Deep bed filters for sand and anthracite water

Dual deep bed filter with manual valve

$1.00

Dual sand and anthracite bed filtration with manual control

The Carbotecnia dual-loaded filter is ideal for use in applications where the water contains a high concentration of suspended solids and when the filtration rate is high.

Dual bed filters provide high filtration efficiency compared to sand filters. Because anthracite is a coarser media than sand, larger spaces are formed between the grains, resulting in a higher suspended solids holding capacity without saturating the top layer of the filter. While the sand bed below the anthracite is responsible for retaining the smaller suspended particles that managed to pass the upper bed. The result of utilizing the full depth of the filter is a lower initial pressure drop and longer times between backwashes.

Advantages	Applications
High efficiency in the retention of suspended solids at high filtration velocities. Filtration between 20 – 30 microns. Dual filters have a higher solids holding capacity than conventional sand filters. Longer filtration cycles between backwashes with minimal pressure drop.	Drinking water filtration. Process water filtration. Effluent filtration. Swimming pool filtration. Retention and reduction of suspended particles in water.

Description

The manual deep bed filter with dual loading.

This deep bed filter is a simple single tank unit with Carbotecnia dual loading and manual control valve. Recommended for domestic or commercial use, and operation less than 23 h.

This filter consists of a bed of number one anthracite with an effective size (E.T.) of 0.85 – 0.95 mm; placed on a bed of 16 x 35 U.S. Std. silica sand. Mesh with an E.T. of 0.44 – 0.52mm, 1/8 x 1/16 U.S. Std. silica gravel is used in this filter. Mesh as a support medium.

The granular media used in the Carbotecnia dual bed are evaluated in accordance with the quality parameters specified by AWWA in standard B-100.

Code	Tank size (in)	Bed volume (ft3)	Normal service flow (lpm)	Normal service flow (gpm)	Maximum service flow (lpm)	Maximum service flow (gpm)	Backwash flow (lpm)	Backwash flow (gpm)	Manual Valve	Input/Output Connections	Connections Drainage
P_611001	8×44	0.75	9	2.5	13.2	3.5	26.5	7	Purago F1	1″	1″
P_611002	9×48	1	12	3.1	16.7	4.4	34.07	9	Purago F1	1″	1″
P_611003	10×54	1.5	15	3.9	20.8	5.5	37.85	10	Purago F1	1″	1″
P_611004	12×52	2	21	5.5	29.9	7.9	56.78	15	Purago F1	1″	1″
P_611005	13×54	2.5	24	6.4	34.8	9.2	71.92	19	Purago F1	1″	1″
P_611006	14×65	3	28	7.5	40.5	10.7	83.27	22	Purago F2	2″	2″
P_611007	16×65	4	37	9.8	53	14	109.77	29	Purago F2	2″	2″
P_611008	18×65	5	47	12.4	67	17.7	140.05	37	Purago F2	2″	2″
P_611009	21×62	7	64	16.9	91.2	24.1	166.54	44	Purago F2	2″	2″

Components of a deep bed filter:

Fiberglass tank: made of a single piece lined with fiberglass for mechanical resistance and an inner polyethylene cover. It is maintenance free. Max. operating pressure 150 psi.

Head or control valve: it is the component in which the inlet, outlet and drain connections are made; it allows us to change between the different service or backwash positions, manually or programmed to do it automatically. Max. operating pressure 125 psi.

Granular filter media: it is a bed consisting of anthracite number one with an E.T. of 0.85 – 0.95 mm and silica sand 16 x 35 U.S. Std. Mesh with T.E. of 0.44 – 0.52mm.

Lower distributor and distribution pipe: The distributor is a micro-grooved element, placed at the bottom of the tank, which allows a correct distribution of the flow in the backwash position and operates as a physical barrier that does not allow the granular medium to escape to the outlet line in the service position. There are simple, stack type distributors or distributors with lateral tubes, spider type; their selection depends on the service and backwash flow, as well as the diameter of the tank. Its material of construction is HDPE or ABS. The central pipe is a PVC Ced pipe. 40 connecting the lower distributor to the control head or valve.

Backing gravel: 1/8 x 1/16 U.S. Std. silica gravel, 1/8 x 1/16 U.S. Std. Mesh as a support medium. Having a micro-grooved distributor eliminates the need to place several beds of gravel of different grain size to avoid loss of material.