ULTRA 40 – Ultra Performance non-return valve: compact, quiet, ideal for low-pressure applications

WITT backflow preventers for reliable protection against dangerous gas backflow in plants and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Backflow preventer [NV] every backflow preventer 100% tested DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure losses – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 35 x 60 mm, 221 g minimal noise emission offer long service life through protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – thanks to the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT backflow preventers for reliable protection against dangerous gas backflow in plants and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Backflow preventer [NV] every backflow preventer 100% tested DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure losses – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 35 x 60 mm, 221 g minimal noise emission offer long service life through protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – thanks to the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT backflow preventers for reliable protection against dangerous gas backflow in plants and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Backflow preventer [NV] every backflow preventer 100% tested DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure losses – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 35 x 60 mm, 221 g minimal noise emission offer long service life through protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – thanks to the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT backflow preventers for reliable protection against dangerous gas backflow in plants and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Backflow preventer [NV] every backflow preventer 100% tested DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure losses – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 35 x 60 mm, 221 g minimal noise emission offer long service life through protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – thanks to the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications according to EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 4 mbar) compact and lightweight: 52 x 67.5 mm, 510 g minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special designs are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!

WITT non-return valves for reliable protection against dangerous gas backflow in installations and pipework systems. The flow-optimised valve system ensures very low pressure loss with minimal noise emission. Every backflow preventer is 100% tested. The backflow preventers are tested in accordance with DIN EN ISO 5175-2. Highlights : Safety element: Gas non-return valve [NV] every gas non-return valve is 100% tested in accordance with DIN EN ISO 5175-2 Suitable for use in applications in accordance with EN 746-2 offer minimal pressure loss – thanks to a sophisticated valve system with very low opening pressures (approx. 5 mbar) compact and lightweight: 73.5 x 111 mm, approx. 1.8 kg minimal noise emission offer long service life thanks to protection against contamination from the gas supply – via a dirt filter at the inlet made of stainless steel wire mesh (100 μm) the ambient temperature must be between a minimum of -20 °C and a maximum of 70 °C minimal leakage – through the use of a spring-loaded valve system with elastomer seals wide range of applications – suitable for use with many technical gases reduce planning effort through layer-independent installation Special versions are not available in the shop, but can be supplied on request. If you have specific requirements or special requests, please contact us – we’ll be happy to help!