FOOT VALVE IS 4038

Size : 25 to 450MM

Scope

 A foot valve is generally placed at the lower end of the suction pipe of a centrifugal pump to prevent the suction pipe from emptying while the pump is at rest; consequently, when the pump is first started it does not have to exhaust the air from the suction pipe with the result that prompt starting of the pump is secured. Foot valve is particularly use- ful when the suction lift or vertical height of the pipe is considerable.

Material Table & Components

Materials for Valve Components
Sl. No. Component Part Material Conforming To Grade
i) Housing, seat discs and disc plates Grey cast iron IS : 210-1978* FG 200
ii) Hinge pins and disc guide a) High tensile bars
b) Stainless steel
IS : 320-1980†
IS : 6603-1972‡
HT 2
04CrNi10
iii) Strainers a) Grey cast iron
b) Galvanized steel
IS : 210-1978*
IS : 277-1985§
FG 200
iv) Disc faces Vegetable tanned leather (Thickness 3 mm, Min) IS : 581-1976||
Leaded tin bronze IS : 318-1981¶ LTB 2
Natural rubber (with reinforcement of cotton canvas) IS : 5192-1975** Grade 1, Type B
Synthetic rubber (with reinforcement of cotton canvas) IS : 7450-1974‡‡ Grade 1
v) Flange jointing nature a) Compressed fibre board or rubber of thickness 1.5 mm, Min.
The fibreboard shall be impregnated with chemically neutral oil and shall have a smooth and hard surface.
IS : 638-1979†† Type B
b) Compressed asbestos fibre IS : 2712-1979§§ Grade W/3