Soft-sealing wafer butterfly valve for HVAC, water and energy systems.
The KSB butterfly valve BOAX-S is a centric, soft-seated industrial valve in wafer design for water, energy and HVAC systems. With its compact, maintenance-free construction, the reliable elastomer liner and the high-grade stainless steel disc, the BOAX-S offers a durable, universally applicable solution for drinking water, heating and cooling circuits as well as building services systems. Thanks to the ISO 5211 interface it is ideal for integrated automation.
In combination with AirTorque actuators and accessories – matched to the BOAX-S wafer butterfly valve.
The BOAX-S is clamped between two flanges and needs no flanges of its own – the lighter and less expensive version. Where one side has to be dismantled, the BOAX-SF with threaded lugs is required.
| Feature | Specification |
| Type | BOAX-S (wafer type) |
| Nominal size (DN) | DN 20 – DN 600 |
| Nominal pressure (PN) | PN 6 / 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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