Non-Return Valves | wittgas.com

Non-Return Valves / Check Valves

Connection

Material

Reset Filter
Witt Non Return Valve ULTRA 10

Non-return Valve ULTRA 10

Ultra performance protection against gas return: compact, quiet, ideal for low pressure applications. Opening pressure approx. 4 mbar, up to 16 bar, G ½"

Witt Non Return Valve ULTRA stainless steel

Non-return Valve ULTRA 10, stainless steel

Ultra performance protection against gas return: compact, quiet, ideal for low pressure applications. Opening pressure approx. 4 mbar, up to 16 bar, G ½"

Witt Non Return Valves ULTRA 12

Non-return Valve ULTRA 12

Based on ULTRA 10 – your customized design: multiple combinations of housing and seal materials, with or without filter

Witt Non Return Valve Ultra 20

Non-return Valve ULTRA 20

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

Witt Non-return Valve ULTRA 20, Stainless Steel

Non-return Valve ULTRA 20, Stainless Steel

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

WITT Non-return valves ULTRA 22

Non-return Valve ULTRA 22

Based on ULTRA 20 – your customized design: multiple combinations of housing and seal materials, with or without filter

Non-return valve 654

Non-Return Valve NV654

Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 870 psi, G 1/8

Non-return valve 654-ES

Non-Return Valve 654-ES

Non-return valve stainless steel for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 870 psi, G 1/8

Non-return valve NV100

Non-Return Valve NV100

Non-return valve for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 362 psi, G 1/8 - 3/8

Non Return Valve NV100 Stainless Steel

Non-return Valve NV100, Stainless Steel (formerly R53-ES)

Non-return valve stainless steel for the prevention of unintended gas mixtures, for flow rates up to 11,059 scfh (air), up to 362 psi, G 1/8 - 3/8

Products

Give us a call!

Headquarters: +49 (0)2302-8901-0
WITT USA: +1 770-664-4447

Quotation request Get call-back

A safe gas supply with gas non-return valves

WITT gas non return valves (check valves) are used to protect plants, piping systems and outlet points against dangerous gas backflow and unwanted gas mixtures. Key features of WITT’s unique design are their very low opening pressures and very low pressure drop, so they are particularly suited to low operating pressure applications. A high-quality sealing system with elastomers prevents leaks. Dirt filters at the inlet ensure the long service life of these devices.

Non-return valves are also known as gas back-flow valves or check valves. WITT gas non-return valves can be installed in any orientation. They are available with various connections, in brass or stainless steel, and can be used for all technical gases such as oxygen, nitrogen, methane, hydrogen and compressed air. The WITT product range offers a wide selection of nominal sizes (up to DN 200) and flow rates.

WITT non-return valves in thermal processing plants

WITT non-return valves conform to EN 746-2 and are particularly suitable for use in thermal processing plants. The low opening pressure of only 3 mbar and the high flow rate provide ideal protection for burner systems and prevent gas backflow and flashbacks.

WITT non-return valves can be installed in the air or oxygen line as well as in the fuel gas supply, thus reducing acquisition and storage costs. WITT non-return valves are 100% tested to DIN EN 5175-2 prior to delivery and offer the highest level of safety.

Safe biogas plants with WITT gas non-return valves

In the air delivery lines to fermenters and biogas lines, WITT gas non-return valves are also characterized by their ultra-low opening pressures. WITT stainless steel valvesfor operation in biogas plants allow an air flow only in one direction and thus avoid unwanted and dangerous gas mixtures. Due to their low pressure losses, the use of small pipe cross-sections is possible, which reduces the operating costs for the compressor performance. WITT check valves are particularly leak-tight and therefore particularly safe. The valves are 100% tested and conform to DIN EN ISO 5175-2. The use of stainless steel in the gas return valves ensures a long service life, as these materials are extremely resistant to corrosion. They can also be retrofitted into existing air and gas supply lines.

Flyer: Non-return valves in thermal processing plantsFlyer: Non-return valves in biogas plants

Give us a call!

Headquarters: +49 (0)2302-8901-0
WITT USA: +1 770-664-4447

Quotation request Get call-back

Expert advice

You need advice?
We call you back!

Request call-back now