Harris HP 721C Specialty Gas Co2 Regulator - 721C-250-320-B - 721C250320B Hard Hat Adapters Cellulosic and rutile coatings are

Cellulosic and rutile coatings are not low-hydrogen and do not require the rebake discipline of E7018-class electrodes

WARNING T13086-237 - 9ST13086-237

causing brittle welds

and its fully enclosed

5FT) SUPP S31226-313 - 9SS31226-313

Harris HP 721C Specialty Gas Co2 Regulator - 721C-250-320-B - 721C250320B Hard Hat Adapters Cellulosic and rutile coatings areHarris Two Stage Ultra High Purity Brass Barstock Regulator Model 721C 250 320 B 721C250320B Features 1 11 16" 316L Stainless Steel diaphragm eliminates contamination from diffusion or outgassing One piece encapsulated seat design with 10 micron sintered internal filter to protect the PTFE Teflon seat from particulate contamination External relief valve is standard Brass Barstock body, bonnet and fittings 2 dual scale Brass Barstock gauges (psi bar)