FT-AR-18X35

Silica filter sand 18 x 35

Name: Silica filter sand 18 x 35 – 0.50 to 1.00 mm
Brand: Harpon
SKU: FT-AR-18X35

0.50 to 1.00 mm

Filter sand for water: quartz and silica by grain size · view all (7)

High-purity silica sand, greyish white, 0.50 to 1.00 mm (18 x 35 mesh), for industrial pressure filters and pretreatment. Free of organic matter and carbonates, it does not change the colour, hardness or pH of the water. Washed, dried, screened and with a batch report.

High-purity silica: suited to process water and reverse osmosis and boiler pretreatment
Slightly larger grain than 20 x 40: more flow per area in a pressure filter
No carbonates: does not raise water hardness
Batch report with grading curve
25 kg bags, 1 t big bags or bulk

Price on request/ton

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Batch report with every delivery
Lead time and freight in the quote

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Specifications

Part number	FT-AR-18X35
Grading	0.50 to 1.00 mm
Sieves (mesh)	18 x 35 (ASTM/Tyler)
Typical effective size*	0.55 to 0.65 mm
Typical uniformity coefficient*	up to 1.6
Grain shape	Sub-rounded
Material	Natural quartz/silica sand, washed, dried and graded
SiO₂ content	95 a 99%
Specific gravity	≈ 2.65 g/cm³ (quartz)
Hardness	Mohs 7
Purity	No clay, organic matter or carbonates; no chemical additives
Use in the filter	Industrial pressure filters (closed vessels), water pretreatment for boilers and reverse osmosis, reuse water filters, swimming pool filters
Packaging	25 kg bags, 1 t big bags or bulk (m³)
Reference standard	ABNT NBR 11799 (filter media); AWWA B100 when the design requires
Report	Batch grading curve, with effective size and uniformity coefficient
Application	Water filtration

How to choose

Order the sand by the filter design: grading (range in mm or mesh), effective size and uniformity coefficient.
New bed: build from the bottom up, from coarsest to finest grain, levelling each layer before the next.
Before putting the filter into service, backwash until the water runs clear: it removes the fine dust from the charge.
Store the bags covered and on pallets: wet sand weighs more and cakes.

Other filter sand

FT-AR-8X20 · Filter sandCoarse filter sand 8 x 20 – 0.84 to 2.38 mm

On request Get a quote
FT-AR-0615 · Filter sandFilter sand 0.60 to 1.50 mm – big bag

On request Get a quote
FT-AR-12X20 · Filter sandFilter sand 12 x 20 – 0.84 to 1.68 mm

On request Get a quote
FT-AR-18X50 · Filter sandFilter sand 18 x 50 – 0.30 to 1.20 mm

On request Get a quote
FT-AR-20X40 · Filter sandFilter sand 20 x 40 – 0.42 to 0.84 mm

On request Get a quote
FT-AR-4X8 · Filter sandQuartz filter grit 4 x 8 – 2.38 to 4.76 mm

On request Get a quote

Frequently asked questions

Can I use it in my boiler's pressure filter?

Yes. It is the usual pressure filter charge for feed and make-up water, ahead of the softener or reverse osmosis. Check the grading specified by the filter manufacturer.

Does it work in a swimming pool filter?

Yes: the 0.5 to 1.0 mm range is the one used in most pool sand filters. Follow the charge in kg shown on the filter label.

Can't find the part?

Send us the part number, the machine brand or a photo of the part. We will locate it and quote.

Part not in the catalog

On requestFT-AR-18X35