Cylindrical Mild Steel Multigrade Sand Filter

cylindrical Mild steel Multigrade Sand Filter

The Multigrade Sand Filter is a depth filter that makes use of coarse and fine media mixed together in a fixed proportion. This arrangement produces a filter bed with adequate pore dimensions for retaining both large and small suspended particles. This filter performs at a substantially higher specific flow rate than conventional filters. Specific flow rates of 15-30m/h have been successfully obtained for treating water containing 50-25ppm suspended solids respectively to produce a filtrate with less than 5ppm.

Features : ？ Higher specific velocity. ？ Raw water can be used for backwashing the filter. Advantages : ？ Higher specific flow rate than conventional down flow filters thereby saving on Space & cost. ？ Very little maintenance required. ？ Lower backwash water requirement. ？ In most cases, raw water can be used for backwash. Applications : ？ The Multigrade sand filters filter is an ideal choice for all applications where a conventional sand filter is used. ？ It is extensively used in side stream filtration of cooling water & in potable water treatment. ？ It is ideal for filtration of clarified water. ？ In addition it finds application in sea water filtration & in filtration of chemical solutions. ？ For these types of filtrations rubber lined or epoxy painted filters can be offered.

Working principle:


For the by-pass filtration, the filter is installed in the main circulating pipeline to filter all the circulating water,
 but apart of the circulating water led from the main circulating pipeline is filtered, which is a repeated 
circulatininterception step by step to filter the impurities within the system and finally remove the impurities
 by thenecessary backwash out of the system. Installing a by-pass filter in the circulating water system can 
prevent the terminal pipe of device from sludge blocking and remove the impurities in the system with 
chemical dosing.
By-pass filtration is used to reduce the turbidity of the water circulation system, exactly, to reduce slime 
and 
prevent its deposition in the heat exchanger, so that the effect of agent will be better.
 
 
Generally speaking, if your filter is a quartz sand filter, it usually has two main functions:
1. To reduce suspended solids (turbidity). Otherwise, as the system is running, suspended solids increases
, which will exacerbate the deposition and other problems.
2. Degreasing. Especially the oily turbid circulation, such as steel rolling and continuous casting, has high 
oil content and is easy for breeding microorganism and blocking the nozzles.





Parameters 
Pressure rating: 0.25Mpa~2.5Mpa
Single filter flow :2-50 m3/hour 
Working temperature range: 0 ~ 65 °C
Effluent turbidity:less-than 3
Inlet and outlet Connection: flange
Backwash water: for total filtered water 1 to 3%
Control mode: pressure control; PLC timing control
Sewage way: automatic
Rated operation voltage: can be customized

Model	Flow Rate     (m3/H)	Inlet and outlet (mm)	Filter area (m2)	Diameter (mm)	Height (mm)
YLD-SF-800	15-25	50	0.5	800	960
YLD-SF-1000	23-39	50	0.79	1000	1200
YLD-SF-1200	33-55	80	1.13	1200	1400
YLD-SF-1400	45-75	100	1.54	1400	1600
YLD-SF-1600	60-100	100	2.01	1600	1800
YLD-SF-1800	75-125	150	2.54	1800	1950
YLD-SF-2000	95-155	150	3.14	2000	2150
YLD-SF-2200	115-190	150	3.80	2200	2250
YLD-SF-2400	130-210	150	4.52	2400	2300
YLD-SF-2600	145-225	150	5.3	2600	2400
YLD-SF-2800	155-240	200	6.15	2800	2500
YLD-SF-3000	170-255	200	7.00	3000	2600