- General introduction
SKF 390 metering devices are grease/oil dispensing devices used in progressive lubrication systems. With a modular design, high durability and accurate metering, the 390 series is suitable for many heavy-duty industrial applications, including mining, cement, steel, construction and special-purpose vehicles.
As part of SKF’s automatic lubrication ecosystem, the 390 device ensures a continuous and even supply of lubricant to every required point, extending equipment service life and reducing maintenance costs.
- Operating principle
The SKF 390 metering device operates according to a progressive principle. When the pump creates pressure, the first piston in the divider moves and delivers a measured amount of grease or oil through its corresponding outlet. This movement activates the next piston, repeating in a fixed sequence and ensuring that each lubrication point operates only when the preceding point has received sufficient lubricant.
👉 Advantage: if one point becomes blocked, the entire system stops, making faults easy to detect and lubrication condition easy to control.
- Construction and technical specifications
Modular structure: includes an inlet block, intermediate blocks and an outlet block
Metered volume: 0.2–1.2 cm³ per cycle/piston
Number of outlets: 3 to 24 ports (can be connected in parallel or individually)
Operating pressure: maximum 350 bar
Operating temperature: -25°C to +70°C
Lubricant: NLGI 000 to 2 grease or ISO VG ≥ 40 lubricating oil
Construction material: galvanized steel or stainless-steel body
- Key advantages
✅ Visual monitoring: Can integrate a piston-stroke monitoring switch (proximity switch)
✅ Precise flow control: Grease/oil flow is metered for each point
✅ Sequential distribution: All points receive lubrication in a clearly defined sequence
✅ Flexible expandability: Blocks can be added or removed easily to increase or reduce the number of lubrication points
✅ System blockage protection: Quickly detects a fault when a point is not operating
- Typical applications
🏗 Construction machinery: loaders, bulldozers and cranes
🪨 Mining and quarrying: crusher systems, conveyors and vibrating screens
🏭 Steel and cement industries: heating, pressing, rolling and mixing lines
🚜 Agricultural and special-purpose vehicles
🔧 Heavy industrial machinery: hydraulic presses and pellet presses
- Monitoring options
SKF offers options for integrating piston-monitoring sensors to track the operating condition of each cycle. When a metering fault occurs (piston blockage or pressure loss), the system issues an alert so maintenance can be performed promptly.
- Conclusion
The SKF 390 metering device is an optimal choice for progressive lubrication systems in industries that require durability, performance and strong monitoring capability. With its flexible modular design, high accuracy and ability to operate continuously under high pressure, the product helps protect equipment, reduce downtime and improve operating efficiency.
For detailed information, please contact 02466880598
