Description
Overview
The Parker-Sporlan 475447 is a 2-1/2″ NPT, two-way pressure independent control valve (PICV) engineered for precision hydronic flow management in commercial HVAC systems. Featuring a brass body with stainless steel trim, this valve combines flow-limiting and modulating control functions into a single assembly — eliminating the need for separate balancing valves and simplifying system design.
Key Features
- 2-1/2″ NPT connection for straightforward installation into standard piping systems
- Pressure independent design maintains accurate flow regardless of system pressure fluctuations
- Two-way equal percentage flow characteristic for precise, stable control across the full operating range
- Brass valve body with stainless steel trim for durability and corrosion resistance
- Maximum flow rate of 95 GPM to suit medium-to-large commercial hydronic applications
- Non-spring return actuator — valve holds last position on power loss
- Modulating and floating control modes for flexible integration with BAS/DDC systems
Control Signal Compatibility
- 0–10 Vdc control input
- 2–10 Vdc control input
- 4–20 mA control input (via integrated 500-ohm resistor)
- 24 Vac power supply
Valve Body & Trim
- Body material: Brass
- Trim material: Stainless steel
- End connection: NPT (National Pipe Thread)
- Valve size: 2-1/2″
- Flow characteristic: Equal percentage
- Configuration: Two-way
Actuator Details
- Power supply: 24 Vac
- Control signals: 0–10 Vdc, 2–10 Vdc, 4–20 mA (with 500-ohm resistor)
- Operation type: Non-spring return
- Control modes: Modulating, Floating
Applications
- Variable air volume (VAV) and fan coil unit hydronic systems
- Chilled water and hot water distribution in commercial buildings
- Building automation and direct digital control (DDC) integration
- Systems requiring precise flow balancing without separate balance valves
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