SKF UN 16X22X4.5 hydraulic seal

SKF UN 16X22X4.5 belongs to hydraulic seal, part of our Seals range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for UN 16X22X4.5 and any equivalents.

The SKF UN series hydraulic seal is a single-lip oil seal built for cylinder rods and hydraulic systems. Its lip holds pressurized fluid while wiping the residual film, which helps keep leaks and contamination out of the circuit. The elastomer compounds used in this line resist mineral and hydraulic oils. We supply this series for industrial and mobile equipment, and we can help you match the size to the part number marked on the old seal.

The UN code tells you the three mounting dimensions. Take UN 16X22X4.5: inner diameter 16 mm, outer diameter 22 mm, height 4.5 mm. Those three figures are what you need to check before ordering. Standard UN part numbers usually carry no extra suffixes, so the numbers after the letters are the dimensions. If you see additional letters, check the manufacturer's catalog to interpret material or design variants.

These seals are found in hydraulic cylinders on agricultural machinery, road equipment, presses, cranes and lifting systems. They also appear in actuators in the metallurgical, plastics and food industries, where pressurized oil has to be contained. Their job is twofold: seal the rod and keep dust or water from entering the circuit.

Selection depends on more than dimensions. Consider the fluid type, working temperature and system pressure. The UN series is made for rods with reciprocating motion, and the lip must face the pressure. Before installation, check the rod surface for burrs or heavy wear and lubricate the lip with the same oil used in the system. Poor alignment or excessive axial play will shorten seal life. If the rod is damaged, repair or replace it before fitting the new seal.

Hydraulic seals are identified by standardized dimensions, so a part number from another brand with the same dimensions may interchange. However, differences in the elastomer compound or lip design can affect performance. We can guide you on compatibility without compromising the integrity of the system.

To replace a hydraulic seal, send us the full part number by WhatsApp or email. With the measurement and a photo of the part, we can identify the SKF UN series reference and quote the right option. We handle technical maintenance and repair inquiries for customers across the United States and in several Latin American countries.