Flamco Flexvent Automatic Air Vent Owner's Manual (+ PDF)

Reliable and quick
New design
Flexvent
Automatic air vent
Owner’s Manual

Contents hide

1 Features and benefits:

2 Flexvent: Improved design

3 Advantages and features

4 Other models

5 Even more Flamco products for heating and cooling

6 Documents / Resources

6.1 References

7 Related Posts

Features and benefits:

Easy to install
Reliable and fast
Captive cap with open/close function and leak prevention
Substantial gap between water and closing: reduced chance of contamination
Extensive product range

Flexvent: Improved design

Under the name ‘Flexvent’, Flamco offers a comprehensive range of automatic floating air vents.
Flexvent air vents have proven themselves in the market for decades. Flamco has improved the Flexvent automatic floating air vent even further in terms of both the design and execution.

The Flexvent floating air vent consists of a closed brass housing and an interior made entirely of plastic.
The water level lifts the float and keeps the air valve mechanism closed. When air collects in the vent housing, the water level drops, lowering the float and opening the vent valve.
The collected air is vented, allowing the water level to rise and the air valve to close again.
This process will keep repeating as long as air enters the Vent housing during normal operation.

Advantages and features

Extensive product range

Connection	Valve sleeve	Bubble breaker	Colour	Part No.
R 1/8″	no	yes	brass	27775
R 3/8″	yes	no	brass	27750
R 1/8″ / R 3/8″	yes	no	brass	27780
R 1/2″	yes	no	brass	27740
G 1/2″	no	yes	white	27743
R 1/2″	yes	no	nickel-plated	27742
R 3/4″	yes	no	brass	27735

Other models

Flexvent H
With a ½” side connection allowing direct installation in one of the radiator plugs.
As this model is usually installed in plain sight, there are two models: nickel-plated and white.

Connection	Valve sleeve	Colour	Part No.
R 1/2″	no	Nickel-plated	27710
R 1/2″	no	white	27711

Flexvent Super
The conical cap maximises the distance between the water level and vent valve.
The vent valve is integrated in the cap, so the float mechanism cannot be damaged from the outside.

Connection	Valve sleeve	Colour	Part No.
G 1/2″ F	no	brass	28520

Flexvent Max
Similar in appearance to the Flexvent Super ½” but with a ¾” connection and suitable for pressures of up to 25 bar.

Connection	Valve sleeve	Colour	Part No.
Rp 3/4″	no	brass	28550

Flexvent Solar
Manually operated air vent for solar installa-tions with or without glycol addition.
Suitable for a supply temperature of -10 to 200°C and a maximum operating pressure of 10 bar.

Connection	Valve sleeve	Colour	Part No.
R 3/8″	no	Nickel-plated	27785

Flexvent Top Solar
This model includes a ball valve and is suitable for a supply temperature of -30 to 180°C and a maximum operating pressure of 10 bar.

Connection	Valve sleeve	Colour	Part No.
G 3/8″ M	no	brass	28505

Flexvent Top
This automatic floating air vent works on the same principle but has a larger venting capacity.

Connection	Valve sleeve	Colour	Part No.
Rp 1/2″	no	brass	28519

Flexvent Pro
The Flexvent Pro contains a filter that breaks down large air bubbles into smaller ones.
They can then find their way out more easily.

Connection	Valve sleeve	Colour	Part No.
Rp 1/2″	no	brass	28519

Flexvent Top Aqua
This model is suitable for potable water installations with a water hardness of CaCO3 < 180 mg/l. Features ACS approval (KIWA approval on request).

Connection	Valve sleeve	Colour	Part No.
Rp 1/2″	no	brass	28508

Even more Flamco products for heating and cooling

Flamco offers a wide range of products for heating, cooling and solar installations.From expansion vessels, safety valves, air and dirt separators to ball valves and handy installation aids such as the FlexConsole and T-plus.Our products are highly durable, energyefficient and have a long service life.

Flexcon Premium Expansion vessels	Airix Expansion vessels for potable water

Flexcon Solar Expansion vessels	Flexcon PA AutoFill Pressure maintenance assistant

Prescor Safety valves (Heating)	Prescor Safety valves (Potable water)

Prescor Solar Safety valves	Prescor IC Fill Safety Group

Simplex KFE Ball Valves (Heating)	Simplex KFE Ball Valves (Potable water)

Simplex KFE Ball Valves (Solar)	XStream Air and Dirt separators