▸ Key Features:
• Automatic flow control valve for hydronic HVAC systems
• Maintains constant design flow rate under varying system pressures
• Rated for 10.00 GPM as indicated on OEM label
• Cast-iron housing with threaded end connections
• Dual test ports for differential pressure measurement and commissioning
• Suitable for heating and cooling water applications
▸ Applications:
• Hydronic heating and cooling water systems
• Coil circuits in air handlers, fan coils, and VAV boxes
• Building system balancing and flow stabilization
• Branch and riser flow regulation in chilled/hot water loops
• Commercial HVAC system commissioning
▸ Alternative Model Numbers:
3531-H-A0
3531HAO (letter O variant)
3531H-A-0
Griswold 3531 Series Valve
Automatic Flow Limiter 3531HA0
▸ Common Misspellings or Phrasing:
3531HAD
3531HAO (letter O misread as zero)
3531-H-AO
Grisworld 3531
Flow Control Valve 3531H
