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Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

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Table No.- 6.2Materials for component <strong>Part</strong>s of Sluice ValveS.No. Component Preferred Material Grade orDesignationAlternative Materiali) Body, bonnet, dome, stool Grey cast iron FG 200 Spheroidal or Nodularcover, wedge, stuffingiron cast steelbox, gl<strong>and</strong>, thrust plate<strong>and</strong> cap.ii) H<strong>and</strong> wheel Grey cast iron FG 200 Mild steel cast steeliii) Stem Stainless steel 12Cr 13 04Cr18Ni 10 04Cr17 Ni 12 MO 2Nodular ironHigh Tensile BrassStainless steeliv) Wedge nut, shoe, channel Leaded tin bronze LTB-2 High TensileBrassv) Body seat ring, wedgefacing ring <strong>and</strong> bushesGrade orDesignation260-300/12 or500/2F 410 WA 230-450W 400/12HT 2FHTB 220Cr13HTB 2FHTB -2Phosphor bronzeLeaded tin bronze LTB-2 Alloy steel Gr. 1Gr. 4Gr. 1004Cr 18Ni 10vi) Bolts Carbon steel Class 4.6 Stainless steelvii) Nuts Carbon steel Class 4.0 Stainless steelvii) Gasket Rubber Type B Neoprene Rubberix) Gl<strong>and</strong> packing Jute <strong>and</strong> hemp Rubber Type Bx) Gear Spheroidalgraphite ironGr. 500/7 Alloy steel 40 Ni 2Cr M2028 Gr Bxi) Gear housing Grey cast iron FG 200 Cast steel S.G. iron 230-450 W400/12xii) Pinion & pinion shaft Wrought carbon C55 Mn 75 Alloy steel40 ni 12Cr 1 MOsteel28 04Cr18 Ni10Stainless steel6.2.3 The valve shall be marked with an arrow to show the direction of turn forclosing of the valve.6.2.4 Sluice valves are designated by nominal pressure (PN) as underNominal Pressure MPaNominal size mmPN 1.0 50 to 1200PN 1.6 50 to 6006.2.5 The dimension of the sluice valve assemblies shall be as per table 2 & 3 of IS14846. The flanges <strong>and</strong> their dimensions of drilling shall be in accordance withIS : 1538.6.2.6 Testing6.2.6.1 The test pressure <strong>and</strong> maximum working pressure for the two classes of sluicevalves shall be as tabulated below:-Table No.6.3PN rating ofvalvePN 1.0PN 1.6Test pressure, MPaBody1.52.4SeatMax. workingPressure, MPaTest Durationmin6.2.7 Coating6.2.7.1 All coatings shall be carried out after satisfactory testing of the valves prior todispatch. All the unmachined ferrous surfaces of the valve (both inside <strong>and</strong>outside) shall be thoroughly clean, dry <strong>and</strong> shall be free from rust <strong>and</strong> grease1.01.61.01.652Urban Administration & Development Department Page 65

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