OPERATION AND MAINTENANCE MANUAL
12-2015
4
Zawór 7010 DN50, DN80, DN100
Przepływ maksymalny zaworu 7010
DN
Q
max
, m
3
/h
50
1182
80
2498
100
5601
2 STRUCTURE
2.1 FITTING STRUCTURE DESCRIPTION
F.A. „JAFAR” S.A manufactures cast iron, flanged air valves TYPE 7010 for potable water
and industrial systems. They have a cast iron body which houses a loose ball, which is a closing
component (float). The ball is made of metal insert fully covered with a rubber layer. The ball is
able to float when the valve is filled with water because it has lower density than water. Ball
density is chosen so that during air release via the valve, the ball is positioned in the lower part of
the body, and during water filling raised together with the water level. After the chamber has been
filled with water, the ball is positioned in the valve nest in its upper part and closes the flow.
However, during the aerating the ball, as the water level in the valve chamber decreases,
initially assumes position at the ledges in the lower part, not closing the air flow to the pipeline.
The body chamber is covered with a cast iron cover, caulked with an o-ring gasket, connected
with the body with hex head screws screwed into the body. All the internal and external cast iron
