3

Giacomini S.p.A.

Via per Alzo 39, 28017 San Maurizio d’Opaglio (NO) Italia

 consulenza.prodotti@giacomini.com

 +39 0322 923372 - giacomini.com



Operation

The operation of the automatic air vent valve is very simple

and it is based on the principle of the floating of bodies

immersed in a fluid.

When there is no air accumulation into the valve body, the

float (A) is in raised position and through the mechanism, it

keeps the stopper under closing.

The lowering of the floating level caused by the air

accumulation into the valve body, involves the stopper

opening and the consequent discharge that persists up to

the reintroduction of the normal conditions.

If there is a lot of air in the system, the float is completely

lowered and allows the air to flow out more quickly.

The air discharge is prevented by screwing the lateral plug.

In normal operation conditions, the plug shall be unscrewed.

WATER

WATER

AIR

AIR

AIR

AIR

A

A

AIR

WATER

WATER

AIR

AIR

AIR

AIR

A

A

AIR



Dimensions

R99

B

A

B

A

PRODUCT

CODE

A

B

[mm]

C

[mm]

D

[mm]

R99Y001 G 1/4”M

48

74

8

R99Y002 G 3/8”M

48

74

8

R99Y003 G 1/2”M

48

75

-

PRODUCT

CODE

A

B

[mm]

C

[mm]

R99Y033

Ø 15

48

82

R99I

B

A

PRODUCT

CODE

A

B

[mm]

C

[mm]

D

[mm]

R99IY002 G 3/8”M

48

81

25

R99IY003

R 1/2”

48

81

25