Description
Parker-Sporlan 475443 Two-Way Pressure Independent Control Valve
The Parker-Sporlan 475443 is a professionally engineered Two-Way Normally Closed Pressure Independent Control Valve (PICV) designed for demanding commercial HVAC hydronic systems. Featuring a 2-1/2″ NPT connection and a rated flow capacity of 95 GPM, this valve delivers precise, energy-efficient flow control in variable-flow systems — eliminating the need for separate balancing valves.
Key Features
- Two-way, normally closed (NC) valve configuration
- 2-1/2″ NPT end connections for straightforward installation
- 95 GPM maximum flow capacity
- Equal percentage flow characteristic for superior modulating control
- Pressure independent design maintains set flow regardless of system pressure fluctuations
- Brass body construction for corrosion resistance and durability
- Stainless steel trim for long service life and reliable sealing
- Spring return actuator ensures fail-safe normally closed position on power loss
- 24 Vac actuator power supply
- Multiple control signal inputs: 0–10 Vdc, 2–10 Vdc, and 4–20 mA (with 500-ohm resistor)
Control & Actuator Specifications
- Control Signal: 0–10 Vdc / 2–10 Vdc / 4–20 mA (500-ohm resistor included)
- Actuator Supply Voltage: 24 Vac
- Actuator Type: Spring Return (fail-safe, normally closed)
- Flow Characteristic: Equal Percentage
Valve Body Specifications
- Valve Type: 2-Way, Normally Closed
- Connection Size: 2-1/2″ NPT
- Body Material: Brass
- Trim Material: Stainless Steel
- Rated Flow: 95 GPM
- Flow Characteristic: Equal Percentage
- Design: Pressure Independent Control Valve (PICV)
Applications
- Commercial and industrial hydronic heating and cooling systems
- Variable flow air handling units (AHUs) and fan coil units (FCUs)
- Chilled water and hot water distribution systems
- Building automation and energy management systems
- Systems requiring precise flow balancing without separate balancing valves
Why Choose a Pressure Independent Control Valve?
Pressure Independent Control Valves combine the functions of a control valve and a balancing valve in a single device. By maintaining a constant differential pressure across the valve regardless of system pressure changes, the Parker-Sporlan 475443 ensures accurate flow delivery at every load condition — improving comfort, reducing energy consumption, and simplifying commissioning.
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