Overview
The Alkin W3 Series is a three-stage, oil-lubricated reciprocating high-pressure booster. It takes a compressed feed supply — shop air or nitrogen — at 45–75 PSI and boosts it up to 5000 PSI (approximately 345 bar). All models are canopy-enclosed, run an AirMaster Q2 PLC controller with automatic start/stop, and include multi-stage filtration and condensate handling. The controller reads in metric units (bar, °C), so metric equivalents are noted alongside the PSI and °F values throughout these articles.
Models & specifications
| Model | Motor | Feed (Inlet) Pressure | Max Output | Output Flow |
|---|---|---|---|---|
| W3-11-345-FP6B | 15 HP (11 kW) | 45–75 PSI | 5000 PSI | 27 CFM |
| W3-15-345-FP6B | 20 HP (15 kW) | 45–75 PSI | 5000 PSI | 40 CFM |
| W3-18-345-FP6B | 25 HP (18 kW) | 45–75 PSI | 5000 PSI | 53 CFM |
Shared specifications (all W3 models)
| Medium | Compressed air or nitrogen |
| Pump | Three-stage reciprocating |
| Max output pressure | 5000 PSI (≈345 bar) |
| Filtration | P61 purifier — particulate & coalescing oil removal (first stage) plus repackable carbon oil-vapor filtration (second stage) |
| Lubricant | Alkin-100 synthetic, approximately 1 gal (4 L) capacity |
| Controller | AirMaster Q2 PLC / HMI, automatic start/stop at any set pressure |
| Enclosure | Electrostatically painted quiet canopy |
| Dimensions (W × L × H) | 38 × 50 × 67 in |
| Weight | 1,760 lb |
| Electric panel | UL / cUL |
Key features
- Three-stage pump boosting to 5000 PSI
- Particulate intake filtration (standard)
- Particulate & coalescing oil-removal filtration (first stage)
- Repackable carbon oil-vapor filtration (second stage)
- Inlet pressure regulator
- Automatic condensate separation and discharge between each stage
- Stainless steel intercoolers and aftercooler
- Supplemental top-discharge cooling fan
- Silenced discharge chamber for condensate/air
- Discharge check valve and pressure-maintaining valve before output
- Low-oil shutdown circuit
- Safety valves on each stage
- Anti-vibration shock mounts
- Automatic start/stop at any pressure of choice
- AirMaster Q2 PLC controller with easily adjusted parameters
- Emergency shut-off switch
- UL / cUL electric panel
Understanding the model number
Using W3-11-345-FP6B as the example:
| Segment | Meaning |
|---|---|
| W3 | Booster pump model (W3 series) |
| 11 | Motor size in kW — 11 kW (15 HP), 15 kW (20 HP), or 18 kW (25 HP) |
| 345 | Maximum output pressure in bar — 345 bar (5000 PSI) |
| F | Canopy (enclosed) configuration |
| P6 | Purifier / carbon post-filter size |
| B | Booster |
| (no trailing number) | Three-stage pump. On other Alkin W-series boosters, a trailing "2" indicates two-stage and "1" indicates single-stage. |
Component identification
The W3 pump is a three-stage, three-cylinder "W" configuration. The diagram below identifies the main pump components referenced throughout the maintenance and troubleshooting articles.
In this series
This Overview is the hub for the Alkin W3 Series documentation. The companion articles below cover the unit end to end:
- Alkin W3 Series Booster — Site & Utility Requirements
- Alkin W3 Series Booster — Receiving, Unpacking & Storage
- Alkin W3 Series Booster — Installation Guidelines
- Alkin W3 Series Booster — Controls & AirMaster Q2 Navigation
- Alkin W3 Series Booster — Preventive Maintenance & Replacement Parts
- Alkin W3 Series Booster — Startup & Commissioning
- Alkin W3 Series Booster — Troubleshooting
- Alkin W3 Series Booster — Safety Guidelines