In the new Department of Labor Safety Regulations for Construction, it states in the Federal Register, Volume 36, Number 75, that “all hoses exceeding 1/2 inch inside diameter shall have a safety device at the source of supply or branch line to reduce pressure in case of hose failure.”
The “Velocity Fuses” shown below left now enable you to meet these requirements. They are specifically designed for use on compressed air lines loading to pneumatic tools These valves protect personnel from dangerous whipping air hoses caused by a suddenly disconnected coupling or severed air hose while the line is under pressure.
The valve automatically slams shut when the flow of air exceeds the setting of the valve. A tiny orifice or “bleed hole” allows enough air through the valve to equalize pressure. After repairs are made and air pressure is back to normal flow, the valve automatically re-opens to allow full flow and afford the same protection again The velocity fuses referred to above in sizes 1″ and larger are also suitable for steam operation.
The velocity fuse is a product of the REGO Division of Golconda Corporation, 4201 West Peterson Avenue, Chicago, Illinois 60646. They are available from REGO and/or their distributors throughout the country.
Note: this tip has taken something of a “life of its own” since it is one of the few references to compressed air velocity fuses on the net.