液压螺杆泵6901

钢

设计:钢外壳，硬化和抛光。螺纹主轴硬化和抛光。螺杆泵。6901-20提供2个带槽螺母。通过螺纹端口供油。用途:螺杆泵特别适用于操作小型夹紧夹具。注:对于封闭回路，必须考虑以下因素:与螺杆泵连接的液压夹紧元件必须密封紧密。由于冲程运动时夹紧油缸可能泄漏和油的压缩性(在140 bar时为1%)，螺杆泵的冲程体积只有70%。油中的空气含量大大增加了压缩系数。因此，液压系统必须小心地净化空气。 An air bleed screw at the highest position is a necessity. After returing the spindle of the pump, oil must be refilled at this spot. No air pocket should arise in the hydraulic system, which cannot be purged. A precise pressure control is possible by a manometer only. An electric pressure switch enables a pressure monitoring too. A pressure limiting valve is not suitable. Operating the threaded spindle by a torque wrench is possible. However the pressure should also be checked by a gauge. For the built-in version the mounting torque has to be observed.