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Precision Ball Check 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 :-
- BS 5351, Short Pattern / As per manufacturer std.
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.
PFA / FEP Lined Ball Check Valves Finish :-
- The interior surface of all valves are clean and free of mold burrs, rust, scale or others that may adversely affect the performance of lining.
- The exterior surface of all valve bodies are be cleaned by sand / shot blasting and painted by 1 coat of Epoxy primer and 2 coats of Polyurethane Top coat.
Products Inspection and Testing :-
Hydrostatic Pressure :-
- Body Test : 10 Kg/Cm2
- Seat Test : 10 Kg/Cm2
- (Hydrostatic pressure at room temperature using clean water.)
Electrostatic Pressure :-
- Non-destructive high-voltage test at an output voltage of 10,000 V. When electric contact is made, a visible/ audible spark or both occur at the probe if there is any defect in lining.
Visual Inspection :-
- All surfaces are free from blister, porosity or any other defect. All checks / tests are conducted before shipment.
Storage & Transport :-
- Each end of valve is protected by specially made rubber cap so that products are capable to withstand normal handling during transport.
- All the materials are supplied with export wooden case or card box packing depending upon the weight and mode of shipment.
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