| PART NAME | MATERIAL |
| Body | ASTM A216 WCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M |
| Bonnet | ASTM A216 WCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M |
| Ball body | SS 304, SS 316, SS 316L, SS 316L + STL |
| Seat | PTFE, PPL, Metal seal, etc. |
| Cover board | ASTM A216 WCB, ASTM A351 CF8, ASTM A351 CF8M, ASTM A351 CF3M |
| Middle head gasket | PTFE, PPL, Metal gasket |
| Stem | SS 304, SS 316, SS 316L, 17-4PH, S20910 |
| Inverted seal | PTFE, PPL, Stainless steel wound graphite |
| O-ring | VITON |
| Filler | PTFE, PPL, Flexible graphite |
| Filling clamping ring | SS 304 |
| Butterfly spring | SS 304 |
| NUT | 2H, SS 304 |
| Gland of valve | CF8 |
| Screw | B7, SS 304 |
| Screw | B7, SS 304 |
While circular knitting machines are generally safe to use, it is important to follow the manufacturer’s instructions and take necessary precautions. This may include wearing protective gloves and avoiding loose clothing near the machine.