What size should the pre-treatment FRP tank be?

Sand filters, activated carbon filters, security filters and resin FRP tank model selection mainly depends on the RO terminal water flow to RO equipment to calculate the utilization rate of water pretreatment flow. General small RO water utilization rate of about 50 – 60%, large systems in 75%, up to 80%. Examples of related issues:

Assuming that a RO water production of 3 tons / h, the recovery rate of 75%, pre-treatment water production of 4 tons / h.

Sand filter

◆ Sand filter general design flow rate take 8–10m/h, here the water production 4 tons / h, according to Q = SV

According to Q=SV, Q flow, S tank cross-sectional area, V design flow rate, S= π R^2 tank diameter d=2R], you can calculate the diameter of the tank, and the height can be checked in the manufacturer’s manual.

Activated carbon filter

◆ Activated carbon filter general design flow rate to take 10–12m / h, where the water production of 4 tons / h, according to Q = SV [Q flow, S tank cross-sectional area, V design flow rate, the water production of 4 tons / h, S = π R ^ 2 canister diameter d = 2R] can calculate the diameter of the canister, the height of the manufacturer’s manual.

Water Softener

◆ Softener general design flow rate to take 15–20m / h, where the water production of 4 tons / h, according to Q = SV [Q flow, S tank cross-sectional area, V design flow rate, S = π R ^ 2 tank diameter d = 2R] can be calculated to the diameter of the tank, the height of the manufacturer’s manual to check.

It is worth noting that: according to the above algorithm to calculate the size of the three FRP tanks are not the same.

In order to make the equipment more beautiful we generally choose the largest size FRP tank to achieve the flow rate.

But there are many suppliers on the market is to choose a smaller FRP tank, the reason is to reduce costs and save space in the design to improve the design flow rate, so that the performance of the equipment will deteriorate.