195-78-41320 1957841320 Excavator Spare Parts High Quality Relief Valve D375A-3A D355A-3

1. Quick Details of  seal 195-78-41320:

2.  195-78-41320 parts on group :

3.  195-78-41320 picture:

4. Service part number :

 
5. FAQ

Q: What is this O-ring seal and what does it do?

A: This is a rubber O-ring seal, a simple, round static or dynamic sealing element used to prevent leaks of hydraulic fluid, oil, or gas between mating parts in a wide range of equipment, including excavators and hydraulic systems.

Q: What materials is this O-ring typically made of?

A: This orange-colored O-ring is most commonly made of silicone or FKM (Viton), though NBR (nitrile rubber) is also widely used; silicone is known for its heat resistance, while FKM offers excellent chemical and high-temperature stability.

Q: How do these materials perform in different conditions?

A: Silicone O-rings can handle temperatures from -60°C to +200°C and are flexible in extreme cold, while FKM (Viton) O-rings resist high temperatures up to +250°C and aggressive fluids like synthetic hydraulic oils, making them ideal for heavy-duty applications.

Q: How do I install an O-ring seal correctly?

A: Clean the groove and mating surfaces thoroughly, lubricate the O-ring with a compatible fluid to prevent pinching or tearing, install it without twisting, and ensure it sits fully in the groove before assembling the parts.
6. Exhibition and Wearhous

Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More