Hydraulic cylinders are used to perform work in a bevy of different situations and applications every day. Whether it’s the plow truck clearing the road, a utility vehicle fixing an electrical issue, or a compactor at the local recycling center—hydraulic cylinders are in motion almost everywhere. With hydraulic cylinders, there is more than … [Read more...] about What types of seals are used in hydraulic cylinders?
Seals
What’s the difference between single acting and double acting piston seals?
Piston seals or piston rings are used in hydraulic cylinders for fluid sealing. They are designed to ensure that pressurized fluid does not leak across the cylinder head as the system pressure pushes the piston down the cylinder bore. There are two main types of hydraulic cylinder piston seals—single-acting and double-acting. Single-acting … [Read more...] about What’s the difference between single acting and double acting piston seals?
Hydraulic seals battle extreme cold
Low-temperature chemistry and innovative hydraulic seal designs prevent weeps and leaks. By Ryan Webster, Hallite Seals Americas and Mark Haggerty, Hallite Seals Canada Equipment used in industries like construction, transportation, forestry, agriculture, mining and mineral extraction requires hydraulic seals fit for extreme temperatures. … [Read more...] about Hydraulic seals battle extreme cold
Trelleborg expands HiMod Slydring wear ring range for hydraulic cylinders
Trelleborg Sealing Solutions has expanded its HiMod Slydring HC wear ring range. It is introducing more than 180 additional part numbers in outer diameters from 1 to 12 in. The enhanced range becomes available early 2018, serving various fluid power applications including off-highway, material handling, industrial machines, mobile hydraulics, … [Read more...] about Trelleborg expands HiMod Slydring wear ring range for hydraulic cylinders
5 factors to consider when designing FDA seals for food contact
When considering seal design for FDA seals, specifically for food contact, there are 5 factors that must be considered: 1. Operating conditions This might sound obvious, but a seal designer may focus on different concerns than you would with regard to the operating conditions. Too often a seal designer is asked to focus on one particular … [Read more...] about 5 factors to consider when designing FDA seals for food contact
Trelleborg finalizes acquisition of advanced composites manufacturer
Trelleborg, a worldwide provider of engineered polymer components and systems, has through its business area Trelleborg Sealing Solutions fully acquired U.S.-based privately-owned Automated Dynamics, an advanced composite components manufacturer. According to Trelleborg officials, the “bolt-on” acquisition provides new, strategic technology to … [Read more...] about Trelleborg finalizes acquisition of advanced composites manufacturer
High-tech compounds against explosive decompression
Sealing compounds used in the applications above often create a barrier against gaseous media if highly pressurized gas falls to a very low-pressure level within a very short period of time. The result of this process is often a damage of the sealing. The elastomer material is either torn in various places or blistering on the surface. This process … [Read more...] about High-tech compounds against explosive decompression
COG FKM seal material Vi 840
One of the central demands from the valve sector and gas industry has been for a seal material that has suitable low-temperature flexibility, and which conforms to the DIN EN 14141 standard. Up until now, there simply hasn’t been a suitable FKM seal material available. But now, the independent seal manufacturer COG has developed a special FKM … [Read more...] about COG FKM seal material Vi 840
Where are rod seals used?
The rod seal is one of the most critical seals on any type of fluid power equipment. The rod seal prevents the pressurized hydraulic fluid within the cylinder from leaking. Leakage can lead to reduced equipment performance, system failure, and environmental/safety issues. As illustrated at right, rod seals are dynamic seals that are positioned … [Read more...] about Where are rod seals used?
Duo-material seals combine strength and flexibility
Fluid-power engineers who design sealing systems always have to weigh the trade-off of minimizing leaks versus shorter operating life. In hydraulic applications, seals made from two polyurethane components could resolve the conflict between sealing tightness and strength. Freudenberg Sealing Technologies, Weinheim, Germany, is now conducting … [Read more...] about Duo-material seals combine strength and flexibility