
Mechanical Diaphragm Pumps
WELL-OFF WH/WL Mechanical Diaphragm Metering Pump
WELL-OFF WH/WL mechanical diaphragm pumps. 15–150 L/h, 3–7 bar, PP+PTFE, 220/380V.
Max flow
15–150 L/h
Max pressure
3–7 bar
Turndown / accuracy
—
Wetted materials
PP / PTFE
Protection
—
Power
220/380V 50/60Hz
Features
- Manual knob proportional stroke control
- 15–150 L/h, 3–7 bar
- 220/380V 50/60Hz
- PP liquid end, PTFE diaphragm
- WH 25W; WL 60/90W
Specifications
| Flow | 15–150 L/h |
| Pressure | 3–7 bar |
| Power | 220/380V 50/60Hz |
| Materials | PP / PTFE |
| Control | manual adjustment |
| Brand | WELL-OFF |
| Brand | — |
Applications
Materials & media
| Materials | PP / PTFE |
Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.
Controls & communication
| Control | manual adjustment |
Models & specs
| Model | Flow | Pressure | Power | Weight | |
| WH-15-07 | 15 L/h | 7 bar | 25 W | 5 kg | |
| WH-30-05 | 30 L/h | 5 bar | 25 W | 5 kg | |
| WH-50-03 | 50 L/h | 3 bar | 25 W | 5 kg | |
| WH-60-03 | 60 L/h | 3 bar | 25 W | 5 kg | |
| WL-60-05 | 60 L/h | 5 bar | 60 W | 8.5 kg | |
| WL-80-05 | 80 L/h | 5 bar | 60 W | 8.5 kg | |
| WL-100-05 | 100 L/h | 5 bar | 60 W | 8.5 kg | |
| WL-120-03 | 120 L/h | 3 bar | 60 W | 8.5 kg | |
| WL-150-03 | 150 L/h | 3 bar | 90 W | 8.5 kg |
Dimensions & installation
Dimensional drawings available on request (CAD / PDF).
Downloads
Related / accessories

Mechanical Diaphragm Pumps
Edose (Yi Dao Ci) Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
NDJ Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
NDWS Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
KD Series Mechanical Diaphragm Metering Pump (Cheon-Sei / KEMPION)

Mechanical Diaphragm Pumps
SEKO Kosmo MM1 Mechanical Diaphragm Pump

Mechanical Diaphragm Pumps
KDV-A 4~20mA Automatic Control Metering Pump (Cheon-Sei / KEMPION)
Related solutions
Related case studies

Wastewater
Municipal WWTP PAC Dosing Upgrade
Mechanical diaphragm pumps with online turbidity monitoring cut chemical consumption by 15%.

Chemical
Chemical Park Acid/Alkali Neutralization
Corrosion-resistant mechanical diaphragm pumps dosing concentrated acid/alkali with closed-loop pH control — 99% compliance.
Need help selecting?
Share duty (flow, pressure, media, controls) — we reply within 1 business day.