PTFE Ball
PTFE balls, or Teflon balls are circular shaped. These balls are made from virgin PTFE or filled PTFE. Usually, the virgin PTFE balls are white while the filled-PTFE balls may have different colors.
The PTFE balls offer non-stick and frictionless performance. Adding graphite makes the PFTE ball more slippery. At the same time, carbon-filled PTFE balls have high strength and load-bearing capacity. On average, PTFE ball tensile strength is approximately 3900 psi.
Although PTFE balls are inherently non-dissipative, adding graphite makes the PTFE-lined balls anti-static and improves electrical or thermal properties.
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Therefore, when it comes to improving PTFE ball valves performance, you may add other fillers such as:
- 25% glass
- 10% carbon
- 10% carbon and 10% glass or,
- 50% 316 SS
The filler will depend on specific properties you want Teflon balls to have other than the inherent properties of PTFE.
When it comes to the load-bearing capacity such as in PTFE ball bearings, analyzing the hardness is critical. Most Teflon balls have a hardness ranging between 50D and 65D.
Another significant performance of Teflon balls is the superior chemical resistance and wide working temperature varying from -400°F and +550°F.
Applications of Teflon Valves
Whether you opt for standard or precision Teflon balls, you will use these accessories in any of these applications;
- Hydraulic or plumbing systems such as PTFE ball valves or PTFE lined ball valves in check valves, floating valves, etc.
- For cleaning systems, you will require a PTFE spray valve
- Transmission systems have PTFE ball bearing
- Slide plates and compressors use PTFE balls
For specialized applications, PTFE ball manufacturers may have solid or hollow PTFE ball valves.
- Properties of the PTFE Balls
| Property | Type | U.o.M. | Values | U.o.M. | Values |
| Hardness | Mechanical | [Shore D] | 50 – 65 | – | – |
| Compressive yield strength | Mechanical | [MPa] | 7 – 30 | [psix10^3] | 1 – 4 |
| Service temperature | Thermal | [ºC] | -269 / 250 | [ºF] | -436 / 482 |
