Description
Siemens Building Technology 257-02070B 3-Way Mixing Valve Assembly Overview
The Siemens Building Technology 257-02070B is a precision-engineered 3-way mixing valve assembly designed for commercial and industrial hydronic systems. Built for reliable flow control and long-term performance, this valve combines a durable forged brass body with brass trim and a factory-matched pneumatic actuator — delivering a ready-to-install solution for demanding building automation applications.
Key Features
- 3-way mixing valve configuration for blending or diverting hydronic flow
- 3/4″ NPT end connections for straightforward pipe integration
- 6.3 Cv flow coefficient with linear flow characteristic for precise, proportional control
- Forged brass body construction for superior strength and corrosion resistance
- Brass trim for compatibility with hydronic water systems
- Integrated pneumatic actuator with a 3–8 PSI spring range for reliable modulating control
- Factory-assembled valve and actuator for simplified installation and commissioning
Specifications
- SKU: 257-02070B
- Brand: Siemens Building Technology
- Valve Type: 3-Way Mixing
- Connection Size: 3/4″ NPT
- Flow Coefficient (Cv): 6.3
- Flow Characteristic: Linear
- Body Material: Forged Brass
- Trim Material: Brass
- Actuator Type: Pneumatic
- Spring Range: 3–8 PSI
Applications
- Commercial HVAC hydronic heating and cooling systems
- Building automation and direct digital control (DDC) systems
- Fan coil units, air handling units, and heat exchangers
- Pneumatically controlled mixing and diverting applications
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