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factory direct sale high vacuum oil diffusion pump

Min.Order Quantity: 1 Set/Sets factory direct sale high vacuum oil diffusion pump

Supply Ability: 400~700 Set/Sets per Month factory direct sale high vacuum oil diffusion pump

Payment Terms: L/C,T/T,


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high vacuum oil diffusion pump operate in an entirely different way; by heating the fluid (initially mercury and then later the low pressure oils) to a boil, and directing a high speed jet of vapours down onto a condensing surface, they are able to constantly push down air molecules into the bottom of the pump and thus maintain a pressure differential. A mechanical ‘backing pump’ can then remove the trapped air from bottom of the diffusion pump, while the fluid is re-boiled to keep the pump running.

 
Originally Mercury was the fluid of choice, but it had several disadvantages - aside from the toxic vapours it created, and its tendency to amalgamate with metals that could have otherwise been used for the construction of pumps, it was also rather prone to becoming fouled with traces of grease or oil that stopped it working all together.
 
As they were non-toxic, could be used with any type of pump material, and did not get easily fouled by contamination. Refinements were needed to both the oils and the pump designs in order to get the best performance, with some aiming for the lowest vacuum and others for the greatest pumping speed. 
 

 

Item KT-100 KT-160 KT-200 KT-250 KT-300 KT-320 KT-400 KT-500
Ultimate pressure (Pa) 5×10-5
Pumping Capacity (L/S) 550 1800 2800 3500 4600 5000 8500 12000
Critical fore-pump pressure (Pa) 40
Backflow rate mg/(cm2·min) ≤3×10-2
Heating time ( min) ≤30 ≤35 ≤40 ≤45
Heating Power (kw) 0.8-1 1.4-1.6 1.6-1.8 2.2-2.4 2.4-3 4~5 4~5 6~8
Electric Voltage (AC)V 220 380
Pump Oil Model KS-3
Pump Oil Volume ( L) 0.15 0.45 0.55 1-1.4 1-1.6 1.4-1.8 3~4 4
Cooling water consumption (L/H) 180 250 300 350 400 420 500 600
Inlet dimension (mm) 100 160 200 250 300 320 400 500
Outlet dimension (mm) 32 50 65 65 80 80 100 100
Recommended forepump speed (L/s) 4 8 15 15 30 30 70 150
Dimension
(mm)
L(Length) 320 420 530 473 695 725 885 1010
B(Width) 260 315 390 450 505 525 665 815
H(Height) 365 505 575 650 726 830 925 1165
Net weight (kg) 14 31 39 48 89 100 175 185

 


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