NON RETURN VALVES-SWING type                   Vaico's non – return valves swing type are produced according to BS 5153 from either ductile iron or grey cast iron. They can be equipped with counter weight or a hydraulic damper upon request. Also, they can be mounted vertically or horizontally in pipelines.                 TABLE NO.1     DN L D D1 D2 H Z-D Z-D PN10 PN16 PN10 PN16 PN10 PN16 300 698 455 455 400 410 370 390 12_23 12_28 400 914 565 580 515 525 480 465 16-28 16-31 500 978 670 715 620 650 582 532 20-28 20-34 600 1295 780 840 725 770 682 619 20-31 20-37 800 1500 1015 1025 950 950 901 810 24-34 24-40               TABLE NO.2     ITEM DESCRIPTION MATERIAL 1 Body Ductile Iron -Grey cast iron 2 Cover Ductile Iron -Grey cast iron 3 Rocker Shaft Stainless steel 4 Body Seal Rings Bronze 5 Disk Seal Rings NBR orBronze 6 Disk Ductile Iron -Grey cast iron 7 Rocker Ductile Cast iron 8 Pin Stainless steel 9 Gasket NBR 10 Bolts steel         TABLE NO.3     TESTING AND WORKING CONDITIONS Nominal Diameter 300 - 1200 DN(mm) Working Pressure 10 - 16 (bar) Shell Testing Pressure 16 - 24 (bar) Seal Testing Pressure 11 - 17.6 (bar) Max MediaTemperature Suitable Media Water/ Sewage