Siemens Building Technology Normally Closed Valve Assembly Cv HVAC Control Valves & Actuators

The Siemens Building Technology normally closed valve assembly is a factory-matched HVAC control valve and actuator package. It is also called a valve actuator assembly or a Flowrite-style control valve. It regulates hot water, chilled water and other hydronic flow in terminal units, coils and air handlers. Each assembly is rated by its flow coefficient (Cv). This lets installers match the valve to the required flow in the system.

Key Features:

• Normally closed operation: The valve stays closed when the actuator is not energized or driven open. This helps protect coils and equipment.
• Valve and actuator supplied as an assembly: The valve body and actuator are matched by Siemens. This simplifies selection and ordering.
• Cv-rated flow capacity: A range of Cv ratings supports accurate sizing for different loads.
• Actuator options: Siemens offers electronic, electro-hydraulic and pneumatic actuator designs across its valve lines. Control signals include two-position, floating and proportional.
• Durable construction: Siemens control valves are commonly built with bronze or brass bodies and brass or stainless steel trim. They are designed for hydronic and, in some models, steam service.
• Direct-coupled mounting: A threaded bonnet design on many models lets the actuator mount to the valve body quickly.

Siemens Building Technology is a long-established name in HVAC and building automation controls. These valve assemblies suit commercial and institutional heating and cooling systems that need reliable, repeatable flow control.