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Quick Answer: CORASEALS is a China-based industrial seal supplier that provides pneumatic seals, pneumatic cylinder seal kits, rod seals, piston seals, wiper seals, wear rings, U-cup seals, V-packing, and custom pneumatic sealing parts. Send the cylinder bore, rod diameter, groove dimensions, operating pressure, temperature, air quality, seal profile, and required quantity for a quote.
Pneumatic cylinders operate fast. Many air circuits run with light oil mist or dry air. Seal friction must be low, and wear life must be predictable. CORASEALS supports buyers who need a pneumatic seal manufacturer in China for standard profiles and custom sizes.
Standard profiles cover most pneumatic cylinder and air valve requirements. We supply the following profiles as individual seals or as part of a seal kit.
Do not select a seal by type code alone. Codes such as UN, UHS, or KDAS may not match across different catalogs. Confirm the groove shape, ID, OD, width, and installed direction before ordering.
Air quality changes the material choice. A pneumatic seal for dry air is not the same as a seal for oil mist air. Use the table below as a general selection guide.
| Material | Common Pneumatic Use | Check Before Ordering |
|---|---|---|
| NBR | Standard air cylinders with mineral oil mist | Avoid if ozone, high heat, or aggressive chemicals are present |
| FKM | High temperature air, chemical exposure, some aggressive gases | Higher cost, check friction and low temperature limit |
| EPDM | Dry air, clean air, water-based fluids | Not for most mineral oil mist or petroleum lubricants |
| Silicone | Low temperature clean air, food and medical air circuits | Low wear resistance, not for high load or high cycle |
| Polyurethane or TPU | High cycle cylinders where wear resistance is important | Check humidity and upper temperature limits |
| Filled PTFE | Low friction, dry running, low lubrication requirements | Requires correct groove and energizer design |
Material hardness is selected with the seal profile, pressure, and groove fit. Do not change hardness without checking the cylinder design.
For standard or custom pneumatic seals, send the following data. This reduces errors and shortens quote time.
For inch cylinders, state both inch and metric sizes when possible. A 2 inch bore cylinder and a 50 mm bore cylinder are not the same. Mixing unit systems creates wrong groove fits and leak paths.
When you compare pneumatic seal manufacturers in China, ask for the profile drawing before quoting. A clear drawing shows the lip shape, groove fit, and installed orientation. Ask the supplier to confirm the seal material and hardness against the operating conditions.
Check the rod surface finish, the bore surface finish, the chamfer, and the rod runout. A good seal can fail early if the metal surfaces are not within the required range. Send surface condition details if the cylinder has scoring, rust, or heavy wear.
For batch orders, request traceability. Ask for a material certificate and inspection report where the application requires it. CORASEALS can support material, size, and profile checks before shipment.
CORASEALS can source custom pneumatic seals to drawing or sample. Custom profiles include non standard U-cups, compact piston seals, rod wipers, and complete pneumatic cylinder seal kits for repair programs.
Send us the cylinder bore, rod diameter, groove dimensions, operating pressure, temperature, air quality, seal profile, and required quantity. If you have a drawing or sample photo, include it. We will review the seal profile and recommend a part for confirmation.
What pneumatic seals does CORASEALS supply?
CORASEALS supplies pneumatic piston seals, rod seals, wiper seals, scraper seals, buffer seals, wear rings, guide rings, U-cup seals, V-packing, compact seals, O-rings, and pneumatic cylinder seal kits.
Can CORASEALS supply custom pneumatic seals from China?
Yes. Send the groove dimensions, seal profile, material, hardness, and operating conditions. If a drawing or sample is available, include it for review.
What is the difference between a rod seal and a piston seal in a pneumatic cylinder?
A rod seal seals the dynamic interface between the rod and the head. A piston seal seals the dynamic interface between the piston and the bore. The lip direction and groove position are different.
Which material is best for pneumatic cylinder seals?
No single material fits all pneumatic cylinders. NBR works for many oil mist air circuits. FKM covers higher heat or chemical exposure. EPDM is used for dry air or clean air systems. Confirm air quality and temperature before choosing.
What information should I send for a pneumatic seal kit quote?
Send the cylinder bore, rod diameter, groove dimensions, cylinder model if available, operating pressure, temperature, air quality, seal profile, and required quantity. A photo of the old seal kit also helps.
