There are many different types of hydraulic seals, and it can be difficult to keep track of them all. Each type has its own unique benefits and drawbacks, so you need to understand them all before you make a purchase.

This post highlights the two most common types of hydraulic seals and what makes them unique.

Piston Seals

Piston seals are one of the most important types of hydraulic seals. They seal the space between the piston and the cylinder wall to prevent hydraulic fluid from leaking out. Piston seals come in various materials, including PTFE, rubber, and metal.

Piston seals are available in a variety of sizes and shapes. The most common type is the U-cup seal, designed to fit around the piston. Other types of piston seals include V-rings and O-rings.

Piston seals are typically made from PTFE, rubber, or metal. PTFE is a synthetic material that is resistant to hydraulic fluids and chemicals. Rubber is a natural material that is also resistant to hydraulic fluids and chemicals. Metal piston seals are made from stainless steel or brass.

Piston seals can be single or double-acting. Single-acting piston seals only prevent hydraulic fluid from leaking out of the cylinder. Double-acting piston seals prevent hydraulic fluid from leaking into the cylinder as well.

Piston seals are available in a variety of hardness levels. The most common hardness level is 70 durometer. Other hardness levels include 60 durometers, 80 durometers, and 90 durometers.

Why are hardness levels important? The hardness level of a piston seal determines its resistance to hydraulic fluid and chemicals. The higher the durometer, the more resistant the seal is to hydraulic fluid and chemicals.

Rod Seals

Hydraulic rod seals are sealants used in various applications, including construction, automotive, and manufacturing. They work by sealing the space between the hydraulic rod and the housing. This prevents hydraulic fluid from leaking out of the system.

Hydraulic rod seals are made from various materials, including rubber, polyurethane, and PTFE. Some of the most common features of hydraulic rod seals include:

• A dynamic lip that helps create a seal between the surfaces
• A secondary lip that provides a backup seal in case the primary seal fails
• A wear-resistant outer diameter that helps protect the seal from abrasion
• An anti-extrusion ring that prevents the seal from being forced out of place

Hydraulic rod seals are best suited for applications where there is a need to create a physical barrier between two surfaces, preventing the escape of fluids or the entrance of contaminants. This feature makes them perfect for use in construction, automotive, and manufacturing applications. Look into hydraulic seals for more information.