The standard stainless steel 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 TX pumps are available for such applications.
All our aluminium and cast iron pumps are by standard ATEX approved, having model names
TX… Follow below instructions and local/national rules for safe use.
ATEX (directive 2014/34/EU) classification of Tapflo TX pumps:
II 2G Ex h IIC T6…T4 Gb
II 2D Ex h IIIC T60ºC…T125ºC Db
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: IIC – gas group (such as acetylene, hydrogen);
IIIC – dust group (conductive dusts);
Type of protection: h – control of ignition sources;
Temperature class: T4, T6 – in the event of a malfunction, the maximum temperature of
a surface that may be exposed to gas T4 = 135°C, T6 = 85°C;
EPL protection level: Gb, Db – high protection.
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.
Dry run in ATEX pump
ATEX approved pumps can run dry without increasing the risk of creating potential ignition
sources. Nevertheless, dry run periods should be decreased to minimum as they increase the
wear of parts inside of the pump. What is more, when running dry (e.g. during self-priming) the
pump should run at a low speed controlled via a needle valve.
Antistatic surface
Pumps in ATEX execution should be cleaned in order to preserve antistatic properties. Layer of
dust or other solid particles on the outer surfaces is unacceptable.
The maximum air pressure for Tapflo pumps is 8 bar. Higher air pressure than 8 bar 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.
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