WITT non-return valves for reliable protection against dangerous reverse gas flow. Flow-optimized valve system causes very low pressure drop at minimal noise emission. Every non-return valve 100% tested.

ULTRA 32 is based on ULTRA 30 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 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. 5 mbar)
• stainless steel filter (100 μm) in the gas inlet protects the non-return valve against dirt contamination, extending the service life
• flow-optimized 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
• 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 and PED 2014/68/EU Module H
CE-marked according to PED 2014/68/EU
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