The gas-tight butterfly valves of the Gschwend type made of thermoplastics from Colasit ensure safe handling of aggressive, gaseous media. They feature a special sealing system, are available in an ATEX-compliant version for potentially explosive atmospheres and fulfil the leak test according to DIN EN 12266-1. The medium flowing through has no contact with metal parts.

Gas-tight butterfly valves Gschwend in plastic - Colasit

Specifications

Utilization

For the safe handling of corrosive exhaust air and gases

  • Pharmaceutical packaging systems, isolators for pharmaceutical applications, cleanroom technology, disinfection airlocks - e.g. for applications with H2O2 (hydrogen peroxide) as a disinfectant
  • Exhaust gas cleaning systems, biofilters, flue gas cleaning
  • Service flaps for standby fans
  • Laboratory, animal rooms
  • Process technology
  • Waste water purification systems
  • Refrigeration systems

Characteristics

  • Nominal sizes: DN 50 - 1500
  • Operating pressure: +/- 5000 Pa
  • Operating temperature: up to 90 °C

Construction

  • Housing design in:
    PP, PPs-el, PE, PE-el, PVC, PVDF
  • Flap disc design in:
    PP, PPs-el, PE-el, PVC, PVDF
  • Shaft seal design in:
    EPDM, FKM, FEP, CR, NBR
  • Spring element design in:
    EPDM, FKM
  • Standard flanges for ventilation:
    Colasit standard, Beck standard, DIN 24154
  • Optional flanges for process systems:
    DIN, VSM, ASA, BS, etc.
  • Actuation:
    manual, worm gear or electric/pneumatic

Ex Protection

EX Logo

Version available in ATEX zones 1 + 2

Accessory

  • Connecting flanges and collars
  • Assembly support for drives in accordance with ISO 5211 and DIN 3337 for the assembly of mechanical drives
  • Positioner
  • Limit switch/proximity switch, also for manually operated flaps
  • Throttles for setting the opening and closing speed
  • Pneumatics, control valves