DMX and DMH

ConstructionDMX and DMHGeneral descriptionThe Grundfos DMX and DMH pumps are mechanical diaphragmdosing pumps. The strokes are generated by aneccentric which moves the diaphragm by means of aspring-loaded plunger. The discharge stroke is activatedby the eccentric and the suction stroke by the spring return.The DMX and DMH pumps are designed for capacitiesbetween 4 and 2 x 1150 l/h and a maximum pressure upto 200 bar. The DMX pumps are fitted with a separationchamber. In the event of a diaphragm failure, the separationchamber prevents the pumped liquid from floodingthe pump unit or other system components.DMX model 221174932856TM03 2182 3805Fig. 9 Sectional drawing, DMX model 221Functional principle• Reciprocating displacement pump with electric motorand mechanical diaphragm control.• The rotation of the motor is transformed into the reciprocatingmovement of the dosing diaphragm by theoperation of the eccentric and tappet.• Adjustment of the dosing flow is possible by adjustingthe stroke length.LegendPos. Component1 Motor2 Gears3 Eccentric4 Dosing diaphragm5 Dosing head6 Suction valve7 Discharge valve8 Stroke-length adjusting knob9 Tappet15