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Pneumatic Operated Ball Valve Construction of Material :- Casting Material Specifications :-
- Cast Iron : IS 210, G.R. F. G. 200
- Ductile Iron : ASTM A395
- Cast Steel : ASTM A216, G.R. WCB
- S. S. 304 : ASTM A351 CF8
- S. S. 304L : ASTM A351 CF3
- S. S. 316 : ASTM A351 CF8M
- S. S. 316L : ASTM A351 CF3M
- Alloy 20 : ASTM A351 CN7M
Design Standard :-
- Ball Valve, 2 Pieces : BS 5351, Short / Long Pattern.
- Ball Valve, 3 Pieces : BS 5351, Long Pattern.
Standard Resin Specifications :-
- PFA : ASTM D 3418
- FEP : ASTM D 2116
Service Temperature : - PFA :-
- Maximum continuous service temperature :265° C
- Melt point : 305° C
FEP :-
- Maximum continuous service temperature : 200° C
- Melt point : 260° C
Lining Thickness : -
- Minimum Lining thickness would be 3.0 mm over all wetted portion.
Chemical Inertness :-
- PFA / FEP is chemically inert to most of the all chemicals and solvents with the exception of molten alkali metals.
- PFA / FEP lined valves are used to convey, and are inert to, these chemicals : All acids including hydrofluoric, sulphuric and aqua regia, all caustic, all chlorides organic and inorganic, all solvents, all bleach solutions, all peroxides, all phenols and any combinations of above materials.
- Combined with the chemical inertness of PFA / FEP is its unique non-stick property. Thus a PFA / FEP lined products eliminate or minimize the built up of deposits of the products which otherwise reduce flow and affect processing operations.
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