Diaphragm in-line valve VM 25 VM series valves are hand-operated diaphragm valves. They are used, e.g., as isolation valves, air-admittance valves or manual-control valves. By rotation of the wheel a flexible PTFE diaphragm is moved and pressed against the stainless steel seating or removed from it, closing and opening the valve, respectively. The gas-contacting parts are made of stainless steel and PTFE offering a good resistance to corrosive gases and vapors.
| Manufacturer | BRAND (BrandTech Scientific) |
| Flange connection | small flange KF DN 25 |
| Operation | Manual |
| Leakage rate | 1 x 10 -4 mbar l/s |
| Fitting length between flanges | 100 mm |
| Upper ambient temperature (operation) | 60 °C |
| Lower ambient temperature (operation) | 0 °C |
| Max. gas temperature | 80 °C |