What is Simriz® 134 90 Duro FDA RGD Perfluoroelastomer (FFKM) O-Rings
Simriz® 134 is a 90 Shore A, RGD-resistant, perfluoroelastomer (FFKM) compound designed for the harshest chemical and high-pressure environments from Freudenberg-NOK. It carries broad chemical resistance comparable to PTFE, but with the elasticity of rubber. It is certified for Rapid Gas Decompression (RGD) performance and aligns with NORSOK M-710 Rev. 2 requirements.
This is a compound built for uptime, safety, and long-term performance where standard elastomers simply cannot survive.
20+ Real-World Uses for Simriz® 134
These are the applications your salespeople will hear about daily from oil and gas, chemical processing, energy, semiconductor-adjacent industries, and advanced OEM markets.
Oil & Gas / Energy
- High-pressure gas compressors
- Downhole tools and packers
- Subsea hydraulic control systems
- Sour gas (H₂S) environments
- Valves and actuators exposed to rapid pressure swings
- Blowout preventer (BOP) auxiliary sealing
- High-pressure quick-disconnect couplings
Chemical Processing
- Aggressive acid and caustic chemical pumps
- Mixers and agitators operating under pressure
- High-purity process reactors
- Tank sampling valves
- CIP/SIP lines (steam, ozone, oxidizers)
Power Generation
- Turbine lubrication skids with hot synthetic oils
- High-temperature steam instrumentation
- Hydrogen seal systems and compressors
Pharma / Biotech
- Steam sterilization equipment
- Single-use mixer connectors exposed to solvents
- Peroxide/oxidizer environments
Industrial OEM
- High-temperature bellows seals
- Solvent-based coating and paint systems
- Chemical dosing pumps
- High-end measurement equipment needing zero leakage
General OEM / MRO
- Equipment where downtime costs exceed seal cost
- Customers replacing Kalrez for cost or lead-time reasons
- Any application requiring RGD-resistant 90A material
You’ll see many of these when your customers send in drawings, ask for cross-references, or request “the best possible material” for uptime and cost reduction.
Why Customers Choose Simriz® 134
From a technical standpoint:
- Broad chemical resistance (near-PTFE)
- RGD-resistant for high-pressure gas environments
- 90A hardness for extrusion resistance
- Steam and hot-water tolerant
- Temperature range –15°C to +230°C
- Proven performance in extreme conditions
- Supported by Freudenberg’s vertical integration
(the only FFKM supplier that controls material from monomer to finished part)
From your customer’s standpoint (this is where you shine as TORS):
- Avoids catastrophic equipment failures
- Extends maintenance intervals
- Reduces unplanned downtime
- Protects pumps, valves, and turbines worth millions of dollars
- Prevents safety incidents
- Provides total traceability
- Gives them a dependable supplier with actual service
(which is why they hate the big distributors)
Simriz® 134 – FAQ
Freudenberg Premium FFKM O-Rings for Extreme Chemical & High-Pressure Applications
What makes Simriz® 134 FFKM unique?
- 90A perfluoroelastomer (FFKM) for extreme environments
- PTFE-like chemical resistance
- Hot water and steam stability
- Engineered for high pressure and RGD environments
- Excellent sealing elasticity compared to PTFE parts
Why are my seals cracking or blistering under pressure cycling?
- This is usually Rapid Gas Decompression (RGD) damage
- Simriz® 134 is tested and certified for RGD resistance
- Withstands pressure drops that destroy FKM and generic FFKM
Is Simriz® 134 FFKM suitable for sour gas (H₂S)?
- Yes
- Maintains stability and sealing performance in aggressive sour gas environments
- Prevents swelling, hardening, and cracking
Is Simriz worth the higher price?
- Yes, when equipment uptime is critical
- Reduces unplanned shutdowns
- Extends maintenance intervals
- Protects equipment where failures are costly
How is Simriz better than generic FFKM options?
- Consistent chemistry batch-to-batch
- Proven RGD, chemical, and thermal performance
- Full material traceability
- No blend or filler unpredictability
- Backed by Freudenberg testing facilities
Can Simriz® 134 FFKM handle aggressive solvents?
- Yes
- Stable in aromatic solvents, esters, amines, and other harsh media
- Resists swelling or softening at elevated temperatures
Does Simriz work in steam, SIP, or CIP cycles?
- Yes
- Reliable up to +230°C
- Maintains elasticity after repeated steam cycles
- Performs where FKM and many FFKM materials degrade
Is Simriz suitable for downhole tools and high-pressure drilling?
- Yes
- Strong RGD resistance
- Excellent performance under high-pressure cycling
- Suitable for harsh chemical and temperature exposure
How does Simriz reduce maintenance costs?
- Longer seal life
- Fewer changeouts
- Lower risk of seal failure
- More predictable maintenance scheduling
Is Simriz compatible with high-purity analyzer or lab systems?
- Yes
- Low extractables
- Stable in solvent-based analytical systems
- Maintains tight dimensional control
How does Simriz benefit OEM designs?
- Increases equipment reliability
- Reduces warranty claims
- Provides premium sealing option for critical components
Is Simriz 134 suitable for extreme-temperature valve service?
- Yes
- Handles continuous temperatures up to +230°C
- Maintains sealing force and dimensional stability
How does Simriz compare to Kalrez®?
- Similar or superior RGD resistance
- Strong steam/hot-water performance
- Excellent chemical resistance
- Often more cost-effective with better availability
Can Simriz be used as a general-purpose high-end material?
- Yes
- Broad chemical compatibility
- Works across multiple demanding applications
- Ideal for standardization in high-value environments
Does Simriz resist extrusion in high-pressure reactors?
- Yes
- 90A hardness improves extrusion resistance
- Stable under high mechanical loads
Is Simriz good for paint, coating, or solvent flush systems?
- Yes
- Maintains integrity in harsh solvent blends
- Prevents swelling and deformation
Can The O-Ring Store deliver Simriz quickly?
- Yes
- We stock Simriz for fast order fulfillment
- Avoid long lead times associated with many FFKM products
Does Simriz 134 come with traceability and documentation?
- Yes
- ISO9001:2015 quality records available
- Traceable materials and certification upon request
Why are my current seals flattening at high temperature?
- Likely compression set from thermal exposure
- Simriz® 134 has excellent thermal stability and resists permanent deformation
Do I need FFKM for my application?
Choose Simriz® 134 if you have:
- Harsh chemicals or aggressive solvents
- High temperature operation
- Pressure cycling or decompression
- Steam, CIP, or SIP processes
- High downtime cost or mission-critical equipment
Need Assistance?
Our technical team can help identify the best material for your application.
sales@theoringstore.com
208-413-6377