R538 - 3-way control ball valve, PN16

On request
£194.00 £232.80

R523 - 3-way control ball valve, PN16

•    external thread G 1 1/2", DN 25, kvs 10
•    Housing nickel-plated, hot-pressed brass
•    Valve disk stainless steel
•    Seal PTFE / EPDM O-ring
•    Characterizing disk TEFZEL
•    Temperature of medium max. 100 °C
•    Characteristic A-AB equal percentage
•    Characteristic B-AB linear, 70% of kvs 
•    Leakage rate A-AB air bubble-tigh
•    Leakage rate B-AB 1...2% of kvs

More Information



  • Mode of operation The characterized control valve is operated by a rotary actuator. The actuator is controlled by a standard modulating or 3-point control system and move the ball of the valve – the throttling device – to the opening position dictated by the control signal. Open the ball valve counterclockwise and close it clockwise.

  • Flow characteristic Equal-percentage characteristic of the flow rate ensured by the integral characterizing disc. 

Manuals & Datasheets
Technical Information

•     Functional data Flow media Cold and hot water, water with max. 50% volume of glycol
•     Temperature of medium +5°C ... +110°C 1), (lower or higher temperatures on request)
•     Rated pressure ps see «Type overview»
•     Flow characteristic Control path A – AB: equal percentage (to VDI/VDE 2173), n(gl): see «Type overview» Bypass B – AB: linear, flow rate is 70% of kvs value
•     Rangeability Sv See «Type overview»
•     Leakage rate Control path A – AB: Air bubble-tight (BO 1, DIN3230 T3) Bypass B – AB: Approx. 1...2% of kvs value (in relation to the highest value within the DN (e.g. R513)
•     Pipe connector External thread to ISO 228/1
•     Differential pressure Δpmax 350 kPa (200 kPa for low-noise operation), Closing pressure Δps 1400 kPa
•     Angle of rotation 90°<) (Operating range of control path A – AB 15 ... 90°<), bypass B – AB 15 ... 70°<)
•     Installation position Upright to horizontal (in relation to the stem)
•     Maintenance Maintenance-free
•     Materials Fitting Forged, nickel-plated brass body
•     Valve cone and stem Stainless steel
•     Stem seal O-Ring, EPDM
•     Ball seat PTFE, O-Ring Viton
•     Characterizing disk TEFZEL
•     Dimensions / Weights see «Dimensions and weights», page 3
•     Motorizing see the complete overview of water solutions
•     1)The allowed media temperature can be limited, depending on the type of actuator. The correct values can be found in the corresponding actuator data sheets.


Manufacturer Belimo