How to properly disassemble and assemble J series metering pump head?
The J series metering pump may experience failures like no discharge or insufficient flow during operation, often requiring head disassembly for repair.
For no discharge issues, first check the installation height (recommended ≤5m) and then disassemble the pump head to inspect and clean the suction line, replacing damaged sealing gaskets with original PTFE ones if necessary.
When facing insufficient flow, disassemble the valve assembly to clean the ceramic ball and seat surfaces, checking for wear (standard clearance ≤0.05mm) and replacing components if severely worn.
Pressure instability can be solved by installing a 0.3-0.5MPa backpressure valve and ensuring free rotation of the valve ball during reassembly.
Proper reassembly requires cleaning all contact surfaces, replacing all O-rings (preferably FKM material), and tightening bolts in a cross pattern to specified torque values (e.g. 25N·m for M10 bolts).