Siemens Building Technology 257-02038 Valve Assembly
The Siemens Building Technology 257-02038 Valve Assembly is a high-performance Powermite 599 MT Series solution engineered for precise flow control in HVAC terminal units. This 2-way normally open pneumatic valve features a 1/2-inch NPT forged brass body and brass trim, ensuring durability in hot or chilled water applications such as convectors and fan coil units. With a 2.5 Cv equal percentage flow characteristic, it provides stable modulating control across a 35 to 250°F medium temperature range. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, delivering the reliable 67 lb-force required for tight close-offs up to 45 psi. As a veteren-grade ANSI Class 250 assembly, the 257-02038 offers easy field installation with an all-metal housing and a freely rotating actuator to simplify 1/8-inch NPT control air tubing connections in tight mechanical spaces.
Key Benefits for Contractors- Precise Flow Control: The 2.5 Cv rating and modified equal percentage plug provide superior linear temperature control for sensitive zone applications.
- Rugged Construction: Built with a forged brass body and brass trim to withstand demanding hydronic environments.
- Streamlined Installation: Compact 2-inch pneumatic actuator design permits installation in limited-clearance cabinets.
- Standardized Compatibility: Utilizes 1/2-inch NPT internal threads for seamless integration into existing Siemens 599 series piping systems.
What is the fail-safe position of this assembly?
This is a normally open (NO) valve, meaning it will fail to the open position upon loss of control air pressure, making it ideal for freeze protection in heating coils.
Can this valve be used for steam service?
The standard 257-02038 is designed for water applications. For low-pressure steam service, a model with stainless steel trim is typically required; verify your system PSI before procurement.
What is the maximum operating pressure?
The assembly is rated for ANSI Class 250 service, though specific close-off ratings are dependent on the actuator force and the system's static pressure.
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: $138.92
-65%$138.92
$48.62Siemens Building Technology 257-02038 Valve Assembly
The Siemens Building Technology 257-02038 Valve Assembly is a high-performance Powermite 599 MT Series solution engineered for precise flow control in HVAC terminal units. This 2-way normally open pneumatic valve features a 1/2-inch NPT forged brass body and brass trim, ensuring durability in hot or chilled water applications such as convectors and fan coil units. With a 2.5 Cv equal percentage flow characteristic, it provides stable modulating control across a 35 to 250°F medium temperature range. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, delivering the reliable 67 lb-force required for tight close-offs up to 45 psi. As a veteren-grade ANSI Class 250 assembly, the 257-02038 offers easy field installation with an all-metal housing and a freely rotating actuator to simplify 1/8-inch NPT control air tubing connections in tight mechanical spaces.
Key Benefits for Contractors- Precise Flow Control: The 2.5 Cv rating and modified equal percentage plug provide superior linear temperature control for sensitive zone applications.
- Rugged Construction: Built with a forged brass body and brass trim to withstand demanding hydronic environments.
- Streamlined Installation: Compact 2-inch pneumatic actuator design permits installation in limited-clearance cabinets.
- Standardized Compatibility: Utilizes 1/2-inch NPT internal threads for seamless integration into existing Siemens 599 series piping systems.
What is the fail-safe position of this assembly?
This is a normally open (NO) valve, meaning it will fail to the open position upon loss of control air pressure, making it ideal for freeze protection in heating coils.
Can this valve be used for steam service?
The standard 257-02038 is designed for water applications. For low-pressure steam service, a model with stainless steel trim is typically required; verify your system PSI before procurement.
What is the maximum operating pressure?
The assembly is rated for ANSI Class 250 service, though specific close-off ratings are dependent on the actuator force and the system's static pressure.
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
The Siemens Building Technology 257-02038 Valve Assembly is a high-performance Powermite 599 MT Series solution engineered for precise flow control in HVAC terminal units. This 2-way normally open pneumatic valve features a 1/2-inch NPT forged brass body and brass trim, ensuring durability in hot or chilled water applications such as convectors and fan coil units. With a 2.5 Cv equal percentage flow characteristic, it provides stable modulating control across a 35 to 250°F medium temperature range. The integrated 2-inch pneumatic actuator operates on a 3-8 PSI spring range, delivering the reliable 67 lb-force required for tight close-offs up to 45 psi. As a veteren-grade ANSI Class 250 assembly, the 257-02038 offers easy field installation with an all-metal housing and a freely rotating actuator to simplify 1/8-inch NPT control air tubing connections in tight mechanical spaces.
Key Benefits for Contractors- Precise Flow Control: The 2.5 Cv rating and modified equal percentage plug provide superior linear temperature control for sensitive zone applications.
- Rugged Construction: Built with a forged brass body and brass trim to withstand demanding hydronic environments.
- Streamlined Installation: Compact 2-inch pneumatic actuator design permits installation in limited-clearance cabinets.
- Standardized Compatibility: Utilizes 1/2-inch NPT internal threads for seamless integration into existing Siemens 599 series piping systems.
What is the fail-safe position of this assembly?
This is a normally open (NO) valve, meaning it will fail to the open position upon loss of control air pressure, making it ideal for freeze protection in heating coils.
Can this valve be used for steam service?
The standard 257-02038 is designed for water applications. For low-pressure steam service, a model with stainless steel trim is typically required; verify your system PSI before procurement.
What is the maximum operating pressure?
The assembly is rated for ANSI Class 250 service, though specific close-off ratings are dependent on the actuator force and the system's static pressure.
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.
