Liquid return temperature limiter | ARI

Key Components and Features:

1. Liquid Drainer (PN16 / PN40):

   • Available with various connection types (flanges, screwed sockets, socket weld ends, and butt weld ends).
   • Materials: Grey cast iron, forged steel.
   • Nominal Diameter: DN15 to DN25 (1/2" to 1").
   • Operating Pressure: PN16 (12.8 barg) and PN40 (32 barg).
   • Temperature Range: Up to 300°C (for PN16) and up to 385°C (for PN40).
   • Function: Automatic condensate discharge during start-up and shutdown with adjustable closing pressures (1.5 bar factory setting).
     
     

2. Condensate Discharge Temperature Limiter (PN40):

   • Material: Forged steel.
   • Temperature Range: Can handle up to 450°C.
   • Applications: Used for systems requiring specific condensate discharge temperatures, with the possibility of adjusting the closing temperature.
     
     

3. Return Temperature Limiter (PN40):

   • Material: Forged steel.
   • Function: Optimizes energy consumption by limiting the return temperature in heating systems to a lower level.
   • Temperature Range: Closing temperature can be set from 60°C to 130°C.
   • Features: Equipped with a corrosion- and waterhammer-resistant bimetallic controller.
     
     

4. Automatic Air Vent for Liquid Systems (PN16 / PN25 / PN40):

   • Materials: SG iron, cast steel, stainless steel.
   • Applications: Automatically vents air from liquid systems to ensure proper system pressure.
   • Pressure and Temperature: Can handle up to 21 barg and 400°C.
     
     

5. Vacuum Breaker (PN16 / PN40):

   • Material: Stainless steel.
   • Function: Prevents a vacuum from forming in pipelines, thus protecting the system from potential damage.
   • Pressure Range: Operates under pressures up to 21 barg.

General Features:

• Capacity Charts: The document includes performance charts for each component, showing flow rates and pressure limits based on the differential pressure and temperature conditions.
• Installation: These components can be installed in various configurations (vertical, horizontal) with different connection types, offering flexibility for various applications.

Customizable Options:

• Blowdown Valve: Can be added for easier cleaning and maintenance.
• Thermometer Inserts: Optional thermometer can be included for monitoring temperatures.
• External Adjustment Devices: Some models offer this feature for fine-tuning settings.

These components are designed for efficient condensate management, temperature control, and system protection, suitable for HVAC, steam systems, and industrial heating applications.