High Performance Rubber Washer Weather Resistant NBR/EPDM/FKM/Silicone/CR Rubber Parts for Pump Valve Plumbing Fittings

Product Description

 

Product Description

• Rubber gaskets are elastic components used for mechanically sealing the microscopic gap between two mating surfaces or joints.
  Rubber gaskets seal surfaces by flowing in and filling the surface irregularities of rigid parts.  The sealing effect is caused by the parts exerting compressive forces that plastically deform the gasket.
  There are several advantages offered by rubber gaskets.  These are low cost, excellent sealing properties, availability of different materials, chemical resistance, a wide range of physical properties, and so on.
  Its most popular applications are industrial and utility piping, automotive, aerospace, marine, containers, and food and drug processing equipment.

  

  
  1. Product Overview
  
  A Rubber Gasket is the unsung hero of mechanical integrity, providing a critical seal between two or more mating surfaces to prevent leakage of liquids, gases, and particulates. Our rubber gaskets are engineered from high-quality elastomeric compounds to deliver superior flexibility, compression recovery, and environmental resistance. Designed for both static and low-pressure dynamic applications, these gaskets effectively absorb vibration, compensate for flange irregularities, and withstand extreme operating conditions-ensuring your systems remain safe, efficient, and leak-free.
  
  2. Key Features & Benefits
  Excellent Sealing Performance: High elasticity and low compression set ensure a tight, durable seal that maintains its shape under constant pressure.
  
  Wide Material Selection: Available in various rubber types (NBR, EPDM, Silicone, Neoprene, etc.) to match specific chemical, thermal, and mechanical needs.
  
  Outstanding Weather & Aging Resistance: Options available for resistance to ozone, UV radiation, oxidation, and extreme weathering.
  
  Superior Damping & Absorption: Effectively reduces noise, vibration, and harshness (NVH) in mechanical assemblies.
  
  Versatile Configurations: Can be produced as flat sheets, strips, O-rings, or complex die-cut profiles to fit virtually any flange geometry.
  
  FDA & UL Compliant Options: Food-grade and flame-retardant materials are available upon request for specialized industries.

• 3. Material Options (Choose Your Compound)
•  

• Material Type	Key Properties	Typical Applications
  NBR (Nitrile)	Oil, fuel, and hydraulic fluid resistance; high abrasion resistance.	Automotive engines, fuel systems, hydraulics.
  EPDM	Superior weather, ozone, and steam resistance; excellent for outdoor use.	Roofing, HVAC, water piping, outdoor enclosures.
  Silicone (VMQ)	Extreme temperature range (-60°C to +230°C); food-grade and medical options.	Medical devices, food processing, electronics.
  Neoprene (CR)	Balanced oil, chemical, and weather resistance; good flame retardancy.	General industrial sealing, refrigeration, marine.
  FKM	High-temperature and aggressive chemical resistance.	Aerospace, chemical processing, oil & gas.

4. Technical Specifications (General Range)
 

Parameter	Typical Range
Hardness (Shore A)	40 - 90 (Customizable per application)
Tensile Strength	5 - 15+ MPa (Varies by material grade)
Temperature Range	-60°C to +230°C (depending on material selection)
Compression Set	Low to medium, optimized for long-term sealing force.
Thickness Tolerance	± 0.1 mm to ± 0.5 mm (Precision die-cut available)
Standards Compliance	Conforms to ASTM D2000, DIN, and ISO quality standards.

5. Diverse Applications

Our rubber gaskets are essential components in virtually every industry:

Plumbing & Piping: Flange seals, pipe connectors, water pump seals.

Automotive & Transportation: Door seals, hood insulators, engine gaskets.

HVAC & Refrigeration: Ducting seals, compressor gaskets, air handling units.

Food & Beverage: FDA-approved silicone seals for processing machinery.

Electronics: Waterproof seals for enclosures, junction boxes, and control panels.

Medical: Biocompatible seals for diagnostic equipment and drug delivery systems.
 

Different elastomers have different compatibility with various chemical elements and their characteristics. See the table below for more material knowledge to order the most cost-effective o-rings from us. 

Material	Hardness (Shore A)	Temperature (ºC)	Main Color	Advantage	Price Level	Shelf Life (Years)
NBR / Nitrile / Buna-N	60-90	-40 - 120	Black	Good oil resistance & low price	Low	5-10
HNBR / HSN	60-90	-40 - 150	Green	Suitable for the cooling industry	High	5-10
FKM / FPM	70-90	-20 - 200	Brown	High-temperature & chemical resistance	High	About 20
EPDM / EPR	50-90	-50 - 150	Black	Excellent weather & ageing resistance	Fair	5-10
VMQ / Silicone	40-80	-70 - 220	Red	High-temperature & FDA food grade	High	About 20
Neoprene / CR	50-90	-40 - 120	Black	Versatility Properties	Fair	5-10
FFKM	70-90	-10 -  320	Black	Excellent chemical & high-temperature	Highest	About 20
FVMQ / Fluorosilicone	40-80	-60 - 200	Blue	Wider operating temperature range	High	About 20
Aflas / FEPM	40-90	-2 - 230	Black	Good chemical compatibility	Higher	About 20
PU / polyurethane	60-90	-40 - 90	Natural	High strength and wear resistance	High	About 10

What's Each Rubber's Typical Features ?

 

NBR Rubber Features:

Nitrile rubber (NBR, Buna-N) provides excellent resistance to petroleum oils as well as mineral and vegetable oil. Nitrile rubber also offers strong resistance to heat aging - often a key advantage over natural rubber.

Nitrile rubber performs well in carburetor and fuel pump diaphragms, aircraft hoses, seals and gaskets as well as oil-lined tubing. Due to its versatility, nitrile is used in applications involving not only oil and fuel resistance, but those applications requiring resistance to heat, abrasion, water, and gas permeability.

FKM Rubber Features:

Vi-ton belongs to the Fluoroelastomers (FKM/FPM) group of rubber compounds. There are many grades and hardness variations to solve most applications with various formulations to meet specific requirements of temperature and chemical resistance. Typical uses include:excellent heat resistance,good mechanical properties,good compression set resistance,resistance to wide range of oils and fuels,resistance to solvents; especially all aliphatic, aromatic and halogenated hydrocarbons and acids.

EPDM Rubber Features:

EPDM rubber is a high density rubber primarily used for outdoor applications. It has dynamic and mechanical properties between natural rubber and synthetic rubber.

Do not use EPDM if continual contact with petroleum based products is required.

Not recommended for usage in food applications or those that are exposed to aromatic hydrocarbons.

HNBR Rubber Features:

Hydrogenated Nitrile Butadiene Rubber (HNBR), also known as Highly SaturatedNitrile (HSN), is special class of nitrile rubber (NBR) that has been hydrogenated to increase saturation of the butadiene segment of the carbon polymer backbone. Subsequent improvements to the material properties, over that of a nitrile rubber (NBR), include greater thermal stability, broader chemical resistance, and greater tensile strength.

HNBR is classified by ASTM as a DH-type polymer. This classification indicates 150ºC service temperature as well as less than 30% swell in IRM 903 oil. HNBR can be formulated to meet application temperatures ranging between -50°C and 165ºC.

SBR Rubber Features:

1.Main materials: Styrene-butadiene rubber (SBR), a general-purpose synthetic rubber,produced from a copolymer of styrene and butadiene. Exceeding all other synthetic rubbers in consumption, SBR is used in great quantities in automobile and truck tires, generally as an abrasion-resistant replacement for natural rubber (produced from polyisoprene).

2.Available place: They are widely used in automobile, electrical appliances, building vibration isolation and other industry. For example, air blower, water pump, instrument, measuring of ships and so on.

3.Main performance: SBR has similar chemical and physical properties to natural rubber, with generally better abrasion resistance,outstanding strength,good creep and stress relaxation resistance and low cost,etc. It is not recommended to use SBR in applications that involve ozone, strong acids, oils, greases, fats and most hydrocarbons.

Neoprene Rubber Features:

Neoprene Rubber, also known as neoprene polychloroprene, is an extremely versatile synthetic rubber with more than 75 years of proven performance.

In the automotive world, neoprene is used for many under-the-hood and underbody parts that require a reasonably priced, mid-performance polymer with a good all-around balance of performance properties.

Natural Rubber Features:

Natural rubber was originally derived from latex found in the sap of rubber trees. The purified form of natural rubber can also be produced synthetically. Natural rubber is an ideal polymer for dynamic or static engineering applications.

Caution: Natural rubber is not recommended for applications where the rubber part will be exposed to ozone, oils, or solvents.

PU/Polyurethane Rubber Features:

Polyurethane is an organic polymer. Polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. Polyurethane is a widely used compound due to its superior strength, tear and abrasion resistance. Polyurethane also provides excellent permeation resistance.

Features:

• Good hydraulic oil and gas resistance
• Resistant to pure aliphatic hydrocarbons
• Resistance to mineral and silicone oils and greases
• Resistant to water, oxygen, ozone and aging
• Excellent tear and abrasion resistance
• Available in multiple types and compounds to meet performance and cost requirements

Certifications

We have certificates :ISO 9001:2015 , ISO 14001:2015 ,ISO 45001:2018 , IATF 16949 , FDA, REACH, ROHS, SGS etc.

 

Company Profile

1. Since 2006, focus on rubber seals, especially for auto parts

2. Certificates: ISO9001, IATF16949, ISO14001, ISO45001,ISO 13485

3. Two factories, more than 18000M2,clean room 600M2, with 300 workers.

 

4. Molds > 10000 sets, especially o rings, about 5000 sets.

 

5.O-ring series covers American standard (AS568), Japanese standard (JIS), national

standard(GB), and produces a large number of customized non-standard parts.

 

6. Material: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR .The rubber materials

used meet the requirements of ROHS2.0 and REACH235.

 

7. Material Certificates: FDA, ROHS, REACH, UL157, CP65 WRC, EN549,EN45545.

 

8. Products are widely used in automotive parts, electronic connectors, valves, pneumatics,
power tools, new energy, medical equipment, electronic products and other fields.

 

9. company has introduced HRP, ERP and other systems since its inception.

 

10. The company's labor cost, raw material procurement, production process and

product quality were comprehensively and scientifically controlled.

 

Quality Control

Ruichen always meets our customers' requirements. To make sure we produce high-quality o-rings, our company implements the

following general standards:

1) Raw material incoming inspection standard ASTM D2000 & HG/T 2579-2008 & HG/T 2811-1996
2) Public o-ring dimensional tolerance GB/T 3452.1-2005
3) N-level specification for o-ring appearance quality inspection GB/T 3452.2-2007
4) Hardness measurement model Micro O-Ring Testing (Type M system)
5) Hardness using standard ASTM D2240 Rubber Standard Test Method (Shore A)
6) Sampling inspection specification GB/T2828.1-20

Cooperative Partner

Ruichen company have cooperated with many superior customers as below , we have complete system and excellent productivity

to serve for you

Our Advantages

Why RUICHEN?

Many big companies select RUICHEN for their rubber seals and customized rubber parts because we always

satisfy them in quality, price, delivery, service, etc. At the same time, we also attach great importance to the

small customers in niche markets.Whether your purchase quantity is big or small, you are our valuable partners.

High Quality
We continue to manufacture high-quality products for all customers and pursue 100% customer satisfaction,

which has become one of our core competencies.

Profession
We have rich experience in materials, products, and production and excellent international trade and language

communication skills.

Best Services
From quoting, sampling, production, and shipping to after-sales, our sales will provide you with the best service

so that you can rest assured completely.

10000+ Projects Delivered
Over 10K projects have been sent to our customers worldwide in recent years, and we have received countless

positive comments.

Low Price
Our customers can obtain maximum profits through the ISO management system and intelligent manufacturing

to reduce our costs continuously.

Massive Capacity
Our in-house facilities allow us to get your projects done fast. And thanks to our strong relationship with rapid

materials partners, our capacity is not limited.

Fast Delivery
Unlimited capacity, experienced engineers, and a flexible production system allow us to create your seals and

production parts in a short period.

1000+ Happy Customers
We aim to keep every customer happy with reliable quality, fast turnaround, and excellent services. We want all

our new customers to become long-term customers.

ORK Other Rubber seals

We can also produce Automotive Rubber Seals ,Connector Rubber Seals ,Power Tool Rubber seals ,Valve Rubber Seals ,Pipe Rubber Seals ,Semiconductor Rubber Seals ,Hydraulic Pneumatic Rubber Seals ,Pump Rubber Seals ,Oil and Gas Seals ,Food Grade Rubber Seals ,Medical Rubber Seals ,Chemical Equipment Rubber Seals ...etc.

FAQ

Q: 1 What kinds of materials can you provide?
A: NBR, EPDM, SILICONE,FKM(FKM),NEOPRENE(CR), HNBR ,NR, IIR, SBR, ACM, AEM,Fluorosilicone(FVMQ),

FFKM etc.
Q: 2 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: 3 How long can we get the quote?
A: If your information is complete, we will provide the quotation within 8 hours.
Q: 4 Can you provide samples? Is it free or extra?
A: Yes, we can provide samples for free. Freight can be negotiated.

 

Q: 5 What is the normal lead time for product orders?
A: If the stock generally takes 3-7 days, mold about 15-18 days, no mold about 25-30 days, depending on the product

situation.

 

Q: 6 How to check the quality of the bulk order?
A: We have incoming inspection, control the quality of raw materials, process inspection,to ensure the quality of the

production process, shipping 100% of the full inspection; automatic inspection machine full inspection, and according

to customer needs before the mass production of pre-production samples.

 

Q: 7 What is your standard packing?
A: Plastic bag for inner packing .carton box for outer packing also be packed according to customer's requirements.

 

Q: 8 What's the payment term?
A: We accept T/T 30% deposit and 70% balance , Paypal is also ok.