Emission-free chemical injection | Vmac™ Series model D
The Vmac™ Series is an electrically driven positive displacement (plunger) pump, designed specifically to replace gas-driven pumps and prevent toxic emissions from escaping into the environment. It helps you meet strict regulatory requirements while improving operational efficiency. The Vmac™ model D uses dual spring-loaded lip seals and an integrated worm and gear drive that deliver unmatched reliability and environmental safety.
Ideal for: Oil and gas production, pipelines and process plants
Maximum pressure: Up to 344.7 bar (5,000 psi)
Maximum flow: Up to 171.7 l/d (45.4 gpd)
Key applications: Accurate injection of methanol, biocides, corrosion inhibitors, defoamers and H2S scavengers
Features
The Vmac™ Series model D is available in 2 different standard gear ratios and 3 plunger sizes to meet your exact process requirements. The pump is built with the following key features to ensure long service life and optimal operation:
Robust construction: Durable, powder-coated and sealed metal housing designed to withstand harsh environments.
Smooth flow: A solid metal worm and gear drive, combined with a variable eccentric stroke length mechanism, gives a 10:1 turndown ratio with a smoother flow.
Precision control: The accurate stroke length adjustment can be operated whether the pump is running or stopped.
Extended service life: All gear components move in a continuous oil bath. The proven Williams double sealing arrangement gives a longer, leak-free life, especially in combination with a ceramic plunger (standard version).
High accuracy: Steady-state accuracy of ± 1 % of full capacity across a 10:1 turndown range.
Material quality: Liquid end housing manufactured in 316 stainless steel (316SS) for excellent corrosion resistance.
Easy maintenance: No packing that requires re-adjustment. Suction and discharge check valves are supplied with composite seats for long life and 100 % positive sealing.
Optimal alignment: C-face direct motor mounting ensures perfect shaft alignment.
Performance
Vmac D Capacity / Pressure Table
| Plunger | Gear Ratio | Strokes/ Min 60 Hz 1725 RPM |
Capacity/ Pressure @ 60 HZ | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Diameter | Code | Ratings at 100 psi | Capacity at Max Pressue | ||||||
| GPD | LPD | GPD | LPD | PSI | BAR | ||||
| 1/4" 6.35mm |
250 | 40:1 | 43 | 5.4 | 20.4 | 3.7 | 13.9 | 5000 | 344.7 |
| 20:1 | 86 | 10.8 | 40.9 | 7.6 | 28.6 | 5000 | 344.7 | ||
| 3/8" 9.5mm |
375 | 40:1 | 43 | 12.5 | 47.4 | 11.0 | 41.7 | 2250 | 155.1 |
| 20:1 | 86 | 23.8 | 89.9 | 20.7 | 78.5 | 2250 | 155.1 | ||
| 1/2" 12.7mm |
500 | 40:1 | 43 | 22.5 | 85.0 | 21.2 | 80.1 | 1250 | 86.2 |
| 20:1 | 86 | 45.4 | 171.7 | 41.0 | 155.3 | 1250 | 86.2 | ||
| Plunger | Gear Ratio | Strokes/ Min 50 Hz 1425 RPM |
Capacity/ Pressure @ 50 HZ | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Diameter | Code | Ratings at 100 psi | Capacity at Max Pressue | ||||||
| GPD | LPD | GPD | LPD | PSI | BAR | ||||
| 1/4" 6.35mm |
250 | 40:1 | 36 | 4.5 | 17.0 | 3.1 | 11.6 | 5000 | 344.7 |
| 20:1 | 72 | 9.0 | 34.1 | 6.3 | 23.8 | 5000 | 344.7 | ||
| 3/8" 9.5mm |
375 | 40:1 | 36 | 10.4 | 39.5 | 9.2 | 34.7 | 2250 | 155.1 |
| 20:1 | 72 | 19.8 | 74.9 | 17.3 | 65.4 | 2250 | 155.1 | ||
| 1/2" 12.7mm |
500 | 40:1 | 36 | 18.7 | 70.8 | 17.6 | 66.7 | 1250 | 86.2 |
| 20:1 | 72 | 37.8 | 143 | 34.2 | 129.4 | 1250 | 86.2 | ||
