Valves
20Pages

112 a third one for charging or manometer connection, types: – 6065 with right access connection; – 6075 with left access connection. N.B. : the third way must be equiped with a valve core (for example type 8394/A or other similar ones) to be ordered separately. The main parts of the hermetic valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body; – steel, with proper surface protection, or brass for the spindle; – chloroprene rubber (CR) and aramidic fibers for gland seal; – glass reinforced PBT for cap that covers the spindle. APPLICATIONS The...

114 CONSTRUCTION These valves are available in the following two types: – two-ways valves, 90° angle connections, types 6110 and 6120; – three-ways valves; two main connections (90° angle) plus a third one for charging, type 6132. The access connection may be shut off by the back-seating of the spindle; – two-ways valves, 120° angle connections, type 6140. The main parts of the receiver valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body; – steel, with proper surface protection, for the spindle; – chloroprene rubber (CR) and aramidic fibers for gland...

116 The main parts of the stop valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body; – brass EN 12164 – CW 614N for spindle and protection cap; – chloroprene rubber (CR) for outlet seal gaskets for series 6165 and 6175; – chloroprene rubber (CR) and aramidic fibers for gland seal, only for series 6170. APPLICATIONS The stop valves, shown in this chapter, are classified “Pressure accessories” in the sense of the Pressure Equipment Directive 97/23/EC, Article 1, Section 2.1.4 and are subject of Article 3, Section 1.3 of the same Directive. They are...

118 CONSTRUCTION Diaphragm valves don’t have gland seal. The external sealing is ensured by some thin metal discs (diaphragms), which hermetically divide the spindle chamber from the fluid flow area. The main parts of the hermetic valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body; – brass EN 12164 – CW 614N for spindle; – harmonic steel for spring; – nylon for seat sealing gaskets. APPLICATIONS The diaphragm valves, shown in this chapter, are classified “Pressure accessories” in the sense of the Pressure Equipment Directive 97/23/EC, Article 1,...

120 The main parts of the hermetic valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body; – steel, with proper surface protection, for the spindle; – chloroprene rubber (CR) and aramidic fibers for gland seal; – glass reinforced PBT for cap that covers the spindle; – steel bar EN 10277-3 11 S Mn Pb 37 for 7910 fittings; – P.T.F.E. for 7990 gaskets. APPLICATIONS The rotalock valves, shown in this chapter, are classified “Pressure accessories” in the sense of the Pressure Equipment Directive 97/23/EC, Article 1, Section 2.1.4 and are subject of Article...

122 INSTALLATION The brazing of capped valves with solder connections, type 6420, should be carried out with care, using a low melting point filler material. It‘s necessary to remove the spindle assembly, with gland too, before brazing the body. It’s important to avoid direct contact between the torch flame and the valve body, which could be damaged and compromise the proper functioning of the valve. APPLICATIONS The capped valves, shown in this chapter, are classified “Pressure accessories” in the sense of the Pressure Equipment Directive 97/23/EC, Article 1, Section 2.1.4 and are subject...

124 CONSTRUCTION These valves are available in the following two types: – 6512 with straight solder connections; – 6532 with solder angle connections; The main parts of the globe valves are made with the following materials: – hot forged brass EN 12420 – CW 617N for body, cover and cap that covers the spindle; – steel, with proper surface protection, for the spindle; – chloroprene rubber (CR) and aramidic fibers for gland seal; – metal-rubber laminated for outlet seal gaskets – P.T.F.E. for seat gaskets. APPLICATIONS The globe valves, shown in this chapter, are classified “Pressure...

126 BALL VALVES APPLICATIONS The ball valves, shown in this chapter, are classified “Pressure accessories” in the sense of the Pressure Equipment Directive 97/23/EC, Article 1, Section 2.1.4 and are subject of Article 3, Section 1.3 of the same Directive. They are designed for installation on commercial refrigerating systems and on civil and industrial conditioning plants, which use refrigerant fluids proper to the Group II (as defined in Article 9, Section 2.2 of Directive 97/23/EC and referred to in Directive 67/548/EEC). CONSTRUCTION The specific design of Castel ball valves: – ensures...

129 CONSTRUCTION The valves are equipped with: – a little flange for fixing the valve to the control panel; – a SAE-Flare connection for joining it to the copper tube; – an NPT (type 8320) or a swivel SAE FLare (8321) connection for mounting the gauge. The main parts of this valve are made with the following materials: – Hot forged brass EN 12420 – CW 617N for body; – Steel, with proper surface protection, for the spindle; – Chloroprene rubber (CR) and aramidic fibers for gland seal; – Glass reinforced PBT for cap that covers the spindle. GAUGE MOUNTING VALVES TABLE 1: General...

130 CONSTRUCTION The main parts of the piercing valve are made with the following materials: – Hot forged brass EN 12420 – CW 617N for body; – Hardened steel for the needle; – Chloroprene rubber (CR) for the outlet seal gaskets. INSTALLATION The threaded fork must be installed astride of the copper tube, the valve is fastened to the pipe by tightening the lower nut and screwing it the needle pierces the pipe. The hole, pierced by the needle, connects the pipe inlet with the SAE-Flare connection as shown in figures 1 and 2. APPLICATIONS The valve, shown in this chapter, is classified...