O-ring 335x5.3 FPM/FKM (Viton)

Technical specifications and material

The O-ring 335x5.3 FPM/FKM (Viton) is a premium sealing ring made of fluoroelastomer (FPM/FKM) - a high-grade synthetic rubber known for exceptional chemical and thermal resistance. With an inner diameter of 335 mm and a cross-section of 5.3 mm, this O-ring is engineered for demanding industrial applications requiring long-lasting performance under exposure to oils, fuels, greases, and aggressive chemicals.

The Viton® compound ensures stability in a wide temperature range from −20 °C to +200 °C, maintaining elasticity and sealing efficiency under pressure. Thanks to its low compression set and high density, this technical sealing ring performs reliably in both static and low-dynamic sealing environments.

Industrial applications and advantages for B2B customers

The 335x5.3 FKM O-ring is widely used in hydraulic systems, pneumatic valves, compressors, pumps, gearboxes, and chemical processing equipment.
It offers key advantages appreciated by industrial maintenance and engineering teams:

• Outstanding resistance to oils, fuels, and solvents,

• Excellent durability at high temperatures and pressures,

• Minimal deformation and long service life in harsh environments,

• Compliance with DIN 3771 dimensional standards for easy installation and interchangeability.

Due to its superior material properties, FKM is a preferred choice in applications where standard NBR seals fail — especially in automotive, chemical, and process industries.

Installation and usage guidelines

Before installation, ensure that the groove and shaft are clean, smooth, and free from sharp edges. Light lubrication with a fluor-compatible grease or oil is recommended to prevent damage during fitting. The O-ring should be fitted evenly without twisting.
In operation, FPM/FKM O-rings retain sealing efficiency even in continuous exposure to oils, synthetic lubricants, and fuels. For aggressive chemicals such as ketones or amines, alternative materials like PTFE may be considered. Regular inspection of the seal surface and operating media extends the service life of the system.

FAQ - Frequently Asked Questions

Q1: What material is this O-ring made of?
A1: The O-ring is made from FPM/FKM (fluoroelastomer), known as Viton®, which provides high resistance to oils, fuels, heat, and chemical exposure.

Q2: What are the typical applications of an FKM O-ring?
A2: It is used in hydraulic and pneumatic systems, pumps, valves, engines, compressors, and chemical process installations where resistance to oils and heat is essential.

Q3: What is the temperature range for FKM/Viton O-rings?
A3: The standard operating range is −20 °C to +200 °C, depending on the medium and pressure conditions.

Q4: How does FKM differ from NBR?
A4: FKM offers much higher temperature and chemical resistance than NBR, making it ideal for aggressive industrial environments and high-performance machinery.

Q5: How fast is the delivery?
A5: 📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4
🚚 24h Delivery - fast B2B order processing and dispatch.