2
855 822 R. 12/13
Samson Corporation • One Samson Way • N.C. 28778 Swannanoa USA • Phone (828) 686-8511 • Fax (828) 686-8533
2013_12_17-16:30
Warnings and cautions
In this document you will find warnings and cautions for installation, use
and maintenance of the Direcflo pumps.
This symbol aware that there is a danger of serious bodily injury or death
if you ignore the warning described.
This symbol aware that there is a danger of personal injury or property
damage if you ignore the caution described.
• This equipment is for professional use only
• Do not degrade the integrity of the equipment. Use only original
replacement components from Samson Corporation.
• Fluids not suitable for the pump can cause damage to the pump unit
and involve risk of serious personal injury.
• Always consult Samson Corporation if you have any questions about
the compatibility within the fluids and the pump materials, including
elastomers.
• Install and use the pump according to all local and national regulations
and abide all health and safety laws or legislation.
• The pump can produce fluid pressures equal to the air supply pressure.
Do not exceed the maximum allowable pressure of 100 psi (7 bar) air
supply. The total hydraulic pressure (differential pressure + system)
should never exceed 100 psi (7 bar).
• Never use a pump that leaks, that is damaged, that is corroded or
otherwise it may lack the capacity to contain the fluid.
• Frequently check that the bolts on the diaphragm cover of the pump are
torqued correctly.
Warning
Caution
• Do not use a model with aluminium wetted surfaces to pump fluids for
human consumption, there is a possibility of trace contamination of lead.
• Danger of explosion if used 1,1,1-trichloroethane, methylene chloride
or other halogenated hydrocarbon solvents with aluminium wetted
materials. It could cause serious injury and property damage.
• Inside the pump, diaphragms separate the fluid that is being pumped
from the air supply. If a diaphragm breaks, the fluid can leak out of the
air exhaust and contaminate the environment.
• When handling hazardous fluids, always route the air exhaust into a
suitable container and locate it in a safe place.
• When the fluid source level is situated higher than the pump, (flooded
suction), the outlet tank must be at a higher level than the product to
prevent spills.
• For pumps handling hazardous fluids that are a danger to humans or to
the environment, install a suitable container surrounding the pump to
prevent any leaks or spills.
• Ensure that the operators of this equipment are trained on the operation
and limitations. Use safety equipment as safety goggles or other
equipment required.
Carefully read the instructions and warnings before operating the equipment!
Warning
Here’s the meaning of symbols you may find in this document and general
warnings that you should keep in mind.
Description
Air operated double diaphragm pumps are air-powered, reciprocating
positive displacement pumps with two pumping chambers. Two
diaphragms, centrally located in the chambers, separate the compressed
air (dry side) from the fluid being pumped (wet side). A shaft transmits
the reciprocating motion of one diaphragm to the other. A directional valve
alternatively distributes the air from one chamber to the other; thus a
reciprocating movement of the diaphragms is created. With each stroke,
fluid is discharged by one of the diaphragms whilst the opposite
diaphragm sucks new fluid into the expanding chamber. Check valves, two
on the discharge side and two on the suction side, control and direct the
fluid flow.
Material
Temperature range
PTFE
5 ºC - 105 ºC / 41 ºF - 221 ºF
NBR
10 ºC - 80 ºC / 50 ºF - 176 ºF
Acetal
10 ºC - 90 ºC / 50 ºF - 194 ºF
Hytrel
®
10 ºC - 90 ºC / 50 ºF - 194 ºF
Neopreno
-18 ºC - 93 ºC / 0 ºF - 200 ºF
Santoprene
®
-29 ºC - 135 ºC / -20 ºF - 275 ºF
Viton
®
-10 ºC - 120 ºC / -4 ºF - 248 ºF
Polypropylene
®
10 ºC - 80 ºC / 50 ºF - 176 ºF