Siemens Building Technology 257-02068B Valve Assembly
The Siemens 257-02068B is a high-performance 3-way mixing valve assembly designed for terminal unit applications, featuring a 1/2 inch NPT connection and a 2.5 Cv linear flow characteristic. This assembly integrates a Siemens 599 Powermite MT Series forged brass body with a rugged 2-inch pneumatic valve actuator, optimized for precise control of hot or chilled water in fan coil units and reheat coils. The spring return pneumatic actuator operates within a 3-8 psi spring range, ensuring a reliable fail-safe position during control signal loss. Engineered for durability, the valve utilizes brass trim and an EPDM O-ring packing to maintain an ANSI Class IV leakage rating. This HVAC control valve is a standard-tier solution for contractors requiring a direct-coupled, tool-free installation on the universal bonnet, providing a maximum close-off pressure of 28 psi to handle demanding hydronic system requirements.
Key Benefits:- Versatile Application: Ideal for mixing hot or chilled water and glycol solutions up to 50% in terminal unit systems.
- Precision Flow Control: The 2.5 Cv linear flow characteristic ensures consistent temperature regulation across varying load conditions.
- Simplified Maintenance: Features a direct-coupled universal bonnet that allows for actuator replacement without removing the valve body from the line.
- Industrial-Grade Construction: Forged brass body with brass trim provides superior corrosion resistance and longevity in hydronic environments.
- Fail-Safe Reliabilty: The 3-8 psi spring return pneumatic actuator provides a known mechanical default state for system safety.
What is the maximum operating temperature for this valve?
This Siemens 3-way mixing valve is rated for medium temperatures ranging from 35°F to 250°F, making it suitable for both cooling and heating applications.
Can this assembly be used for steam applications?
The Siemens 257-02068B with brass trim is specifically designed for water and glycol solutions. For low-pressure steam applications under 15 psig, a stainless steel trim configuration is required.
What is the fail-safe position of the 2.5 Cv valve?
The spring return action is determined by the specific actuator mounting; typically, these assemblies are configured to return to a safe mixing or bypass state upon loss of pneumatic pilot 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: $151.11
-65%$151.11
$52.89Siemens Building Technology 257-02068B Valve Assembly
The Siemens 257-02068B is a high-performance 3-way mixing valve assembly designed for terminal unit applications, featuring a 1/2 inch NPT connection and a 2.5 Cv linear flow characteristic. This assembly integrates a Siemens 599 Powermite MT Series forged brass body with a rugged 2-inch pneumatic valve actuator, optimized for precise control of hot or chilled water in fan coil units and reheat coils. The spring return pneumatic actuator operates within a 3-8 psi spring range, ensuring a reliable fail-safe position during control signal loss. Engineered for durability, the valve utilizes brass trim and an EPDM O-ring packing to maintain an ANSI Class IV leakage rating. This HVAC control valve is a standard-tier solution for contractors requiring a direct-coupled, tool-free installation on the universal bonnet, providing a maximum close-off pressure of 28 psi to handle demanding hydronic system requirements.
Key Benefits:- Versatile Application: Ideal for mixing hot or chilled water and glycol solutions up to 50% in terminal unit systems.
- Precision Flow Control: The 2.5 Cv linear flow characteristic ensures consistent temperature regulation across varying load conditions.
- Simplified Maintenance: Features a direct-coupled universal bonnet that allows for actuator replacement without removing the valve body from the line.
- Industrial-Grade Construction: Forged brass body with brass trim provides superior corrosion resistance and longevity in hydronic environments.
- Fail-Safe Reliabilty: The 3-8 psi spring return pneumatic actuator provides a known mechanical default state for system safety.
What is the maximum operating temperature for this valve?
This Siemens 3-way mixing valve is rated for medium temperatures ranging from 35°F to 250°F, making it suitable for both cooling and heating applications.
Can this assembly be used for steam applications?
The Siemens 257-02068B with brass trim is specifically designed for water and glycol solutions. For low-pressure steam applications under 15 psig, a stainless steel trim configuration is required.
What is the fail-safe position of the 2.5 Cv valve?
The spring return action is determined by the specific actuator mounting; typically, these assemblies are configured to return to a safe mixing or bypass state upon loss of pneumatic pilot 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 257-02068B is a high-performance 3-way mixing valve assembly designed for terminal unit applications, featuring a 1/2 inch NPT connection and a 2.5 Cv linear flow characteristic. This assembly integrates a Siemens 599 Powermite MT Series forged brass body with a rugged 2-inch pneumatic valve actuator, optimized for precise control of hot or chilled water in fan coil units and reheat coils. The spring return pneumatic actuator operates within a 3-8 psi spring range, ensuring a reliable fail-safe position during control signal loss. Engineered for durability, the valve utilizes brass trim and an EPDM O-ring packing to maintain an ANSI Class IV leakage rating. This HVAC control valve is a standard-tier solution for contractors requiring a direct-coupled, tool-free installation on the universal bonnet, providing a maximum close-off pressure of 28 psi to handle demanding hydronic system requirements.
Key Benefits:- Versatile Application: Ideal for mixing hot or chilled water and glycol solutions up to 50% in terminal unit systems.
- Precision Flow Control: The 2.5 Cv linear flow characteristic ensures consistent temperature regulation across varying load conditions.
- Simplified Maintenance: Features a direct-coupled universal bonnet that allows for actuator replacement without removing the valve body from the line.
- Industrial-Grade Construction: Forged brass body with brass trim provides superior corrosion resistance and longevity in hydronic environments.
- Fail-Safe Reliabilty: The 3-8 psi spring return pneumatic actuator provides a known mechanical default state for system safety.
What is the maximum operating temperature for this valve?
This Siemens 3-way mixing valve is rated for medium temperatures ranging from 35°F to 250°F, making it suitable for both cooling and heating applications.
Can this assembly be used for steam applications?
The Siemens 257-02068B with brass trim is specifically designed for water and glycol solutions. For low-pressure steam applications under 15 psig, a stainless steel trim configuration is required.
What is the fail-safe position of the 2.5 Cv valve?
The spring return action is determined by the specific actuator mounting; typically, these assemblies are configured to return to a safe mixing or bypass state upon loss of pneumatic pilot 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.
