Our range of Water Treatment Plant Spares includes Water Treatment Membranes, U V Systems, High Pressure Pumps, Multiport Valves, FRP Vessels, Membrane Housings and Cartridge Filters. These are best in quality and are used in various water treatment products such as RO system, DM plant and water softeners. Our range is durable and manufactured using high grade raw material and latest technology to ensure optimum performance.
A thin sheet or surface film, either natural or man-made of microporous structure that performs as an effluent filter of particles down to the size range of chemical molecules and ions. Such membranes are termed "semipermeable" because some substances will pass through but others will not.
To help you understand membranes think of a small brook with flowing water - the water has small leaves and other debris in the water. There is a window screen in the brook. The screen represents the semi permeable membrane and the leaves and other debris in the water represent particles. In this case small leaves and debris can pass through the screen while larger leaves and debris cannot pass.
A semi permeable membrane is sometimes referred to as selectively permeable. This is because some substances can pass through rather quickly while others pass slower and some not at all.
Most cell membranes are semi permeable - meaning that some particles, water, and ions can cross. However, the cell membrane is made up of fatty acids and lipid layers which repel water. To assist you with this concept, think of a measuring cup in your kitchen that you pour ¾ cup of oil into the cup. Then you add ½ cup of water. What happens?
The water and oil do not mix together, do they? No. In fact, the water is on the bottom and the oil is on the top. This is an example of the repelling that occurs at the fatty lipid cell wall when particles dissolved in water approach.
So what happens to allow particles and ions to cross the cell membrane? The process used is calledfacilitated diffusion. Facilitated diffusion is the process of transporting particles into and out of a cell membrane. Energy is not required because the particles move along the concentration gradient. This requires the use of a carrier.
The carrier is usually a special protein that carries the particle, water, or ion through a cell wall channel. Concentration gradient is the process of particles, which are sometimes called solutes, moving through a solution or gas from an area of higher number of particles to an area of lower number of particles.
The most frequent example used to explain semi permeable membrane is osmosis. Osmosis is the movement of water across the semi permeable cell membrane. The cell membrane has phospholipid bilayers. These layers are made up of glycerol, two fatty acids, and a phosphate.
Tube settler systems are an inexpensive solution for drinking water and wastewater plants to increase treatment capacity, reduce new installation footprints, improve effluent water quality, and decrease operating costs. Constructed of lightweight PVC, tube settler modules can be easily supported with minimal structures that often incorporate effluent troughs and baffles. Modules are available in a variety of sizes to fit any tank geometry and tube lengths to accommodate a wide range of flows. With years of experience and extensive knowledge of the water treatment process, Shreyans Water Engineers can provide full process design for economically packaged systems.
Tube settler modules consist of a series of sloped, tubular channels and structural wave sheets that reduce particle settling distance and increase the effective settling area in a clarifier or sedimentation basin.
Shreyans Water Engineers offers custom-designed support systems for every installation that are engineered to accommodate various loading scenarios with an appropriate safety factor.
Cartridge filter - Bag filter:
A Bag-filter works by the principle of micro-filtration. The liquid is purified in bags by passing small permeable pores. Bag-filters can be used for large amounts of water.
The sizes of these pores are between the 1-200 micron
The capacity depends on the surface area from the bags. Bigger systems can clean up to more than 500 m3 /h (multi bag-filters)
There are special bags for various chemicals
The choice of cartridge filter depends on the application. Cartridges filters are preferable for systems with contaminations lower than 100 ppm that is to say with contamination levels lower than 0.01% in weight.
Cartridge filter can be surface or depth-type filter: depth-type filters capture particles and contaminant through the total thickness of the medium, while in surface filters (that are usually made of thin materials like papers, woven wire, cloths) particles are blocked on the surface of the filter.
Surface filters are best if you are filtering sediment of similar-sized particles. If all particles are i.e. five micron, a pleated 5-micron filter works best because it has more surface area than other filters. Compared with pleated surface filters, depth filters have a limited surface area, but they have the advantage of depth.
Pressure vessel features:
Pressure vessels can theoretically be almost any shape, but shapes made of sections of spheres, cylinders, and cones are usually employed. A common design is a cylinder with end caps called heads. Head shapes are frequently either hemispherical or dished (torispherical). More complicated shapes have historically been much harder to analyze for safe operation and are usually far more difficult to construct.
Many pressure vessels are made of steel. To manufacture a cylindrical or spherical pressure vessel, rolled and possibly forged parts would have to be welded together. Some mechanical properties of steel achieved by rolling or forging, could be adversely affected by welding, unless special precautions are taken. In addition to adequate mechanical strength, current standards dictate the use of steel with a high impact resistance, especially for vessels used in low temperatures. In applications where carbon steel would suffer corrosion, special corrosion resistant material should also be used.
Some pressure vessels are made of composite materials, such as filament wound composite using carbon fiber held in place with a polymer. Due to the very high tensile strength of carbon fiber these vessels can be very light, but are much more difficult to manufacture. The composite material may be wound around a metal liner, forming a composite over wrapped pressure vessel.