BOAX-S/SF Butterfly valve

Butterfly valve BOAX-S/SF

Centred-disc butterfly valve with ISO 5211 compliant square shaft end for butterfly valves from DN 350, with heat barrier and elastomer liner (EPDM XU or nitrile K), with lever, manual gearbox or electric actuator (BOAXMAT-S and BOAXMAT-SF); semi-lug body (T2) or full-lug body (T4) for downstream dismantling and dead-end service. Valve disc made of stainless steel 1.4308, connections to EN.
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Main Applications

  • Hot-water heating systems
  • Air-conditioning systems
  • Domestic water supply
  • Paint shops

Technical Data

Nominal pressure
PN 6, PN 10, PN 16
Max. nominal size
DN 600
Max. allowed fluid temperature
130 °C

Material number list – BOAX-S/SF

320 products
Material number
BOAX-S PN 6/10/16 DN100 einzelverpackt5.1 kg48013984
BOAX-S PN 6/10/16 DN125 einzelverpackt6.1 kg48013985
BOAX-S PN 6/10/16 DN150 einzelverpackt8.8 kg48013986
BOAX-S PN 6/10/16 DN200 einzelverpackt12.9 kg48013987
BOAX-S PN 6/10/16 DN25 einzelverpackt1.1 kg48013978


  • Thermometer of accuracy class 1 (optional). Please indicate when ordering the valve.
  • Valve certified to
    • DVGW, ÖVGW, SVGW and BELGAQUA for drinking water applications, with EPDM elastomer liner, approved by KTW, ILP Nancy

Technical Data

Shut off/control flow
Design concept Drive
With electric actuator,
With handwheel,
With pneumatic actuator
Casing material
Nominal pressure
PN 6,
PN 10,
PN 16
Max. nominal size
DN 600
Min. nominal size
DN 20
Max. allowed fluid temperature
130 °C
Min. allowed fluid temperature
-10 °C
Valve body type
Semi-lug type,
Full-lug type, raised faces

Sectional Drawings

Inspection service

Inspection service

KSB’s inspection service provides regular pump inspection and pump maintenance to ensure the reliable operation and increased availability of your system.

  • Preventing failures
  • 24-hour on-call service
Installation and commissioning

Installation and Commissioning

Reliability right from the start: KSB service specialists are there to take care of your system with the installation of pumps, valves and automation components. Professional, reliable, on hand worldwide.

  • For a start-up as required
  • Also for non-KSB products
Valve repair

Valve repair

Bespoke, individual, comprehensive: KSB provides professional valve service for all makes – regardless of the design, size and manufacturer.

  • Repair
  • Modification