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Medium-R series is standard double stage reverse osmosis system. With 2 stage pump, 2 stage RO membrane and buffer tank, system achieves stable water quality, little drain, and low running cost. Compared with single stage RO system, the quality of RO water is better, and the running cost is lower for less consumables replacement. Moreover, compared with simple 2nd stage RO system (1 pump, 2 RO membrane, without buffer tank), its system design is more rational, and the RO quality is more stable. Even though with the worse source water, the 2nd stage RO water’s conductivity also can stay 1-5µs/cm. Medium-RS series is 2nd stage RO & ultrapure water system, with LCD controlling system, 3 way water quality sensor, timing and quality dispensing, stainless steel shell, built-in 2 set tanks (buffer tank and pressure tank). Its output ranges from 30 to 90 liters/hour. The 2nd stage RO water’s conductivity can stay 1-5µs/cm, and the ultrapure water’s resistivity absolutely reaches to 18.2MΩ.cm. It completely meets the highest grade I standard of ASTM, CAP, CLSI, EP and USP.

Flow Schematic


Model Medium-RS30/45/60/90 Medium-RS30/45/60/90UF Medium-RS30/45/60/90UV Medium-RS30/45/60/90UVF
Output -1st stage RO water* 30 series: 63 liters/hour, 45 series: 93 liters/hour,
60 series: 125 liters/hour, 90 series: 150 liters/hour
Output -2nd stage RO water* 30 series: 30 liters/hour, 45 series: 45 liters/hour,
60 series: 60 liters/hour, 90 series: 90 liters/hour
Output -ultrapure water* 30 series:<30 liters/hour, 45 series:<45 liters/hour,
60 series:<60 liters/hour, 90 series: <90 liters/hour
Pure water outlet 3: 1st and 2nd stage reverse osmosis water, ultrapure water
Ultrapure water quality  
Resistivity(25°C) 18.2MΩ.cm
TOC* <10ppb <10ppb <3ppb <3ppb
Bacteria <0.01cfu/ml
Particle(>0.2µm) <1/ml
Endotoxin N/A <0.001Eu/ml N/A <0.001Eu/ml
RNases N/A <1pg/ml N/A <1pg/ml
DNases N/A <5pg/ml N/A <5pg/ml
RO water quality  
Conductivity - 1st stage RO water Feed water conductivity×5%*
Conductivity - 2nd stage RO water 1-5µs/cm*
Feed water requirements Tap water, temperature:5-45°C,pressure:1.0-4.0Kgf/cm2
Dimension and weight Length×Width×Height:640×540×1110mm / Weight: about 80Kg
Electrical requirements AC110-240V, 50/60Hz
Power 240W 240W 240W 360W
Standard configuration Main body (Including 1 set of cartridge)+built-in 15 liters pressure tank and buffer tank
*The value will be influenced by temperature and feed water’s quality.


Item no. Commodity Approximate replacement term /set
PC-20PP 20" spun fiber cartridge 2-6 months
PC-20AC-G 20" granular active carbon cartridge 2-6 months
PC-20AC-B 20" active carbon block cartridge 2-6 months
RO-150GPD 150 GPD reverse osmosis membrane 12-24 months
RO-200GPD 200 GPD reverse osmosis membrane 12-24 months
RO-300GPD 300 GPD reverse osmosis membrane 12-24 months
RO-400GPD 400 GPD reverse osmosis membrane 12-24 months
RO-600GPD 600 GPD reverse osmosis membrane 12-24 months
PTC-AC-HZB1 Reducing TOC cartridge 9000 liters pure water
PTC-MBR-12L 12l mixed bed resin cartridge 20000 liters pure water
PTC-UPPR-12L 12l ultrapure polishing resin cartridge 20000 liters pure water
PTC-MBR-25L 25l mixed bed resin cartridge 40000 liters pure water
PTC-UPPR-25L 25l ultrapure polishing resin cartridge 40000 liters pure water
PTC-UPPR-M Ultrapure polishing resin cartridge 1000 liters pure water/set
TF-0.2µm-B 0.2µm terminal filter -
UF-5000D MWCO5000D UF cartridge -
LAMP-(185nm&254nm)-10W-M Double wavelength(185&254)nm uv lamp 9000 hours

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