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1,122Here is the revised page. I fetched the About Us page to check the company details. The certificates are image-only so that I couldn't read the names of the FDA, USP Class VI, or ISO certificates. I left placeholders for them rather than repeating the claims from the draft. Custom PTFE machining parts and rings DSP Sealing machines PTFE parts and rings to your drawings. We also work in modified PTFE, PEEK, PA6G, POMC, and ABS. Our Hebei plant has 48 CNC machines and compressio
Here is the revised page. I fetched the About Us page to check the company details. The certificates are image-only so that I couldn't read the names of the FDA, USP Class VI, or ISO certificates. I left placeholders for them rather than repeating the claims from the draft.
DSP Sealing machines PTFE parts and rings to your drawings. We also work in modified PTFE, PEEK, PA6G, POMC, and ABS. Our Hebei plant has 48 CNC machines and compression molding equipment, and we keep more than 1,000 mold sizes in stock.
A seal or fitting fails when its material cannot handle the chemicals, temperatures, or pressures it sees in service. PTFE resists most acids, alkalis, and industrial solvents, and it works across a wide temperature range. That is why it is common in valves, pumps, and reactors.
Chemical resistance: PTFE resists most industrial chemicals. If your fluid is unusual, send us the details before ordering.
Temperature range: Standard grades are rated from -200°C to +200°C.
Low friction: PTFE is slippery, reducing galling and making parts easier to remove during maintenance. Unfilled PTFE wears faster in sliding contact, so moving parts usually need a filled grade. Please tell us the duty, and we will suggest one.
Custom dimensions: We machine parts to your drawing dimensions. Send drawings with tolerances marked.
Ring types
| Ring type | Typical use | Notes |
|---|---|---|
| PTFE O-rings | Static and dynamic seals in pumps, valves, and reactors | PTFE has little elasticity, so dynamic service often uses a spring energizer. |
| PTFE backup rings | Keep an elastomer O-ring from extruding under high pressure | Sit on the low-pressure side of the O-ring. |
| PTFE flat rings | Gasket-style seals for flanges and covers | Suited to static sealing surfaces. |
| PTFE lantern rings | Stuffing boxes and pump shafts | Slotted or hollow design lets fluid circulate. |
| PTFE discs | Isolation seals, sight glasses, lab equipment | Thickness made to order. |
Send us your drawing or sample, the quantity, and the material grade. We will reply with a quote.
How is a PTFE ring different from a rubber seal?
PTFE resists more chemicals and handles a wider temperature range than most rubbers, and it doesn't swell in solvents. It is also stiffer than rubber, so it recovers less after compression and can creep under sustained load. For that reason, it often needs a spring energizer or elastomer backing.
Can PTFE O-rings work in pumps and valves?
Yes, in both static and dynamic service. Dynamic service usually calls for an energizer. Unfilled PTFE wears faster than filled grades against moving surfaces, so specify a filled grade for shafts and valve stems.
When do I need a backup ring?
When system pressure is high enough to push the elastomer O-ring into the clearance gap. A PTFE backup ring placed on the low-pressure side blocks that extrusion.
