Siemens Building Technology 285-06171 Flowrite 3-Way Mixing Valve Assembly 3-Inch 100 Cv 12-Inch Pneumatic Actuator with Positioner

The Siemens Building Technology 285-06171 is a Flowrite 599 Series complete valve and actuator assembly featuring a 3-inch, 3-way mixing globe valve paired with a 12-inch pneumatic actuator and factory-mounted positioner. Designed for precise hydronic flow control in commercial HVAC and building automation systems, this assembly provides reliable mixing of hot and cold water streams to maintain accurate supply temperatures.

The 285 prefix designates a pneumatic actuator with factory-mounted positioner using a 599-01010 actuator combined with a 599-00423 positioner, delivering a 3/4-inch (20mm) stroke with spring-return fail-safe action. The flanged iron body valve is rated at 100 Cv flow capacity and is built to ANSI Class 125/250 standards for dependable performance in demanding building systems.

Key Features:

• 3-inch flanged iron body, 3-way mixing globe valve
• 100 Cv flow capacity
• 12-inch pneumatic actuator (599-01010) with factory-mounted positioner (599-00423)
• 3/4-inch (20mm) stroke with spring-return fail-safe
• ANSI Class 125/250 rated
• Compatible with water and glycol solutions up to 50%
• Bronze trim with normal duty packing
• Flanged end connections per ANSI/ISA S75.03 face-to-face dimensions
• NEMA 1 rated for interior installation

This complete assembly is part of Siemens' proven Flowrite 599 Series lineup, widely used in commercial building HVAC applications for precise pneumatic control of heating and cooling water systems. Component valve body part number: 599-06171; actuator: 599-01010 + 599-00423.