Pressure Sand Filter

Pressure Sand Filters

Sand filtration is a frequently used very robust method to remove suspended solids from water.
The filtration medium consists of a multiple layer of sand with a variety in size and specific gravity.
Applications for sand filtration:

  • Preparation of cooling water
  • Treatment of waste water
  • Production of drinking water
  • Filtration in swimming pools
  • Pre filtration for membrane systems
  • Filtration of grey or surface water

Depending on the type of water, suspended solids concentration, oil and grease, COD/ BOD, iron contents, sand filters are sized differently, but the basic design data to clarify natural waters are the following:

Filtration velocity 6-15 m3/h.m2
Diameter 1 to 3m
Filtration area 0.8 to 7 m2
Flow rates 10 to 100 m3/h
Pressure ratings 4 to10 bar
Vessel Materials Epoxy-coated steel
Polyester composite
Stainless steel (on request)
Bed depth 1 meter min.
Filtration media Anthracite 1.4-1.5 mm

Sand 0.4-0.8 mm

Sand 1.0-2.0 mm

Gravel 2.0-3.15 mm

Gravel 3.15-5.6 mm

Top manhole 2 1/2 to 6″
Accessories 5-ball or butterfly valves
Options Manometers, degaser, flowmeter
Control Automatic or manual backwash, on timer and/or differential pressure

 

Operation Specifications:

  • Operating pressure: 25-100 psi (1.73-6.9 bar)
  • Operating temperature: 41-122°F (5-50°C)
  • Electrical supply: 220V/1Ph/50Hz

Standard Features:

  • Time controller for backwash scheduling
  • High performance FRP tank/MSEP/SS316/SS304
  • 220V/1Ph/50Hz
  • Automatic backwash valve
  • High quality media
  • Operating pressure: 25 – 125 psi (2 – 8.6 bars)
  • Operating temperature: 350°-1000°F (20°- 380°C)
  • Flow controller to limit backwash flow

 

Available Options:

  • Auxiliary micro switch
  • Inlet / Outlet sample valves
  • Duplex systems
  • Vacuum breaker
  • Filters using diaphragm valves
  • Stainless steel tanks
  • Inlet / Outlet pressure gauges
  • Epoxy coated steel tanks