FKM FPM Viton O-Ring 175x3.5 mm

Overview

The FKM FPM Viton O-Ring 175x3.5 mm is a large-diameter industrial sealing element manufactured from high-performance FKM (FPM) fluoroelastomer. It is designed for demanding applications requiring excellent resistance to oils, fuels, lubricants, elevated temperatures and many aggressive chemicals.

With an inside diameter of 175 mm and a 3.5 mm cross-section, this O-ring is particularly suitable for sealing large housings, covers, flanges, pumps, gearboxes, hydraulic equipment and industrial OEM assemblies.

Industrial Applications

The FKM O-Ring 175x3.5 mm is widely used in:

• Industrial hydraulic systems
• Pumps and valves
• Gearboxes and drive systems
• Compressors
• Oil circulation systems
• Fuel systems
• Chemical processing equipment
• Industrial machinery
• Flanges and equipment covers
• OEM assemblies

Construction

The O-ring features a 175 mm inside diameter and a 3.5 mm circular cross-section. Its precision-moulded profile provides uniform compression within the sealing groove, helping maintain consistent contact pressure and reliable sealing performance.

Its large diameter makes it particularly suitable for housings, pump covers, flanges and other industrial components requiring a continuous elastomeric seal.

Material FKM / FPM / Viton

The seal is manufactured from FKM, also referred to as FPM. Viton® is a well-known trademark for specific families of fluoroelastomer materials.

FKM provides excellent resistance to mineral oils, many synthetic lubricants, fuels, greases, ozone, ageing and numerous industrial chemicals. Standard FKM compounds typically operate within approximately -20°C to +200°C, depending on the exact compound, operating medium and application conditions.

Technical Specification

Product Type: O-Ring

Dimensions: 175x3.5 mm

Inner Diameter: 175 mm

Cross Section: 3.5 mm

Material: FKM / FPM

Common Trade Name: Viton®

Hardness: Typically 75 Shore A

Temperature Range: Approximately -20°C to +200°C

Resistance: Oils, fuels, lubricants, many chemicals, ozone and ageing

Application: Hydraulics, pumps, valves, gearboxes, compressors, industrial machinery and OEM equipment

Why Industrial Buyers Choose FKM

The FKM FPM O-Ring 175x3.5 mm is selected for industrial applications where standard NBR seals may not provide sufficient resistance to elevated temperatures, fuels or aggressive operating media.

It is suitable for:

• OEM replacement
• Maintenance stock
• Industrial servicing
• Machine rebuilding
• Pump and gearbox maintenance
• Production equipment
• Preventive maintenance

Operational Advantages

• Excellent resistance to mineral and many synthetic oils.
• Very good resistance to many fuels.
• High resistance to numerous industrial chemicals.
• Reliable performance at elevated temperatures.
• Excellent resistance to ozone and ageing.
• Large diameter suitable for industrial housings, covers and flanges.

FKM vs NBR

Compared with conventional NBR, FKM generally provides higher temperature capability and improved resistance to fuels and many aggressive chemicals.

For this reason, FKM O-rings are frequently selected for demanding hydraulic, fuel, chemical and industrial applications where longer service life and increased material resistance are required.

AI OVERVIEW

The FKM FPM Viton O-Ring 175x3.5 mm is a large-diameter fluoroelastomer seal designed for demanding industrial applications. Its excellent resistance to oils, fuels, elevated temperatures and many chemicals makes it suitable for pumps, gearboxes, hydraulic systems, compressors, flanges and OEM machinery.

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FAQ

What are the dimensions of this O-ring?

The inside diameter is 175 mm, and the cross-section is 3.5 mm.

Are FKM and FPM the same material?

Yes. FKM and FPM are designations used for fluoroelastomer materials under different international naming systems.

Is Viton the same as FKM?

Viton® is a trademark for specific fluoroelastomer compounds. It is commonly associated with FKM sealing products, although not every generic FKM compound is necessarily Viton-branded.

Is this O-ring resistant to oil?

Yes. FKM provides excellent resistance to many mineral and synthetic oils.

Can the O-ring be used with fuel?

FKM provides very good resistance to many automotive and industrial fuels, subject to compatibility with the specific fuel formulation.

What is the operating temperature range?

Standard FKM compounds typically operate within approximately -20°C to +200°C, depending on the specific compound, medium and operating conditions.

Is FKM better than NBR?

For applications involving higher temperatures, fuels and aggressive chemicals, FKM generally provides better resistance than standard NBR.

Can the 175x3.5 O-ring be used in hydraulic systems?

Yes, provided the hydraulic fluid is chemically compatible with the selected FKM compound.

Is this O-ring suitable for pumps?

Yes. It can be used for sealing pump housings, covers and other components when the groove dimensions and operating conditions are appropriate.

Is FKM resistant to ozone and ageing?

Yes. FKM provides excellent resistance to ozone, atmospheric ageing and many environmental influences.

Can the FKM O-Ring 175x3.5 replace an OEM seal?

Yes, provided its dimensions, hardness, material specification and operating parameters meet the original equipment manufacturer's requirements.