Constant level oilers for consistent lubrication control

Constant level oilers are essential components in lubrication systems where maintaining a precise oil level is critical - particularly in applications such as rolling element bearings. These devices automatically regulate oil levels within a sump or housing, helping to ensure consistent and efficient lubrication without the need for manual checks.

How do constant level oilers work?

A constant level oiler operates by maintaining a fixed oil level inside the equipment housing. When the oil level drops below the preset point, oil from the reservoir flows into the sump until the correct level is restored. This self-levelling mechanism relies on gravity and pressure balance, ensuring the right volume of oil is always present for optimal performance.

As long as the reservoir contains oil, the system will continue to function without intervention, providing reliable lubrication even in demanding operational environments.

Designed for demanding industrial environments

Constant level oilers are widely used across the chemical, petrochemical, and process industries, where precision and reliability are paramount. They offer peace of mind by eliminating the risk of overfilling or under-lubrication—two common causes of premature equipment wear.

These oilers are compatible with a wide range of systems and are available with either BSP or NPT threaded connections. Customers can choose from robust plastic or durable glass reservoirs, with capacities ranging from 85 cc to 500 cc, depending on the specific application requirements.

Key features

Automatically maintains consistent oil levels
Ideal for rolling bearings and similar components
Reduces the need for manual oil checks
Minimises the risk of bearing failure due to oil loss
Suitable for high-demand environments
Available in multiple sizes and connection types

Whether you’re running a continuous process plant or a piece of standalone machinery, a constant level oiler is a practical and efficient way to ensure your lubrication system remains in top condition.

FAQ Constant Level Oilers

FAQ - Constant Level Oilers

What is the main purpose of a constant level oiler?

A constant level oiler is designed to automatically maintain a fixed oil level in machinery such as bearing housings. This helps ensure reliable lubrication at all times, preventing equipment damage caused by low oil levels or inconsistent lubrication.

Can constant level oilers be used in high-temperature environments?

Yes, many constant level oilers—especially those with glass reservoirs—are suitable for use in elevated temperature conditions commonly found in chemical and process industries. However, always check the manufacturer’s specifications to ensure compatibility with your operating environment.

What sizes and capacities are available?

Constant level oilers are available in a variety of capacities, typically ranging from 85 cc to 500 cc. They also come with different connection types, such as BSP and NPT threads, to suit various machinery setups.

Do I need to manually refill the oiler frequently?

Manual refilling is only necessary when the reservoir runs low. As long as the reservoir has sufficient oil, the system will automatically regulate and top up the lubrication point as needed. Regular inspections are recommended to ensure the reservoir remains filled.

Are constant level oilers suitable for all types of machinery?

While they are highly effective in many applications—especially for rolling element bearings—not all equipment requires a constant oil level. It’s important to evaluate the lubrication needs of your machinery. If in doubt, contact a lubrication specialist to assess suitability.

Constant level oilers

How do I know if a Constant Oiler is right for my equipment?

If your machinery runs for long hours, works in dusty or dirty conditions, or requires frequent manual lubrication, a Constant Oiler can be a game-changer. It automates lubrication and reduces human error, ensuring consistent application and better performance.

For example, conveyor systems in production facilities often experience premature wear due to poor lubrication practices. A Constant Oiler eliminates that risk by delivering a controlled amount of oil exactly when and where it’s needed.

Ready to reduce maintenance and boost uptime?

A Constant Oiler system is a small investment that delivers long-term returns by protecting your assets, reducing labour costs, and minimising downtime. Whether you're upgrading an existing setup or designing a new one, Lubretec has the experience and product range to support your goals.

Download flyer

Visit the webshop