Sun Hydraulics QPACLAV 液压阀-产品快照
- 品牌:
- Sun Hydraulics
- 型号:
- QPACLAV
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| 供应商名称 | 电话 | 备注 |
|---|---|---|
| 上海萨弗工控设备有限公司 | 021-51095192 | |
| 上海伦萨液压设备有限公司 | 021-69008526 | |
| 升旭液压系统有限公司 | 021-51162862 | |
| 橡达油压机械（上海）有限公司 |
产品介绍
Sun Hydraulics QPACLAV 液压阀
QPACLAV - 30%, accumulator sense, pump unload valve - pilot capacity
Sun Hydraulics
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 30% ratio between unload setting and reset; when pressure at port 1 falls below 70% 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, QCDC, 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 Show FAQ How big is a drop of hydraulic oil? There are exactly 250 Sun drops in a cubic inch or 15 in a cc. I need to charge an accumulator. What do I need to know? See our Highlight on Accumulator Sense, Pump Unload Valves for detailed information. Additional Resources Sun Cartridges with EPDM Seals Sun Expands Corrosion-Resistant Solutions CavitySaver multi-function valves deliver single-cartridge solutions Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool Accumulator Sense, Pump Unload Valves Sun Offers Zinc-Nickel Plating for Corrosion Resistance Manufacturing Sun Cartridge Cavities Circuit Savers Fluid and Temperature Recommendations Sun's Floating Style Screw-In Cartridge Performance Data Sun Model Code Explanation; 999-901-334 Units of Measure, Settings, and Conversions Cartridges: Materials of Construction Cavity Information (S-171) and Tooling Related Files Download Download Download Download Download Download Download
Home / Sun Hydraulics - QPACLAV - 30%, accumulator sense, pump unload valve - pilot capacity
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