Caleffi

AutoFill™ 553642A Pre-Adjustable Automatic Filling Valve, 1/2 in Nominal, MNPT x FNPT End Style, 230 psi Pressure, Brass Body

CLF553642A MFG #: 553642A
AutoFill™ 553642A Pre-Adjustable Automatic Filling Valve, 1/2 in Nominal, MNPT x FNPT End Style, 230 psi Pressure, Brass Body
  • Body Material: BRASS
  • End Style: MNPT x FNPT
  • Nominal Size: 1/2 in
  • Pressure Rating: 230 psi
  • Manufacturer: Caleffi
  • Manufacturer #: 553642A
  • Series: 553
  • Temperature Rating: 150 deg F
  • Type: Pre-Adjustable
The automatic filling valve is a device consisting of a pressure reducing valve with compensating seat, visual system pressure setting indicator, an inlet filter, anti-scale internal parts, a shut-off valve (round knob on bottom) and a check valve. It is installed on the water inlet piping in sealed heating systems, and its main function is to maintain the pressure of the system at a set value, automatically filling up with water as required. The valve is pre-adjustable, meaning it can be set to the desired pressure value before the system charging phase. After installation, during the filling or topping-off phase, the water feed will stop when the set pressure is reached. This valve fills 50% faster than other valves. There are no levers to flip or valve to close.

Caleffi AutoFill™ Automatic Filling Valve, Pre-Adjustable, Series: 553, 1/2 in Nominal, MNPT x FNPT, 230 psi, 150 deg F, Media: Water/Glycol, Brass Body, NBR Seal, 4-3/4 in L
  • Features
  • Includes
  • Product Videos
  • Anti-scale with visual system pressure indicator
  • Automatic fast-filling - Fast fills the system to set pressure then automatically shuts off the water feed, no levers to flip or valves to close
  • Maintains stable pressure at pre-setting - Fill the system to a set pressure and maintain that pressure setting regardless of inlet pressure variations
  • Anti-scale polymer materials - Prevents scaling on internal sliding surfaces, assuring stable pressure control and long operating life
  • Built-in shut-off valve and check valve - Allows isolation of system from supply and check valve prevents loss of system pressure if the supply water drops below system pressure
  • Pre-calibration - Before charging the system, use a screwdriver to turn dial to intended system pressure, downstream pressure gauge is not required
Manual Shut-Off Valve, Strainer, Check Valve and 0 to 60 psi Pressure Gauge