The DN100 (4 inch) wafer butterfly valve from Laux Valve features a soft seat with tongue and groove (T&G) seat retention design and a lightweight aluminum lever handle. The tongue and groove seat locking mechanism ensures positive seat retention under pressure and vacuum conditions, preventing seat movement, extrusion, or blowout — a significant reliability advantage over standard press-fit or bonded seats.
Ideal for water treatment, HVAC, irrigation, and general industrial applications requiring reliable bubble-tight shut-off at an economical price point.
| Parameter | Specification |
| Size | DN100 (4") |
| Type | Wafer Butterfly Valve |
| Body Material | Ductile Iron ASTM A536 65-45-12 |
| Disc Material | Ductile Iron / CF8M Stainless Steel (Optional) |
| Seat Type | Soft Seat with Tongue & Groove Retention |
| Seat Material | EPDM (Option: NBR) |
| Body Coating | Electrostatic Epoxy, min 80 microns |
| Pressure Rating | PN10 / PN16 / Class 150 |
| Face-to-Face | API 609 Table 1 / EN 558 Series 20 |
| Test Standard | API 598 / EN 12266-1 |
| Temperature Range | -20°C to +110°C (EPDM) |
| Operation | Aluminum Lever Handle (10-position locking) |
| Lever Material | Aluminum Alloy, anodized finish |
