Product Overview

CALEFFI
ISO 9001 No. 0003
ACCREDITED
ISO 9001 FM 21654
AutoFill
™
pre-adjustable fi lling units
& backfl ow preventer
553–573 series
01061/15 NA
Function
The automatic fi lling valve is a device consisting of a pressure reducing
valve with compensating seat, visual system pressure setting indicator,
an inlet fi lter, 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 fi lling 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 fi lling or topping-off phase, the water feed
will stop when the set pressure is reached. This valve fi lls 50% faster
than other valves. There are no levers to fl ip or valve to close.
Pre-assembled with the 573 series backfl ow preventer, the AutoFill
™
Combo features an atmospheric vent which is designed to protect
drinking water systems from return fl ow, caused by back-siphoning
or back pressure, of contaminated fl uids. The 573 series has been
specifi cally certifi ed to standards CSA B64.3 and ASSE 1012.
Product range
5535 series AutoFill
™
pre-adjustable automatic fi lling valve with pressure setting indicator ........................ connections ½" NPT male x ½" NPT female;
½" sweat x ½" NPT female
5536 series AutoFill
™
pre-adjustable automatic fi lling valve with pressure setting indicator and outlet pressure gauge ...... connections ½" NPT male x ½" NPT
female; ½" sweat x ½" NPT female
573 series Dual check continuous pressure backfl ow preventer with atmospheric vent .......................connections ½" and ¾" NPT female; ½" sweat
57300 series AutoFill
™
Combo pre-adjustable automatic fi lling valve with backfl ow preventer ..............................connections ½" NPT female; ½" sweat
57301 series AutoFill
™
Combo pre-adjustable automatic fi lling valve with backfl ow preventer and outlet pressure gauge ...connections ½" NPT female; ½" sweat
Technical specifi cations
Filling unit
Materials - body: brass
- cover: PA 66 GF 30
- seals: NBR
Performance
Suitable fl uids: water, glycol solution
Max. percentage of glycol: 50%
Max. working pressure: 230 psi (16 bar)
Pressure setting range: 3–60 psi (0.2–4 bar)
Factory setting: 15 psi (1.035 bar)
Indicator accuracy: ±2 psi (±0.15 bar)
Max. working temperature: 150°F (65°C)
Pressure gauge scale: 0-60 psi / 0-4 bar
Connections - 553542A ½" NPT male inlet x ½" NPT female outlet
- 553549A ½" sweat inlet x ½" NPT female outlet
- 553642A ½" NPT male inlet x ½" NPT female outlet
- 553649A ½" sweat inlet x ½" NPT female outlet
- Pressure gauge ¼" NPT
Backfl ow preventer
Material - body: brass
- fi lter: stainless steel
- check valve: PSU
-check valve stem: brass
- diaphragm: EPDM
- seals: EPDM
Performance
Suitable fl uids: 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)
Certifi ed 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 01061/12 NA