Manufacturers have two options when creating plastic parts and products: CNC plastic machining and ...
PTFE Insulators
DSP currently housed in a modern, 30,00 sq. ft., facility in Hebei, Northwest of Beifotai town , with over 10 years experience, DSP serve high quality precision Modified Teflon ® PTFE, machined PTFE, PEEK, PA6G, POMC, ABS plastics parts on time & at our lowest cost.
Our center own 48 CNC machines and compress mold machines, stocking over 1000 custom mold size.
DSP currently housed in a modern, 30,00 sq. ft., facility in Hebei,Northwest of Beifotai town ,With over 10 years experience.
We’ve relied on DSP for over 5 years for high-quality PTFE and machined parts. Their precision and on-time delivery are unmatched, making them a trusted partner in our projects.
DSP consistently provides top-notch PEEK and POMC parts. Their expertise and fast turnaround make them an essential part of our supply chain.
DSP’s quality and reliability in supplying custom plastic parts—on time and at competitive prices—make them our go-to supplier for critical components.
Sep-19-2025
Admin
Manufacturers have two options when creating plastic parts and products: CNC plastic machining and ...
Apr-21-2025
Admin
Hengshui Dongshu Precision Co., Ltd. (DSP Sealing) manufactures CNC-machined plastic sealing parts. We cut PTFE, PEEK and modified PTFE into seats, rings, gaskets, washers, bushings, bearings and linings, either in our standard sizes or to your drawing.
If you need a sealing components supplier that makes the parts itself and quotes factory prices, send us your drawing and quantity.
Most orders fall into a few part types. PTFE washers, discs, rings and gaskets are the most common, and you can see them in our PTFE range. PEEK bushings, bearings and rings are in the PEEK range. Valve seats are listed under valve seats. If your part is not listed, we can still make it from a drawing or a sample.
Every part is turned or milled on CNC machines, so diameter, thickness and color can change from one order to the next. We work to the tolerances on your drawing, and we check surface finish on every batch. Send a drawing or a sample part and we will quote from that.
Most enquiries come down to these three materials. Here is how they compare.
| Property | PTFE | PEEK | Modified PTFE |
|---|---|---|---|
| Operating temperature | -200 °C to +260 °C | -50 °C to 250 °C | Depends on the grade |
| Melting point | about 327 °C | about 340 °C | Depends on the grade |
| Friction coefficient | 0.04 to 0.10 | 0.35 to 0.45 | Low, depends on the grade |
| Strength and stiffness | Soft, creeps under load | High | Better than standard PTFE |
| Electrical insulation | Good | Good | Good |
| Typical use | Chemical lines, low-friction seals | Load-bearing and hot parts | Seats and gaskets under constant compression |
PTFE is the usual choice for chemical lines and low-friction seals. It resists almost every industrial chemical, runs from -200 °C to +260 °C, melts at about 327 °C and has a friction coefficient of 0.04 to 0.10. It also insulates well electrically.
The trade-off is that it is soft and creeps under constant load. For seats and gaskets that stay compressed, we usually recommend modified PTFE instead.
PEEK is for parts that carry load or run hot. It is far stiffer and stronger than PTFE, works from -50 °C to 250 °C, melts at about 340 °C and is flame retardant. It is also a good electrical insulator.
Its friction coefficient is 0.35 to 0.45, higher than PTFE’s. That makes it a better fit for wear parts and structural seal components than for slick sliding surfaces.
Modified PTFE is PTFE altered to fix its biggest weakness. Compared with standard PTFE, it creeps less, is harder, lets less gas and liquid through, machines to cleaner edges and smoother surfaces, and can be welded. We use it for seats and gaskets that sit under constant compression. Ask us which grade suits your temperature and media.
Our parts go into oil and gas equipment, chemical processing, water handling and automotive assemblies. We also supply buyers in the semiconductor, aerospace and food and beverage industries.
If your application has special requirements, such as food-contact material, tell us before ordering so we can quote the right grade and paperwork.
We inspect parts before they ship, and we can send inspection and material documents on request.
Are you a manufacturer or a trading company?
We are a manufacturer. We machine the parts ourselves, in standard and custom sizes.
Do you send samples?
Yes. We send samples so you can check fit and finish before placing a bulk order. Sample terms and lead time are confirmed with your quote.
Can you make parts to my drawing?
Yes. Send a drawing or a sample part with the material and quantity, and we will quote from it.
What is your minimum order quantity and lead time?
Both depend on the material, part size and quantity. Tell us what you need and we will confirm them in your quote.
How do I choose between PTFE and PEEK?
Pick PTFE when chemical resistance and low friction matter most. Pick PEEK when the part carries load, runs hot or needs to resist wear. If a PTFE seat keeps deforming under compression, ask us about modified PTFE.
Send your drawing, material and quantity through the contact form or by email. We will reply with a quote.
