Soft-seated butterfly valve with authorized end fitting suitability
The KSB butterfly valve BOAX-SF in lug design is a centric, soft-seated industrial valve for applications in water, energy and HVAC systems. The robust ductile iron body, the high-grade elastomer liner and the approved end-of-line suitability make the BOAX-SF a durable, versatile and reliably sealing solution. Thanks to the ISO 5211 flange it is ideal for automated HVAC, water and industrial circuits.
In combination with AirTorque actuators and accessories – matched to the BOAX-SF lug butterfly valve.
The BOAX-SF is the lug version with threaded lugs – it holds the pipe even when the downstream side is dismantled. For pure wafer installation the BOAX-S in wafer design is sufficient.
| Feature | Specification |
| Type | BOAX-SF (Lug-Type) |
| Nominal size (DN) | DN 20 – DN 600 |
| Nominal pressure (PN) | PN 10 / PN 16 |
| Housing material | EN-GJS-400-15 (ductile iron) |
| Disc material | Stainless steel 1.4301 / 1.4308 |
| Seat/gasket | EPDM-XU, Nitrile-K, Epichlorohydrin EG |
| Temperature range | -10 °C to +130 °C (depending on gasket) |
| Standards | EN 593, EN 12266-1, ISO 5752-20, EN 558-1-20 |
| Face-to-face length | ISO 5752 Series 20 |
| Flanged connection | EN 1092-1 |
| Drive flange | ISO 5211 |
| Leakage rate | A according to EN 12266-1 |
| Coating | Epoxy resin or polyurethane, orange RAL 2002 |
| Special features | Maintenance-free, automation possible |
Our insulations are more than just accessories – they perfectly complement valves and systems and increase efficiency, safety and adaptability.
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