NON-RETURN VALVE ULTRA 10 WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimised valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested. Operation / Usage ● non-return valves are used to protect equipment and pipelines against dangerous reverse gas flow. Use is possible for applications according to EN 746-2 ● WITT non-return valves may be mounted in any position / orientation ● in ambient temperatures above -20 °C / 68 °F and below +70 °C / 158 °F Benefits ● a spring loaded non-return valve prevents back feeding of gases which could lead to unwanted gas mixtures ● low pressure drop – using complex valve assembly with low opening pressures (ca. 4 mbar) ● stainless steel filter (100 µm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life Maintenance ● annual testing of the non-return valve and body leak tightness is recommended ● WITT is happy to supply special test equipment ● non-return valves are only to be serviced by the manufacturer ● flow-optimised valve system for: - ultra low pressure drop - minimal noise emission ● no leaks – using of a spring loaded valve assembly with elastomer sealing ● in accordance to DIN EN ISO 5175-2 Approvals Company certified according to ISO 9001 Designed for Oxygen Service in accordance with EIGA 13/20 and CGA G-4.4: Oxygen Pipeline and Piping Systems Cleaned for Oxygen Service in accordance with EIGA 33/18 and CGA G-4.1: Cleaning of Equipment for Oxygen Service ● available in brass or stainless steel ● diverse applications – useful for many technical gases ● reduce installation costs – the spring loaded valve is not affected by gravity and may be installed in any orientation Carbon dioxide (CO2), Argon (Ar), Helium (He), Town gas (C), Ethylene (E), Natural gas (M) and LPG (P), ULTRA 10 Hydrogen (H), Nitrogen (N2), Carbon Monoxide (CO), Oxygen (O), Compressed air (D) Material Seals O-Ring Valve Stainless steel 1.4305 X8 CrNiS 18-9 AISI 303 Connection Order-No. [inch] Other gases and connections available upon request WITT-Gasetechnik GmbH & Co KG, Salinger Feld 4-8, D-5845

NON-RETURN VALVE ULTRA 10 Flow diagram for air (20 °C / 68 °F) Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Conversion factors: Butane x 0.68 Natural gas x 1.25 Methane x 1.33 Propane x 0.80 Oxygen x 0.95 Town gas x 1.54 Hydrogen x 3.75 Inlet pressure: Pv [bar] Opening pressure: 4 mbar WITT-Gasetechnik GmbH & Co KG, Salinger Feld 4-8, D-58454 Witten, Tel. +49 (0)2302-8901-0, witt@wittgas.

NON-RETURN VALVE ULTRA 12 Special versions model ULTRA 10 WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimised valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested. ULTRA 12 is based on ULTRA 10 and is customized according to the requirements of the customer - ideal for special requirements. A modular system which allows flexible material combinations for housing and sealings. Combination possibilities ● housing available in brass, stainless steel or aluminium ● sealings of NBR, CR, FKM, EPDM, FFKM...

NON-RETURN VALVE ULTRA 12 ULTRA 12 Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Flow without filter approx. 10% higher Conversion factors: Butane x 0.68 Natural gas x 1.25 Methane x 1.33 Propane x 0.80 Oxygen x 0.95 Town gas x 1.54 Hydrogen x 3.75 Inlet pressure: Pv [bar] Opening pressure: 4 mbar WITT-Gasetechnik GmbH & Co KG, Salinger Feld 4-8, D-58454 Witten, Tel. +49 (0)2302-8901-0, witt@wittgas.

NON-RETURN VALVE ULTRA 12 Examples for material combinations housing / elastomers This overview shows only some possible material combinations and connections. The modular system of ULTRA 12 offers many other diverse materials and combination possibilitis. Tell us your requirements and you will receive your individual non-return valve, precisely tailored to your application. Material Model Seals O-Ring Connection Order-No. [inch] Carbon dioxide (CO2), Argon (Ar), Helium (He), Town gas (C), Ethylene (E), Natural gas (M) and LPG (P), Hydrogen (H), Nitrogen (N2), Carbon Monoxide (CO), Oxygen (O),...

NON-RETURN VALVE ULTRA 20 WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimised valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested. Benefits ● a spring loaded non-return valve prevents back feeding of gases which could lead to unwanted gas mixtures ● low pressure drop – using complex valve assembly with low opening pressures (ca. 4 mbar) ● stainless steel filter (100 µm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life Maintenance ● annual testing...

NON-RETURN VALVE ULTRA 20 Flow diagram for air (20 °C / 68 °F) Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Normal volume flow [Nm3/h] (1013 mbar / 14.7 psi, 0 °C / 32 °F) Conversion factors: Butane x 0.68 Natural gas x 1.25 Methane x 1.33 Propane x 0.80 Oxygen x 0.95 Town gas x 1.54 Hydrogen x 3.75 Inlet pressure: Pv [bar] Opening pressure: 4 mbar WITT-Gasetechnik GmbH & Co KG, Salinger Feld 4-8, D-58454 Witten, Tel. +49 (0)2302-8901-0, witt@wittgas.

NON-RETURN VALVE ULTRA 22 Special version model ULTRA 20 WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimised valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested. ULTRA 22 is based on ULTRA 20 and is customized according to the requirements of the customer - ideal for special requirements. A modular system which allows flexible material combinations for housing and sealings. Combination possibilities ● housing available in brass, stainless steel or aluminium ● sealings of NBR, CR, FKM, EPDM, FFKM...