Metal diaphragm pumps
Design features:
- maximum temperature 120 °C
- maximum pressure 14 bar
- the air mechanism does not require lubrication
- low air consumption
Various connection options:
- standard connection - BSP female thread
- PN10, PN16, ANSI, NPT
- double nozzles
- possibility to rotate the nozzles by 180°
Reliability and durability:
- gentle pumping process:
- the ability to pump viscous products
- valve seats are made of AISI 316 stainless steel and integrated into the pump casing
Durable membranes (diaphragms):
- smooth work surface
- no central through hole
- no metal parts in contact with the pumped liquid
- material suitable for the task
| DM 15/25 ATT-DM1 | |
|---|---|
| DM - DELLMECO pump 15 - Nominal diameter of pump connections 25 - Maximum productivity (at a pressure of 8 bar in the air line) | DM1 - OPTIONS: BC1 - Barrier cameras with sensors (NAMUR standard) BC2 - Option BC1 + controller ВС3 - Option BC2 in explosion-proof version (ATEX) DM1 - Membrane rupture detector (NAMUR - ATEX standard) DM2 - Option DM1 + controller SC1 - Stroke sensor, ATEX SC2 - Option CC1 + beat counter SC3 - Option CC2 in explosion-proof version, ATEX SC5 - Pneumatic stroke sensor with electro-pneumatic pressure transducer SC6 - CC5 option + beat counter F7 - Flange connections for PN10 DIN 2576 pipes F8 - Flange connections for ANSI 150 RF-SO pipes F9 - Flange connections for PN16 DIN 2277/2278 pipes AF1, AF2 - Filter regulator, fittings BF1 - Backflow system, manually operated, with EPDM O-rings BF2 - Backflow system, manually operated, with PTFE O-rings BF3 - Backflow system, manually operated, with FPM O-rings BF5 - Backflow system, manually operated, with PTFE O-rings D - Barrel version HJ - Heating/cooling enclosure NRM, HPS - Version with pressure booster S - Version with double stays Р - Version for transporting bulk materials Т - Version on a stainless steel trolley CLEAN - Assembly in a special dust-free room for special pump applications |
| Р - Body material: A - Aluminium B - Teflon-coated aluminium C - Cast iron S – AISI 316 |
|
| Т - Membrane material (all conductive): Е - EPDM N - NBR T - TFM/PTFE |
|
| S - material and shape of the valves: E - EPDM, spherical shape N - NBR, spherical shape T - Teflon, spherical shape S - AISI 316, spherical shape |
|
| MEMBRANES (DIAPHRAGMS) | OPERATING TEMPERATURE MIN MAX | PARTS IN CONTACT WITH THE PRODUCT |
|---|---|---|
| NBR: Oil and petrol resistant rubber. Good resistance to solvents, lubricants, water, oils. Not suitable for highly polar solvents (acetone, etc.), ozone, chlorinated hydrocarbons and nitrocarbons. | -30°C +90°C | PE (polyethylene) is very strong and extremely resistant to abrasion. The moisture absorption capacity is very low. Good chemical resistance to major chemicals. Only strong oxidants such as nitric acid, sulphuric acid and halogens can damage PE. PE is a competitor to PP (polypropylene), which is often used in the production of pumps. The temperature and chemical parameters of these two materials are believed to be similar. However, the overall similarity of the mechanical properties of these materials is limited: tests based on the interaction of these materials with water and sand have shown that the abrasion resistance of RE is 7 times higher than that of PP and 1.6 times higher than that of steel. RE is also more resistant than, for example, cast iron or aluminium. This high resistance plays an important role in many applications (electroplating baths, printing inks, lime milk, grinding and glazing in the ceramic industry). PTFE is a thermoplastic polymer or tetrafluoroethylene. It has a smooth surface and a very low coefficient of friction. It is physiologically harmless, can be used at high temperatures and has almost universal resistance to chemically aggressive environments. However, it is not very resistant to abrasion and becomes brittle at low temperatures. |
| EPDM: Ethylene propylene diene rubber. Very good chemical resistance. Not suitable for oils and solvents. Resistant to ketones and alcohols. | -40°C +120°C | |
| PTFE: Polytetrafluoroethylene, fluoroplastic. One of the most chemically resistant materials. There are very few substances to which it is not resistant: alkali metals, gaseous fluorine and some fluorinated chemicals such as chlorotrifluoride or oxygen difluoride, which release free fluorine with increasing temperature. | -37°C +120°C |
Pumps made of aluminium, PTFE-coated aluminium and cast iron
| 20/75 | 25/125 | 40/315 | 50/565 | 80/850 | |
|---|---|---|---|---|---|
| Max. capacity, l/minv | 75 | 125 | 315 | 565 | 850 |
| Max. pressure, bar | 8 | ||||
| Size of pipe connections | 3/4" | 1" | 1 1/2" | 2" | 3" |
| Compressed air connection size | R 1/4" | R 1/4" | R 1/2" | R 1/2" | R 3/4" |
| Dry suction height m.in.s. | 3.0 | 4.0 | 4.0 | 5.0 | 5.0 |
| Suction height under the bay, m.in.s. | 9 | ||||
| Max. diameter of solid particles, mm | 4 | 7 | 10 | 12 | 15 |
| Max. operating temperature - NBR, EPDM, °C | 80 | ||||
| Max. operating temperature - PTFE, °C | 120 | 110 | |||
| Weight, kg | 9,5 | 14 | 31 | 70 | 97 |
| Housing material | AISI 316 | AISI 316L | |||
| Material of membranes (diaphragms) | EPDM, NBR, TFM/PTFE | ||||
| Ball valve material | EPDM, NBR, PTFE, AISI 316, PU | EPDM, NBR, PTFE | |||
| Material of the sealing rings | EPDM, NBR, PTFE, FPMPTFE+FPM | ||||
| A | B | C | D | E | F | G | H | I | ØJ | pumps | L | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DM 20/75 | 150 | 171 | 230 | 21 | G 3/4" | 86 | R 1/4" | 212 | 18 | 30 | 118 | 139 |
| DM 25/125 | 200 | 202 | 306 | 29 | G 1" | 117 | R 1/4" | 282 | 28 | 40 | 160 | 164 |
| DM 40/315 | 270 | 267 | 412 | 34 | G 1 1/2" | 110 | R 1/2" | 380 | 28 | 40 | 213 | 213 |
| DM 50/565 | 350 | 345 | 538 | 48 | G 2" | 165 | R 1/2" | 493 | 30 | 60 | 286 | 285 |
| DM 80/850 | 590 | 600 | 1310 | 129 | G 3" | 688 | R 3/4" | 1257 | 30 | 60 | 565 | 575 |
