Static Oring Seal High Quality Full Size NBR HNBR Edpm PTFE Silicone Rubber Oring

• Customization: Available
• Material: NBR, HNBR, EPDM, FKM, Sir
• Application: Pumps
• Type: Oil Seal
• Performance: High Pressure
• Shape: O-Ring
• Standard: Standard, Nonstandard
• Density: 1.0-2.0g/cm3
• Tolerance: DIN ISO 3302-1, Rma, GB/T3672
• Working Temperature: -40~+350 Degree
• Hardness: 20 ~90 Shore a
• Transport Package: Plastic Bag & Carton Box
• Specification: 400x300x300mm
• Trademark: Customization
• Origin: Shenzhen China
• HS Code: 4016999090
• Production Capacity: 1000000PCS/Year

Product Description

high-quality static O-ring seals, material choice is critical to ensure longevity, leak-proof performance, and resistance to environmental factors. Below is a detailed comparison of NBR, HNBR, EPDM, PTFE, and Silicone (VMQ) rubber O-rings for static sealing applications, including their properties, advantages, and ideal use cases.
 

1. Material Comparison for Static O-Ring Seals

Material	Temp. Range	Key Properties	Best For	Not Recommended For
NBR (Nitrile Rubber)	-30°C to +120°C	Excellent oil/fuel resistance, cost-effective	Hydraulic systems, fuel handling, automotive	High temps, ozone/UV exposure
HNBR (Hydrogenated Nitrile)	-40°C to +150°C	Superior heat/oil resistance, longer lifespan	High-pressure oil & gas, engine seals	Polar solvents, strong acids
EPDM (Ethylene Propylene Diene)	-50°C to +150°C	Great water/steam resistance, ozone/UV stable	Cooling systems, outdoor seals, HVAC	Petroleum oils, fuels
PTFE (Teflon)	-100°C to +260°C	Extreme chemical/heat resistance, low friction	Aggressive chemicals, high-purity apps	Dynamic seals (brittle)
Silicone (VMQ)	-60°C to +230°C	Flexible at low temps, FDA-approved, UV resistant	Medical, food-grade, high-temp gaskets	Oil/fuel exposure

2. Key Considerations for Static Seals

Compression Set Resistance

• Critical for long-term sealing (prevents deformation).

• Best: HNBR, PTFE | Worst: Standard NBR.

Chemical Compatibility

• Check fluid exposure (e.g., oils, acids, steam).

• PTFE = Best for harsh chemicals.

Temperature Stability

• Short-term peaks: Silicone (300°C), PTFE (260°C).

• Cryogenic apps: PTFE or Silicone.

FDA/Medical Compliance

• Silicone & PTFE are preferred for food/medical use.
   

  3. Manufacturing & Quality Standards

• Tolerances: ISO 3601 (Class A for precision).

• Surface Finish: Smooth to prevent extrusion.

• Testing:

  • Compression Set (ASTM D395)

  • Leakage/Pressure Testing

  • Chemical Immersion Tests

•  

  4. Popular Applications

• NBR: Hydraulic fittings, fuel systems.

• HNBR: Oilfield equipment, automotive seals.

• EPDM: Water pumps, radiator seals.

• PTFE: Chemical processing, semiconductor tools.
  
  5. How to Select the Right Material?

• Provide these details for optimal selection:
   Fluid Type (e.g., oil, water, acid)
   Temperature Range (min/max)
   Pressure/Static vs. Dynamic
   Certifications Needed (FDA, UL, etc.)

   

  6. Ordering Custom Static O-Rings

• Sizes: AS568, ISO, or custom dimensions.

• Colors: Black (standard), red (silicone), or custom.

• Hardness: 50-90 Shore A (softer for better sealing).

•  

• Silicone: Medical devices, bakeware gaskets.

Brand Name	customized brand
Product Name	O ring
Material	silicone FKM NBR
Property	Low temperature resistance,heat resistance, oxygen resistance etc
Color	colored
Hardness	30-90 Shore A or special
MOQ	1000PCS
Samples	Free samples are available when we have inventory.
Package	Inner: plastic bag, outer: carton box or as your requirements
Payment	L/C,T/T,Paypal,D/A,D/P,Western Union
Certificate	TS16949,ISO9001,ROHS,REACH
Delivery time	Usually 20 days after receiving your advance payment.
Application	Automobiles,Toy, Medical appliance,Electronic field, Industrial machine & equipment, cylindrical surface static sealing,flat face static sealing, vacuum flange sealing, triangle groove application, pneumatic dynamic sealing ,Medical equipment industry, heavy machinery, excavators, etc.

 

FAQ

Q: Are you trading company or manufacturer ?
A: We are manufacturer.
Q: How long is your delivery time?
A: Generally 3-7 days for standard sealing products; and 15-30 days for big order and custom non-standard products.
Q: Do you provide free samples? 
A: Yes, we offer free sample while customer need pay for the freight charge.
Q: Which Payment way is workable?
A: Irrevocable L/C, Cash, PayPal, Credit card and T/T money transfers.
B: 30% T/T deposit in advance, 70% balance before shipment after presentation of ready cargo.
C: L/C ( Irrevocable LC at sight: Order amount over USD100,000)
Q: What is your standard packing?
A: All the goods will be packed by carton box and loaded with pallets. Special packing method can be accepted when needed.
Q: How to select the raw compound for my application?
A: With years of experience working with a variety of material, we can help select the material that will best suit your needs while keeping material costs in mind.
Q: Do you use any international standards for the rubber products?
A: Yes, we mainly use ASTM D2000 standard to define the quality of the rubber materials, tolerances as per ISO3302, ISO2768, etc.
Q: Can you supply different color materials?
A: Yes, we can produce custom molded rubber and silicone rubber products in different colors, the color code will be required in case of an order.
Q: What materials are available to produce from your side?
A: NBR, EPDM, SILICONE, FKM, NEOPRENE(CR), NR, IIR, SBR, ACM, AEM, Fluorosilicone(FVMQ), FFKM, Liquid Silicone, Sponge, etc.