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Pneumatic Seal Manufacturer in China: Sourcing Guide for Cylinder and Valve Seals
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.
Pneumatic Seal Profiles Supplied by CORASEALS
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.
- Piston seals for cylinder pistons
- Rod seals for cylinder rods
- Wiper seals and scraper seals for rod contamination
- Buffer seals for end stroke pressure spikes
- Wear rings and guide rings for piston and rod guidance
- U-cup seals for pneumatic piston and rod sealing
- V-packing for adjustable sealing stacks
- Compact seals for short groove designs
- O-rings for pneumatic valve, fitting, and static gland sealing
- Pneumatic cylinder seal kits
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.
Material Selection for Pneumatic Seals
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.
Information Needed for a Pneumatic Seal Quote
For standard or custom pneumatic seals, send the following data. This reduces errors and shortens quote time.
- Cylinder bore diameter and rod diameter
- Groove ID, OD, width, and depth
- Seal profile, drawing number, or sample photo
- Operating pressure range
- Operating temperature range
- Air quality, including oil mist, dry air, moisture, or chemicals
- Cylinder speed or cycle rate
- Required material and Shore A hardness
- Quantity per size
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.