1. INSTALLATION
IOM manual Tapflo TF series
9
1.7.2.
Explosion hazardous environments – ATEX
The standard PE, PTFE and SS series pumps are not allowed to operate in environments where
there is danger of explosion. Static electricity may occur in the pump under operation, which
may cause explosion and injury. Special conductive TXF pumps are available for such
applications. All our aluminium and cast iron pumps are by standard ATEX approved.
Follow below instructions and local/national rules for safe use.
For use in explosion hazardous environment a special booster is required (see chapter 4.2).
Booster ATEX classification is II 3 GD c T6. Please contact us for more details. As a general rule
it is recommended to install the booster outside of the hazardous area.
ATEX (directive 94/9/EC) classification of Tapflo TX pumps:
ATEX
II 2 GD
IIB
c
T4
Equipment group:
II
– all other explosive areas than mines;
Category group:
2
– high level of protection (can be used in zone 1);
Atmosphere:
G
– gas;
D
– dust;
Explosion group:
IIB
– such as ethylene;
Type of protection:
c
– constructional safety;
Temperature class:
T4
– in the event of a malfunction, the maximum temperature of a
surface that may be exposed to gas
T4
= 135 °C.
Earth connection of the pump and other equipment
Connect a suitable earth wire to the stainless steel earth connection that is placed on the inside
of one of the pump housings. Connect the other end of the earth wire to earth and also make
sure that other equipment like hoses/pipes/containers etc. are properly earthed/connected.
1.7.3.
Air pressure
The maximum air feed pressure for Tapflo TF pumps is 8 bar for sizes TF50, TF70, TF100 and
TF120, 7 bar for TF220 and 6 bar for sizes TF200, TF420 and TF400. This is the air pressure that
is supplied to the pressure booster. As a result the pump will be supplied with 16 bar, 14 bar
and 12 bar respectively.
To withstand this high pressure the pumps, as a standard, are equipped with a special, hybrid
air valve which is equipped with a PET piston and in case of plastic pumps, two stainless steel
reinforcement plates.
Higher air pressure can damage the pump and may cause injury to personnel in vicinity of the
pump. If you intend to apply a higher air pressure than 8 bar, please consult us.
