NDWL Series Mechanical Diaphragm Metering Pump

High-flow mechanical diaphragm pump, about 275-530 L/h, cast-aluminum housing and precision drive; optional 4-20mA stroke, VFD and Ex motors.

Max flow

275 - 530 L/h

Max pressure

4.5 - 7 bar

Turndown / accuracy

—

Wetted materials

PVC / PVDF / PTFE / SS316

Protection

—

Power

—

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Best for: verifying flow/pressure and control interfaces against your dosing duty (Mechanical Diaphragm Pumps). Confirm chemical compatibility and install constraints before ordering — inquire for help.

Features

High-strength low-pressure cast aluminum housing
Precision worm-gear drive, energy efficient
Stroke length adjustable during operation
Heads PVC/PVDF/PTFE/SS316
Pure PTFE diaphragm for stable safe dosing
Optional 4-20mA stroke, VFD and Ex motors

Specifications

Flow rate	275 - 530 L/h
Pressure	4.5 - 7 bar
Motor power	370 W
Pump speed	118 / 177 SPM
Liquid-end material	PVC / PVDF / PTFE / SS316

Applications

Large WWTP dosing

High-flow industrial feed

Central cooling-water dosing rooms

Continuous chemical feeding

Materials & media

Liquid end	PVC / PVDF / PTFE / SS316
Diaphragm	PTFE

Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.

Controls & communication

Manual stroke	Standard
4-20mA / VFD	—
Explosion-proof motor	—

Models & specs

Model	Flow	Pressure	SPM	Power	Notes
NDWL-275/0.7	275 L/h	7 bar	118	370 W	diaphragm 120mm
NDWL-355/0.7	355 L/h	7 bar	118	370 W
NDWL-410/0.6	410 L/h	6 bar	177	370 W
NDWL-530/0.45	530 L/h	4.5 bar	177	370 W