| MATERIALS UP TO SRNV960 |
| Pos | Denomination | Q. | Material |
| 1 | Screw | 1 | Stainless Steel |
| 2* | Washer for roller bearings | 4 | Steel alloy |
| 3* | Roller bearings | 2 | Steel alloy |
| 4 | Flange | 1 | Aluminium alloy |
| 5 | Centering ring (Only for SRNV360) | 1 | Aluminium alloy |
| 6* | O'ring (Only for SRNV360) | 1 | Nitrilic rubber |
| 7* | O'ring | 2 | Nitrilic rubber |
| 8* | O'ring | 1 | Nitrilic rubber |
| 9* | O'ring | 1 | Nitrilic rubber |
| 10* | O'ring | 1 | Nitrilic rubber |
| 11 | Screw | 1 | Stainless Steel |
| 12 | Spring | 1 | Stainless Steel |
| 13 | Cylinder spacer | 1 | Aluminium alloy |
| 14* | O'ring | 1 | Nitrilic rubber |
| 15* | Seal cap | 1 | Brass+Nitrilic rubber |
| 16 | Cap (modified) | 1 | Aluminium alloy |
| 17 | Screw | 4 | Stainless Steel |
| 18* | O'ring | 1 | Nitrilic rubber |
| 19 | Handwheel for maneuever | 1 | Steel alloy |
| 20 | Set screw | 2 | Stainless Steel |
| 21 | Protecting tube | 1 | Aluminium alloy |
| 22 | Trasparent tube | 1 | PVC
|
| 23 | Protecting cap | 1 | Aluminium alloy |
| 24 | Key | 1 | Steel alloy |
| 25 | Spring | 2 | Steel alloy |
| 26* | Rivet | 1 | Steel alloy |
| 27* | Indicator | 1 | Polypropylene |
| 28 | Lead nut maneuever | 1 | Steel alloy |
| 29 | Threaded bush (Only for SRNV240) | 2 | Stainless Steel |
| 30 | Special spring cap | 1 | Aluminium alloy |
| 31 | Pin | 1 | Steel alloy |
| 32 | Screw maneuever | 1 | Steel alloy |
| 33* | Dynamic seal (Piston) | 2 | Polyurethane |
| 34* | Piston o'ring | 2 | Nitrilic rubber |
| 35 | Piston (modified) | 1 | Aluminium alloy |
| 36* | Piston's support | 4 | P.T.F.E. carbo-graphite filled
|
| 37 | Bush | 2 | Steel alloy |
| 38 | Rotative sleeve | 2 | Steel alloy |
| 39* | Bounded | 2 | Steel alloy+Nitrilic rubber |
| 40 | Screw | 2 | Stainless Steel |
| 41 | Scotch yoke | 1 | Steel alloy |
| 42 | Shaft support | 1 | Acetalic resin |
| 43 | External elastic pin of the yoke | 1 | Steel alloy |
| 44 | Internal elastic pin of the yoke | 1 | Steel alloy |
| 45 | Shaft | 1 | Stainless Steel |
| 46 | Support bush | 1 | Acetalic resin |
| 47 | Lower sealing shaft | 1 | FKM |
| 48 | Cylinder | 1 | Aluminium alloy |
| 49 | Upper sealing shaft | 1 | FKM |
| 50 | External support ring | 1 | Acetalic resin |
| 51 | Washer | 1 | Stainless Steel |
| 52 | Seeger | 1 | Stainless Steel |
| 53 | Piston (Standard) | 1 | Aluminium alloy |
| 54 | Spring loading screw | 1 | Stainless Steel |
| 55 | Spring cap (Standard) | 1 | Steel alloy or Aluminium alloy |
| 56* | Cap o'ring | 1 | Nitrilic rubber |
| 57 | Cap (Standard) | 1 | Aluminium alloy |
| 58 | Screw | 4 | Stainless Steel |
| 59* | O'ring | 1 | Nitrilic rubber |
| 60 | Nut | 1 | Aluminium alloy |
| 61 | Insert for o'ring (Only for SRNV53-120-180-360) | 1 | Stainless Steel |
| * Components of spare part kit |