As568 Standard Inch Serious NBR70 O-Ring Kit Assortment 382 Pieces China Manufacturer

• The below two kinds o ring kit are also commonly used : (if you need other sizes ,we can make customized kits)

  BOX-G AS568 SIZES O-RING KIT
  O-RING KIT AS568 STANDARD					PROFESSIONAL QUALITY
  Nitrile rubber (NBR)					382 Pcs
  Part NO.	Actual Size		Quantity		Part NO.	Actual Size		Quantity
  AS 568	ID/mm	CS/mm	InKit		AS 568	ID/mm	CS/mm	InKit
  A 006	2.90	1.78	20		A 211	20.22	3.53	10
  A 007	3.68	1.78	20		A 212	21.82	3.53	10
  A 008	4.47	1.78	20		A 213	23.39	3.53	10
  A 009	5.28	1.78	20		A 214	24.99	3.53	10
  A 010	6.07	1.78	20		A 215	26.57	3.53	10
  A 011	7.65	1.78	20		A 216	28.17	3.53	10
  A 012	9.25	1.78	20		A 217	29.74	3.53	10
  A 110	9.19	2.62	13		A 218	31.34	3.53	10
  A 111	10.77	2.62	13		A 219	32.92	3.53	10
  A 112	12.37	2.62	13		A 220	34.52	3.53	10
  A 113	13.94	2.62	13		A 221	36.09	3.53	10
  A 114	15.54	2.62	13		A 222	37.69	3.53	10
  A 115	17.12	2.62	13		A 325	37.47	5.33	7
  A 116	18.72	2.62	13		A 326	40.64	5.33	7
  A 210	18.64	3.53	10		A 327	43.82	5.33	7
  Total Quantity: 382 Pcs

• BOX-H METRIC SIZES O-RING KIT
  O-RING KIT METRIC SIZE					PROFESSIONAL QUALITY
  Nitrile rubber (NBR)					404 Pcs
  Part NO.	Actual Size		Quantity		Part NO.	Actual Size		Quantity
  ON Kit	ID/mm	CS/mm	InKit		ON Kit	ID/mm	CS/mm	InKit
  R_01	3.00	2.00	18		R_16	20.00	3.00	12
  R_02	4.00	2.00	18		R_17	22.00	3.00	12
  R_03	5.00	2.00	18		R_18	24.00	3.00	12
  R_04	6.00	2.00	18		R_19	25.00	3.00	12
  R_05	7.00	2.00	17		R_20	27.00	3.00	12
  R_06	8.00	2.00	17		R_21	28.00	3.00	12
  R_07	10.00	2.00	17		R_22	30.00	3.00	12
  R_08	10.00	2.50	14		R_23	32.00	3.00	12
  R_09	11.00	2.50	14		R_24	33.00	3.00	12
  R_10	12.00	2.50	14		R_25	35.00	3.00	12
  R_11	14.00	2.50	14		R_26	36.00	3.00	12
  R_12	16.00	2.50	14		R_27	38.00	3.00	12
  R_13	17.00	2.50	14		R_28	38.00	4.00	9
  R_14	19.00	2.50	14		R_29	42.00	4.00	9
  R_15	19.00	3.00	12		R_30	45.00	4.00	9
  Total Quantity: 404 Pcs

• O-RING KIT NBR90 397PCS
  P3	2.8*1.9	18	P22	21.8*2.4	14
  P4	3.8*1.9	18	P22.4	22.1*3.5	10
  P5	4.8*1.9	18	G25	24.4*3.1	11
  P6	5.8*1.9	18	P25	24.7*3.5	10
  P7	6.8*1.9	18	P26	25.7*3.5	10
  P8	7.8*1.9	18	G30	29.4*3.1	11
  P9	8.8*1.9	18	P30	29.7*3.5	10
  P10A	9.8*2.4	14	P32	31.7*3.5	10
  P11	10.8*2.4	14	P34	33.7*3.5	10
  P12	11.8*2.4	14	G35	34.4*3.1	11
  P14	13.8*2.4	14	P36	35.7*3.5	10
  P16	15.8*2.4	14	G40	39.4*3.1	11
  P18	17.8*2.4	14	P40	39.7*3.5	10
  P20	19.8*2.4	14	G45	44.4*3.1	11
  P21	20.8*2.4	14	P48	47.7*3.5	10

Why Buna (Nitrile) O-Rings?

Buna, scientifically referred to as Nitrile Butadiene Rubber (NBR), is a synthetic rubber copolymer of butadiene and acrylonitrile.

Buna-based o-rings, Backup Rings, X-Rings, and Square Rings have earned their place as the preferred choice in numerous

applications due to their unique balance between flexibility, resistance, durability, and affordability.

This balance positions Buna o-rings as a stand-out choice for various demanding industrial applications. As a leading provider,

RUICHEN O-Ring and Seal understands the crucial role of these components and is committed to offering superior quality

Buna-based products to cater to diverse industry needs.

Properties of Buna (Nitrile) O-Rings

While o-rings might seem simple, they are a product of advanced material science and precise manufacturing techniques.

Buna o-rings, known as Nitrile o-rings, are made from synthetic rubber – Nitrile Butadiene Rubber (NBR). The term “Buna”

is derived from Bu (Butadiene) and Na (Sodium – the polymerization agent).Buna o-rings’ unique properties result from their

chemical composition, specifically the co-polymerization of butadiene and acrylonitrile. By altering the proportions of these two

components, manufacturers gain control over specific properties. For instance, a higher acrylonitrile content will increase resistance

to petroleum-based oils and fuels, while a lower range improves low-temperature performance.

Various industries celebrate Buna o-rings because of their excellent resistance to oils, fuels, silicone greases, hydraulic fluids,

and certain alcohols. These rings also resist damage from compression set, tearing, and abrasion, promising an extended and

efficient service life compared to many other materials. This robust performance profile renders Buna highly versatile and suitable

for various applications where durability, flexibility, and resistance are paramount. Check out our interactive chemical compatibility

tool to check if Buna is resistant to a specific chemical.

Among Buna’s standout attributes is its impressive tensile strength, which generally falls between 1000 to 3000 PSI. Furthermore,

Buna exhibits an elongation percentage of 200 to 400. This flexibility enables Buna o-rings to maintain a solid seal while offering

enough elasticity to install them in various configurations. You can view the specification sheet for a Buna product purchased through

RUICHEN O-Ring by visiting our compound page.

Aging is a common problem in many materials, leading to a decline in performance over time. However, Buna o-rings exhibit

excellent resistance to aging, thanks to the stability of their polymer structure. This property ensures they retain their functional

capabilities and physical properties even after extensive use, extending their service life.

Buna o-rings also possess good adhesion to metal surfaces. This property is crucial in applications where the o-ring needs to maintain

a tight seal against metal parts. The result is a more secure seal, helping to prevent leaks and ensure optimal performance.

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.

Our Factory

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

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

3. Two factories, more than 18000㎡,clean room 600㎡, 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.

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

Progress

Quality control

Material Inspection:Storage of all raw materials before the test, and issue a report on the corresponding

material properties, compared with raw material's own property report, two reports property values is

consistent, can put in storage.

Model Inspection:After the mold development or mold cleaning finished on the machine, we will test all

the specifications of the mold to ensure that each cavity of the product specifications and quality.

Production Inspection:The production process of the product inspection personnel timing semi-finished

product inspection, ensure the quality of the rationality of technology, defective rate control in a reasonable

range.

Quanlity Control:The quality inspection department will conduct a sampling inspection of each batch of

products

Production Full Inspection:The optical inspection machine can ensure the appearance and dimension

of the product are 100% qualified.

Cooperative partner

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

to serve for you

International exhibition

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.

Inquiry Guide

In order to you can get faster and more accurate service, please send an inquiry according to this

page Enquiries parameters: size, material, hardness, color, tolerance, working environment, purchase

quantity , etc.

1. Size:drawing or sample.

2. Material: Silicone, NBR, EPDM, VITON&FKM, NR, HNBR, SBR, Neoprene, PU,FFKM, etc

3. Hardness: 10 Shore A~90 Shore A

4. Color: according to your request, the most common color is black. The price of the white color

products is litter higher than others.

5. Tolerance: if there is special size requirements, please mention in enquiries. Otherwise, we will

be in accordance with the international standard tolerance execution.

6. Working environment: in order to produce more accurate production you need, please be sure to

inform products work environment. Such as motion situation(is sports or stationary, whether there

is friction), contact medium (exposure to corrosive gas, water vapor, acidic or alkaline liquid), etc.

7. Purchase quantity: please offer purchase quantity per month/year.

8. Customer information: in order to facilitate we understand more about your company, and contact

you timely, please provide your company's name, phone number, E-mail contacts.

DONGGUAN RUICHEN SEALING CO., LTD

SHANGRAO RUICHEN SEALING CO.,LTD

      Ruichen Sealing Co., Ltd was built in 2006, The company has two branches in Dongguan and Shangrao.They are Dongguan Ruichen Sealing  Co., Ltd. and Shangrao Ruichen Sealing Co., Ltd.. We mainly produce rubber o rings , gaskets , ball , grommet and customized rubber part. Shangrao Ruichen as production base , covering a total area of 18,000 square meters, with total assets of 100 million yuan, more than 300 employees and 46 sets of plate vulcanizer machines.

Ruichen focus on research and production of rubber seals. At present, we have more than 10,000 sets of molds for O-ring and other seal rings. O-ring sizes include American standard (AS568), Japanese standard (JIS) and GB series. The material meets the requirements of various environmental regulations (ROHS2.0 REACH224 FDA, PAHS, WRC, WARS, VOC, UL), etc. Products are widely used in automotive parts, connectors, electronic products, pumps and valves, pneumatic, power tools, medical instruments and other fields.

Ruichen use ISO9001, IATF16949, ERP, HRP systems to establish and improve the quality management, process management, labor cost control. Ruichen adhering to the "love management, fuhui sustainable (carry forward good moral character, create good quality)" concept, aim to seal industry deep cultivation for a hundred years, to be O-RING KING!