B212+LF24-SR US 1/2 in. 2-Way CCV with Spring Return Actuator, 24 VAC/DC, 2-10V
Equal percentage ball valve for chilled or hot water, up to 60% glycol, with modulating 2-10 VDC control. Fail position (open or closed) is set at the factory; state it when ordering. No manual override.
Key Features
- Cv: 3
- Close-off: 200 psi
- Control: 2-10 VDC, 2-10 VDC feedback
- Torque: 35 lb-in
Product Specifications
| Manufacturer | Belimo |
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| Model | B212LF24SRUS (B212+LF24-SR US) |
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| Valve | B212 |
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| Valve size | 0.5" (15) |
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| Fluid | chilled or hot water, up to 60% glycol |
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| Fluid Temp Range (water) | 0 to 250 deg F (-18 to 120 deg C) |
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| Body Pressure Rating | 600 psi |
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| Close-off pressure | 200 psi |
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| Flow characteristic | equal percentage |
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| Leakage rate | 0% for A–AB |
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| Pipe connection | Internal thread NPT (female) |
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| Servicing | maintenance-free |
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| Flow Pattern | 2-way |
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| Controllable flow range | 75 deg |
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| Cv | 3 |
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| Valve body | Nickel-plated brass body |
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| Stem | stainless steel |
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| Stem seal | EPDM (lubricated) |
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| Seat | PTFE |
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| Characterized disc | TEFZEL |
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| O-ring | EPDM (lubricated) |
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| Ball | stainless steel |
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| Suitable actuators, non-spring return | TR LRB(X) LRQB(X) NRB(X) N4 |
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| Suitable actuators, spring return | TFRB(X) LF |
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Actuator: LF24-SR US
| Nominal voltage | AC/DC 24 V |
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| Nominal voltage frequency | 50/60 Hz |
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| Nominal voltage range | AC 19.2 to 28.8 V / DC 21.6 to 35.0 V |
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| Power consumption in operation | 2W |
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| Power consumption in rest position | 0.8 W |
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| Transformer sizing | 3.5 VA |
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| Connection supply/control | cable 3 ft. (1 m), 4x 0.75 mm2 |
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| Parallel operation | Yes (note the performance data) |
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| Communicative control | MP-Bus |
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| Number of nodes | MP-Bus max. 16 |
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| Torque | 35 lb-in (4 Nm) |
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| Torque Fail-Safe | 4 Nm |
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| Operating range Y | 2 to 10 V |
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| Input impedance | 100 kΩ |
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| Operating range Y variable | Start point 0.5 to 30 V End point 2.5 to 32 V |
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| Operating modes optional | variable (VDC, on/off, floating point) |
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| Position feedback U | 2 to 10 V |
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| Position feedback U note | Max. 1 mA |
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| Position feedback U variable | Start point 0.5 to 8 V End point 2.5 to 10 V |
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| Position accuracy | +/-5% |
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| Direction of motion motor | selectable with switch L/R |
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| Direction of motion variable | electronically reversible |
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| Direction of motion fail-safe | selectable by mounting L/R |
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| Manual override | No |
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| Angle of rotation | Max. 95 deg |
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| Angle of rotation note | Adjustable 37 to 100% with integrated mechanical limitation |
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| Running time (motor) | 150 s / 90 deg |
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| Running time motor variable | 75 to 300 s |
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| Running time fail-safe | <20 s @ -20 to 50 deg C, <60 s @ -30 deg C |
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| Sound power level, motor | 36 dB(A) |
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| Adaptation Setting Range | with Belimo Assistant 2 |
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| Override control | MIN (minimum position) = 0% MID (intermediate position, AC only) = 50% MAX (maximum position) = 100% |
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| Override control variable | MIN = 0%...(MAX – 32%) MID = MIN...MAX MAX = (MIN + 32%)...100% |
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| Mechanical interface | Universal shaft clamp 8 to 16 mm |
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| Position indication | Mechanical |
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| Service life | Min. 60'000 fail-safe positions |
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| Power source UL | Class 2 Supply |
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| Degree of protection NEMA/UL | NEMA 2 |
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| Housing | UL Enclosure Type 2 |
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| Agency Listing | cULus acc. To UL 873 and CAN/CSA C22.2 No. 24-93 |
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| Quality Standard | ISO 9001 |
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| UL 2043 Compliant | Suitable for use in air plenums per Section 300.22(C) of the NEC and Section 602 of the IMC |
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| Ambient humidity | Max. 95% RH, non-condensing |
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| Ambient temperature | -22 to 122 deg F (-30 to 50 deg C) |
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| Storage temperature | -40 to 176 deg F (-40 to 80 deg C) |
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| Servicing | maintenance-free |
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| Weight | 3.2 lb (1.5 kg) |
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