Product description The strength of the metering Ball Valve Type 523 Pro is its ability to reliably control flow even at very low flowrates. The easy to read indicator and uniquely notched ball make precisely controlling media possible. • Chemical process • Life science • Water treatment • Food & beverage • Fine adjustment of the dosage by special V-notch ball • Opening angle scaled in 0° - 180° on the index plate • Specially designed for flow control • True union for easy installation and removal • Lockable lever equipped as standard • Ergonomic hand lever with integrated tool to open the union bushing • Labeling in lever (optional) • Integrated fixation system with mounted threaded inserts as standard • Spacers keep the level of the piping system constant and simplify installation • Unique Data Matrix Code for traceability Neutral and aggressive media with a small amount of particles/solids. The chemical resistance is dependent on the selected valve material (see online tool ChemRes PLUS). GF Piping Systems - Industrial Piping Systems

Union nut Connecting part Union seal Union bush Body seal Backing seal Ball seat Ball (metering version) Stem Stem seals Body Index plate Screws Adapter with locking function Position indicator Lever (lockable) Lever clip Seal materials Rated pressure Actuation variants Connections Product standard Test standard Approvals Valve body_ _PVC-U, PVC-C, PP-H, PVDF Ball seat PTFE Manually operated Fusion / solvent cement sockets ISO, ASTM, JIS, BS Fusion / solvent cement spigots ISO Backing flange _ISO, ANSI, BS, JIS Butt fusion spigots ISO +GF+ GF Piping Systems - Industrial Piping Systems (10/2023)...

The kv values for each intermediate valve position can be determined by using the flow value characteristics and the kv 100 values. Opening angle (%) Kv, Cv value (%) Pressure-temperature diagrams The following pressure-temperature diagrams are based on a service life of 25 years and water or similar media. Temperature (°C, °F) Permissible pressure (bar, psi) GF Piping Systems – Industrial Piping Systems (10/2023)

Flow rate (l/min, US gal/min) Pressure loss Δp (bar, psi) GF Piping Systems – Industrial Piping Systems (10/2023) Nominal diameter DN (mm, inch) Y Tightening torque (Nm, lb-ft) Average values at nominal pressure. Depending on the application (e.g. operating speed, fluid, temperature, etc.) about 2 times the operating torque should be taken for sizing actuator

• With the backing seals, the ball has a floating position. This results in preloading and hence a constant seal. Stem, backing, housing and connection seals are made of EPDM or FKM. • The stems with rated break point above the upper O-ring help prevent leaks to the outside in case of damage. • The design of the hand lever serves as a tool for installing the screw-in fitting. Screw-in fittings have a reverse thread in order to avoid unintentional opening when removing the coupling nuts or the thread connections. All ball valves in DN10–15 are true union according to EN ISO 16135 for simple installation...

Valve handling Installation notes When installing the ball valve, ensure that it is always installed into the system in an opened ball position. Selection of lubricant All seals should be lubricated with a silicone-based grease. Using the wrong lubricants can damage the material of the ball valve or seals. • Mineral oil-based and Vaseline (petrolatum) are not appropriate. • For silicon-free ball valves, please consult the special manufacturer‘s instructions. Maintenance notes Ball valves require no maintenance under normal operating conditions (clear water). However, the following measures must...

Metering Ball Valve Type 523 Pro with solvent cement sockets Metering Ball Valve Type 523 Pro with fusion sockets, metric Metering Ball Valve Type 523 Pro with solvent cement spigots or socket fusion spigots, metric +GF+ GF Piping Systems - Industrial Piping Systems (10/2023)

Metering Ball Valve Type 523 Pro with butt fusion spigots short, metric Metering Ball Valve Type 523 Pro with threaded sockets, Rp Metering Ball Valve Type 523 Pro with threaded sockets, NPT +GF+ GF Piping Systems - Industrial Piping Systems (10/2023)

Angetriebene Versionen Metrische Kugelhähne vom Typ 523 Pro sind als elektrisch und pneumatisch angetriebene Versionen erhältlich. Für Abmessungen siehe Kugelhahn Typ 546 Pro. For further information on accessories, refer to the online product catalogue at www.gfps.com Mobile apps and online tools to support configuration and calculation at www.gfps.com/tools The information and technical data (altogether “Data”) herein are not binding, unless explicitly confirmed in writing. The Data neither constitutes any expressed, implied or warranted characteristics, nor guaranteed properties or a guaranteed...