Sands for Water Filtration
Sand filters are used to treat drinking water in many developed and well as developing countries and they work by using a complex biological film that grows naturally on the surface of the sand. The sand itself does not perform any filtration function but acts as a substrate. However the grading of the sand in filter beds is the most crucial element of any filter plant, which will determine the functionality and longevity of the plant. They are often the preferred technology in many developing countries because of their low energy requirements and robust performance. Following are some of standard ranges of Filter Media Sand & Gravel we are generally producing:
FILTER SAND:
| No. | Size (mm) | Effective Size (mm) | Hydraulic Size (mm) |
|---|---|---|---|
| 1 | 0.425 – 0.85 | 0.44 – 0.54 | 0.522 – 0.64 |
| 2 | 0.50 – 1.00 | 0.522 – 0.64 | 0.62 – 0.76 |
| 3 | 0.60 – 1.18 | 0.62 – 0.76 | 0.73 – 0.89 |
| 4 | 0.71 – 1.40 | 0.73 – 0.89 | 0.87 – 1.07 |
| 5 | 0.85 – 1.70 | 0.87 – 1.07 | 1.03 – 1.254 |
| 6 | 1.00 – 2.00 | 1.03 – 1.254 | 1.224 – 1.50 |
| 7 | 1.18 – 2.36 | 1.25 – 1.55 | 1.50 – 1.78 |
| 8 | 1.40 – 2.80 | 1.40 – 1.705 | 1.62 – 1.98 |
FILTER GRAVEL:
| No. | Size (mm) |
|---|---|
| 1 | 2.00 – 3.50 |
| 2 | 3.50 – 7.00 |
| 3 | 6.70 – 13.20 |
| 4 | 13.20 – 20.0 |
Golf Course Sands
Omar Associates is the only company in Pakistan with the ability to provide a full range of golf course sands and mixes as per USGA standards.
Rootzone Material
Custom rootzone mixes can be produced to meet all sorts of different requirements. Rootzone sand should allow for the following properties:
- A uniform putting surface
- Be able to play immediately after a rainfall
- Have resiliency so that the ball “holds”
- Have a non-compacting surface
- A surface that can be watered quickly
- Maintain adequate moisture and nutrient reserves during stress
- Produce and maintain uniform cover
- Produce active points for new growth and allow extensive root systems
Our sand is:
- Properly graded
- Chemically balanced
- Sub angular to sub-rounded
- Slightly acidic pH
- Environmentally friendly
Qualities of our Rootzone Mixes:
- Moisture retention
- Nutrient retention
- Stability
- Superior Quality Control
We also provide bunker sands as well as fairway sands. Meticulous attention to detail is given to correct particle sizing and proper blending to ensure the highest quality for the demanding needs of the golf course industry. Currently our sand is being used in the following golf courses:
- DHA Country Club
- Bahria Town Golf Course
- Rumanza Golf & Country Club
Other Specialty Sands
Silica is the most commonly used construction material and has a broad range of applications. As long as grading curves and particle sizes can be maintained and controlled, sands can be used very effectively for a variety of purposes. Given our decades old experience in the field, we can provide specialty sands to all industries.
Other varieties of sands we can produce as per customer specifications include:
- Well Packing sands
- Blasting sands
- Aggregate sands
- Epoxy sands