Product Details

Automatic backwash muti tanks large sand filter for recirculating water system

Product Description

. Flowrate standard vessels: (Max 175m³/h per unit)

. Filtration grades: depend on water quality ,water flowrate and filter bed type

. Diameter stand vessels:16” - 96”

. Design pressure: 1.0Mpa

Features:

1. Complete filtration solutions; Custom designed,manual or automatic backwash systems,

complete with manifolds, valves and controllers

2. Modularity and flexibility, wide range of vessel types and sizes(diameter 16”-96”) suitable for many filtration applications

3. High quality corrosion resistance vessels, Phosphate pre-treated, Polyester coated steel

4. High efficiency; Advanced design for perfect water distribution during filtering and backwashing

5. All filters are rated to 10 Mpa.

6. Various bed types, Sand, Gravel, Activated Carbon,Anthracite, Basalt, etc.

7. Various connection types, meeting all international standards

8. Meets ISO 9001 standards

Principle descriptions

The Filtering Process

Filtering with media filters, also known as depth filtration, is done by filtering water through a thick layer of graded particles, called the filter bed. These particles can be sand, gravel or other granular materials. The filtration degree depends on the effective size of the bedding and the water velocity through the filter.

Raw water enters from the filter inlet (1) and percolates through the filter bed (2). Suspended materials come into contact and attach to the media particles. Clean water flows through the

filtration nozzles (3) and out of the filter via the outlet valve (4).

The gradual dirt buildup in the filter bed causes an increase in the pressure differential across the filter and when it reaches its maximum design value, a cleaning process should be performed. In automatic media filter installations a pressure differential switch senses the pressure differential and when it reaches a preset value, the self cleaning process begins.

The Cleaning Process

Cleaning is done by backwashing; pressurized water flows in reverse direction – from the nozzles upwards, causing suspension of the filter bed, thus releasing the suspended matter from the bedding. The dirt particles are then washed out of the filter through the back-flush valve. In automatic media filters installations the cleaning process is done by the system’s controller. When the pressure differential switch senses that the differential pressure across the system reached a pre-set value, a signal is sent to the flushing controller and the self cleaning process begins.

Technical parameters

Model	DMFshallow medium filtration system
Flow(max)	175m³/h per unit
Filtration tanks quantities	1-10
Tank diameter	16"(400mm)-96"(2400mm)
Design pressure	1.0Mpa
Backwash pressure(Min)	0.2Mpa
Medium	quartz sand/activated carbon etc
Adjustable flushing time	10-200 seconds
Power supply	220 v / 50 Hz
Control modes	Pressure difference/time/manual/PLC(optional)
Shell material	Carbon steel/304 stainless steel/316L(optional)
Automatic drain valve	Israel

Data sheet(Each model with different size)

Models	Diameter(mm)	Inlet and outlet(mm)	Back washing flow(m³/h)	Filtering area(m²)	Flow (m³/h)
DMF16	400	40/50	6	0.2	6
DMF20	500	50	25	0.3	15
DMF30	750	80	25	0.5	25
DMF36	900	80	35	0.7	35
DMF48	1200	80	50	1.2	50
DMF54	1400	100	72	1.48	72
DMF60	1500	100	90	1.82	90
DMF66	1700	100	108	2.21	108
DMF72	1800	150	128	2.63	128
DMF78	2000	150	150	3.08	150
DMF84	2100	150	175	3.58	175
DMF90	2200	150	200	4.11	200
DMF96	2400	200	228	4.67	228

(Note: Many sets in parallel can gain more flow.

eg: DMF48-4 means there are 4 filtration tanks of 1200mm diameter in parellel)

DMF48-8 means there are 8 tanks in parellel)

Comparing with traditional sand filter

Items	DMF shallow medium filter	Tradional sand filter
Backwash water consumption	0.8%-1.5% of filtration water yield	Over 5%-8%
Status of supplying water	continuously	stoping supplying water when filtering
Floor space	small	Heavy and tall
Operating Weight	2.8T	60T, needing special foundation
Condition	Full-automatic,easy operating	needing complex maintenance

Product selecting

When you are choosing automatic backwash sand filters, please consider the following parameters:

1. Flow capacity( Pipe diameter)

2. Filtration range

3. Shell material

4. Pipeline pressure

5. Chemical properties of the filter medium

6. Suspended solids(SS) concentration of filter medium

Product pictures

Application case: cooling tower recirculating water bypass filtration

Packaging & Shipping

Our Services

1.OEM/ODM is availlable.

2.Service for you at any time with an excellent sales team.

Company Information

1. Our factory covers an area of 13000 square which is domestic largest water filter production base.

2. The main products have self-cleaning filter,disc filter,sand filter etc.

3. We have a few professional engineers with over ten years experience in water filtration technology.

4. Our products have been widely used in circulating water,Ro pretreatment,agricultural irrigation,pre-treatment of sea water desalinization , wastewater treatment and so on.

FAQ

Q: Where is your factory?
A:Changsha city,Hunan province, China

Q:Can you accept OEM?
A:Yes.We could do OEM for you.

Q: Do you have a certification?
A: Yes. we have ISO / CE certificate and certificate of patent.

Q: How about the delivery time?
A: Usually 7-15 days after prepayment is confirmed.

Q:Do you have a design team?
A:Yes,we have.Providing outline drawing,electric drawing and others.

Q:Can you send me a sample?
A: Yes.But it is not for free.

Q. :What is your payment?
A: T/T,T/C,Western Union,Paypal.

Q:How can I contact you?
A:You could contact me by email or Trademanager or others.