Iwaki LK-F57 Dosing Pump
Spare Parts for LK-F57 Dosing Pump
Product Summary
The Iwaki LK-F57 is a high-capacity, mechanically actuated diaphragm metering pump designed for precise chemical dosing in water treatment and industrial processes. Driven by a compact, robust worm-gear reducer and a dual-cam drive mechanism, it ensures long-term reliability and accurate flow control. The pump features a PTFE-faced diaphragm and is available with PVC, PVDF, or Stainless Steel liquid ends to handle aggressive chemicals.
- Dual-Cam Drive System: Compact and rigid worm gear drive ensures maximum wear resistance and continuous operation durability.
- High Dosing Accuracy: Maintains a discharge accuracy (repeatability) within ±2% FS with excellent linearity.
- Mechanical Diaphragm: Nylon-reinforced PTFE diaphragm provides superior chemical resistance and long service life.
- Outdoor Rated Motor: Standard models employ totally enclosed fan-cooled (TEFC) motors suitable for outdoor installation.
- Flexible Connections: Available with Flange, Union, or Hose connections to suit various piping systems.
Spare Parts List
| Select | Qty | Part Number | Description | Material / Spec |
|---|---|---|---|---|
| 1 | L0167 | Diaphragm | PTFE / EPDM | |
| 2 | L0151 | Valve Ball (VC Type) | Alumina Ceramic | |
| 2 | L0150 | Valve Ball (VH Type) | Hastelloy C276 | |
| 2 | L0153 | Valve Seat | PVC | |
| 2 | L0152 | Valve Guide | PVC | |
| 2 | L0155 | Valve Gasket | PTFE | |
| 1 | L1513 | Pump Head | PVC | |
| 1 | L0168 | Retainer Plate | SUS304 | |
| 2 | L0157 | O-Ring, Case (VC) | FKM (Viton) | |
| 2 | L0156 | O-Ring, Case (VH) | EPDM | |
| 2 | L0161 | O-Ring, Adapter (VC) | FKM (Viton) | |
| 2 | L0160 | O-Ring, Adapter (VH) | EPDM | |
| 1 | L0794 | Oil Seal | NBR | |
| 1 | L1112 | Bearing (4T-30203) | Steel | |
| 2 | L0101 | Adapter | PVC | |
| 8 | L1168 | Hex Bolt with Washer | SUS304 | |
| 1 | L0166 | Reinforcing Plate | Steel | |
| 1 | L0752 | Oil Gauge (3/8") | - |
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | Iwaki LK-F57 (VC/VH) |
| Rated Power | 0.2 kW / 0.25 kW (4-Pole) |
| Voltage / Frequency | 230/400V / 50 Hz (3-Phase) |
| Rated Current | ~1.2 A (Depending on Motor) |
| Discharge Connection | DN20 / DN25 Flange or Union |
| Impeller Type | Mechanical Diaphragm (PTFE) |
| Installation Type | Horizontal / Positive Suction Recommended |
Troubleshooting, Common Faults & Solutions
Pump does not start
Likely Cause: Power supply failure or disconnected wiring.
Action / Part: Check voltage and wiring connections. Reset thermal overload if tripped.
Pump operates but no discharge
Likely Cause: Air lock in pump head or suction line blocked.
Action / Part: Release air via air vent valve. Clean Suction Strainer.
Fluctuating discharge quantity
Likely Cause: Debris stuck in valve or worn valve seats.
Action / Part: Clean or replace Valve Balls (L0151) and Seats (L0153).
Liquid leakage from pump head
Likely Cause: Loose head bolts or ruptured diaphragm.
Action / Part: Tighten bolts (L1168) or replace Diaphragm (L0167).
Abnormal noise or vibration
Likely Cause: Worn worm gear or bearings in drive unit.
Action / Part: Inspect/Replace Bearings (L1112) or Oil Seal (L0794).
Online Resources
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