The Belimo B6250S-070+AFRXUP-S N4 is a 2-1/2 in. 2-way characterized control valve (CCV), Cv 70, with a stainless steel ball and stem, assembled with the Belimo AFRXUP-S N4 spring-return fail-safe actuator for on/off control on a 24-240 VAC / 24-125 VDC supply.
A stainless steel characterized disc gives the valve an equal percentage flow characteristic. Rated ANSI Class 125, standard class B body pressure and 175 psi close-off, for chilled or hot water, up to 60% glycol from 0...250°F [-18...120°C].
Best For
- Heating and cooling coils in air handling units
- Fan coil unit heating and cooling coils
- Unit ventilators
- VAV box reheat coils
- Bypass loops
- Hydronic systems with variable flow
Warranty
This Belimo characterized control valve product carries a 5-year warranty on all components from the date of production, with the first two years unconditional.
Key Features
Characterized Disc
Stainless steel disc produces an equal percentage flow characteristic.
Spring-Return Fail-Safe
AFRXUP-S N4 is a spring-return fail-safe actuator: fail-safe direction reversible with cw/ccw mounting; fail-safe running time <20 s.
On/Off Control
AFRXUP-S N4 accepts on/off control.
Auxiliary Switch
2x SPDT, 1 mA...3 A (0.5 A inductive), DC 5 V...AC 250 V, 1x 10% / 1x 11...90%.
NEMA 4X Housing
Degree of protection NEMA 4X.
Pressure Ratings
ANSI Class 125, standard class B body pressure rating, 175 psi close-off pressure.
ZOT Supply is an authorized distributor of Belimo products.
Technical Specifications
| Valve: Belimo B6250S-070 | |
|---|---|
| Valve Size | 2.5" [65] |
| Fluid | chilled or hot water, up to 60% glycol |
| Fluid Temperature Range | 0...250°F [-18...120°C] |
| Body Pressure Rating | ANSI Class 125, standard class B |
| Close-Off Pressure (∆ps) | 175 psi |
| Flow Characteristic | equal percentage |
| Leakage Rate | 0% for A–AB |
| Pipe Connection | Flange for use with ASME/ANSI class 125 |
| Servicing | maintenance-free |
| Flow Pattern | 2-way |
| Controllable Flow Range | 75° |
| Cv | 70 |
| Valve Body | Cast iron - GG 25 |
| Stem | stainless steel |
| Stem Seal | EPDM (lubricated) |
| Seat | PTFE |
| Characterized Disc | Stainless steel |
| O-ring | EPDM (lubricated) |
| Ball | stainless steel |
| Flow Rate @ 4 psi Pressure Drop | 140 GPM |
| Valve Weight | 25 lb [11 kg] |
| Actuator: Belimo AFRXUP-S N4 | |
|---|---|
| Nominal voltage | AC 24...240 V / DC 24...125 V |
| Nominal voltage frequency | 50/60 Hz |
| Nominal voltage range | AC 19.2...264 V / DC 21.6...137.5 V |
| Power consumption in operation | 7W |
| Power consumption in rest position | 3.5 W |
| Auxiliary switch | 2x SPDT, 1 mA...3 A (0.5 A inductive), DC 5 V...AC 250 V, 1x 10% / 1x 11...90% |
| Switching capacity auxiliary switch | 1 mA...3 A (0.5 A inductive), DC 5 V...AC 250 V |
| Overload Protection | electronic throughout 0...95° rotation |
| Direction of motion motor | selectable by ccw/cw mounting |
| Direction of motion fail-safe | reversible with cw/ccw mounting |
| Manual override | 5 mm hex crank (3/16" Allen), supplied |
| Angle of rotation | 90° |
| Running Time (Motor) | 75 s / 90° |
| Running time fail-safe | <20 s |
| Sound power level motor | 45 dB(A) |
| Sound power level, fail-safe | 62 dB(A) |
| Position indication | Mechanical |
| Power Source (UL) | Class 2 Supply |
| Degree of Protection (NEMA/UL) | NEMA 4X |
| Housing | UL Enclosure Type 4X |
| Agency Listing | cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2014/30/EU and 2014/35/EU |
| Quality Standard | ISO 9001 |
| Ambient humidity | Max. 100% RH |
| Ambient temperature | -22...122°F [-30...50°C] |
| Ambient temperature note | -40...122°F [-40...50°C] for actuator with integrated heating |
| Storage temperature | -40...176°F [-40...80°C] |
| Servicing | maintenance-free |
| Housing material | Die cast aluminium and plastic casing |
| Actuator Weight | 10 lb [4.5 kg] |
Documentation
Belimo B6250S-070+AFRXUP-S N4 Technical Data Sheet (Valve + Actuator)Belimo N4 Heater Add-on 230V -Y Technical Data SheetCCV 4-Pin Removal Installation InstructionsCharacterized Control Valve (CCV) Technical DocumentationElectronic Valve Applications GuideBelimo Ball Valve Master FormatSuccess Story: Habitat for Humanity Home with Belimo CCVSuccess Story: New York PostSuccess Story: Sonoma State University RenovationSuccess Story: Western Wyoming Community CollegeFrequently Asked Questions
What is the Cv of the Belimo B6250S-070+AFRXUP-S N4?
The B6250S-070 valve is rated Cv 70. At a 4 psi pressure drop it passes 140 GPM of water.
What size and pipe connection does the B6250S-070+AFRXUP-S N4 use?
2-1/2 in. (2.5" [65]) with flange for use with ASME/ANSI class 125 connections.
Is the B6250S-070+AFRXUP-S N4 fail-safe?
Yes. The AFRXUP-S N4 is a spring-return fail-safe actuator. Fail-safe running time: <20 s.
What control signal does the B6250S-070+AFRXUP-S N4 accept?
The AFRXUP-S N4 accepts on/off control.
What power supply does the B6250S-070+AFRXUP-S N4 need?
Nominal voltage AC 24...240 V / DC 24...125 V.
What warranty does the B6250S-070+AFRXUP-S N4 have?
A Belimo 5-year warranty on all components from the date of production, with the first two years unconditional.
What is the close-off pressure of the B6250S-070+AFRXUP-S N4?
175 psi close-off pressure, with an ANSI Class 125, standard class B body pressure rating.
What fluids can the B6250S-070+AFRXUP-S N4 control?
Chilled or hot water, up to 60% glycol, fluid temperature range 0...250°F [-18...120°C].
Specifications per Belimo B6250S-070 technical data sheet (2026-02-07) and Belimo AFRXUP-S N4 technical data sheet (2026-08-18); flow rate per Belimo CCV Technical Documentation (P10419 - 09/13); warranty per Belimo CCV Master Format, Section 230923.11. Content updated November 2026.
- Valve Pattern:
- 2-Way
- Valve Size:
- 2-1/2 Inch
- CV Rating:
- 70
- GPM:
- 140 @ 4 psi
- Material:
- Stainless Steel
- Actuator Type:
- Fail-Safe
- Voltage:
- 24 to 240 VAC / 24 to 125 VDC
- Control Signal:
- On/Off
- Auxillary Switch:
- Yes
- Enclosure:
- NEMA 4X
