1. Type: a. Offset disc type b. Non-lubricated c. Serviceable (able to be repacked) under full line pressure d. Eccentric. e. Capable of sealing in both directions at the rated pressure f. Unobstructed flow path when open g. Drop tight shut-off to the full valve rating with pressure on either side of the plug. 2. Body: a. 30,000-psi tensile strength b. Top entry, bolted bonnet c. Body shall be cast with integral connections conforming to connecting piping 3. Plug: a. To be removable without removing the valve from the line. b. To have an integral upper and lower shaft: 1) seals on the upper and lower journals to prevent entrance of solids into the journals. c. One piece for all valves. 4. Bearings: a. Permanently lubricated 5. Minimum Working Pressure: a. 175 psig for sizes 4-inch to 12-inch (inclusive) and 150 psi for sized 14-inch and larger. b. At the above rated minimum working pressures, certified by the manufacturer as permitting zero leakage for a 5-minute duration with full pressure applied in either direction. 6. Maximum Process Fluid Temperature: 80 deg. F 7. Ports: a. Configuration: Rectangular or Round. b. Minimum Port Area: 100 percent of nominal pipe area (full port)...
