Principle
Adopts refined quartz sand (silicon content more than 98% or higher) filter material to remove larger particles suspended matter in raw water, sediment, impurities, etc., to reduce the turbidity of water. But also can make the water of organic matter, bacteria, viruses, etc. With the loss of the turbidity by a large number of removal, and create a good condition for filter after disinfection.

Technical parameters

Run cleaning method and steps
Suggest washing cycle: 1/24 hours

Suggested replacement cycle: in order to ensure the normal filtering effect of replacement of a filter material every year.

The operation of the sand filter operation
Sand filter operation and operation includes backwashing, is to wash the three steps

1) When backwashing back washing will RO system start switch selection in the "clean" position, the first open backwashing on the valve and the valve closed after sand fill valve, water valve, with no normal particle filter material in backwash drainage in the limit, control backwashing water flow. Sand during backwashing, slowly open the inlet valve, oil-free compressed air high-speed mixed backwashing water scrubbing, filter material for about 5 minutes in reverse washing should be regularly check filter backwashing drainage in the presence of normal grain of sand, in case the filter material and loss. This process is about 15 minutes, wash effect is a standard with the water outlet of the clear.

2) Positive when the washing is washing the system start switch selection in the "clean" position, turn off after backwashing valve on the valve and open the sand fill valve, discharge valve, the maintain is 10 to 15 m/h water speed. After washing to clean water, can be put into operation. No filter material is washed, drainage should be, otherwise it may be because filter backwashing improper operation and cause damage of bottom water distribution device. Should stop at this time is after wash, to find out the reason and handle, is wash again. The process about 10 minutes, wash effect is a standard with the water outlet of the clear.

3) Run will start switch system selection in the "run" position, the control flow for 10 to 12 m/h. After open sand fill valve, water valve first close the discharge valve. Control of operation cycle, with its head loss to permissible limit (generally should be less than 0.05 MPA) or run in a certain time for backwashing.

Remind
There are many factors affecting the operation of sand filter filtration velocity, the uniformity of backwashing and water, etc.

1) The speed of the sand filter speed cannot too slow. Because the Filter Speed too slow, the unit processing water filter area is small. In order to achieve a certain amount of water yield, is bound to increase the filter area, also will increase investment. But if the filter speed too fast, not only increased the head loss, filtering cycle is shorten, and make the water quality and quantity will be reduced. The filter speed usually selected 10 to 12 m/h.

2) The backwashing back washing is used to remove the filter layer of sludge, to resume the filtering capability of filter material. In order to put the sludge is rinsed clean, must want to have a certain amount of washing speed and time. The filter material size, relative density and expansion ratio and water temperature. Using quartz sand backwashing strength of 15 l/(m2, s). Backwashing, the inflation rate is 25% - 25% of filter and backwashing time 5-6 min. Only good backwashing effect, makes sand filter as well.

3) The uniformity of flow Whether it's running or backwashing, require each cross section of uniform flow distribution. To make uniform flow, main is to good drainage system. The uniformity of flow only, ability makes good filtering effect.

Packing:the seller packs all of the machine and parts in the firm case that suitable for sea shipping.
Delivery date:20-30 working days after receive the deposit.

Q:Are you manufacture or trading company?
A:We are factory, we have our own design team and own workshop.

Q:What kind of payment terms do we accept?
A:50%T/T as advance payment,50% before shipment.we also accept Western Union and Money Gram.

Q:How much is the transportation freight?
A:The freight depends on the quantity, weight and size ,also the destination port.

Q:How about the working life of machine?
A:Our machine can be used for over 5 years.

Q:How can I trust your company and ensure to get the goods if order from you?
A:We are Alibaba legitimate certification company(VIP).

Q:How to ensure that I received the machine undamaged?
A:Our package is standard for shipping .

Q:What's your delivery time?
A:20-30 working days according to your quantity.

Q:Can I have my own customized product?
A:Yes, your customized requirements for logo, design and mark etc.are very welcome.

Q:Do you provide installation & debugging service?
A:Yeah,we will send you the installation drawing and documents first, if you still have problems, we will arrange our engineers go to your place for installation guiding.

Factory (Welcome to visit)
We have own factory and skilled workers,rich-experienced design team and good after service. We are a professional sales team with high efficiency, and endeavoring to provide satisfactory services to every of our customers as always.

Quality and Price 
Our good quality is built on superior material, imported from Japan, French and so on.We pass ISO9001,CE, GMP. Our price is based on the quality,we give the reasonable price to every customer!

Product  range
We can provide various kinds of stainless products for your choice.Also,we can customize according to your specific requirements.

Service
1,We have professional engineers and high-quality sales team who are good at English to ensure zero communication barriers to you .

2,Any damage or shortage of our goods when you receive your items, please take some photos for a witness.We will deal with it in 24 hours.

3,If the machine broken in 1 year (from you buy the machine that day ), we will offer the repair.

4,We offer the video to you  teach you how to use ,fix ,maintain this machine.

5,When the machine broken suddenly ,We offer the instruction teach you how to deal with the emergency.