Custom machined part
Plastic gaskets
- Forms
- Ring, full-face & custom
- Common plastic
- PTFE, virgin & filled
- Starting point
- Your specs or old gasket
- Features
- Steps, grooves & sealing lands
Custom machined PTFE (Teflon) and plastic gaskets for flanges, covers, manways and housings. Made to your specs or matched to your old gasket, including nonstandard bolt patterns, thick sections and machined features.
- ±0.002"–±0.005" on critical dimensions
- Family owned in Aurora since 1986
- Expedited service for breakdowns
Gasket forms
Ring, full-face or custom
A gasket is compressed between two faces that don’t move, and seals the joint between them. Most fall into one of these three forms.
- DIAGRAM: ring gasket inside the bolt circle, plan view
Ring
A flat ring that sits inside the bolt circle, centered by the bolts.
Common on Raised-face pipe flanges and many cover joints
- DIAGRAM: full-face gasket with bolt holes, plan view
Full-face
Covers the whole flange face, with the bolt holes machined through it.
Common on Flat-face flanges, manways and sight glasses
- DIAGRAM: custom-outline gasket with ports and a machined step
Custom profile
Any other outline, plus steps, grooves, sealing lands, large one-piece rings or thick sections.
Common on Valve and pump covers, filter and RO housings, heat-exchanger heads
What defines the gasket
The sizes we machine to
We machine gaskets to customer specs. We work from your drawing, or from these sizes, and ask about anything we need.
| Ref | Dimension | Details |
|---|---|---|
| A | Inside diameter | The bore, or the opening the flow passes through. |
| B | Outside diameter or outline | The OD for a ring, or the full outline for a custom shape. |
| C | Thickness | As drawn, or of an unused gasket. A crept one will measure thin. |
| D | Bolt circle | For full-face gaskets: the diameter through the bolt-hole centers. |
| E | Bolt holes | How many, their size, and any that are slotted. |
| F | Machined features | Steps, grooves, counterbores, sealing lands, ports or cutouts. |
- The service
-
- What it seals
- Concentration
- Temperature range
- Operating pressure
- Heat cycling
- Cleaning or sterilization
- The specs
-
- Your drawing and revision
- Or the flange standard and size
- Plastic and grade, if specified
- Quantity
A used gasket may have crept, extruded or swollen, so it may not keep its original thickness, outline or hole positions. Send the drawing, part number or mating-face measurements with it if you have them.
Getting a quote
Start with what you have
Any one of these is enough to get a quote started. Pick yours to see what helps.
Send the drawing and we machine to it.
- Quantity
- Plastic and grade, if specified
- What it seals, and the temperature
Upload drawings, CAD files or photos on the quote form.
Send the old gasket and photos of the flange faces.
- Bolt count and hole size
- What it seals
- Quantity
Upload drawings, CAD files or photos on the quote form.
Tell us the flange standard and size, and what it seals.
- Standard, size and class
- Ring or full-face
- Thickness, if known
Upload drawings, CAD files or photos on the quote form.
Plastics for gaskets
Chosen for what it seals
- Virgin PTFE Chemically inert and the most common plastic gasket. It’s soft and can creep under bolt load, so retained compression matters.
- Filled PTFE Glass, carbon or bronze fillers reduce creep and cold flow. Check the filler against what it seals.
- PVDF Strong chemical resistance, and stiffer than PTFE.
- Polypropylene Economical chemical resistance in water and process service.
- HDPE and UHMW Tough and economical for water and lower-temperature joints.
- PEEK For higher temperatures, where stiffness and low creep matter.
- Detectable grades Metal- and X-ray-detectable plastics for lines with inspection systems.
Machined in Aurora
How your gaskets are made
±0.002"–
±0.005"
On critical dimensions, depending on the plastic. Specs and CAD files are kept, so a reorder matches the last batch.
-
Milled or turned
Flat and full-face gaskets CNC milled from plastic sheet. Ring gaskets turned from rod or tube.
CNC millingCNC turning -
Clean edges, even thickness
Machining gives clean edges, accurate hole positions and an even thickness across the sealing face.
-
One gasket to repeat orders
A single replacement for an obsolete joint, or repeat runs for equipment you build.
Evaluating a supplier? See the shop and how we check the work.
Where plastic gaskets seal
Buyer questions
Plastic gasket FAQs
Something else? Call (630) 904-2525.
We machine gaskets to customer specs. Send your drawing, or the flange standard and size your joint uses, and we’ll quote to those dimensions.
Detectable plastic grades can be quoted. Metal- and X-ray-detectable grades work with different inspection systems, so tell us which your line uses.
We hold ±0.002" to ±0.005" on critical dimensions, depending on the plastic. We review your drawing and confirm the critical dimensions, such as thickness and bolt circle, with your quote.
Timing depends on the gasket, plastic and quantity, and comes with your quote. For an emergency breakdown, ask about our expedited service.
Not a gasket?
Find the right part
We machine almost any plastic part. If yours isn’t listed, describe it in a quote request.
- It seals against a moving ball, disc or plug PTFE valve seats
- It flexes as the parts around it move Bellows
- It spreads a fastener’s load Washers
- It breaks an electrical or heat path Insulating rings
- It closes off a port or fitting Sealing caps
- You only have the old part, any type Reverse engineering
Standard quote
Ready to send your gasket details?
Experienced help from your first quote to the finished part.