Example: air traffic controller
TECHNICAL SPECIFICATIONS : FIRE FIGHTING
The body shall be of cast iron to IS:210 in circular shape and of high strength to take the water pressure. The disc shall be heavy duty stainless steel to IS 3444 Gr.6 The valve seat shall be of high grade elastomer or nitrile rubber. The valve is closed position shall have complete contact between the seat and the disc throughout the perimeter.
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