4PV72EN - 4/2022
6
2.3 General description
Principle of operation
Flowrox PVEG valve is built with a corrosion resistant and
light-weight plastic body and a rubber sleeve as a standard
structure. Removable sleeve means no parts of the body are in
contact with the process medium.
In the open position the valve provides full bore through
which the medium can travel.
When closing the valve, the upper side of the sleeve is
pushed progressively towards the other side until it reaches
the fully closed position. When the valve is fully closed, the
sleeve is squeezed between the closing element and the valve
body, effectively sealing and completely containing the line
pressure.
The valve must not be used to throttle the flow as this
will lead to premature failure of the sleeve.
This valve is intended for on-off operation only.
Mechanical structure
Flowrox valves are normally delivered fully assembled with
actuators and ready for use. Exploded views of valve with the
alternative actuators, manual and pneumatic are shown in
Figure 1 and Figure 2.
Figure 1. FExploded view of PVEG valve with manual
actuator.
Table 3.
Part list of PVEG valve with manual actuator.
Part
Description
Part
Description
1
Body
7
Sleeve
2
Pusher with nut bushing
8
Ball thrust bearing
3
Stem
9
Key
4
Bracket bushing
10
Locking ring
5
Hand wheel
11
Hex socket head screw
6
Teflon ring
12
Nut
