SISTO C, 2-piece TFM/EPDM Diaphram
Perfectly for applications involving high chemical and thermal stress
This 2-piece TFM/EPDM diaphragm is perfectly suited to applications involving high chemical and thermal stress. Both TFM and EPDM comply with FDA specifications. A metal pin embedded in the TFM diaphragm helps lifting the diaphragm and thus opens the valve. To avoid damage to the diaphragm during valve closure, the metal pin is fitted to the bonnet assembly by means of a floating nut.
Technical Information
| Sizes | DN6 – DN100 |
| Temp. range | -30⁰C - 150⁰C (short-term 160⁰C) |
| Connections | Threaded pin |
| Material | TFM film backed up by second diaphragm of EPDM Rubber |
| Certificates | USP Class VI, 3.1b, FDA, EG1935 |
Tightening torques chart
| Diapphragm | MD (Membrane Diameter) | |||||||
|---|---|---|---|---|---|---|---|---|
| 30 | 40 | 65 | 92 | 115 | 168 | 202 | 280 | |
| EPDM | 1,5 | 3 | 8 | 12 | 14 | 18 | 32 | 40 |
| TFM bonded | 1,5 | 3,5 | 8 | 12 | 18 | |||
| PTFE, TFM (2-piece) | 2 | 4 | 10 | 18 | 30 | 40 | 60 | 75 |
