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WITT-Gasetechnik
Gas Safety Equipment

Gas Safety Equipment

Product catalog summary

Overview of Central Gas Supply Systems

Central gas supply systems improve safety and operational efficiency by providing continuous gas flow, minimizing cylinder handling, saving space, and allowing system flexibility and expansion. WITT offers complete solutions covering all stages from gas inlet to outlet, including mixers, pressure regulators, flashback arrestors, outlet points, electronic controls, and specialized equipment. Their products are BAM-tested and certified, ensuring high quality, high flow capacity, and low pressure loss.

Key Components and Their Functions

Flashback Arrestors

Protect equipment from reverse gas flow and flashbacks by combining multiple safety elements.
Suitable for all technical gases and installation orientations.
Available in brass or stainless steel with inlet gas filters to prevent contamination.

Pressure Regulator Stations and Outlet Points

Maintain constant gas flow and pressure control with manual or automatic change-over options.
Compact, fully assembled, and tested to reduce accident risks.
Support maximum inlet pressures up to 300 barg and outlet pressures from 0 to 60 barg.

Non-Return Valves

Prevent reverse gas flow to avoid explosive mixtures.
Operate over wide pressure (3 mbarg to 300 barg) and flow ranges (0.01 to 26,800 m³/h).
Low pressure drop and leak-proof design with spring-loaded elastomer seals.
Orientation-independent installation; brass or stainless steel options.

Safety Relief Valves

Protect downstream equipment by venting excess pressure with opening pressures from 5 mbarg to 45 barg.
Compact design with dust caps and multiple inlet connections.
Available as smart valves with visual and digital status monitoring.

Quick Couplings

Allow fast, gas-tight connections with integrated non-return valves to prevent explosive mixtures.
Color-coded probes prevent connection errors between oxygen, fuel, and inert gases.
Include dirt filters to protect hoses and equipment.

Gas Filters

Filter fine particles (0.5–80 microns) to protect downstream equipment and support high flow rates.
Replaceable filters with condensation outlets and multiple connection types.

Gas Mixers

Provide precise mixing of 2 or 3 gases with proportional or single mixing valves for infinitely variable settings.
Robust stainless steel housing; explosion-proof versions for flammable gases.
Integrated gas analysis and supply monitoring with alarms.

Test Equipment

Test safety elements including flashback arrestors and non-return valves for leak tightness, valve function, and flow capacity.
Single test rig with clear readings and maintenance-free design.

Technical Specifications and Product Data

Detailed tables specify models, materials (brass, nickel-plated, stainless steel), maximum working pressures, flow capacities, and included safety elements such as pressure actuated cut-off valves, temperature activated cut-off valves, non-return valves, flame arrestors, inlet gas filters, and pressure relief valves. Key parameters include:

Maximum inlet pressures up to 300 barg.
Outlet pressures ranging from 0 to 60 barg depending on model.
Wide flow rate ranges tailored to application needs.
Compliance with DIN EN ISO 5175-11 for flashback arrestors.

Standards and Certifications

WITT products comply with DIN EN ISO 5175-11 and are BAM-tested and certified, ensuring reliability and safety. All equipment is CE-marked according to PED 2014/68/EU and certified per EN ISO 4126-1 and VdTÜV bulletin 100, with single certification (Module F) for safety relief valves.

Recommendations and Best Practices

Implement central gas supply systems to enhance safety and efficiency.
Select safety components based on gas type, pressure, and flow requirements.
Ensure installation orientation independence for flexibility.
Regularly test safety devices using dedicated test equipment to maintain system integrity.
Utilize smart valves and electronic controls for improved monitoring and safety management.

Additional Product Details

Pressure Regulators and Main Stations: High precision, suitable for gases like natural gas, hydrogen, LPG, oxygen, acetylene, nitrogen; available with high-pressure piping on request.
Non-Return Valves: Materials include brass, stainless steel, aluminum; seals from NBR/CR, FPM/FKM, EPDM/FFKM; connections from G 1/8 to DN 100 and NPT threads.
Safety Relief Valves: Models SV 805, SV 805-ES, AV 619, AV 919; operating pressures 0.5 to 45 barg; materials stainless steel and anodized aluminum; features include manual ventilation and condensation outlets.
Gas Filters: Filter fineness 0.5 to 80 microns; materials bronze, nickel chromium, stainless steel; max pressure 50 barg; flow up to 940 m³/h.
Gas Mixers: Models KM 100, MG 50–MG 500; mixing precision ±1%; flow up to 940 m³/h; max inlet pressure 20 barg.
Special Equipment: Flame arrestors, temperature-activated cut-off valves, automatic slam shut valves, ball valves, hose reels, test equipment; pressure ratings up to 25 barg; flow rates up to 195 m³/h.

Contact and Support

International contacts are provided for sales, installation, service, and maintenance across Germany, Spain, France, UK, India, Italy, Poland, and the USA.

Critical Information Summary

Materials: Brass, stainless steel, aluminum with various seal materials for gas compatibility.
Pressure Ranges: From millibar levels up to 300 barg depending on device and gas.
Connections: Various thread types including G, NPT, and DIN flanges.
Safety Features: Non-return valves, safety relief valves with manual ventilation and condensation outlets, flashback arrestors.
Compliance: CE marking and adherence to European pressure equipment directives and international standards.

This comprehensive product range ensures safe, precise, and reliable gas control and safety solutions for industrial and technical gas applications.

Catalog excerpts

Rely on WITT for gas safety technology. HOW IMPORTANT IS SAFE GAS SUPPLY? ANDREAS HEYER: SENIOR PRODUCT MANAGER – WITT-GASETECHNIK

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CENTRAL GAS SUPPLY SYSTEMS INCREASE SAFETY AND PRODUCTIVITY! Continuous gas supply, improved safety by less transportation of gas cylinders, more space at the point of use, flexibility and expandability – central gas supply systems offer numerous benefits. Field-proven solutions by WITT ensure the optimal realisation from gas inlet to outlet point, from conception to implementation. As market leader with longtime experience WITT offers all components for central gas supply systems – gas mixers, pressure regulator stations, flashback arrestors, outlet points, electronic control and special equipment....

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For regulators, outlet points, pipelines › FLASHBACK ARRESTORS › PRESSURE REGULATOR STATIONS AND OUTLET POINTS Dome pressure regulators Pressure regulator stations Outlet points Electronic switch and control › NON-RETURN VALVES › SAFETY RELIEF VALVES › QUICK COUPLINGS (for outlet points, pipelines, torches) › SPECIAL EQUIPMENT Decomposition Arrestors Automatic slam shut valves Ball valves Safety hose reels

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PRODUCT PORTFOLIO FLASHBACK ARRESTORS Protection of single cylinders, outlet points or pipelines against reverse gas flow and flashbacks: • Combination of all safety elements for optimal protection • Extinguish dangerous flashbacks or backfire • Avoid explosive mixtures in the gas supply • Wide product range for all kinds of applications • For all technical gases • Installation independent of the orientation • Long service life due to protection against dirt – via filter at gas inlet • All connections available • Available in brass or stainless steel PRESSURE REGULATORS Constant gas flow and...

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QUICK COUPLINGS Safe and quick connection of equipment: • Lightning fast connection and disconnection of equipment • Gas-tightness when disconnected • No build-up of explosive gas-mixtures in the pipe line – because of non-return valve • No confusion between connections – because of different probes for Oxygen, Fuel and Inert Gases • Simplest selection of the right body and probe – because of new colour coded probe • All connections available • Dirt-filter protects hose coupling and equipment Reliable filtration of the finest dirt particles in gases: • For pipelines and gas outlet points. Some...

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for regulators, outlet points, pipelines, DIN EN ISO 5175-1 Temperature activated Cut-off Valve (TV) 16 barg 4 barg 4 barg 4 barg 8 barg 10 barg 12 barg Safety elements Inlet Gas Filter – depending on connection Gases / Max. working pressures / Flows Pressure Relief Valve Pressure actuated Cut-off Valve (PV)

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for regulators, outlet points, pipelines, DIN EN ISO 5175-1 Temperature activated Cut-off Valve (TV) 5 barg 10 barg 10 barg Safety elements Inlet Gas Filter – depending on connection Gases / Max. working pressures / Flows 16 barg 4 barg 4 barg 4 barg 5 barg 11 barg 8 barg Pressure Relief Valve Pressure actuated Cut-off Valve (PV)

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for regulators, outlet points, pipelines, DIN EN ISO 5175-1 › FLASHBACK ARRESTORS Temperature activated Cut-off Valve (TV) Pressure actuated Cut-off Valve (PV) 10 barg 5 barg 5 barg 5 barg Inlet Gas Filter – depending on connection Safety elements Gases / Max. working pressures / Flows 1,5 barg 0,2 barg 1,5 barg 2 barg 1,5 barg 3 barg 2 barg 1,5 barg 3,5 barg hose nipple Pressure Relief Valve

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Pressure Relief Valve hose nipple Safety elements Inlet Gas Filter – depending on connection Gases / Max. working pressures / Flows Pressure actuated Cut-off Valve (PV) Temperature activated Cut-off Valve (TV)

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Safety elements Inlet Gas Filter – depending on connection Gases / Max. working pressures / Flows MORE SAFETY IS NOT POSSIBLE Pressure Relief Valve Pressure actuated Cut-off Valve (PV) › FLASHBACK ARRESTORS Temperature activated Cut-off Valve (TV)

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› PRESSURE REGULATORS, MAIN PRESSURE REGULATING STATIONS AND OUTLET POINTS Set including Pilot pressure regulator, inlet and back pressure gauge, connections up to G3“, flange DN80/100 Dome pressure regulator Smart Version Modell 747/757/767 Set including 737LE-HD/S-ES Pilot pressure regulator, inlet and back pressure gauge, 737LE/S-ES connections up to 747LE/S-ES G3“, flange DN80/100 757LE/S-ES 76LE/S-ES Manifold pressure regulator Max. inlet pressure Dome pressure 25 barg regulator; Outlet pressure 2,5 barg version 0–1,5 barg available (2,5 barg) Max. flow 75 m3/h Max. inlet pressure 25 barg...

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› PRESSURE REGULATORS, MAIN PRESSURE REGULATING STATIONS AND OUTLET POINTS Gases / Max. working pressures / Flows Max. inlet pressure 25 barg Max. inlet pressure 300 barg Max. inlet pressure 75 barg Max. inlet pressure 300 barg Max. inlet pressure 300 barg Max. inlet pressure 25 barg Max. inlet pressure 25 barg Max. inlet pressure 25 barg Max. inlet pressure 300 barg Max. inlet pressure 75 barg Max. inlet pressure 300 barg Max. inlet pressure 300 barg Max. inlet pressure 300 barg Max. inlet pressure 300 barg Manual or automatic Outlet pressure Outlet pressure Outlet pressure Outlet pressure Outlet...

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› PRESSURE REGULATORS, MAIN PRESSURE REGULATING STATIONS AND OUTLET POINTS HIGH PRESSURE PIPING ON CUSTOMER REQUEST MAXIMUM PRECISION AND CONSISTENCY FOR YOUR GAS PRESSURE

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› NON-RETURN VALVES 30 mbarg 1,5 barg 25 barg 4 mbarg 1,5 barg 16 barg free combination of materials for housing (brass, stainless steel, aluminum) and seal (NBR/CR, FPM/FKM, EPDM/FFKM) Opening pressure Gases / Max. working pressures free combination of materials for housing (brass, stainless steel, aluminum) and seal (NBR/CR, FPM/FKM, EPDM/FFKM)

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› NON-RETURN VALVES Opening pressure Gases / Max. working pressures free combination of materials for housing (brass, 5 mbarg 1,5 barg stainless steel, aluminum) and seal(NBR/CR, FPM/ FKM, EPDM/FFKM) free combination of materials for housing (brass, stainless steel, 5 mbarg aluminum) and seal (NBR/CR, FPM/ FKM,EPDM/FFKM) ULTRA PERFORMANCE NOW AS STANDARD

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