5
4PV72EN - 4/2022
2 INTRODUCTION
2.1 General safety instructions
The symbols in Table 1 are used in this manual to highlight
the parts requiring particular attention.
Hazard severity panels.
DANGER!
DANGER indicates a hazard with a high level of risk
which, if not avoided, will result in death or serious injury.
WARNING!
WARNING indicates a hazard with a medium level of
risk which, if not avoided, could result in death or serious
injury.
CAUTION!
CAUTION indicates a hazard with a low level of risk
which, if not avoided, could result in minor or moderate
injury.
Table 1.
Warning and safety signs.
Symbol
Description
Risk to personal safety:
Neglecting the safety measures can cause serious injury
or death.
Crushing hazard.
Read the operation and maintenance instructions:
Read and understand the operation and maintenance
instructions before using the product.
Mandatory action symbol:
Obey these instructions to prevent machine
malfunctions.
Forbidden action.
Prevent accidents and ensure the valve’s appropriate operation
by complying with the installation, safety, and maintenance
instructions in this manual. Installation and maintenance of
the valve must be carried out by persons with appropriate
training. Electrical installation work of the actuator must be
performed by a qualified electrician.
Access to the IOM-manual must be guaranteed at all times
at the place of operation of the valve. It is required to observe
the IOM-manual in all work tasks for the valve.
Use personal protective equipment when performing any
checks or maintenance operation for the valve (goggles,
helmet, clothing and gloves). Always follow the factory safety
regulations.
In case of any discrepancies between translations, the English
version shall prevail.
2.2 Applications and purpose of use
Flowrox PVEG is made for processes involving pressure
resistance, abrasion, corrosion and aggressive slurries. In
open position, the PVEG valve is at full bore with no flow
restrictions.
The core of the PVEG valve is an elastic sleeve, which is the
only part in contact with the process medium. Designed to
withstand wear, corrosion and chemicals, Flowrox sleeves
guarantee non-clogging, trouble free operation and extended
lifetime. The sleeves are bubble tight and easily replaceable if
necessary.
Restrictions on use for PVEG valves
The valve temperature and pressure range must not be
exceeded. The temperature ranges are given in Table 2 for
standard sleeve materials. Check the pressure class from the
valve type plate. Do not use higher pipeline pressure than
rated for the valve.
Table 2.
Temperature ranges for PVEG valves.
Sleeve material
SBRT
EPDM
Min valve operating temperature °C
(°F)
0
(32)
0
(32)
Max valve operating temperature °C
(°F)
+70
(+158)
+70
(+158)
Using the valve in explosive conditions
This valve type is not designed for Ex-areas.
