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G. Where indicated on the Drawings or necessary due to location, size, or inaccessibility, chain wheel operators shall be furnished with the valves. Such operators shall be designed with adequate strength for the valves with which they are supplied and to provide for easy operation of the valve. Chains for valve operators shall be galvanized. Gate valves shall be as manufactured by the Mueller Company, Clow Valve Company or equal. H. Where required, gate valves shall be provided with a box cast in the slab and a box cover. Length of box shall be slab thickness. Box cover opening shall be for valve stem and nut. Valve wrenches and extension stems shall be provided by the manufacturer to actuate the valves. The floor box and cover shall be equal to those manufactured by Rodney Hunt Machine Company or Clow Corporation. Gate valves for diesel fuel service shall have API approval. Bodies shall be cast iron or bronze. 2.03 PLUG VALVES A. Plug valves shall be non-lubricated eccentric type with resilient faced plugs, and shall be furnished with end connections as shown on the plans. Flanged valves shall be faced and drilled to the ANSI B16.1 Class 125 standard. Mechanical joint ends shall be AWWA C111. Bell ends shall be to the AWWA C100 Class B. B. Port areas for valves shall be min. 80% of full pipe area. C. Valve bodies shall be of ASTM A126 Class B cast iron in compliance with AWWA Standard C507-73 Section 5.1 and AWWA Standard C504-80. All exposed nuts, bolts, springs, washers, etc. shall be zinc plated. Resilient plug facings shall be of Neoprene or Hycar on a single piece plug. The plug shall be of sufficient construction so that no strengthening member is required opposite the face. D. Valves shall be furnished with corrosion resistant seats which comply with AWWA Standard C507 Section 7 paragraph 7.2 and with AWWA Standard C504 Section 3.5. The seat shall be in the body only. Seat ring shall be adjustable and replaceable. E. Valves shall be furnished with replaceable, sleeve-type bearings in the upper and lower journals. These bearings shall comply with AWWA Standard C507-73 Section 8 paragraphs 8.1, 8.3 and 8.5 and with AWWA Standard C504 Section 3.6. F. Valve shaft seals or packing shall be adjustable and replaceable without removing the valve from service or interrupting service with flow in either direction. Shaft seals shall comply with AWWA Standard C507-73 Section 10 and with AWWA C507-70 Section 111. G. Valve pressure ratings shall be as follows and shall be established by hydrostatic tests as specified by ANSI Standard B16.1. Pressure ratings shall be 175 psi for valves through 12", 150 psi for valves in sizes 14" through 36" and 125 psi for 08/12 15100-3 11-4179