Pneumatic Grease Pump For Auto And Industrial Use

1.What is an Air Grease Pump and how does it work?

Purchase pneumatic grease pumps in bulk from WYMA® now. It is a device that uses compressed air as power to achieve high-pressure grease injection through the principle of pressure amplification. The core of this device is a connecting rod that joins the air piston to the grease piston. As compressed air enters, it pushes down on the large-area air piston. That motion transfers directly through the rod to the smaller grease piston below. Because the grease piston has a much smaller surface area than the air piston, the force applied creates intensely magnified pressure—dozens or even hundreds of times higher than the input pressure. This is Pascal’s principle in action. It use that force to push lubricant out from the pump body, delivering it steadily through a high-pressure hose and grease gun nozzle directly to the point of lubrication. Inside the system, a directional control valve continuously reverses the airflow, which allows the air piston to move up and down repeatedly. That reciprocating motion is what gives you a consistent and reliable flow of grease.

2.What specifications and styles of Pneumatic Grease Pumps does WYMA offer? What are their features or advantages?

We offer our products in 12L/3gal, 20L/5gal and 40L/12gal capacities, with your choice of two output pressure ranges: 30–40 MPa or 40–50 MPa. In addition to conventional pour-in models, we also provide a bucket-in version that lets you place a full grease bucket directly into the unit—which makes it very convenient for continuous use. Our pump head series includes high-flow model and enhanced model that work with #0–#3 viscous grease, even in cold conditions, and can also handle high-temperature grease up to 300°C, this variety helps us match many different lubrication needs. The barrel is built with a 13 mm thickened corrosion-resistant alloy that we can rely on for long-term durability. The grease gun delivers smooth, fast flow and can rotate 360 degrees for flexible operation. Equipped with universal casters, our pumps are easy to move around. Our products are now widely used in the lubrication of mechanical equipment, ships, vehicles, industrial and agricultural equipment and bearing equipment.

3.What are the differences in common uses for different styles?

Different grease pump heads typically have different capacities or specifications. Large-capacity models are typically used in applications requiring high lubrication volumes, such as construction machinery and shipbuilding and port equipment, while small-capacity models are typically used in agricultural machinery, auto repair shops, and small workshops. We know that the pneumatic pump head is the most important component of an air grease pump. We offer a wide variety of grease pump heads. High-capacity pneumatic pump heads are often used in applications requiring high lubrication volumes and are typically paired with large-capacity grease barrels. We also offer pneumatic pump heads capable of pumping 300°C high-temperature grease and thicker greases #0-#3, making them ideal for winter lubrication and other extreme working conditions. Want to learn more? Contact our professional service team.

4.What are its main performance parameters? What do they reflect? How should I choose one?

The pneumatic grease pump has the following core performance parameters: Pressure Ratio, Grease Output, and Applicable Viscosity. 

The Pressure Ratio reflects how effectively the pump converts air supply pressure into higher output pressure, a higher ratio directly improves usability in demanding conditions—meaning you can achieve strong performance even with lower input pressure.

Grease Output, which we measure in g/min or ml/min, tells you how much grease the machine can deliver per minute. If you're working on large applications or want to finish lubrication tasks faster, this is a key spec you’ll want to pay close attention to. 

Then there’s Applicable Viscosity, it usually expressed in NLGI grades. Our pumps are designed to handle a wide range of grease consistencies, all the way from NLGI #000 up to #3. We generally believe that a good quality grease pump is compatible with greases of various viscosities to suit different application scenarios.

You might be wondering—how should you actually choose a grease pump that fits your needs? It starts with the grease: #2 is the general standard for routine maintenance, #3 is suitable for high-pressure, high-temperature, heavy-duty equipment, and #1 and #0 are suitable for low temperatures or systems requiring high fluidity. In cold weather, it's recommended to choose the grease with a lower viscosity to prevent pumping difficulties. From there, think about the pump head. Which kind fits your situation—do you need high flow & high pressure, better performance with thick grease in the cold, or a balance of flow and temperature? Once you know what type of pump head will you use, what grease you’re using, and about how much the approximate amount of grease you’ll use, the right grease pump becomes much easier to identify.

5.How does WYMA ensure the quality of grease pumps? Are all pumps in stock? Are customized colors and logos supported?

All our air grease pumps comply with the EU’s Machinery MD-CE certification, which we believe is essential for delivering safety, reliability, and long-term durability. Every model you see on our website is currently in stock—we work to maintain strong availability so you can order with confidence. We also provide custom color and logo options. If you’re interested, just reach out to our pro team. We’ll be glad to help with volume needs or any other customization details you have in mind.

6.How to get the latest quotation from WYMA?

You can click "Send Inquiry" on the top of the product introduction page of our website to jump to the inquiry content form to send us an inquiry. Our staff will reply to you as soon as possible to communicate the details and tell you how to place an order. Alternatively, you can contact us through the following contact information.

For 24 hours contact details as below:

Email:

sales01@wymatools.com / sales03@wymatools.com

Tel / WhatsApp / Wechat:

+86-133 6036 8438 / +86-136 2252 8472