The globe 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 function of the globe valves is to intercept the fluid flow.
The body and the flange are made of hot forged brass EN 12420 – CW617 and the seal between them is ensured in some models with an asbestos-free aramid fiber gasket DIN-DVGW approved in accordance with DIN 3535, part 6 FA, in other models with HNBR gasket. The interception rod is in galvanized steel at the end of which there is the modified PTFE gasket which ensures excellent sealing.
While installing the valve, make sure the arrow direction matches the direction of flow; furthermore, it is necessary to disassemble all the removable components from the valve and if the gasket does not remain on the cover, remove it manually from the body. 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 and allow the latter to cool by natural convection in the air.