China Back-up Rings Manufacturers Suppliers Factory

Your Professional Back-Up Rings Supplier

Zhejiang Kintowe Sealing Technology Co., Ltd was founded in 1986, we have been specializing in the design, development, production and marketing of guide components and sealing system products for more than 36 years. Our core product offerings primarily include hydraulic seals, bearings and washers, and phenolic cotton tubes.

Why Choose us

Quality Control:Our production strictly complies with the GB/T 19001-2008/ISO 9001:2000 quality management system standards. We employ advanced quality management methods and have established a comprehensive modern quality control system.

Well-Experienced:We possess extensive experience in OEM projects.

Advanced Production Equipment:We own and operate more than 200 sets of professional-grade production equipment, ensuring high efficiency and precision in manufacturing.

Parameter

ID	OD	Thickness	ID	OD	Thickness	ID	OD	Thickness
8	18	2	63	73	3	204	224	4
10	20	2	64	80	3	205	220	4
14	24	2	65	75	3	210	230	4
15	28	2	67	77	3	220	240	4
16	26	2	70	80	3	225	245	4
18	26	2	70	90	3	225	250	4
18	31	2	71	80	3	230	250	4
20	28	2	71	81	3	240	260	4
20	30	2	75	95	3	250	270	4
20	33	2	80	90	3	250	275	4
22	35	2	80	100	3	255	280	4
23.5	31.5	2	85	100	3	260	285	4
25	35	2	85	105	3	265	290	4
25	38	2	90	105	3	265	297	4
27	40	2	90	110	3	270	295	4
28	35.5	2	95	110	3	270	300	4
28	40	3	95	115	3	275	300	4
28	41	3	98	112	3	280	305	4
30	40	3	100	115	3	280	312	4
30	43	3	100	120	3	290	315	4
31.5	41.5	3	105	125	3	300	325	4
31.5	44.5	3	106	120	3	300	332	4
34	50	3	112	125	3	175	190	4
35	45	3	112	132	3	175	200	4
35.5	45	3	120	140	3	180	200	4
40	51.5	3	125	140	3	180	205	4
40	50	3	125	150	3	190	200	4
45	56	3	135	160	3	190	210	4
45	55	3	136	150	3	200	220	4
45	56	3	140	165	3
47	61	3	145	160	3
47	63	3	145	170	3
50	60	3	150	165	3
50	66	3	155	170	3
53	63	3	155	180	4
55	65	3	160	175	4
55	71	3	160	185	4
56	66	3	165	180	4
60	70	3	170	180	4
60	71	3	170	200	4
60	76	3	200	225	4

Benefits of Back-Up Rings

Extrusion Prevention

Back-up rings support the seal and prevent it from extruding into the gap between the mating hardware parts, which can occur under high pressure. Extrusion can lead to seal failure, so back-up rings are crucial in maintaining seal integrity.

Pressure Enhancement

By preventing extrusion, back-up rings allow seals to withstand higher pressures than they could on their own, extending the operating pressure range of the seal.

Improved Seal Life

The use of back-up rings can significantly increase the lifespan of seals by reducing wear and tear. This is because they minimize the deformation and damage that seals might otherwise experience under pressure.

Material of Back-Up Rings

Polyurethane

Back-up rings made from polyurethane offer excellent resistance to wear, abrasion and high pressures. They are also known for their high load-bearing capacity and low compression set, which makes them ideal for use in heavy-duty applications.

Nitrile rubber

Nitrile rubber back-up rings offer excellent resistance to oil, grease and other hydrocarbons. They are also highly durable and resistant to abrasion, making them suitable for use in demanding applications.

Silicone

Silicone back-up rings are ideal for use in high-temperature applications, as they can withstand temperatures of up to 200°C. They are also highly resistant to ozone and UV light, which makes them suitable for use in outdoor environments.

Fluorocarbon

Back-up rings made from fluorocarbon are highly resistant to heat, chemicals, and oils, making them ideal for use in high-temperature and high-pressure applications.

Application of Back-Up Rings

01.

High-Pressure Hydraulic Systems

In high-pressure hydraulic systems, back-up rings provide essential support to prevent O-ring extrusion, ensuring consistent and reliable sealing performance.

02.

Aerospace Applications

The demanding conditions of aerospace environments, including extreme temperatures and pressures, necessitate the use of back-up rings to maintain seal integrity and prevent catastrophic failures.

03.

Oil and Gas Industry

Equipment used in oil and gas exploration and production often encounters high pressures and aggressive chemicals. Back-up rings enhance the durability of seals, protecting against extrusion and chemical degradation.

04.

Automotive Engines and Transmissions

In automotive applications, back-up rings support O-rings in high-pressure and high-temperature areas, such as engine and transmission systems, ensuring reliable operation and longevity.

Mode Of Transportation

By Express (FedEx, UPS, DHL, TNT, EMS, etc. )

Advantage: Fast (takes about 7 - 10 days in the delivery), door to door

This is especially useful for urgent shipments that need to reach their destination quickly. Though express delivery is a little expensive, it is worth the cost if time is a crucial factor.

By Air Transportation

Advantage: Fast (takes about 8 - 12 days), a little cheaper than Express.

Though it takes a little longer than express delivery, at around 8-12 days, it is still relatively quick. Additionally, air transportation is a little cheaper than express delivery. The only downside is that the receiver has to collect the goods from the airport.

By Sea (Ocean ) Transportation

Advantage: Much cheaper than Express or Air transportation.

Sea transportation is an excellent option for individuals and businesses that need to transport goods across long distances. With its cost savings and global coverage, it's an attractive alternative to other transportation methods.

FAQ

Q: How does a backup ring work?

A: They are typically used in conjunction with O-rings, where they prevent extrusion - the phenomenon where a seal deforms under high pressure and moves into the clearance gap, leading to seal damage and system failure. The backup ring adds support and durability, ensuring the seal remains in its intended shape and place.

Q: What are the two main types of retaining rings?

A: There are two main types of snap and retaining rings—internal retaining rings, which are assembled inside a cylinder where the ring fits inside a hole (or bore), and external retaining rings, which are assembled on the outside of the shaft.

Q: How to select a retaining ring?

A: Free diameter – For internal retaining rings, this is the outer diameter and for external retaining rings, it is the inner diameter.
Ring thickness.
Groove size, including the diameter, width, and depth of the groove.

We're professional back-up rings manufacturers and suppliers in China, specialized in providing high quality customized service and OEM service. If you're going to buy cheap back-up rings made in China, welcome to get free sample from our factory. For price consultation, contact us.

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Parameter

Application of Back-Up Rings

FAQ