Precision CNC Machined PTFE Back-Up Rings for High Pressure Sealing Applications

Product Summary

Our PTFE back-up rings (anti-extrusion rings) are CNC machined from virgin or glass-filled PTFE to protect O-rings and elastomeric seals from extrusion damage under high pressure. They function as support rings, ensuring seal integrity and longevity. Suitable for demanding industries such as chemical, petrochemical, food & pharmaceutical, automotive, electronics, aerospace, and general machinery.

Key Selling Points

• High-Precision CNC Machining: Achieves tight tolerances for reliable fit and performance.
• Pure PTFE Material: No contamination, FDA compliant for food and pharmaceutical contact.
• Fast Delivery: Orders shipped within 2 days for standard dimensions (verified case).
• Small Order Accepted: MOQ flexible – we accommodate low-volume prototypes and pilot runs.
• Custom Options: Choose with/without glass fiber, custom color, surface roughness, and visual inspection criteria.

Technical Specifications

Models and Options

Available as PTFE back-up rings (anti-extrusion rings) in various sizes and cross-sections. Custom shapes and dimensions can be machined per drawing. Also available in other plastics: POM, PP, PEEK, etc.

Materials and Structure

Made from PTFE (polytetrafluoroethylene) – a high-performance engineering plastic with excellent chemical resistance, low friction, and wide temperature range. Options include glass fiber reinforcement for increased mechanical strength. Structure designed to fit around O-rings in groove applications.

Applications

• Chemical & Petrochemical Industry – seals in pumps, valves, compressors
• Food & Pharmaceutical – FDA compliant for processing equipment
• Automotive OEM – hydraulic systems, transmissions
• Electronics & Semiconductor – precision sealing in vacuum chambers
• Aerospace & Defense – high-pressure hydraulic actuators
• General Industry – all machinery requiring anti-extrusion protection

Customization

We offer full customization: dimensions, geometry, material grade (virgin/glass-filled), color, surface finish, packaging. Contact us with your drawing or specifications.

Case Study

Client: Chemical & Petrochemical industry (UK)
Application: PTFE back-up ring for high pressure seal
Quantity: 20 pcs
Requirements: CNC machined, high-precision tolerance, pure PTFE, small order
Result: Delivered in 2 days, protect O-rings from extrusion damage, improved seal life.
Highlight: 2-day turnaround, small order accepted, no contamination.

Frequently Asked Questions

1. What is the minimum order quantity?

Our MOQ is flexible; we accept small quantities for testing and prototypes.

2. What payment methods do you accept?

We accept T/T (deposit + balance), L/C at sight, D/P for certain destinations, and PayPal for sample/low-value orders.

3. Can you provide FDA compliant PTFE?

Yes, we offer FDA-grade PTFE for food and pharmaceutical applications.

4. How long does production take?

Standard items ship within 2 days. Custom orders 5-10 days depending on complexity.

5. Do you offer pre-shipment inspection?

Yes, we perform dimensional inspection and visual check per your criteria.

6. What certifications do you have?

Our parts can be certified to FDA, RoHS, UL as per requirement.

7. Can you machine other plastics like PEEK or POM?

Yes, we also offer CNC machining of PEEK, POM, PP, PE, UHMWPE, ABS, PA6, PA66, and more.

8. How do I request a custom quote?

Send your drawing or requirements to sales@lingorp.com. We reply within 24 hours.

Inquiry Information

Contact Colin Lin at sales@lingorp.com / Tel: +86 18358136245 / WhatsApp: +86 18358136245. Address: Rm1303 Meiya Plaza, LP, HZ, China 311100.