checking the setting, removing pressure, adjusting the valve, and rechecking the setting. This model is not recommended for load-holding applications. When inlet port 1's pressure exceeds the threshold, it opens to tank port 2 while gradually increasing the setting by compressing a pilot spring until a mechanical stop limits it. It offers protection for pumps and motors from pressure transients caused by sudden load changes\u2014particularly beneficial for variable displacement pumps that may react slowly to such changes\u2014and reduces jerks in hydrostatic drives during sudden reversals. Additionally, in conjunction with a switching device, it can mimic ramp characteristics typical of proportional valves. The RPKTCWN's design incorporates Sun's floating style construction to prevent internal part binding due to installation torque or machining variations. It supports small power units starting against an anti-shock relief for extended pump life. The valve boasts a capacity of 200 gpm (760 L/min), with a maximum operating pressure of 5000 psi (350 bar). Its response time is typically 2 ms with a pressure ramp-up time between 400-600 ms. Adjustments require approximately 4.5 clockwise turns to increase settings, with specific torque requirements detailed for installation and adjustment components.
The Sun Hydraulics RPKTCWN (RPKTCWN) is a sophisticated pilot-operated, anti-shock relief cartridge designed to manage maximum system pressure while controlling the rate of pressure increase. This valve opens and closes at a constant speed, independent of settings and flows, with an adjustable screw to determine both the maximum relief and minimum threshold settings. It is suitable for cross port relief circuits, accommodating maximum pressure at port 2. The valve must be adjusted without system pressure due to the exposure of seals on the adjust screw. The adjustment process involves checking the setting, removing pressure, adjusting the valve, and rechecking the setting. This model is not recommended for load-holding applications. When inlet port 1's pressure exceeds the threshold, it opens to tank port 2 while gradually increasing the setting by compressing a pilot spring until a mechanical stop limits it. It offers protection for pumps and motors from pressure transients caused by sudden load changes\u2014particularly beneficial for variable displacement pumps that may react slowly to such changes\u2014and reduces jerks in hydrostatic drives during sudden reversals. Additionally, in conjunction with a switching device, it can mimic ramp characteristics typical of proportional valves. The RPKTCWN's design incorporates Sun's floating style construction to prevent internal part binding due to installation torque or machining variations. It supports small power units starting against an anti-shock relief for extended pump life. The valve boasts a capacity of 200 gpm (760 L/min), with a maximum operating pressure of 5000 psi (350 bar). Its response time is typically 2 ms with a pressure ramp-up time between 400-600 ms. Adjustments require approximately 4.5 clockwise turns to increase settings, with specific torque requirements detailed for installation and adjustment components.
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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