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Non-return Valve

g rueckschlagklappe 72


Non-return Valve

for automatic protection of the plant and the processes 
DN 15 up to DN 300 (larger nominal diameters upon request)
1/2" up to 12"
PN10 up to PN100 depending on nominal diameter and type
150 up to 600 Lbs depending on nominal diameter and type

♦ Protection: against pressure surges or damage due to contamination 
♦ Control : installed to control the flow function 

Materials: C-steel (CS), stainless steel (SS), duplex & super duplex, incoloy® & inconel, titan (Ti), zirkonium (Zr), uranus® B6, tantal (Ta), nickel (Ni), hastelloy®, monel
Design: welded, cast or manufactured out of a mono block

Operating conditions: High temperature, cryogenic temperature, abrassive and corrosive conditions
Medium: Liquids, liquids with solids, gas, powder and powdery substances, viscous and high viscous substances
Application: Fine chemical, plastics and polymer, chemical and petrochemical, nuclear, maritime and cryogenic 

♦ Metal seat
♦ Metal/PTFE seal (Operating temperature + 180°C max.)


Valve disc, cone, PTFE-ball, elongated metallic cone

Note: Not all options are compatible with each other

- Adaptation for any kind of connection
- Hard facing of the seal surfaces depending on medium and / or pressure (Typ 9..)
- Non-return valve with closing damper
- Heating jacket (except for Type 908)
- Seal and packing with FDA approval 
- Additional nozzles for cleaning and / or venting 
- Sight glass with flow direction indicator
- Sight glass with protective grid
- Safety double glazing 
- Quick opening of the filter cover


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