LANGO Chemical Metering Dosing Pump for watertreatment

LANGO Chemical Metering Dosing Pump for watertreatment

1. Safety and Caution Notes

Avoid areas where ambient temperature exceeds 40 degrees Celsius or falls below 0 degrees Celsius, or where the pump or tubing would be exposed to direct sunlight.

Disconnect the pump from electrical power source before performing any maintenance.

When working on or around a dosing pump, always wear proper protective clothing and equipment as recommended by the supplier of the liquid being pumped.

Depressurize the discharge tubing before disconnecting the tubing or performing any maintenance on the pump.

2. Principle of Operation

The EZ series electromagnetic dosing pump consists of a pump unit, a driving unit, and a control unit. The drive unit is an electromagnetic solenoid. When the solenoid coil is energized by the control unit the armature shaft moves forward due to the magnetic force of the solenoid. The shaft is attached to a PTFE

faced diaphragm which is part of the pump unit. The diaphragm is forced into the pump head cavity decreasing volume and increasing pressure which forces liquid in the pump head out through the discharge check valves. When the solenoid coil is de-energized, a spring returns the armature to its starting position. This action pulls the diaphragm out of the head cavity increasing volume and decreasing pressure. Atmospheric pressure then pushes liquid from the supply tank through the suction check valves to refill the pump head.

3. Specifications

Capacity/Pressure Rating

1. The performance of the pump is obtained by clean water under a rated voltage and ambient temperature.

2. The above parameters are measured with clean water. The discharge amount increases when discharge pressure decreases.

3. Allowable ambient temperature: 0～40°C

4. Allowable liquid temperature: 0～40°C

5. Allowable voltage deviation: ±10% of the rated voltage

1) The allowable voltage range of special circumstances, such as the transmission of slurry, please consult us.

2) Due to product improvement, the product specifications may change without prior notice.

PTFE: Polyterafluoroethylene

EPDM: Ethylene propylene diene monomer(Alkali-resistant rubber) FKM: Fluoroelastmer(Acid-resistant rubber)