FFM-FR Series: Fouling Resistant Reverse Osmosis Membrane

FFM’s high-rejection RO membrane series is engineered specifically for brackish and saline water desalination, offering low operating pressure, exceptional salt rejection (>99.6%), strong fouling resistance, and stable performance.

Ideal for waters with salinity below 5,000 ppm—including well and surface water—these membranes serve drinking water systems, ionexchange pre-treatment, and industrial applications such as power plant boiler feedwater, high-salinity wastewater treatment, and beverage production.

Model	Effective Membrane Area ft² (m²)	Test Pressure psi (bar)	Permeate Flow gpd (l/h)	Stable Salt Rejection %
FFM2521HR	14 (1.3)	225	250 (1.32)	99.6
FFM2540HR	30 (2.8)	225	750 (2.8)	99.6
FFM4021HR	36 (3.4)	225	950 (3.6)	99.6
FFM4040HR	85 (7.9)	225	2200 (8.3)	99.6
FFM8040HR-375	375 (34.9)	225	10000 (37.8)	99.6
FFM8040HR-400	400 (37.2)	225	10500 (39.7)	99.6
FFM8040HR-440	440 (41)	225	12500 (47.3)	99.6

1. Test conditions: 500 mg/L (NaCl) aqueous solution; water temperature 25℃; recovery rate 50%;

2. The permeate flow rate of a single membrane element may vary within +/- 15%.

3. Membrane element performance parameters may change after product updates.

Operating and design parameters (operating limits):

Maximum Operating Temperature	113°F (45°C)
Maximum Operating Pressure	600 psi (4.1 MPa)
Maximum Pressure Drop Per Element	15 psi (0.1 MPa)
Maximum Pressure Drop Per Vessel	50 psi (0.35 MPa)
pH Range, Continuous Operation	2–11
pH Range, Short Term Cleaning (30 min)	1–13
Maximum Feed Water SDI (15 mins)	5
Maximum Chlorine Concentration	< 0.1 mg/L