ATEX Diaphragm Pump Metal

The ATEX directive (also known as ATEX 100a) applies to products used in hazardous areas such as those subject to explosions like our ATEX Diaphragm Pumps. This directive also covers non-electrical products, like our Diaphragm Pumps. Since July 2003, it is now mandatory within the EU to have an ATEX certificate on products intended for use in EX-zones. There are three main categories (zones) in the ATEX directive:

• CAT 1 (zone 0), flammable material present continuously or for long periods
• CAT 2 (zone 1), flammable material occasionally present in normal operation
• CAT 3 (zone 2), flammable material present in abnormal conditions for short periods

Tapflo ATEX Metal Diaphragm Pump constructed from conductive (carbon filled) plastics HDPE or PTFE, can be supplied for use within Equipment group IIG (gas), Cat 2 (Zone 1). The conductive material ensures that no electrostatic loads will accumulate within the pump. The conductive pigments in the material reduce the surface resistance to less than 105 W. The pigments, causing the black colour do not affect the chemical resistance of the thermoplastics that the pump is made from. The ATEX Metal Diaphragm Pump has diaphragms in PTFE (with conductive back) or EPDM (conductive). An earth connection is mounted on the pump for earthing of electrostatic loads. The TX variant can be supplied across all sizes of Tapflo pumps.

Tapflo’s AOD ATEX range is now available for ATEX Zone 0 as the TZ ATEX Pump. This excludes the Aluminium Metal Diaphragm Pump series.

This pump also offers pneumatic and electric valve draining; speak to a team member to discuss this option.

• Flows up to 820 l/min
• Pressures up to 160m
• Self-priming
• Solids handling up to 100mm
• Viscosity up to 200 cSt
• Conductive material ensures no electrostatic loads will be accumulated in the pump
• Diaphragms in PTFE (with conductive back) or EPDM (conductive)

Data	Pump Size
	25	70A	70S	120A	120S	220A	220S	420A	420S	820A	820S
General Characteristics
*Max Capacity (l/min)	26	78		158		330		570		820
**Volume per Stroke (ml)	45	105	101	272	304	884	962	2440	2480	4897	3452
Max Discharge Pressure (Bar)	8	8	8	8	8	8	8	8	8	8	8
Max Air Pressure (Bar)	8	8	8	8	8	8	8	8	8	8	8
***Max Suction Lift Dry (m)	1.5	3		4		4		4		5
Max Suction Lift Wet (m)	8	8		8		8		8		8
Max Size of Solids (ø in mm)	3	4		6		10		15		13
Max Temperature with EPDM/NBR (°C)	80	80	80	80	80	80	80	80	80	80	80
Max Temperature with PTFE (°C)	110	110	110	110	110	110	110	110	110	110	110
Weight
Standard Model in Aluminium (kg)	2	5		8.65		18.1		36.8		101.5
Standard Model in Cast Iron (kg)	4.1	9.9		17.6		33.4		71.4		–
Standard Model in Stainless Steel (kg)	–	6.8		15.5		35.9		66.1		137
Drum Pump TD in Aluminium (kg)	3	7		10		–		–		–
Drum Pump TD in AISI 316 (kg)	–	7.5		16		–		–		–
Material of Components
Pump Housing & All Wetted Metal Details	Aluminium & Cast Iron	Aluminium, Cast Iron or Stainless Steel AISI 316L								Aluminium or AISI 316L
Centre Block (Aluminium & Cast Iron Models)	Aluminium (standard) or Cast Iron
Centre Block (Stainless Steel Models)	–	PP (standard), Conductive HDPE or Aluminium
Diaphragms	NBR, FKM, PTFE, PTFE 1705B or EPDM
Valve Balls	NBR, PTFE, AISI 316L****, EPDM, Polyurethane or Ceramic****
Air Valve	Brass/NBR (standard), or AISI 316L/FKM or PET/NBR (standard on TX820), PET/FKM
Gaskets	Klingerseal/NBR (standard), Klingerseal/EPDM, Klingerseal/FKM, FEP/FKM (Stainless Steel pumps)
Housing Screws	Steel on Aluminium &Cast Iron Pumps, A4-80 on Stainless Steel pumps
Diaphragm Shaft	Stainless Steel AISI 316L (TX25, T820)/304L (T70 – T420)
Drum Handle TD Models	Stainless Steel AISI 316					–