型号描述

7800 型数字计量泵的特征在于，针对计量泵采用了一种全新的驱动原理。通过一个受微处理器控制的步进电机进行驱动，所述步进电机通过一个曲柄连杆机构与隔膜直接相连。与传统计量泵不同，在这种设计中，可在整个吸气冲程/压缩冲程周期中，通过微处理器电子设备控制隔膜的位置和速度。受微处理器控制的压缩冲程，能够确保一个更为均匀的计量过程，尤其在输送量较小的情况下。计量泵 7800 始终使用的冲程长度工作，这样可以在整个调整范围内获得一个高计量精度以及一个针对喷出介质的低敏感度。通过经优化的、死角与完整冲程长度之间的关系，确保了精度和功能，即使在液体难以喷出的情况下。因此具有抗气蚀功能，所以，该驱动装置非常适合高粘度液体的计量。可通过标准信号 (4…20 mA)、外部脉冲（例如开路集电极）和手动方式控制计量泵 7800。通过较大的调整范围 1:1000，只需利用 5 个泵尺寸即可完成从 0.002 l/h 到 48.0 l/h 的计量任务。

1）通过数控步进电机驱动装置进行连续计量
2）控制：0/4…20 mA，脉冲，时间和手动
3）通过软件限制计量功率
4）计量功率的调节范围 1:1000
5）在整个调整范围内具有高精度

Type Description

The Type 7800 digital dosing pump is characterised by a drive principle that is completely new for dosing pumps. The drive is carried out by a microprocessor-controlled stepper motor, which is connected directly to the diaphragm by a crankshaft-and-connecting-rod drive. This means that, in contrast to conventional dosing pumps, the position and the speed of the diaphragm is controlled by the microprocessor electronics during the complete discharge/suction cycle. The microprocessor-controlled compression stroke results in a dosage that is considerably more even, particularly with small dosages. The 7800 dosing pump always works with the maximum stroke length, whereby a high accuracy for the dosing over the full setting range and a lower sensitivity with respect to gaseous media is achieved. Through an optimised clearance volume ratio with the full stroke length, the accuracy and function is ensured, even for diffi cult degassing liquids. Through the anticavitation function, the drive is optimally adapted to the dosing of high viscosity liquids. The 7800 dosing pump can be controlled manually, by standard signals (4…20 mA) and by external pulses (e.g., open-collector). Thanks to the wide setting range of 1:1000, it is possible to realise dosing tasks from 0.002 l/h to 48.0 l/h with only 5 pump sizes.

1）Continuous dosing through digitally controlled stepper motor drive
2）Controlled by: 0/4…20 mA, pulses, time and manually
3）Limitation of the max. dosage through software
4）Setting range for the dosage 1:1000
5）High accuracy over the complete setting range

数字计量泵7800型部分订货号如下：

560097 7800-1500-FF-PD-DA25-BER/56-BH-040 * MM05                                
560179 7800-1500-AA-VA-DA25-BER/56-BH-040 * MM05                                
787991 7800-0120-FF-PP-DA21-230/56-BX-006                                      
788109 7800-0480-FF-PP-DA37-230/56-BX-2,6                                      
788114 7800-0185-FF-PP-DA37-230/56-BX-6,2                                      
788306 7800-0075-FF-PD-DA21-230/56-BX-010                                      
788337 7800-0480-FF-PD-DA37-230/56-BX-2,6                                      
788339 7800-0120-FF-PD-DA21-230/56-BX-006                                      
788349 SET8-7800-0120PPFF-00-00-0-000/00-0                                      
788350 SET8-7800-0185PPFF-00-00-0-000/00-0                                      
788351 SET8-7800-0480PPFF-00-00-0-000/00-0                                      
788371 7800-0185-FF-PD-DA37-230/56-BX-6,2                                      
788372 7800-0025-FF-PP-DA21-230/56-BX-018                                      
788373 7800-0025-FF-PD-DA21-230/56-BX-018                                      
788468 7800-0025-AA-PP-DA21-230/56-BX-018                                      
788469 7800-0075-AA-PP-DA21-230/56-BX-010                                      
788470 7800-0120-AA-PP-DA21-230/56-BX-006                                      
788471 7800-0185-AA-PP-DA37-230/56-BX-6,2                                      
788472 7800-0480-AA-PP-DA37-230/56-BX-2,6                                      
788501 7800-0075-FF-PP-DA21-230/56-BX-010