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What effect does the viscosity have on the delivery capacity?
A reduction in the delivery capacity should be allowed for with pumping mediums with high viscosity. The reduction in the delivery capacity for increasing viscosity of the pumping medium can be read from the diagram below. The appropriate pump size can be selected. In the example, a desired delivery capacity of 200 l/min at a viscosity of 2,000 mPas was taken as a basis. The dashed line crosses the interpretation line for the pump at 248 l/min.
How can I best install and connect my Dellmeco pump?
In order to achieve optimum delivery of your media, we recommend the use of a pulsation damper. This is ideally installed at the pump’s pressure output. In order to avoid the transfer of pump vibrations to your pipes, we recommend flexible connections (hoses or compensators). These should be installed both on the pressure side and on the suction side.
How do I choose the right nominal diameter for the pump?
(Example: 50 l/min, pump height or counter-pressure 4.0 bar)
2) The compressed air volume and compressed air demand can be read from the pump curve
(Example: 0.38 Nm3/min at 6.0 bar)
1” pump curve
Curve determined with water at 20 °C.
What do the Dellmeco product codes consist of?
DM – Dellmeco pump
15 – Nominal diameter, DN
55 – Flow rate in l/min. at 8.0 barP – Housing materials:
A – Aluminum
B – Aluminum PTFE-coated
C – Gray cast iron
H – AISI 316L Hygiene (stainless steel)
P – PE (polyethylene)
R – PE conductive
S – AISI 316 stainless steel
T – PTFE (Teflon)
Z – PTFE conductiveT – Diaphragm materials:
E – EPDM
N – NBR (Buna/Nitrile)
T – TFM/PTFE
S – Ball valve materials:
E – EPDM (ball valve)
N – NBR (ball valve)
S – AISI 316 (ball valve)
T – PTFE (ball valve)
U – Polyurethane (ball valve)
C – Ceramic (ball valve)
F – PTFE (cylinder valve)
P – PE (cylinder valve)
BC1 – barrier chamber with sensors, standard
BC2 – barrier chamber complete with sensors and controller
BC3 – Barrier chamber complete with sensors and controller, ATEX
DM1 – Diaphragm rupture monitoring with sensor (Namur) ATEX
DM2 – Diaphragm rupture monitoring with sensor (Namur) ATEX and controller
F1 – PN10 flange connection with EPDM O-ring
F2 – PN10 flange connection with NBR O-ring
F3 – Flange connection PN10 with FEP/FPM O-ring
F7 – Flange connection PN10 DIN 2576
F8 – Flange connection PN16, ANSI150
F9 – Flange connection PN16 DIN 2277 / 2278
SC1 – Stroke counter sensor (Namur) ATEX
SC2 – SC1 plus stroke counter
SC3 – SC1 plus stroke counter, ATEX
SC5 – Pneumatic stroke counter with pressure transducer
SC6 – SC5 plus stroke counter
BF1 – Residual emptying, manually operated with EPDM seals
BF2 – Residual emptying, manually operated with PTFE seals
BF3 – Residual emptying, manually operated with FPM seals
BF4 – Residual emptying, pneumatic with EPDM seals
BF5 – Residual draining, pneumatic with PTFE seals
AF1, AF2 – Filter regulator with connection nipple
D – Drum pump
HJ – Heating jacket
HP – Compressed air booster
MV – Pump externally controlled by solenoid valve
S – Split connections
P – Powder pump
T – Trolley for diaphragm pump
CLEAN – The “Clean package” is for a special pump application where a particular level of cleanliness is required.
What are the options for the installation of a Dellmeco pump?
The compressed air driven double diaphragm pumps from Dellmeco are dry self-priming. With a full suction line, a suction height of up to 8.0 m WS can be achieved. The suction height varies depending on the diaphragm material and the pumping medium.
The compressed air driven double diaphragm pumps from Dellmeco can be operated submerged in pumping medium. The pump materials should be checked before submerging the pump. The exhaust from the air motor must be channelled into the atmosphere via a separate exhaust air pipe above the liquid level.
The compressed air driven double diaphragm pumps from Dellmeco can be operated with a suction side preliminary pressure of max. 0.6 bar. In order to prevent unwanted volume flow, a shut-off valve should be installed in the suction line.
All data determined with water (1 mPas) at +20 °C
