Glyd rings and step seals are the most common types of hydraulic cylinder seals. Let’s take a look at their installation methods and installation precautions.
Installation method
Glyd rings are piston seals. Generally, the O-ring is installed first, followed by the Glyd ring’s wear ring.
Smaller sizes are typically installed directly. First, heat the ring with oil, but keep the oil temperature low. Once the wear ring softens, slide it onto the shaft and then cool it.
Larger sizes of Glyd rings require a tapered sleeve, which is pushed from the small end to the large end until it is seated in the groove.
Step seals are rod seals, also installed with the O-ring first, followed by the step seal’s wear ring. Heat the wear ring, then slide it onto the shaft and let it cool. When installing the wear ring, press it slightly inward along its diameter before installing it into the groove and smoothing out any deformation.
When placing the shaft, be sure that the shaft is fully seated in the wear ring. Also, ensure that the guide band does not get stuck on the shaft, as this could squeeze out of the groove and damage the step seal.
Note
To avoid damage to the sealing lip and potential leakage before full operation, extreme care must be taken during installation.
1. Sharp edges must be deburred, rounded, and chamfered according to specific installation requirements.
2. Threads, guide ring grooves, and other surfaces must be covered, as seals cannot be pushed through grooves, drilled holes, or rough surfaces.
3. Dust, dirt, debris, and other foreign matter must be carefully removed.
4. The cylinder, piston, piston rod, and seal must be oiled and greased before installation, taking into account the compatibility with the sealing medium.
5. In heated oil or hot water (approximately 80°C-120°C), seals can easily expand and return to their original shape.
6. Tools used for installation must be made of soft material (such as polyamide) and have no sharp edges.
TYS offers a comprehensive range of hydraulic seals. SPGO Glyd Rings and GSJ Step Seals are among our most competitive products. They are made from PTFE. We have developed over 120 types of modified PTFE in-house, enabling us to offer high-quality Glyd Rings and Step Seals at competitive prices.
Feel free to contact us for a free quote or sample if you need it.
