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The ball valves are classified as “Pressure accessories” in the sense of the PED Directive 2014/68/EU, Article 2, paragraph 5 and are subject of Article 4, paragraph 1, letter (c), of the same Directive. All the product range is suitable for use with fluids proper to the Group 2, as defined in Article 13, paragraph 1, letter(b), of PED Directive 2014/68/EU, therefore not toxic, not inflammable and not explosive fluids; to this macro Group belongs also the refrigerant fluids listed and classified in A1 Group of Annex E of standard EN 378-1. Examples of refrigerant fluids are:
– HFC R134a, R404A, R407C, R410A, R507;
– Blends HFC/HFO R448A, R449A, R450A, R452A, R513A.
The body and the chrome-plated sphere are manufactured in hot-forged brass EN 12420 – CW617N and the solder connections are in copper tube EN 12735-1 – Cu-DHP. The TIG welding of the body and the Chloroprene rubber (CR) O-ring assembled on the spindle, assure the perfect seal of the valves, while the special modified PTFE gaskets around the ball, ensure low working torque. The design of ball valves permits the bi-directional flow of the refrigerant, the equilibrium of internal pressures when the valve is closed and prevents any risk of ejection of galvanized steel spindle. The groove is made of stainless steel.
The brazing of the valves to the system shall be done with a low melting point alloy. During this process do not point the flame directly towards the body keeping it cooled in order to avoid compromising the seal of the gaskets.