One Stage Reverse Osmosis Sand Filter Carbon Filter Precision Filter with Water tank All Stainless Steel Purified Water Machine

Product description

This equipment is an integrated purified water preparation system made entirely of stainless steel material. Through the core process of “pretreatment+first stage reverse osmosis”, combined with the corrosion resistance and hygiene characteristics of all stainless steel material, it treats raw water (tap water, groundwater, etc.) into purified water that meets industry standards such as food, medicine, electronics, etc. It has the characteristics of stable water quality, strong durability, and high degree of automation. The following provides a detailed explanation of the system composition, working principle, core advantages, and application scenarios:
1、 Core components and functions of the system (made entirely of stainless steel material)
1. Sand Filter
Construction: The main body is a 304 stainless steel tank (thickness ≥ 3mm, pressure resistance ≥ 0.6MPa), equipped with gradient quartz sand filter material (upper layer 0.8-1.2mm coarse sand, lower layer 0.5-0.8mm fine sand), and equipped with a stainless steel automatic control valve group (controlling filtration and backwashing).
Core functions:
Physical interception: Removing suspended impurities such as sediment, rust, algae, colloids, etc. from raw water, reducing turbidity from 10-30NTU to ≤ 1NTU;
Protect subsequent equipment: avoid scratching core components such as activated carbon and reverse osmosis membranes with large particle impurities, and extend their service life;
Automatic backwashing: When the inlet and outlet water pressure difference is greater than 0.05MPa or timed (8-12 hours), automatic backwashing (water flushing) is started to restore the filtering ability of the filter material, without manual operation.
2. Carbon Filter
Construction: 304 stainless steel tank body (same specifications as sand filter), filled with high iodine value coconut shell particle activated carbon (specific surface area ≥ 1000m ²/g, iodine adsorption value ≥ 1000mg/g), and operated in conjunction with the sand filter.
Core functions:
Adsorption purification: Efficiently adsorbs residual chlorine (removal rate>99%), organic matter (such as pesticides, humic acid), odors, and pigments in water, avoiding residual chlorine oxidation and damage to reverse osmosis membranes (polyamide membranes are sensitive to chlorine);
Improving water quality and taste: removing odor causing substances to provide higher quality influent for subsequent purification treatment;
Assisted decolorization: Reduce natural pigments in water (such as yellow caused by iron and manganese) and improve the clarity of the produced water.
3. Precision Filter
Construction: 304 stainless steel shell (quick opening top cover, easy to replace filter element), built-in 5 μ m PP folding filter element (3-5 pieces, configured according to flow rate), equipped with stainless steel pressure gauge (monitoring inlet and outlet pressure difference).
Core functions:
Retain fine particles (such as activated carbon powder and colloidal fragments) remaining after pre-treatment, ensuring that the pollution index (SDI) entering the reverse osmosis membrane is ≤ 5;
As the “security filter” of the reverse osmosis system, it absolutely protects the membrane components from damage and is the “last line of defense” of the reverse osmosis membrane.

4. One Stage Reverse Osmosis system
Core components:
High pressure pump: made of 316L stainless steel material (resistant to slight corrosion), designed as a multi-stage centrifugal pump, providing a stable pressure of 1.0-1.5MPa, equipped with a variable frequency controller (adjusting the speed according to the water production demand, saving more than 30% energy);
Reverse osmosis membrane module: stainless steel membrane shell (pressure resistance ≥ 2.0MPa), equipped with a rolled composite reverse osmosis membrane (such as Dow BW30-400, Heiden ESPA2, desalination rate ≥ 99.5%);
Fully automatic valve group: stainless steel solenoid valve/ball valve, controls the discharge and flushing process of produced water and concentrated water, and the system recovery rate is stable at 60% -75%;
Online monitoring instruments: stainless steel conductivity meter (real-time monitoring of water purity, automatic discharge if exceeding standards), pressure transmitter (monitoring the pressure before and after the membrane to determine membrane fouling status).
Core functions:
Deep desalination: Through the selective permeability of reverse osmosis membranes, more than 99% of soluble salts (such as calcium and magnesium ions), heavy metals (such as lead and arsenic), bacteria, viruses, etc. are intercepted, and the conductivity of the produced water is ≤ 50 μ S/cm;
Fully automatic operation: automatic low-pressure flushing of the membrane surface (1-2 minutes to remove residual impurities) upon startup, automatic start stop based on the water tank level, and automatic alarm shutdown in case of faults (such as high-pressure overload or water shortage).
5. Purified water tank
Construction: Made of 304 stainless steel material (mirror polished inner wall, Ra ≤ 0.8 μ m, to prevent microbial adhesion), with a capacity of 1-2 hours of water production for the system, equipped with:
Stainless steel liquid level sensor (linked reverse osmosis system start stop: low liquid level start, high liquid level stop);
Stainless steel breathing filter (0.22 μ m sterilization grade, preventing contamination from microorganisms and dust in the air);
Stainless steel mixer (optional to prevent water stratification).
Core functions:
Store reverse osmosis produced water, balance the flow fluctuations of terminal water, and ensure continuous water supply;
All stainless steel material avoids secondary pollution of water quality and meets the hygiene requirements of the food and pharmaceutical industries.
6. Material characteristics of the entire system
Water contact components: all made of 304 or 316L stainless steel (sand filter/carbon filter tank, pipeline, valve, water tank, etc.), without plastic or carbon steel contact, resistant to rust, free of dissolved substances, ensuring pure water quality;
Frame and shell: Stainless steel square tube welded, surface brushed treatment, corrosion-resistant and beautiful, suitable for humid or clean environments (such as pharmaceutical workshops, food factories).

2、 System workflow
Preprocessing stage:
The raw water first enters the sand filter, where quartz sand intercepts large suspended impurities and reduces turbidity; The effluent enters the carbon filter, where activated carbon adsorbs residual chlorine, organic matter, and odors, completing the initial purification of water quality.
Precision filtration stage:
The pre treated water enters a precision filter, with a 5 μ m filter element intercepting fine particles to ensure that the water entering the reverse osmosis membrane is free of damaging impurities.
Reverse osmosis desalination stage:
The high-pressure pump pressurizes the water to 1.0-1.5MPa and sends it into the first stage reverse osmosis membrane module. Water molecules pass through the membrane to form purified water (conductivity ≤ 50 μ S/cm), and salt and impurities are discharged with the concentrated water; The system monitors the quality of the produced water in real-time to ensure compliance with standards.
Storage and water supply stage:
The reverse osmosis produced water enters the all stainless steel purified water tank for storage, and the reverse osmosis system is started and stopped through a liquid level sensor linkage; When using water at the terminal, it is transported to the point of use through stainless steel pipes to ensure that the water quality is free from secondary pollution.
3、 Core advantages and application scenarios
Core advantages
All stainless steel material: The parts that come into contact with water are made of stainless steel, which is corrosion-resistant, easy to clean, and free of dissolved substance pollution. It meets food grade and pharmaceutical grade hygiene standards and has a service life 3-5 years longer than ordinary carbon steel/plastic equipment;
Efficient purification: The first stage reverse osmosis desalination rate is ≥ 99.5%, and the conductivity of the produced water is ≤ 50 μ S/cm, meeting the purified water needs of multiple industries;
Automated operation: From pre-treatment backwash to reverse osmosis start stop, the entire process is automatically controlled, reducing the difficulty of manual operation and suitable for unmanned scenarios;
Strong adaptability: It can handle various types of raw water such as tap water and groundwater, especially suitable for scenarios with complex water quality or strict requirements for equipment materials.
Typical application scenarios
Food and beverage industry: bottled water production, juice blending, beer brewing (water production complies with GB 19298-2014 “Packaged Drinking Water” standard);
Pharmaceutical industry: cleaning water for formulation workshops and laboratory preparation water (meeting the basic indicators of purified water);
Electronics industry: electronic component cleaning, PCB board rinsing (removing salt from water to avoid short circuits or oxidation);
High end commercial venues: direct drinking water systems in hotels and hospitals (made entirely of stainless steel to improve hygiene and ensure safe drinking water).
Technical parameter reference (taking equipment with a daily output of 100 tons as an example)
Project parameters
Water production capacity 4-5m ³/h
Inlet requirements: Municipal tap water or well water (turbidity ≤ 30NTU)
Water production conductivity ≤ 50 μ S/cm
Desalination rate ≥ 99.5%
Material: 304 stainless steel (water contact part), 316L stainless steel (high-pressure pump)
Power 5-7kW
Covering an area of 3-5 square meters
This equipment, with its durability and hygiene of all stainless steel material, combined with the efficient purification capability of first level reverse osmosis, has become an ideal choice for scenarios with dual requirements for water quality and equipment material. It can ensure the purity of the produced water, adapt to complex environments, and reduce maintenance costs.