Description
For Closed Cold and Warm Water Systems, this is Ideal for switching functions and 2-point controls on the water side of air-handling units and heating systems.
Functional Data
- Fluid: Cold and warm water, water with glycol up to max. 50% vol.
- Fluid Temperature: -10...120°C [14...248°F]
- Note: At a fluid temperature of -10...2°C, a spindle heater or a valve neck extension is recommended. The allowed fluid temperature can be limited depending on the type of actuator. Limitations can be found in the actuators' respective data sheets.
- Close-off Pressure: 1400 kPa
- Differential Pressure Δpmax: 1000 kPa
- Note: 200 kPa for low-noise operation
- Flow Bypass B – AB: Approx. 50% of Kvs value
- Leakage Rate:
- Port A – AB: Air-bubble tight, leakage rate A (EN 12266-1)
- Bypass B – AB: Leakage class I (EN 1349 and EN 60534-4), max. 1% of the Kvs value
- Angle of Rotation: 90°
- Pipe Connection: Internal thread according to ISO 7-1
- Installation Orientation: Upright to horizontal (in relation to the stem)
- Servicing: Maintenance-free
- Air-bubble tight (control path A – AB)
Materials
- Valve Body: Nickel-plated brass body
- Body Finish: Nickel-plated
- Closing Element: Stainless steel
- Spindle: Stainless steel
- Spindle Seal: EPDM O-ring
Electrical Accessories
- Stem Heater DN 15...50 (20 W): ZR24-2
Mechanical Accessories
- Valve Neck Extension for Ball Valve DN 15...50: ZR-EXT-01
- Pipe Connectors:
- DN 15 Rp 1/2": ZR2315
- DN 20 Rp 3/4": ZR2320
- DN 25 Rp 1": ZR2325
- DN 32 Rp 1 1/4": ZR2332
- DN 40 Rp 1 1/2": ZR2340
- DN 50 Rp 2": ZR2350
Installation Notes
- Permissible Installation Orientation: The ball valve can be installed upright to horizontal. It may not be installed in a hanging position (spindle pointing downwards).
- Water Quality Requirements: Must adhere to VDI 2035 specifications. To ensure long-term functionality, valves must be kept free from particle debris. Installing a suitable strainer is recommended.
- Servicing: Maintenance-free ball valves and rotary actuators. Isolate the rotary actuator from the power supply before service work. Switch off pumps in the piping system, close slide valves, and ensure system pressure is reduced to ambient levels. Return the system to service only after proper reassembly and refilling by trained personnel.
- Flow Direction: Comply with the specified direction of flow indicated by an arrow on the housing to prevent valve damage. Ensure the ball is correctly positioned (marking on the spindle).
Our website offers all Belimo products. For more information and to explore our range, visit our website at https://ecospares.co.uk/collections/belimo. If you need any assistance, please call us on 01772 284 626.