(Sample specification for the convenience of Engineers, Architects, and Contractors in writing valve specifications)
"Valves are to be of the lubricated plug type, without taper, and with close tolerance between the plug and body sealing surfaces. Valves are to have a stem seal of reinforced Teflon1. Valves must have a leak-proof, spring loaded ball and lubricant sealed check valve; and combination lubricant screw and button head fitting to prevent foreign matter from being forced into lubricant system. Valve plugs are to be floated on low-friction Teflon1 surfaces for extra ease of turning - the lower surface to also act as a means of minimizing torsional stress in the spring - and are to have port area equal to 100% of the area of standard pipe (or standard opening if desired). Valves are to be so constructed that lubricant system has sufficient pressure to force lubricant over all seating surfaces. Extruded Lubricant around stem is to be positive indication that lubricant system is full, and that there had been a minimum contamination of line fluids. Valves are for use on lines handling ___________________(fluid) at _______oF temperatures, and ____________# pressure; and are to be as manufactured by Homestead® Valve Division of Olson Technologies, Inc.
Note: Please be sure to include with the specification, quantity, size, and figure number of each type of valve; the number and type of wrenches desired; and a sufficient supply of lubricant for the various sized valves, and for different fluids or service conditions.
INFORMATION NEEDED ON ORDER
Your local "Homestead®" distributor is willing and well equipped to help solve your valve problems. he carries a stock of popular sizes and types of Homestead® Lubricated Plug Valves to meet your immediate needs. Order by figure number, and please be sure to give all necessary facts, such as: pipe size, fluid, pressure, temperature, number of wrenches, extra lubricant, etc., on order.
1 Teflon® Dupont Co.