BALDR 4" Automatic Disc Filter Station – 120 Mesh, 475 GPM

BDA-303T4 – BALDR 4" Automatic Disc Filter Station, 120 Mesh, 475 GPM

The BDA-303T4 is a fully automated disc filter station with 3 x 3" T Filters on a 4" flange manifold, delivering up to 475 GPM of filtered irrigation water. The integrated backwash controller and control panel provide completely hands-off operation — the system monitors differential pressure across the disc elements and automatically triggers sequential backwash cycles to clean individual filter units without interrupting flow to the rest of the system.

Key Features & Benefits

• Fully automatic self-cleaning — built-in controller monitors pressure and triggers backwash automatically; no manual intervention required during irrigation
• Sequential backwash — cleans one filter unit at a time while the others continue filtering, maintaining continuous water supply to the irrigation system
• Factory assembled — arrives pre-assembled and ready for hook-up to your 4" flange manifold; minimizes on-site installation time
• 3 x 3" T Filters — 694 in² total filtration surface area for high throughput at low pressure drop
• 120 mesh disc filtration — polypropylene discs with diagonal cross-grooves provide in-depth filtration; replaceable with 80 mesh cartridges (BDA-30-CART80 (80 mesh) or BDA-30-CART120 (120 mesh)) for coarser filtration
• Vortex flow design — generates centrifugal spiral flow that pre-separates larger particles before they reach the disc elements, improving efficiency and reducing backwash frequency

How It Works

BALDR disc filters use stacked polypropylene discs that are diagonally grooved on both sides. When compressed, the opposing grooves create a matrix of crossing filtration passages that trap particles in depth — not just on the surface. During backwash, spring pressure releases, the discs separate, and reverse flow flushes captured debris out through the drain.

With the unique disc and vortex structure design, the filter will generate a centrifuge spiral flow of water, which moves away the solid particles in the water. The solid particles will be collected to the top of disc element with rotational flow. The vortex disc filter system ensure high efficient filtering and water-saving for the low frequency of backflushing.

How it Works

Filtration Stage
Under the command of the controller, the dirty water flows into to the filters in filtration stage via the backflushing control valves, then the Vortex and the disc keeps the particles in the grooves of the discs, then the clean water flows into the outlet.

Backwashing Stage
Under the command of the controller, only one of filter startss backflushing at a time. The backflushing control valves change the water flow direction, then the filtered water is introduced in reverse through the filtering element which decompresses the stack of discs for the backflushing procedure. The solids are expelled from the discs and discharged through the drainage manifold. The filtration process starts again after finishing the backflushing stage. The filter will start backflushing successively until all filters finish cleaning.

Features & Benefits:

• Made of polyamide which is resistant to chemical products and durable.
• Completely automated for unmanned performance.
• Automatic backflushing is triggered by pressure difference and by programmed schedule.
• Manifold made of stainless steel.
• Efficient water saving in auto backflushing with a minimum pressure of 21 PSI and flow rate of 16 GPM.

Material:

• Manifold: 304 Stainless Steel
• Housing: Reinforced Polypropylene
• Filtering Elements: PP Grooved Discs
• Clamp: 304 Stainless Steel
• Sealing Element: NBR

Head Loss

Dimensions - Inches