LDS series Multi-effect water distiller adopted the purified water as the feed water , produced WFI by heating industrial steam. The product satisfies the requirement of CGMP(CP2010), USP34AND EP7.

Working principle
The qualified feed water is input into the condenser after increased the pressure by multilevel pump. And then enters into each preheater(the feed water will be heated by the secondary steam and distilled water in the condenser, in the first stage preheater, the feed water heated by the industrial steam condensate water, after enters the other stages preheater, it is heated by the secondary steam condensate water). Next the feed water in input into the water distributor of the 1st stage evaporator, which is spouted to the inside of the heating tubes and flowed as film. The produced second steam with drips enters into the gas and steam separating setting from the bottom of the heating tubes. The separated pure steam enters into the next stage as heating steam, meanwhile, the feed water, which is not evaporated, enters into the next stage. And then it is repeated above mentioned process. The pure steam from last stage is converged with each stage condensed water(except 1" stage), after cooling and drainage of the non-condensable gas, (according to different model, there should be a device for discharge the non-condensable gas continuously) it is became the WFI. There is an on-line conductivity test at the output orifice, the qualified distilled water will be output as the WFI, and the unqualified will be discharged.

Water- output(L/h)	Multi-effect		Raw steam consumption L/h	Pure steam output L/h	Distilled water outpet L/h	Raw water consumption L/h	Cooling water consumption L/h	Power KW
50		3	121	34	59	65	0	0.37
300		3	155	135	>350	420	0	0.75
		4	120				0
500		4	195	210	>600	720	0	1.1
		5	165				0
		6	140				0
1000		4	390	320	>1200	1500	0	1.5
		5	420				0
		6	295				0
1500		4	590	425	>1800	2160	0	1.5
		5	500				0
		6	450				0
2000		4	790	525	>2500	3000	0	2.2
		5	670				0
		6	600				0
3000		4	1180	640	>3600	4320	0
		5	1000				0
		6	900				0
Raw steam consumption pressure ( MPa )				(work pressure 0.2～0.5MPa, design pressure 0.55MPa)
Raw&Cooling water quality				deionized water, electric conductivity<5μS/cm
Raw&Cooling water temperature				15～25℃
Distilled water temperature				92～98℃