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01 - AIR OPERATED DOUBLE DIAPHRAGM PUMPS WITH CENTRAL FLOW TECHNOLOGY • DIRECTFLO®


Reliable compact design

DC20 PLASTIC PUMPS

Air operated double diaphragm pumps for dosing and transferring a wide variety of fluids.

For OEM applications and industrial processes with lower flow rates.
Unbalanced spool valve air motor requires lower start-up pressure for fine flow adjustment using regulating air pressure.

Pump wetted materials are compatible with the most aggressive fluids and are suitable for use in corrosive environments. Air motor (directional air valve and air chamber covers) is made of polypropylene.

Fully groundable ATEX certified pumps are available for use in potentially explosive atmospheres (Ex II2 GD IIB/IIC 95 ˚C).

TECHNICAL DATA
Pressure ratio 1:1
Maximum free delivery 20 l/min (5 US gal/min)
Delivery per stroke approx. 0,03 litres (0.008 US gal)
Delivery per cycle (2 x strokes) 0,06 litres (0.016 US gal)
Air pressure operating range 1,5 to 7 bar (22 to 100 psi)
Solids in suspension max. size 2 mm (3/32")
Maximum dry suction lift 2 m (6 1/2’)
Maximum wet suction lift 7 m (23’)
Weight 1,2 kg (2.65 lb)
Fluid inlet connection Int.: 1/4" BSP/NPT (F) / Ext.: 3/4" NPT (M)
Fluid outlet connection Int.: 1/4" BSP/NPT (F) / Ext.: 3/4" NPT (M)
Air inlet connection 3/8" NPSM (F)
Wetted part materials See recommended models

(*) Data measured with water, air inlet pressure 7 bar (100 psi), 20 ºC (68 ºF).
PERFORMANCE CURVES.
DIMENSIONS (mm)
A
B
C
D
E
F
108
142
29
142
173
86
G
H*
J
96
9
1/4"-3/4"(F)

RECOMMENDED MODELS

MODEL PUMP BODY DIAPHRAGMS BALLS SEATS OTHER WETTED MATERIALS RECOMMENDED APPLICATIONS
DC20PPSEPTMBAS Polypropylene Santoprene® PTFE Polypropylene Stainless Steel, EPDM. Water based fluids and adhesives, diluted alkalis and acids, alcohols and water based coatings.
DC20PPSVPTHBAS Polypropylene TPE PTFE Polypropylene Stainless Steel,FKM. Non aggressive aqueous chemical solutions, water.
DC20PPSTPTTBAS Polypropylene PTFE PTFE Polypropylene Stainless Steel Wide chemical compatibility. Good with acids and alkalis.
DC20PPYTPTTBAS Polypropylene PTFE PTFE Polypropylene Hastelloy® C. CIPs chlorinated cleaning agents and home industrial cleaning agents. Acids and alkalis.
DC20PWYTWTTBAS PVDF PTFE PTFE PVDF Hastelloy® C. Almost universal chemical pump, including strong acids and alkalis above room temperature. Not recommended for some strong alkalis or concentrated nitric acid.
DC20PDSTCTTBAS Conductive Acetal PTFE PTFE Acetal Stainless Steel. ATEX pump. Solvents (most ketones, acetates, aldehydes, aromatic and chlorinated hydrocarbons), solvent and water based flexo and gravure inks, varnishes and paint.

(*) ATEX certifiedversions available,
Ex II2 GD IIB/IIC 95 ˚C
Samoa Industrial, S.A.
Pol. Ind. Porceyo, I-14 · Camino del Fontán, 831
E-33392 - GIJÓN (Asturias) SPAIN
Tel.: +34 985 381 488
(Designs, pictures, dimensions and texts are not binding)
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