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 customised 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 for example
• with or without dirt filter in gas inlet

Benefits

• precisely tailored design for special requirements. For example corrosive environments, acetylene, ultra-lightweight construction, temperatures above 70 °C / 158 °F

• 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 (approx. 4 mbar)
• stainless steel filter (100 μm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life
• 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
• available in brass, stainless steel or aluminium
• 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

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

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

Approvals
Company certified according to ISO 9001
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems