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Valves

Cast Iron Reflux Valve

TEST PRESSURE
Size Test Pressure Working Pressure
Of HGF / CM2 HGF / CM2
Valve Body Seat  
50 to 125 24 16 16
150 to 300 15 10 10
350 to 600 9 6 6
LEGEND
SL No Component Sl No. Component
1 Body 6 Hinge Pin
2 Cover 7 Bolts & Nut
3 Door 8 Gasket
4 Door face Disk 9 By Pass Arrangement
5 Hinge 10 Plug
DIMENSION (in mm)
Nominal Bore 50 65 80 100 125 150 200 250 300 350 400 450 500 600
Face to face 200 240 260 300 350 400 500 600 700 800 900 1000 1100 1300
Hinge Pin Dia (Min) 10 10 10 12 12 16 20 22 25 25 32 32 38 38
thickness of Flange 16 16 21 22 22.5 23 24.5 26 29 29 30 32 33 36
Flange Dia 165 185 200 220 250 285 340 395 445 505 565 615 670 780
Number of Holes 4 4 4 8 8 8 8 12 16 16 16 20 20 20
Dia of Bolt Holes 19 19 19 19 19 23 23 23 23 23 28 28 28 31
Dia of Bolt Circle 125 145 160 180 210 240 295 350 400 460 515 565 620 725
BY PASS ARRANGEMENT
Size of valve, mm 50 65 80 100 125 150 200 250 300 350 400 450 500 600
Size of-pass arrangements, Min mm 10 10 10 10 15 15 25 25 40 40 40 50 50 50
Bill of Materials
SL NO COMPONENT BASIC ALTERNATIVE
    Material Ref. To Is Grade or Designation Material Ref. to IS Grade or Designation
1 Body, Cover, Door, bearing holder and door face disc Gray cast iron 210 - 1979 FG 200 - - -
2 Hinges gray cast Iron 210 - 1979 FG 200 Cast Steel
Mild Steel		 IS:1030 - 1974
IS: 226-1975		 Fe 410 s
3 Hinge pin door pin and door Suspensions High tensile brass 320 -1980 6912 HT 2 FHTB 2 - - -
4 Bolts Carbon Steel 1363 - 1967 Class 4.6 - - -
5 Nuts, nuts for hinge pins Carbon Steel 1363 - 1967 Class4 - - -
6 Bearing bushes Leaded tin bronze 318 - 1981 LTB2 Austenitic 2749-1974 ASG M 20 Cr2
7 Body rings Leaded tin bronze 318 - 1981 LTB2 Austenitic Stainless Steel SG iron 6603-1972
1865-1974		 o4 Cr 17 Ni Mo2and o4 Cr 18 Ni 10 500/7
8 Door faces Natural rubber / synthetic rubber Specific gravity 2.20± 0.05; Shore hardness 70 + 5; ultimate tensile stength (minimum) 10 MPal - 100 kg/cm2   Leaded tin bronze 318-1981 LTB 2
9 Flange jointing material Compressed fibre board 2712-1971 C Rubber 638-1979 Type B
10 Plugs for hinge pins, air release plug Galavanized malleable - - i ) Carbon Steel
ii ) Galavanized SG iron
iii ) Leaded tin bronze		 7283-1974
1865-1974
318-1981		 -
500/7
LTB 2

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