SUN HYDRAULICS
QPAACAN
$191.01 USD
- SUN HYDRAULICS
- Material:QPAACAN
- Model:QPAA-CAN
- 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 QPAACAN (QPAACAN) is an accumulator sense, pump unload pilot valve designed to optimize hydraulic systems by efficiently managing pressure. It senses the pressure at port 1, and when this reaches a predetermined setting, it connects port 2 to port 3 to vent a relief valve and unload the pump. This mechanism ensures that when the pressure falls below 85% of the set value, port 2 blocks from port 3, allowing the pump to recharge the accumulator. The valve features a fixed differential ratio of 15:1 between unload and reset settings, with minimal variation due to dynamic seal friction. Its spool design maintains consistent performance by preventing wear over time. For optimal function, a separate check valve is necessary between port 1 and the pump, and a dedicated drain line is required to avoid erratic operations from tank line pressure fluctuations. The QPAACAN is housed in a T-11A cavity with a capacity of 46 in\u00b3/min (0.75 L/min) and can withstand up to 5000 psi (350 bar). It requires precise system design considerations due to its sensitivity to system pressure drops and flow rates. The valve's construction minimizes internal binding risks during installation or machining variations. Installation specifics include a torque requirement of 30 - 35 lbf ft (41 - 47 Nm) for the valve hex size of 7/8 in (22.2 mm), with adjustment via an internal hex screw size of 5/32 in (4 mm). The locknut requires torque between 80 - 90 lbf in (9 -10 Nm). With its compact weight of .35 lb (.15 kg), this valve is ideal for applications requiring precise hydraulic control and reliability under high-pressure conditions.
The Sun Hydraulics QPAACAN (QPAACAN) is an accumulator sense, pump unload pilot valve designed to optimize hydraulic systems by efficiently managing pressure. It senses the pressure at port 1, and when this reaches a predetermined setting, it connects port 2 to port 3 to vent a relief valve and unload the pump. This mechanism ensures that when the pressure falls below 85% of the set value, port 2 blocks from port 3, allowing the pump to recharge the accumulator. The valve features a fixed differential ratio of 15:1 between unload and reset settings, with minimal variation due to dynamic seal friction. Its spool design maintains consistent performance by preventing wear over time. For optimal function, a separate check valve is necessary between port 1 and the pump, and a dedicated drain line is required to avoid erratic operations from tank line pressure fluctuations. The QPAACAN is housed in a T-11A cavity with a capacity of 46 in\u00b3/min (0.75 L/min) and can withstand up to 5000 psi (350 bar). It requires precise system design considerations due to its sensitivity to system pressure drops and flow rates. The valve's construction minimizes internal binding risks during installation or machining variations. Installation specifics include a torque requirement of 30 - 35 lbf ft (41 - 47 Nm) for the valve hex size of 7/8 in (22.2 mm), with adjustment via an internal hex screw size of 5/32 in (4 mm). The locknut requires torque between 80 - 90 lbf in (9 -10 Nm). With its compact weight of .35 lb (.15 kg), this valve is ideal for applications requiring precise hydraulic control and reliability under high-pressure conditions.
The accumulator sense, pump unload pilot valve is used to sense pressure in an accumulator at port 1 of the valve and when the pressure at port 1 reaches the valve setting, port 2 connects to port 3 to vent a relief valve and unload the pump. This valve has a 15% ratio between unload setting and reset; when pressure at port 1 falls below 85% of the valve setting, port 2 is blocked from port 3 and the pump will come back online to recharge the accumulator. This valve requires a separate check valve between port 1 and the pump. Another version of the accumulator sense, pump unload valve, QCDA, includes a free-flow check valve for pump flows under 12 gpm (50 L/min).
- The pressure differential between unload and reset will be within +/- 1% of the stated ratio of the valve with up to an additional 25 psi (1,7 bar) due to dynamic seal friction.
- The accumulator sensing area is positively sealed.
- The spool design of this valve allows it to maintain a fixed differential ratio because the areas are created by diameters on the spool that will not wear or change with use.
- Minimum clearances between the spool and sleeve and a seal on the pilot piston diameter significantly reduce the potential for silting.
- When applying this cartridge, a separate drain line is required to prevent erratic operation caused by tank line pressure fluctuations.
- NOTE: Careful consideration should be given when selecting an adjustment range. System pressure drops and flows tend to affect the operation of unloading valves. Low operating pressures combined with low differentials result in a very narrow band between unload and reset, requiring precise system design. High flow rates typically mean high pressure drops, which subtract from the differential the valve has to work with.
- Sun has designed a variety of standard accumulator/pump unload assemblies with a variety of features. These assemblies can be found on our website under SOLUTIONS: ACCUMLATOR SENSE, PUMP UNLOAD.
- 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-11A |
| Series | 1 |
| Capacity | 46 in³/min.0,75 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Pilot Flow Capacity | 46 in³/min.0,75 L/min. |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 7/8 in.22,2 mm |
| Valve Installation Torque | 30 - 35 lbf ft41 - 47 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 | .35 lb0,15 kg |
| Seal kit - Cartridge | Viton: 990-011-006 |
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