NANOCHEM® Weld Knight™ purifiers provide purge and shield gas purification for welding applications. Weld gas impurities, such as moisture and oxygen, adversely affect weld quality. These impurities are present in gas cylinders and can also be introduced through leaks in the line or during cylinder changes. 

NANOCHEM® INX-Plus™ media react chemically and irreversibly with these impurities to deliver consistently pure gas to the weld site, improving weld quality. NANOCHEM® MigMix media is specifically designed to purify Ar/O₂, Ar/CO₂ and other O₂, or CO₂ blends. 

NANOCHEM® MigMix provides customers with the ability to use blended gas without the worry of reducing their tolerances or dilution ratios. MigMix is also better than any  media for the removal of moisture impurities.

NANOCHEM® Weld Knight™ purifiers are an economical solution for GMAW (TIG) welding and other critical welding applications.
• Flow Rates up to 530 cfh (250 slpm)
• Easy to use canister bypass mode for canister changes and extended shutdowns
• Field replaceable canisters available
• Canister can be refilled, enabling savings over purchase of spare canisters

Features and Benefits

• Removes impurities to < 10 ppb (-150ºF Dew Point)
• Enhances weld quality, strength and appearance
• Reduces weld porosity and oxidation
• Increases weld electrode lifetime – No need to stop welding to grind/replace electrode
• Reduces weld rejects
• Filters at canister inlet and outlet
• Operates at room temperature
• No power requirements
• NANOCHEM® Inorganic Media – Prevents contamination from system upsets, such as air intrusion or connection of wrong gas cylinder
• NANOCHEM® MigMix Purifier – Designed for customers with gas blend welding needs
• Field Replaceable Canister
• New Stainless Canisters can be refilled – Savings over cost of replacement canister.  Reduction in generation of solid waste

^#Note: Flow rates for argon

^#Note: Flow rates for argon

Materials of Construction

• Cannister: 316L stainless steel
• Media: INX-Plus™, MigMix

Specifications

• Maximum Operating Pressure: 200 psi
• Maximum Operating temperature: 104°F (40°C)
• Cannister Inlet/Outlet:  1/4" Face Seal - Male
• Lifetime (approximate*) for (WK-500-PA): 105 cylinders
• Lifetime (approximate*) for (WK-700-PA): 147 cylinders
• Lifetime (approximate*) for (WK-2500-PA): 525 cylinders
*Based upon argon of 99.998% purity ("Pre-purified" grade) containing 3 ppm O2 and 10 ppm H2O

CAUTION! Only NANOCHEM® Weld Knight™ purifiers specifically labeled for CO₂ or O₂ applications can be used for purifying Ar/CO₂ and Ar/O₂ blends.

CAUTION! NANOCHEM® Weld Knight™ purifiers are not for use with acetylene.

Ar/CO₂ and Ar/O₂ blends are often used for GMAW (MIG) welding.  Benefits include a stable arc, easier arc initiation, reduced arc wandering, and reduced arc spatter.  For such applications, MATHESON offers Weld Knight™ purifiers containing NANOCHEM® MigMix media, specifically designed for CO₂ and O₂ blends