Non-return Valve / Check Valve ULTRA 20

Ultra-performance protection against gas return: compact, quiet, ideal for low pressure applications. Opening pressure approx. 4 mbar, working pressure up to 16 bar, G / NPT 1", 1/2", 3/4"

safety element: non-return valve [NV]
every non-return valve 100% tested
DIN EN ISO 5175-2
ultra-low opening pressures (approx. 4 mbar), ultra-low pressure drop
compact and light: 52 X 67,5 mm, 510 g, G / NPT 1", 1/2", 3/4"
minimal noise emission
dirt filter (100 μm) on gas inlet
ideal for applications where low pressures are used e.g. thermal processing, biogas etc.

This model is also available in Stainless Steel

Information

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
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 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
the same size as model NV200 for easy replacement

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

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
Cleaned for Oxygen Service according to: EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems