Siemens Building Technology 257-02042 Valve Assembly
Ensure precise hydronic control in your terminal units with the Siemens 257-02042, a robust 2-way normally open pneumatic control valve assembly designed for demanding commercial HVAC maintenance. This Powermite 599 Series MT assembly features a 1/2" NPT x Union Male connection, engineered for high-performance fluid regulation in hot or chilled water applications such as convectors and fan coil units. Utilizing a forged brass body with high-durability brass trim, this ANSI Class 250 valve is built to withstand system pressures up to 125 psi WOG while maintaining a consistent 4.0 Cv equal percentage flow characteristic for linear thermal response.
The assembly is powered by a 2-inch pneumatic actuator with a 3-8 psi spring range, providing reliable failsafe open operation during signal loss. The actuator features an all-metal housing and a low-profile design that freely rotates, simplifying field installation in tight mechanical spaces. With a medium temperature rating of 35°F to 250°F, this Siemens Building Technology component is the professional choice for contractors seeking direct replacement valve assemblies that eliminate compatibility risks and ensure long-term system stability.
Key Benefits- Optimized Flow Control: The 4.0 Cv capacity and equal percentage flow ensure accurate temperature modulation in terminal unit systems.
- Durable Construction: Forged brass body material and brass trim offer superior resistance to corrosion and wear in treated water systems.
- Pneumatic Reliability: A 3-8 psi spring range allows for seamless integration with existing pneumatic building automation systems (BAS).
- Installer-Friendly Design: The 1/2" NPT and Union Male end connections, combined with a rotating actuator, reduce assembly and labor time.
Is the Siemens 257-02042 suitable for steam service?
Yes, this Powermite 599 MT series assembly is specified for both liquid and low-pressure steam service applications up to 250°F.
What happens to the valve if the pneumatic air signal is lost?
This is a normally open (NO) assembly. If air pressure is lost, the internal spring will default the valve to the fully open position to maintain flow.
Can I install this valve in a plenum?
Yes, the 2-inch pneumatic actuator and metal housing are generally rated for installation in plenum spaces, provided local codes are followed.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $144.68
-65%$144.68
$50.64Siemens Building Technology 257-02042 Valve Assembly
Ensure precise hydronic control in your terminal units with the Siemens 257-02042, a robust 2-way normally open pneumatic control valve assembly designed for demanding commercial HVAC maintenance. This Powermite 599 Series MT assembly features a 1/2" NPT x Union Male connection, engineered for high-performance fluid regulation in hot or chilled water applications such as convectors and fan coil units. Utilizing a forged brass body with high-durability brass trim, this ANSI Class 250 valve is built to withstand system pressures up to 125 psi WOG while maintaining a consistent 4.0 Cv equal percentage flow characteristic for linear thermal response.
The assembly is powered by a 2-inch pneumatic actuator with a 3-8 psi spring range, providing reliable failsafe open operation during signal loss. The actuator features an all-metal housing and a low-profile design that freely rotates, simplifying field installation in tight mechanical spaces. With a medium temperature rating of 35°F to 250°F, this Siemens Building Technology component is the professional choice for contractors seeking direct replacement valve assemblies that eliminate compatibility risks and ensure long-term system stability.
Key Benefits- Optimized Flow Control: The 4.0 Cv capacity and equal percentage flow ensure accurate temperature modulation in terminal unit systems.
- Durable Construction: Forged brass body material and brass trim offer superior resistance to corrosion and wear in treated water systems.
- Pneumatic Reliability: A 3-8 psi spring range allows for seamless integration with existing pneumatic building automation systems (BAS).
- Installer-Friendly Design: The 1/2" NPT and Union Male end connections, combined with a rotating actuator, reduce assembly and labor time.
Is the Siemens 257-02042 suitable for steam service?
Yes, this Powermite 599 MT series assembly is specified for both liquid and low-pressure steam service applications up to 250°F.
What happens to the valve if the pneumatic air signal is lost?
This is a normally open (NO) assembly. If air pressure is lost, the internal spring will default the valve to the fully open position to maintain flow.
Can I install this valve in a plenum?
Yes, the 2-inch pneumatic actuator and metal housing are generally rated for installation in plenum spaces, provided local codes are followed.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
Ensure precise hydronic control in your terminal units with the Siemens 257-02042, a robust 2-way normally open pneumatic control valve assembly designed for demanding commercial HVAC maintenance. This Powermite 599 Series MT assembly features a 1/2" NPT x Union Male connection, engineered for high-performance fluid regulation in hot or chilled water applications such as convectors and fan coil units. Utilizing a forged brass body with high-durability brass trim, this ANSI Class 250 valve is built to withstand system pressures up to 125 psi WOG while maintaining a consistent 4.0 Cv equal percentage flow characteristic for linear thermal response.
The assembly is powered by a 2-inch pneumatic actuator with a 3-8 psi spring range, providing reliable failsafe open operation during signal loss. The actuator features an all-metal housing and a low-profile design that freely rotates, simplifying field installation in tight mechanical spaces. With a medium temperature rating of 35°F to 250°F, this Siemens Building Technology component is the professional choice for contractors seeking direct replacement valve assemblies that eliminate compatibility risks and ensure long-term system stability.
Key Benefits- Optimized Flow Control: The 4.0 Cv capacity and equal percentage flow ensure accurate temperature modulation in terminal unit systems.
- Durable Construction: Forged brass body material and brass trim offer superior resistance to corrosion and wear in treated water systems.
- Pneumatic Reliability: A 3-8 psi spring range allows for seamless integration with existing pneumatic building automation systems (BAS).
- Installer-Friendly Design: The 1/2" NPT and Union Male end connections, combined with a rotating actuator, reduce assembly and labor time.
Is the Siemens 257-02042 suitable for steam service?
Yes, this Powermite 599 MT series assembly is specified for both liquid and low-pressure steam service applications up to 250°F.
What happens to the valve if the pneumatic air signal is lost?
This is a normally open (NO) assembly. If air pressure is lost, the internal spring will default the valve to the fully open position to maintain flow.
Can I install this valve in a plenum?
Yes, the 2-inch pneumatic actuator and metal housing are generally rated for installation in plenum spaces, provided local codes are followed.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
