CALEFFI 553 Series Manual

Pre-adjustable filling units
© Copyright 2015 Caleffi
Function
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 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 stable at a set value, automatically filling up
with water as required.
This valve has been designed as pre-adjustable, which means that it can be
adjusted at the required 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 filling 50% faster than other valves. There are no levers to
flip or valve to close.
Pre-assembled with the 573 series backflow preventer, the AutoFill ™ Combo features
an atmospheric vent which is designed to protect drinking water systems from return
flow, caused by back-siphoning or back pressure, of contaminated fluids. The 573
series has been specifically certified to standards CSA B64.3 and ASSE 1012.
553
Product Range
Technical Filling unit
Specifications
Materials - body:
Performance
Suitable fluids:
Max. percentage of glycol:
Max. inlet pressure:
Preset outlet pressure:
Factory setting:
Indicator accuracy:
Max. working temperature:
Pressure gauge scale:
Connections - 553542A
553542A ½" M NPT inlet x ½" F NPT outlet
553549A ½" sweat inlet x ½" F NPT outlet
553642A ½" M NPT inlet x ½" F NPT outlet / gauge
553649A ½" sweat inlet x ½" F NPT outlet / gauge
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- cover: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- seals: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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- 553549A . . . . . . . . . .
- 553642A . . . . . . . .
- 553649A . . . . . . . . . .
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1/2" male NPT inlet x 1/2" female NPT outlet
1/2" sweat inlet x 1/2" female NPT outlet
1/2" male NPT inlet x 1/2" female NPT outlet
1/2" sweat inlet x 1/2" female NPT outlet
38467.03
553 Series
.brass
PA 66 GF 30
NBR
water, glycol solution
50%
230 psi (16 bar)
3–60 psi (0.2–4 bar)
15 psi (1.035 bar)
±2 psi (±0.15 bar)
150°F (65°C)
0–60 psi / 0–6 bar)