Application
Vacuum pumps for sintering and debinding
In sintering, pressed powder parts are heated below the melting point and compacted ā this is how Leybold describes it. Before that, the binder has to come out of the green part: according to Pfeiffer Vacuum, the vacuum extracts the binder and prevents oxidation; Edwards sums up both as removing the binder and compacting. Below you can see how the application works, what vacuum the manufacturers name and which of their series are intended for it ā 187 models from 4 manufacturers.
Compare 187 modelsHow it works
- 187Models
- 11Series
- 4Manufacturers
- ~10ā»ā“ hPaSintering (Pfeiffer Vacuum)
Touch the points: each part of the system explains itself.
In short
Sintering and debinding: the key facts
- CompactingLeybold: powder parts are compacted below the melting point; DRYVAC with RUVAC WH/WSU and SCREWLINE are named.
- DebindingPfeiffer Vacuum: the vacuum extracts the binder and prevents oxidation. Edwards names EXS for debinding and sintering ā removing the binder, compacting.
- About 10ā»ā“ hPaFor sintering, Pfeiffer Vacuum names about 10ā»ā“ hPa.
- Series namedBusch names COBRA, PANDA/PUMA and R5 (in the product finder), Pfeiffer Vacuum DuoVane, HiLobe and UnoLine Plus (BA 501).
Operating principle
How it works: Sintering and debinding
The drawing shows the basic principle in section. The systems and pumps of the individual manufacturers differ in detail.
- DebindingThe furnace is evacuated and slowly heated. The binder leaves the green part and, according to Pfeiffer Vacuum, is extracted by the vacuum; Edwards names the removal of the binder as the first step.
- SinteringAt a higher temperature, the powder parts compact below the melting point (Leybold). With no oxygen in the furnace, they do not oxidise in the process (Pfeiffer Vacuum).
- CoolingThe compacted parts cool down in the furnace, then the furnace is vented and unloaded.
Vacuum and sizing
Sintering and debinding: how much vacuum is needed
What the manufacturers say about pressure, pumping speed and sizing.
What vacuum
For sintering, Pfeiffer Vacuum names about 10ā»ā“ hPa.
Binder and vapours
According to Pfeiffer Vacuum, the vacuum extracts the binder; Edwards names removing the binder and compacting. The binder vapours enter the suction flow ā a separator or filter upstream of the pump retains vapours and powder dust.
Which pumps
Leybold names DRYVAC with RUVAC WH/WSU and SCREWLINE, Edwards EXS, Busch COBRA, PANDA/PUMA and R5 (in the product finder), Pfeiffer Vacuum DuoVane and HiLobe, UnoLine Plus (BA 501) as well as the COMBI family.
Technology
Sintering and debinding: the vacuum pumps the manufacturers name
Listed are the series the manufacturer itself names for this application. āShow only ā¦ā sets the filter of the product overview.
Oil-lubricated rotary vane vacuum pumps
71 models Ā· 1.25ā1,800 mĀ³/h
Roots vacuum pumps
58 models Ā· 210ā13,540 mĀ³/h
Screw vacuum pumps
58 models Ā· 70ā5,760 mĀ³/h
Product overview
Sintering and debinding: all 187 models compared
Use the filters on the left to narrow the selection ā by manufacturer, technology and the modelsā key figures, for 50 or 60 Hz.
Busch COBRA Industry series 36 models
COBRA NS 0070 CPumping speed 70 mĀ³/h 50 Hz85 mĀ³/h 60 HzUltimate pressure 0.03 mbarRated motor power 4 kW 50 Hz4.4 kW 60 HzVariants 
COBRA NC 0100 BPumping speed 110 mĀ³/h 50 Hz130 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 3.5 kW 50 Hz4.8 kW 60 HzVariants 4
COBRA NC 0100 B ECOTORQUEPumping speed 130 mĀ³/h 50 Hz130 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 4.8 kW 50 Hz4.8 kW 60 HzVariants 
COBRA NS 0160 CPumping speed 135 mĀ³/h 50 Hz170 mĀ³/h 60 HzUltimate pressure 0.03 mbarRated motor power 5.5 kW 50 Hz6.6 kW 60 HzVariants 
COBRA NC 0200 BPumping speed 220 mĀ³/h 50 Hz265 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 6 kW 50 Hz7.6 kW 60 HzVariants 4
COBRA NC 0200 B ECOTORQUEPumping speed 265 mĀ³/h 50 Hz265 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.6 kW 50 Hz7.6 kW 60 HzVariants 
COBRA NC 0300 BPumping speed 320 mĀ³/h 50 Hz385 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants 4
COBRA NC 0400 BPumping speed 350 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants 
COBRA NX 0450 APumping speed 350 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 7.5 kW 50 Hz9.5 kW 60 HzVariants 
COBRA NC 0300 B ECOTORQUEPumping speed 385 mĀ³/h 50 Hz385 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants 
COBRA NC 0400 B ECOTORQUEPumping speed 420 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 9.5 kW 50 Hz9.5 kW 60 HzVariants 
COBRA NX 0450 A ECOTORQUEPumping speed 420 mĀ³/h 50 Hz420 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 11 kW 50 Hz11 kW 60 HzVariants 
COBRA NC 0500 BPumping speed 490 mĀ³/h 50 Hz490 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 9 kW 50 Hz9 kW 60 HzVariants 
COBRA NC 0630 C VRPumping speed 580 mĀ³/h 50 Hz680 mĀ³/h 60 HzUltimate pressure 25 mbarRated motor power 22 kW 50 Hz22 kW 60 HzVariants 
COBRA NS 0600 CPumping speed 600 mĀ³/h 50 Hz600 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants 
COBRA NC 0630 CPumping speed 630 mĀ³/h 50 Hz630 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 15 kW 50 Hz17 kW 60 HzVariants 
COBRA NC 0630 C ECOTORQUEPumping speed 630 mĀ³/h 50 Hz630 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 17 kW 50 Hz17 kW 60 HzVariants 
COBRA DX 0650 A PLUSPumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants 
COBRA NX 0650 APumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 12.5 kW 50 Hz15 kW 60 HzVariants 
COBRA NX 0650 A ECOTORQUEPumping speed 650 mĀ³/h 50 Hz650 mĀ³/h 60 HzUltimate pressure 0.1 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants 
COBRA NF 0750 APumping speed 750 mĀ³/h 50 Hz750 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants 
COBRA NC 1000 BPumping speed 840 mĀ³/h 50 Hz1,000 mĀ³/h 60 HzUltimate pressure 0.05 mbarRated motor power 22 kW 50 Hz25 kW 60 HzVariants 
COBRA DX 0950 A PLUSPumping speed 950 mĀ³/h 50 Hz950 mĀ³/h 60 HzUltimate pressure 0.01 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants Busch PANDA/PUMA series 26 models
Busch R5 series 58 models
Edwards EXS series 11 models
Leybold DRYVAC series 9 models
Leybold RUVAC WH/WHU series 7 models
Leybold RUVAC WS/WSU series 8 models
Leybold SCREWLINE series 2 models
Pfeiffer Vacuum DuoVane series 12 models
Pfeiffer Vacuum HiLobe series 17 models
Pfeiffer Vacuum UnoLine Plus series 1 model
No model matches these filters.
Busch COBRA Industry series 36 models
Busch PANDA/PUMA series 26 models
Busch R5 series 58 models
Edwards EXS series 11 models
Leybold DRYVAC series 9 models
Leybold RUVAC WH/WHU series 7 models
Leybold RUVAC WS/WSU series 8 models
Leybold SCREWLINE series 2 models
Pfeiffer Vacuum DuoVane series 12 models
Pfeiffer Vacuum HiLobe series 17 models
Pfeiffer Vacuum UnoLine Plus series 1 model
Models a manufacturer no longer carries in its current range are listed in its āOutdated modelsā section.
Industries
Sintering and debinding: where the manufacturers name it
The manufacturers list these uses on their own pages.
Metallurgy and heat treatment
Busch, Edwards, Leybold and Pfeiffer Vacuum list sintering and debinding under metallurgy and heat treatment ā powder parts are freed of their binder in the vacuum furnace and compacted below the melting point.
Frequently asked questions
Sintering and debinding: frequently asked questions
How does vacuum sintering work?
Pressed powder parts are heated in the vacuum furnace until, according to Leybold, they compact below the melting point. Before that, the binder is removed: according to Pfeiffer Vacuum, the vacuum extracts the binder and prevents oxidation. Edwards describes debinding and sintering as removing the binder and compacting.
How much vacuum is needed for sintering?
For sintering, Pfeiffer Vacuum names about 10ā»ā“ hPa.
Which vacuum pump for sintering and debinding?
Leybold names DRYVAC with RUVAC WH/WSU and SCREWLINE, Edwards EXS, Busch COBRA, PANDA/PUMA and R5, Pfeiffer Vacuum DuoVane, HiLobe and UnoLine Plus (BA 501) as well as the COMBI family.
What is debinding?
The removal of the binder from the pressed powder part before it is sintered. According to Pfeiffer Vacuum, the vacuum extracts the binder; Edwards sums up debinding and sintering as removing the binder and compacting, and names EXS for it.
Why is sintering done under vacuum?
Because there is no oxygen in the furnace: Pfeiffer Vacuum names the prevention of oxidation alongside the extraction of the binder. Leybold describes the result ā powder parts that are compacted below the melting point.
What is the difference between sintering and melting?
In sintering, the material stays solid: according to Leybold, the powder parts are compacted below the melting point. In melting, the metal becomes liquid ā for this the manufacturers name other processes and in some cases other series.
What can be done if binder vapours get into the vacuum pump?
During debinding, the binder enters the suction flow ā Pfeiffer Vacuum describes how the vacuum extracts it. A separator or filter upstream of the pump retains vapours and powder dust.
Which series does Busch name for vacuum sintering?
In its product finder, Busch lists COBRA, PANDA/PUMA and R5 for vacuum sintering without describing the process in more detail.
Which pumps does Leybold name for vacuum sintering?
Leybold names DRYVAC in combination with RUVAC WH/WSU as well as SCREWLINE. Leybold describes vacuum sintering as compacting powder parts below the melting point.
A single pump or a central vacuum system?
A central system in a room of its own keeps noise and heat away from production and matches its output to the demand. Central vacuum systems are planned and built by Eugen Theis Vakuum, a company of the Ehrler & Beck group ā more under Central Vacuum.
Does Ehrler & Beck also supply spare parts and service?
Yes. Ehrler & Beck offers original spare parts and accessories as well as maintenance and repair.
Which pump suits your process?
Tell us the application, the medium and the volume ā we advise you on selection, spare parts and service.
