Yardney Sand Media Filters are designed as a solution for the most challenging dirty water conditions in irrigation systems. Yardney pioneered the use of sand media filtration in 1965 and through advancing technology, continues to provide high performance and long term value in the field. Yardney Sand Media filters are manufactured in the USA to the most exacting standards.
Offered in multiple configurations and available in standard design and pressures or one of the many alternative designs in both Carbon Steel or Stainless steel which include High Pressure, Interior Epoxy coating, removable under drains, etc.
Carbon Steel Sand Media Automatic or Semi Automatic
Applications:
- Removal of algae, slime or other organic contaminant as well as sand, rock, grit and other inorganic contaminants
- Protects drip and micro-irrigation systems from plugging with fine filtration removal down to 200 mesh or 75 microns
Advantages:
- ASME code shaped head construction for durability and safety
- Standard carbon steel products use 3/16″ thick material
- Standard stainless steel products use 10 gauge thick material
- Standard operating pressure of 100 psi (high pressure systems available)
- Backwash automatically initiated by elapsed time or pressure differential
- Easy-entry lid closure with weld tabs for operator safety
- Stainless steel wedgewire underdrain
- Ensures structural integrity in the harshest conditions
- Hydraulically balanced to increase effectiveness of backwash while reducing flush frequency and waste of water
- High strength stainless steel wedgewire will withstand a collapse pressure in excess of 600 psi
- Exterior of tank on carbon steel product is powder coated with UV stabilized polyester powder coat for longer product life and greater protection from the environment
- Standard 6″ drain port included on all 36″ and 48″ tanks ensuring less labor for dumping of media and access to the stainless steel underdrain
- Standard 3″ drain port included on 14″, 18″, 24″ and 30″ tanks
- Made in USA
Stainless Steel Sand Media Automatic or Semi Automatic
Standard product includes:
- Easy-entry lid closure
- Backwash Valves
- Inlet and outlet manifolds
- Grooved couplings to connect system hardware
- Grooved PVC adapters for backwash manifold
- Mainline couplings with PVC adapters
- Automation package (If applicable)
- Sacrificial anode on stainless steel product
Available Options:
- ASME code
- High pressure
- Solar package
- Custom filter station
layout piping
The automatically controlled system will operate on line for extended periods of time prior to the short backwashing cycle. Automatic filter operation is monitored on both elapsed time as well as pressure differential. When the controller “calls” for a backwash as a result of pressure differential or elapsed time, the backwashing function utilizes a portion of the clean filtered water produced by the system to clean the media. The backwash flow is segregated for proper disposal in a separate discharge line. Note that single tank systems utilize unfiltered water for backwashing. Optional external backwash water sourcing systems are available for both single and multiple tank systems.
Filtration Process
- The contaminated water enters the tank through the inlet manifold, transitioning to the Yardney 3-way valve and into the top inlet of each tank.
- The Yardney two-stage deflector creates a uniform distribution for laminar flow across the media bed while avoiding channeling of the media bed.
- Particulate is trapped and retained within the media bed resulting in clean process water flowing out through the stainless steel wedgewire underdrain, to the outlet of each filter tank and to the outlet manifold for end use.
Superior filter performance is achieved by the added features of a larger inlet, two-stage deflector, 14″ media bed depth, gravel pack and a hydraulically balanced underdrain to produce a low pressure drop which will produce longer run times between backwashes.
Backwash Process
- Backwash sequence is initiated by either elapsed time of the Yardney controller or pressure differential between the inlet and outlet manifolds.
- Water or air pressure opens the Yardney 3-way valve causing the reverse flow of a portion of filtered water up through the stainless steel underdrain to hydraulically and uniformly lift the media bed.
- The use of a hydraulically balanced underdrain in conjunction with a gravel pack creates a proper and uniform lift of the media bed while avoiding a turbulent backwash.
- Particulate is released during the backwash event, exhausted through the backwash manifold and routed to a convenient location.
- One tank at a time is backwashed while continuing to process water for use until the entire system is clean.
- Once completed with the backwash, filtration continues until the next backwash event is called for.
Superior backwash performance is achieved by the use of a hydraulically balanced under-drain and gravel which produces the proper lift and fluidization of the sand media bed to ensure complete release of entrapped particles which will produce a low pressure drop and longer run-times between backwashes.
