Description
Parker-Sporlan 475445 Pressure Independent Control Valve Assembly Overview
The Parker-Sporlan 475445 is a precision-engineered Pressure Independent Control Valve (PICV) assembly designed for demanding commercial HVAC hydronic systems. Combining a two-way equal percentage flow control valve with a direct coupled actuator in a single integrated assembly, this unit simplifies installation while delivering consistent, reliable flow control regardless of system pressure fluctuations.
Valve Body & Trim Specifications
- Connection Size: 2-1/2″ NPT
- Body Material: Brass for corrosion resistance and durability
- Trim Material: Stainless Steel for long service life
- Flow Characteristic: Two-Way Equal Percentage
- Maximum Flow Rate: 95 GPM
- Valve Type: Pressure Independent Control Valve (PICV)
Actuator Specifications
- Control Voltage: 24 Vac
- Actuator Type: Direct Coupled, Non-Spring Return
- Control Signal: Floating or Two-Position
- Switching: SPDT (Single Pole Double Throw)
- Internal Auxiliary Switches: Two (2) included
Key Features & Benefits
- Pressure Independent design maintains accurate flow control across varying system pressures — eliminates the need for separate balancing valves
- Equal percentage flow characteristic provides precise modulation and improved system efficiency
- Brass body construction offers excellent resistance to corrosion in hydronic applications
- Stainless steel trim ensures long-term durability and tight shutoff
- Non-spring return actuator retains last position on power loss, reducing wear and energy consumption
- Floating or two-position control flexibility accommodates a wide range of BAS/DDC controller outputs
- SPDT switching with two internal auxiliary switches enables end-of-travel feedback and system interlocking
- Direct coupled actuator design simplifies installation and reduces maintenance requirements
- Integrated valve-and-actuator assembly reduces field assembly time and potential leak points
Typical Applications
- Commercial HVAC chilled water and hot water coil control
- Air handling units (AHUs) and fan coil units (FCUs)
- Variable flow hydronic distribution systems
- Building automation and DDC-controlled HVAC systems
- Large-tonnage cooling and heating plants requiring accurate flow balancing
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