Brochure

CALEFFI
ACCREDITED
ISO 9001 No. 0003
ISO 9001 FM 21654
AutoFill
pre-adjustable filling units
& backflow preventer
553573 series
01061/12 NA
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. 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.
Product range
553 series AutoFill
pre-adjustable automatic filling valve with pressure setting indicator .................... connections 1/2" NPT male x 1/2" NPT female;
1/2" sweat x 1/2" NPT female
573 series Dual check continuous pressure backflow preventer with atmospheric vent ................ connections 1/2" and 3/4" NPT female; 1/2" sweat
573 series AutoFill
Combo pre-adjustable automatic filling valve with backflow preventer ..........................connections 1/2" NPT female; 1/2" sweat
Technical specifications
Filling unit
Materials - body: brass
- cover: PA 66 GF 30
- seals: NBR
Performance
Suitable fluids: water, glycol solution
Max. percentage of glycol: 50%
Max. working pressure: 230 psi (16 bar)
Pressure setting range: 360 psi (0.24 bar)
Factory setting: 15 psi (1.035 bar)
Indicator accuracy: ±2 psi (±0.15 bar)
Max. working temperature: 150°F (65°C)
Connections - 553542A 1/2" NPT male inlet x 1/2" NPT female outlet
- 553549A 1/2" sweat inlet x 1/2" NPT female outlet
Backflow preventer
Material - body: brass
- filter: stainless steel
- check valve: PSU
-check valve stem: brass
- diaphragm: EPDM
- seals: EPDM
Performance
Suitable fluids: water
Max. working pressure: 175 psi (12 bar)
Max. working temperature: 210°F (99°C)
Filter screen mesh diameter: .474 mm (35 mesh)
Emergency backpressure temperature: 250°F (120°C)
Certified to: CSA B64.3 and ASSE 1012
Connections 1/2", 3/4" NPT female with union
1/2" sweat with union
1/2" sweat inlet x 1/2" NPT female outlet
Replaces 01061/08 NA

Summary of content (4 pages)