Siemens Building Technology Three-Way Mixing Valve Assembly with Pneumatic Actuator

The Siemens Building Technology three-way mixing valve assembly with pneumatic actuator (also called a 3-way mixing valve and actuator assembly or pneumatic control valve) is built for HVAC and building automation systems. Each assembly pairs a Flowrite/Powermite 599 Series three-way globe valve body with a spring-return pneumatic actuator. This lets it blend two incoming fluid streams into one outlet stream with accurate, proportional control.

Key Features:

• Three-way mixing design: blends two supply streams into a single outlet, which suits temperature control in hot water, chilled water and glycol loops.
• Factory-assembled valve and actuator: the valve body and pneumatic actuator come as one assembly, so you don't have to match the two parts yourself.
• Pneumatic, spring-return actuator: controlled by an air signal, with the spring driving the valve to its default position when air pressure is lost.
• ANSI Class 250 valve body: built for demanding commercial HVAC service.
• Equal-percentage/linear flow characteristic: gives stable, predictable control across the valve's range.
• Female NPT end connections with brass or stainless steel trim: a durable, corrosion-resistant build that installs easily into threaded piping.
• Typical applications: mixing hot or chilled water, and controlling glycol solutions up to 50%.

Siemens Building Technology is a long-established name in building controls and HVAC valves and actuators. This product line is a dependable choice for replacement and upgrade work in pneumatic control systems. It helps keep temperature regulation consistent, energy use down and system operation reliable. Choose the variant that matches your required valve and actuator configuration.