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


Reliable compact design

DC50 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 finer flow adjustment using regulating air pressure.

Pump wetted materials are compatible with the most aggressive fluids and are suitable for use in corrosive environments. Ai 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 50 l/min (14 US gal/min)
Delivery per stroke approx. 0,1 litres (0.026 US gal)
Delivery per cycle (2 x strokes) 0,2 litres (0.05 US gal)
Air pressure operating range 1,5 to 7 bar (22 to 100 psi)
Solids in suspension max. size 3 mm (1/8")
Maximum dry suction lift 6 m (20’)
Maximum wet suction lift 8 m (26’)
Weight 2,2 kg (4.85 lb)
Fluid inlet connection 1/2" BSP/NPT (F)
Fluid outlet connection 1/2" BSP/NPT (F)
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*
156
162
209
105
122
8
G
H
I
J
L
140
83
176
1/2"(F)
3/8"(F)

RECOMMENDED MODELS

MODEL PUMP BODY DIAPHRAGMS BALLS SEATS OTHER WETTED MATERIALS RECOMMENDED APPLICATIONS
DC50PPSESTMBAS Polypropylene Santoprene® PTFE Stainless Steel EPDM Water based fluids and adhesives, diluted alkalis and acids, alcohols and water based coatings.
DC50PPSTSTTBAS Polypropylene PTFE PTFE Stainless Steel Stainless Steel Wide chemical compatibility. Good with acids and alkalis
DC50PPYTWTTBAS Polypropylene PTFE PTFE PVDF Hastelloy® C CIPs chlorinated cleaning agents and home & industrial cleaning agents. Acids and alkalis.
DC50PDSTSTTBAS Conductive Acetal PTFE PTFE Stainless Steel 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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