Premium PTFE Backup Sealing Rings for Durable Applications

Product Description

Factory price Customized  SIZE 
FKM NBR RUBBER MOQ1 PIECE Delivery time fastest 24h

Product Description

 Back-up rings are the most common anti-extrusion devices in dynamic sealing. They provide simple solutions to safely increase system function by positioning a more robust material adjacent to the extrusion gap, taking the seal's place and providing a barrier against high pressures. Back UPS can be used to offset the reduced pressure rating effects of wear rings or to improve seal against pressure spikes, or to ensure seal performance at higher tempertures.

Backup rings serve as complementary components to O-rings in sealing systems. They effectively 
prevent O-ring extrusion, compression buckling, and nibbling damage, thereby significantly extending the service life of the O-ring. Additionally, backup rings enhance the O-ring's pressure-bearing capacity and improve its tolerance for radial clearance.

PTFE is the most suitable material for the seal.  PTFE is a semicrystalline thermoplastic material with exceptional chemical resistance and thermal stability. It exhibits the strongest corrosion resistance among all plastics, making it suitable for nearly all sealing applications.
However, PTFE has slightly limited resistance to liquid alkali metals, elemental fluorine, and certain halogenated compounds.
PTFE ideal for backup rings, V-rings. o-rings, rotary seals.and gaskets. FDA grades are available forfood and medical applications.
Secondly,PTFE has a low friction coefficient, which makes it predestined for use in dynamic applications. 

FUNCTION

Excellent corrosion resistance

Extremely low friction coefficient

Good high temperature resistance

Self-lubrication

Good sealing proformance

Application:
Suitable for dynamic, static, reciprocating, and rotational motion. Applicable to low to medium loads.

Installation Guidelines:

The use of backup rings can increase the working pressure and radial clearance tolerance of the O-ring seal.

For single-direction pressure applications: Install one backup ring on the low-pressure side of the O-ring.

For alternating or bidirectional pressure: Two backup rings are required - one on each side of the O-ring.

 

Product Parameters

Customized  SIZE                        MOQ:1piece
Delivery:The fastest delivery can be made within 24 hours

Thank you for your interest in our products. For more product information and to enhance your purchasing experience, We are committed to providing our customers with high-quality products and excellent service. If you have any questions or need assistance with selecting the right seals for your application, please contact our customer support team. 

If your machine is unique, the seal should be created specifically for it. Seal creates product based on your requirements. You tell us what material and dimensions you need, and our professionals use modern machinery to create the exactseal for your needs.

The Detailed Index of  PTFE
Material		Color	Hardness	Work Temperature	Density	Elongation at break	Tensile StrengthTest
/		/	Shore D	ºC	g/cm³	%	N/mm²
Standard		/	DIN53505	/	EN ISO 1183	DIN53504/53455
Pure  Tetrafluoroethylene	PTFE	White	57	-200~260	2.17	300	27
PTFE +15%Glass Fiber+5%Molybdenum Disulfide	PTFE-2	Gray	60		2.25	200	18
PTFE+40%Bronze	PTFE-3	Bronze	64		3	280	22
PTFE+25%Carbon Fiber	PTFE-4	Black	65		2.1	150	15

The Detailed Index of  PU Material
Material		Color	Hardness	Work Temperature	Density	Elongation at break	Elastic Modulus	Wear & Tear
/		/	Shore A	ºC	g/cm³	%	N/mm³	mm³
Standard		/	DIN53505	/	EN ISO 1183	DIN53504/53455	DIN53504	DIN ISO4649
Polyurethane	PU	Green	A95±2	-30~110	1.2	≥450	12	18
High temperature hydrolyzable polyurethane	HPU	Red	A95±2	-20~110	1.2	≥330	≥13	17
Cast polyurethane	G-PU	Red	A95±2	-30~110	1.2	≥280	≥11	25
Low temperature resistant polyurethane	T-PU	Blue	A95±2	-50~110	1.17	≥450	≥12	15
Self-lubricating polyurethane	S-PU	Gray-Black	A95±2	-20~110	1.23	400	17	21
Ultra-high hardness polyurethane	X-PU	Dark Green	A97±2	-30~110	1.21	400	21	18
Ultra-high hardness High temperature hydrolyzable polyurethane	XH-PU	Dark Red	A97±2	-20~110	1.22	350	25	20
Ultra-high hardness  Self-lubricating polyurethane	XS-PU	Gray-Black	A97±2	-20~110	1.25	350	25	29

The Detailed Index of Rubber  Material
Material		Color	Hardness	Work Temperature	Density	Elongation at break	Elastic Modulus	Wear & Tear
/		/	Shore A	ºC	g/cm³	%	N/mm³	mm³
Standard		/	DIN53505	/	EN ISO 1183	DIN53504/53455	DIN53504	DIN ISO4649
Nitrile Rubber	NBR	Black	A85±5	-30~100	1.31	130	11	90
Hydrogenated Nitrile Rubber	HNBR	Black	A85±5	-25~150	1.22	180	10	90
Fluororubber	FKM/FPM	Black /Brown	A85±5	-20~200	2.3	200	5	150
Silicone Rubber	MVQ/SIL	Red/Black/Brown	A85±5	-60~200	1.52	130	5	-
Ethylene-Propylene-Diene Monomer	EPDM	Black	A85±5	-50~150	1.22	110	9	120

Our Advantages

High Quality

 

High-Quality Raw Materials. Our raw materials are sourced from top-tier suppliers in China, ensuring reliable quality that meets customers' usage requirements.Our PU made from MDI material featuring high strength, high toughness, and excellent chemical resistance.

Widely Used as Alternatives to International Brands. Our products serve as alternatives to globally renowned sealing brands such as Parker and Freudenberg .

Precision Turning Process. Utilizing turning manufacturing techniques, our products deliver high precision, low surface roughness, and superior sealing effectiveness.
Professionally certified through inspection procedures with SGS, ISO, and TÜV certifications.

 

Affordable prices,Cost-Effective

 

Raw Material Bulk Purchasing. Our large-scale and stable procurement volume provides better pricing for raw materials.

Rich Processing Experience. With 20 years of expertise focused on machined seal production, we achieve a high qualification rate and efficient material utilization, thereby enhancing cost-effectiveness.

Company Profile

Qingdao keluoke Sealing Technology Co. Ltd.

We are a leading innovator in precision sealing technology. Using advanced mold-free turning machines and top-grade imported materials, we deliver high-quality seals in any size (0-4000mm), shape, or material offer a full range of seals, including cylinder/valve/pump seals made from various polyer materials.Additionally, we provide expert services in design, prototyping, productiontesting, and installation.
With years of expertise and market experience, we consistently provide mid-to-high-end sealing solutions-delivering both standard and custom seals with industry-leading speed, specialize in large-diameter sealing rings (up to4000mm) with proven manufacturing excellence. As your trusted global partner.we focus on building long-term, stable collaborations.
Quality & Service: Our Core Promise
Your needs drive our innovation. We sincerely appreciate your trust and lookforward to building a successful future together

Packaging & Shipping

Cargo transportation methods	Air Freight
	Adjustable to customer requirements
Packing Methods	Carton
	Adjustable to customer requirements
Express	DHL/Fedex or other ways you need
Delivery Time	Normally  two weeks , if you need it urgently ,  24hours may be available (Depending on our raw material stock )

FAQ

Q:Why should you buy from us instead of other suppliers?
A:High Quality and Affordable prices,cost effective.

 

Q: What's the delivery time for orders?
A: Normally two weeks , if you need it urgently,24hours may be available(Depending on our raw material stock )

 

Q: What payment methods do you support?
A: We support T/T, Western Union, PayPal, cash, etc. The details can be negotiated.

 

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

 

Q: Can I request a customized size?
A: Absolutely! We offer tailored attachments.We offer a comprehensive selection of products in various models and materials. For detailed specifications

or tailored recommendations, please contact our technical team 

 

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

 

Q: How do I choose a raw compound for my application?
A:With years of experience in using a variety of materials, we can help you choose the material that best suits your needs.

 

Q: Are you a factory or a trader?
A: We are a manufacturer integrating industry and trade. Welcome to visit our company.

 

Q: Can I add my LOGO to the product?
A: We support on-demand customization, including LOGO customization, color customization, appearance size customization, etc.

 

 

If you have more questions,please contact us