LR Series PVDF Flexible Flat-Sheet MBR and Immers | RFQ Sourcing Details

The LR Series is a family of flexible flat-sheet PVDF membrane stacks and assembled modules intended for membrane bioreactor (MBR) and immersed ultrafiltration installations.

The listed LR4, LR8, and LR9 stacks use 250 × 250 mm membrane sheets with a stated average thickness of 0.7 mm and pore-size range of 0.03–0.1 μm.

Applications identified for the range include domestic and municipal sewage, industrial wastewater, tertiary treatment, surface-water treatment, groundwater ultrafiltration, and upgrades to existing sedimentation or wastewater tanks.

Supported configuration details The LR4 stack contains 182 membranes and provides 20 m² of membrane area, with a listed flow range of 200–600 L/h. The LR8 contains 114 membranes and provides 12.5 m², with a flow range of 125–375 L/h. The LR9 contains 208 membranes and provides 23 m², with a flow range of 230–690 L/h.

All three use PVDF membranes and two discharge pipes. Listed stack dimensions are 528 × 520 × 252 mm for LR4 and LR8, and 528 × 920 × 252 mm for LR9. Membrane spacing is 4 mm for LR4 and 8 mm for LR8 and LR9.

The stack construction comprises rectangular membrane sheets, sealing rings, spacing strips, a central water-collection pipe, and end baffles. Filtrate passes into the support passage and is collected through the central pipe. Backwashing is listed as available.

Standard assembled LR8 and LR9 module configurations combine multiple stacks and cover stated total membrane areas from 25 to 1,104 m², depending on model. Operating information The stated pH range is 2–12. Stack working-pressure differential is listed as 0.2–6 m for LR4 and 0.2–4 m for LR8 and LR9.

A separate comparison table gives a flexible-flat-sheet operating flux of 10–30 LMH and a transmembrane pressure differential of 0.05–0.3 m. These figures should be treated as selection inputs rather than guaranteed project results. Published capacity tables are based on membrane area multiplied by flux.

The domestic-sewage calculation uses 400 L/day per square meter, 20 effective operating hours per day, and intermittent operation of either eight minutes on/two minutes off or nine minutes on/one minute off. Industrial wastewater flux is specifically identified as requiring project-specific calibration.

Buyer confirmation before ordering Confirm the exact stack or assembled-module model, required membrane area, design flux, wastewater characteristics, pretreatment, aeration demand, cleaning and backwash procedure, allowable pressure differential, and target effluent limits.

Also request confirmation of how the separa dimensions, lifting and access clearances, pipe connection sizes, module support method, water-collection layout, backwash arrangement, aeration connections, and compatibility with existing controls.

Effluent quality depends on influent composition, biological treatment performance, loading, operating cycle, cleaning, and system design.

The stated typical values and case results should therefore be validated against representative water analysis and project-specific pilot or engineering data before equipment selection.