What are Andman FP40-500 Pumps?
Andman FP40-500 Paper Pumps are in FP Series Pumps, FP Series pumps are specialized paper mill fan pumps designed to provide high-volume, stable pulp circulation for approach flow and headbox systems. They are critical pumps in modern high-speed paper machines.
Common Andman FP Series Models
| Model | Typical Application |
| FP40-400 | Small/medium paper machines |
| FP40-500 | Medium capacity fan pump |
| FP40-700 | Large paper machine circulation |
| FP60-500 | Medium-large approach flow systems |
| FP80-600 | Large paper production lines |
| FP80-800 | Very high-capacity paper machines |
FP Series Pumps vs S Series Pumps
| Item | FP Pump | S Pump |
| Main purpose | Fan pump for paper machines | General process pump |
| Design | Double suction split case | Single suction centrifugal |
| Flow | Very high | Medium to high |
| Head | Low-medium | Medium-high |
| Main industry | Pulp & paper | Pulp, sugar, chemical, water |
| Application | Headbox/approach flow | Process transfer |
Andman FP40-500 Pumps Design Features
1. Double-Suction Split-Case Design
2. High Flow, Low-to-Medium Head Design
FP pumps are designed for large-volume circulation duties:
Typical range:
3. Excellent Fiber Handling Capability
FP pumps are designed for paper stock containing fibers:
The hydraulic design helps:
Andman FP40-500 Pumps Spare Parts
For maintenance, common FP40-500 pumps replacement parts include:
Impeller, Pump casing (upper/lower split casing), Shaft, Shaft sleeve, Mechanical seal / packing, Bearings, Wear rings, Gaskets, O-rings etc.
| Pump Part | Typical Materials | Function |
| Pump casing (upper/lower casing) | Cast Iron (EN-GJL-250), Ductile Iron, Stainless Steel, Duplex Stainless Steel | The casing material depends on corrosion requirements and process conditions |
| Casing cover | Cast Iron, Stainless Steel, Duplex Stainless Steel | Split-case structure for easy maintenance |
| Impeller | Cast Iron, Stainless Steel, Duplex Stainless Steel (1.4460/1.4462), Super Duplex | Double-suction closed impeller; material selected according to pulp characteristics |
| Shaft | Stainless Steel (1.4021, 1.4462 etc.) | Designed for high rigidity and low deflection |
| Shaft sleeve | Stainless Steel / Duplex Stainless Steel | Protects shaft in sealing area |
| Wear rings / wear parts | Stainless Steel, Duplex Stainless Steel, hardened materials | Reduce wear and maintain efficiency |
| Bearing housing | Cast Iron | Supports bearings and rotating assembly |
| Mechanical seal parts | Mechanical seal parts | Depends on sealing arrangement |
| Gaskets & O-rings | EPDM, NBR, FKM (Viton) | Selected according to temperature and chemical conditions |
Andman FP40-500 Pumps Applications
1. Paper Machine Approach Flow System
Transfer pulp suspension to the headbox
Maintain stable flow for paper formation
Circulate stock through screens and cleaners
2. White Water Circulation
White water recovery systems
Fiber recovery loops
Process circulation
3. Low Consistency Pulp Pumping
Bleached pulp
Recycled fiber pulp
Stock preparation systems
Why Andman FP Series Pumps Suitable for Paper Mills?
1. High Flow Capability
The double-suction design provides:
Large capacity
Better suction performance
Lower axial thrust
2. Low Pulsation Operation
Important for:
High-speed paper machines
Stable headbox pressure
Better sheet formation
3. Energy Efficiency
The double-flow impeller design helps achieve high efficiency and lower operating costs.
Andman Typical FP40-500 Pumps Pumping Media
| Medium | Application |
| Low consistency pulp (≤2%) | Fan pump / headbox supply |
| White water | Circulation system |
| Filtrate water | Fiber recovery |
| Process water | Industrial circulation |
| Cleaner feed stock | Cleaner feed stock |
Why Paper Mills Choose Andman FP Pumps?
Andman FP pumps are mainly used as fan pumps, headbox pumps and cleaner pumps in paper mills, where stable pulp circulation and high efficiency are critical for continuous paper production.
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