The Siemens 254-01121 is a complete 2-way, normally open valve assembly engineered for precise hydronic and HVAC control applications. Combining a forged brass valve body with brass trim and a non-spring return floating actuator, this factory-matched assembly delivers reliable, repeatable performance in commercial building automation systems.
Product Overview
Designed for use in heating and cooling coil applications, the 254-01121 features equal percentage flow characteristics that provide smooth, stable modulation across the full stroke of the valve. The non-spring return floating actuator responds to 24Vac control signals, making it compatible with a wide range of building automation and DDC controllers. The normally open (N/O) configuration ensures flow is maintained in the event of a power interruption.
Key Features
- Complete valve and actuator assembly — factory matched for optimal performance
- 2-way, normally open (N/O) configuration
- 1/2″ NPT end connections for easy installation into standard piping systems
- 24Vac actuator voltage for compatibility with most BAS and DDC controllers
- 1.6 Cv flow coefficient for accurate flow capacity sizing
- Equal percentage flow characteristic for stable, linear control response
- Forged brass body with brass trim for durability and corrosion resistance
- Non-spring return floating actuator — no spring return mechanism required
Specifications
- SKU: 254-01121
- Brand: Siemens Building Technology
- Valve Configuration: 2-Way, Normally Open (N/O)
- Connection Size: 1/2″ NPT
- Actuator Voltage: 24Vac
- Flow Coefficient (Cv): 1.6
- Flow Characteristic: Equal Percentage
- Body Material: Forged Brass
- Trim Material: Brass
- Actuator Type: Non-Spring Return, Floating
Applications
- Hydronic heating and cooling coil control
- Commercial HVAC air handling units (AHUs)
- Fan coil unit (FCU) water flow regulation
- Building automation and DDC control systems
- Zone-level temperature control in commercial buildings
