Siemens Building Technology 258-02069 Valve Assembly
The Siemens Building Technology 258-02069 is a field-proven 3-way mixing valve assembly engineered for high-performance terminal unit control in commercial HVAC systems. This Powermite 599 MT Series unit features a 1/2-inch NPT female-threaded connection and a 4.0 Cv capacity, optimized for a linear flow characteristic to maintain stable discharge temperatures. The ANSI Class 250 forged brass body, paired with durable brass trim and EPDM O-rings, ensures long-term reliability when handling hot water, chilled water, or 50% glycol solutions. Actuation is managed by a factory-integrated 2-inch pneumatic valve actuator with an 8-13 PSI spring range, providing fail-safe operation to the upper port (NC). Designed for high-pressure environments, it handles media temperatures from 35°F up to 250°F and offers a close-off rating of 50 PSI, meeting ANSI Leakage Class IV standards. This assembly is the standard for contractors requiring precise proportional control within compact mechanical footprints.
Key Benefits- Precision Mixing: Engineered for 3-way mixing applications with a 4.0 Cv rating to ensure accurate fluid blending in hydronic loops.
- Rugged Construction: Forged brass body and brass trim exceed ANSI Class 250 requirements for durability in demanding piping systems.
- Fail-Safe Performance: The 8-13 PSI pneumatic actuator provides mechanical spring return, ensuring a known position during control signal loss.
- Flexible Media Handling: Industrial-grade seals permit the use of water or ethylene glycol concentrations up to 50% without performance degradation.
What is the fail-safe position of the 258-02069?
On loss of pneumatic pressure, the internal return spring forces the valve to the upper port position, ensuring a fail-safe state tailored for mixing configurations.
Can this assembly be used for steam applications?
While the PowerMite 599 MT series is primarily rated for water and glycol, specialized trim options are often required for steam. This specific brass trim configuration is rated for liquid media up to 250°F.
Is the actuator field-replaceable?
Yes, the pneumatic actuator uses a direct-coupled universal bonnet, allowing for straightforward replacement or maintenance without removing the valve body from the line.
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.
Siemens Building Technology 258-02069 Valve Assembly
The Siemens Building Technology 258-02069 is a field-proven 3-way mixing valve assembly engineered for high-performance terminal unit control in commercial HVAC systems. This Powermite 599 MT Series unit features a 1/2-inch NPT female-threaded connection and a 4.0 Cv capacity, optimized for a linear flow characteristic to maintain stable discharge temperatures. The ANSI Class 250 forged brass body, paired with durable brass trim and EPDM O-rings, ensures long-term reliability when handling hot water, chilled water, or 50% glycol solutions. Actuation is managed by a factory-integrated 2-inch pneumatic valve actuator with an 8-13 PSI spring range, providing fail-safe operation to the upper port (NC). Designed for high-pressure environments, it handles media temperatures from 35°F up to 250°F and offers a close-off rating of 50 PSI, meeting ANSI Leakage Class IV standards. This assembly is the standard for contractors requiring precise proportional control within compact mechanical footprints.
Key Benefits- Precision Mixing: Engineered for 3-way mixing applications with a 4.0 Cv rating to ensure accurate fluid blending in hydronic loops.
- Rugged Construction: Forged brass body and brass trim exceed ANSI Class 250 requirements for durability in demanding piping systems.
- Fail-Safe Performance: The 8-13 PSI pneumatic actuator provides mechanical spring return, ensuring a known position during control signal loss.
- Flexible Media Handling: Industrial-grade seals permit the use of water or ethylene glycol concentrations up to 50% without performance degradation.
What is the fail-safe position of the 258-02069?
On loss of pneumatic pressure, the internal return spring forces the valve to the upper port position, ensuring a fail-safe state tailored for mixing configurations.
Can this assembly be used for steam applications?
While the PowerMite 599 MT series is primarily rated for water and glycol, specialized trim options are often required for steam. This specific brass trim configuration is rated for liquid media up to 250°F.
Is the actuator field-replaceable?
Yes, the pneumatic actuator uses a direct-coupled universal bonnet, allowing for straightforward replacement or maintenance without removing the valve body from the line.
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 258-02069 is a field-proven 3-way mixing valve assembly engineered for high-performance terminal unit control in commercial HVAC systems. This Powermite 599 MT Series unit features a 1/2-inch NPT female-threaded connection and a 4.0 Cv capacity, optimized for a linear flow characteristic to maintain stable discharge temperatures. The ANSI Class 250 forged brass body, paired with durable brass trim and EPDM O-rings, ensures long-term reliability when handling hot water, chilled water, or 50% glycol solutions. Actuation is managed by a factory-integrated 2-inch pneumatic valve actuator with an 8-13 PSI spring range, providing fail-safe operation to the upper port (NC). Designed for high-pressure environments, it handles media temperatures from 35°F up to 250°F and offers a close-off rating of 50 PSI, meeting ANSI Leakage Class IV standards. This assembly is the standard for contractors requiring precise proportional control within compact mechanical footprints.
Key Benefits- Precision Mixing: Engineered for 3-way mixing applications with a 4.0 Cv rating to ensure accurate fluid blending in hydronic loops.
- Rugged Construction: Forged brass body and brass trim exceed ANSI Class 250 requirements for durability in demanding piping systems.
- Fail-Safe Performance: The 8-13 PSI pneumatic actuator provides mechanical spring return, ensuring a known position during control signal loss.
- Flexible Media Handling: Industrial-grade seals permit the use of water or ethylene glycol concentrations up to 50% without performance degradation.
What is the fail-safe position of the 258-02069?
On loss of pneumatic pressure, the internal return spring forces the valve to the upper port position, ensuring a fail-safe state tailored for mixing configurations.
Can this assembly be used for steam applications?
While the PowerMite 599 MT series is primarily rated for water and glycol, specialized trim options are often required for steam. This specific brass trim configuration is rated for liquid media up to 250°F.
Is the actuator field-replaceable?
Yes, the pneumatic actuator uses a direct-coupled universal bonnet, allowing for straightforward replacement or maintenance without removing the valve body from the line.
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.
