Safety valves When the set pressure which has been set by the factory upon customer request, is exceeded, KIESELMANN safety valves open and thus protect the connected plant part. Closing is made by spring or weight power. Fields of application: liquids and gases. Nominal widths: DN 25 – DN 100 (liquids) DN 20 / Ra 1“ (gases) ► low-maintenance design ► Optional: - Pneumatically ventable - Heatable (liquids) - Proximity indicators (liquids) - Cleaning housing (gases) - Water seal (gases) Further options: - Pneumatically ventable - Heatable (liquids) - Proximity indicators (liquids) - Cleaning housing (gases)