The Belimo B253 is a 2 in. 2-way characterized control valve (CCV) with a stainless steel ball and stem, Cv 120 and NPT female connections. It is sold as a valve only, for use with a separately purchased Belimo actuator.
A stainless steel characterized disc gives the valve an equal percentage flow characteristic. Rated 400 psi body pressure and 200 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.
Pressure Ratings
400 psi body pressure rating, 200 psi close-off pressure.
Ball and Stem
Stainless steel ball, stainless steel stem, PTFE seat.
ZOT Supply is an authorized distributor of Belimo products.
Technical Specifications
| Valve: Belimo B253 | |
|---|---|
| Valve Size | 2" [50] |
| Fluid | chilled or hot water, up to 60% glycol |
| Fluid Temperature Range | 0...250°F [-18...120°C] |
| Body Pressure Rating | 400 psi |
| Close-Off Pressure (∆ps) | 200 psi |
| Flow Characteristic | equal percentage |
| Leakage Rate | 0% for A–AB |
| Pipe Connection | Internal thread NPT (female) |
| Servicing | maintenance-free |
| Flow Pattern | 2-way |
| Controllable Flow Range | 75° |
| Cv | 120 |
| Valve Body | Nickel-plated brass body |
| 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 | 240 GPM |
| Valve Weight | 5.4 lb [2.4 kg] |
| Compatible Belimo Actuator Families | |
|---|---|
| Non Fail-Safe Actuators | ARB(X) ARQB(X) ARB(X) N4 |
| Spring Actuators | AFRB(X) |
Documentation
Belimo B253 Technical Data SheetCCV Installation InstructionsCharacterized Control Valve (CCV) Technical DocumentationCCV Accessories 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 B253?
The B253 valve is rated Cv 120. At a 4 psi pressure drop it passes 240 GPM of water.
What size and pipe connection does the B253 use?
2 in. (2" [50]) with internal thread NPT (female) connections.
Does the B253 include an actuator?
No. The B253 is the valve only. Compatible Belimo actuator families: Non Fail-Safe: ARB(X) ARQB(X) ARB(X) N4; Spring: AFRB(X).
What warranty does the B253 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 B253?
200 psi close-off pressure, with a 400 psi body pressure rating.
What fluids can the B253 control?
Chilled or hot water, up to 60% glycol, fluid temperature range 0...250°F [-18...120°C].
Specifications per Belimo B253 technical data sheet (2026-02-07); 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 Inch
- CV Rating:
- 120
- GPM:
- 240 @ 4 psi
- Material:
- Stainless Steel
- Actuator Type:
- Valve Only
