Industrial Screens

The GUJARAT WEDGE WIRE SCREENS LIMITED intake screen removes rubbish, stones, leaves and aquatic life forms from the flow prior to entering the supply pipe (penstock). This is often a requirement of environmental protection agencies. A poor intake is normally the cause of most hydro turbine system problems. Poor intakes may allow small stones to enter the penstock that can cause serious damage to the Pelton rotor or cause the jets to suddenly block resulting in severe water hammer that can rupture pipe and fittings.

Our GWWSL intake screen is not limited to small hydro schemes; it can also be used for domestic, farm, village and small town water supplies.

Our GWWSL intake screens are designed to provide low maintenance screening solutions for water intakes without the need for any moving parts. The self-cleaning ability and high abstraction flow capacity is due to the shape of the screen and the arrangement of the wedge wires that make up the screen.

The GWWSL screen uses the Coanda effect, which is the phenomena in which a jet flow attaches itself to a solid surface and remains attached, even when the surface curves away from the initial jet direction. The screen is built from wedge-shaped wires that have suitably angled faces to which the flow attaches.

Water is directed over the screen in a fast moving sheet, and the bars deflect it into a tank below whilst debris continues straight on and is washed off by the surplus flow.

Water and some fine silt particles (<1.5mm) pass through the screen, whilst larger silt and debris is excluded and deposited downstream. During times of low river flow the screen capacity may be greater than the available water. Under these conditions debris can build up on the lower parts of the screen. This will be washed off the next time the river flow rises above the screen capacity.

You can order your intake so that the pipe can attach on the left hand side (LHS), right hand side (RHS) or in the central location as shown below. The central option is possible but not advised, unless there is no space for a LHS or RHS fitting.

If possible you should avoid a sharp elbow connection to the intake casing. Once the pipe is connected to the intake it can be concreted over to help protect from floods. It is very unlikely you will ever need to separate the intake tank from the pipe again.

Each complete intake comes with:

• Black roto-molded LDPE casing
• Coanda screen
• Outlet pipe fitting based on your selected size option
• Acceleration plate and securing tube
• Low entry-loss (bell-mouthed) internal fitting
• Vortex breaker plate (only on 1/2 screen version)
• Securing anchors so it can be concreted into position

Screen Specifications:

• Material: 304 stainless steel
• Screen gap: 1.5mm
• Wedge wire tilt angle: 5 degrees 10 degrees 12 degrees
• Wedge wire width: 2.3 mm , 3 mm
• Wedge wire depth: 3mm , 5mm
• Supporting bar: 3mm wide x 5mm deep at 24 mm spacing
• Width x length: 380 mm x 188 mm
• Effective width x length installed: 360 mm x 168 mm
• Screen angle relative to flow rate: 0 to 40 degrees (we recommend 25-35 degrees)
• Approved nominal flow: 8l/s
• Rated load: A person of 100kg can stand on the screen without damage.

Coanda Intake Screen, also called Coanda Hydro Screen, provide self-cleaning with the special geometry based on the Coanda Effect phenomenon. The Coanda screen is capable to enable liquid-solid separation with high filtration performance. The hydro screen prevents the sediment, sticks, rock, and dirt with the small-sized openings with no-moving parts and no power requirement.

How Does It Technically Work?
The curved screen of the Coanda Screen consists of V-shaped wedge wires that are placed in exact locations that will create a Coanda effect for the filtration. These wedge wires have a specific gap and tilt angle relative to each other.

Water flows through this gap between the V-shaped wedge wires by preventing other particles. Thus, this gap and the tilt angle defines both capacity and filtration performance. Also, the curved shape of the Coanda screen helps the filtration process complete accurately by the exerted forces of flow. Unwanted particles such as sediment, rock and stick follow the curved shape with this exerted force. As a consequence, it provides self-cleaning.

In the design of the Coanda Screen, important parameters such as tilt angle, open gap, acceleration plate and curved screen must be taken into account. Because more gaps and high tilt angle cause poor filtration performance but high capacity. Thus, an undesirable situation occurs with ineffective filtration performance.

To avoid this poor filtration performance, important parameters such as gap, tilt angle and curve of the Coanda Screen must be calculated, designed and manufactured accurately for the best utilization of the Coanda Intake Screen. ADENCO is capable to provide accurate and customized design and manufacturing for your applications and requirements with our Coanda Screen Engineers.

Advantages

• Coanda Hydro Screen is an effective solution to get clean water for a wide range of applications. In terms of filtration and usage Water Screen provides significant advantages listed below:
• No-power requirement
• Effective cleaning with outstanding capacity
• Long service life with negligible operational cost
• Self-Cleaning

Advantages

• Customized Coanda Screen design
• Project specific consultancy, retrofitting and troubleshooting
• Integration of Coanda Screen for heavy conditions
• Special surface treatment depending on application
• Protection for Aquatic creatures

Applications
With the high filtration performance and easy usage, Coanda Intake Screen provides clean water for a wide range of application where fluid-solid separation or clean water is required.

The most popular and effective usage of the Coanda Screen is an application in hydroelectric plants. Coanda Water Intake supplies clean water for the hydroelectric plants by preventing harmful materials and protecting turbine blades.

• Hydroelectric Plants
• Drinking Water
• Agricultural Applications
• Snowmaking Machines
• Sewage Treatment
• Dewatering

Very high efficiency Baskets are made from Looped Wedge Wires in Conical shape, cylindrical shape and in double Cylindrical shape i.e. Pusher type centrifuge. The wedge wire baskets have clear advantage of very high filtration efficiency, longer life and accurate aperture over any other Conventional screen baskets. Conical and Cylindrical baskets can be tailor made to suit the customer requirement and maximum efficiency.

Wedge wire tubes are made during simultaneous winding of specially profiled working wires on a spiral and welding them to carrying wires placed along the tube. This technology allows the production of wedge wire screens when very high gap precision and screen resistance are required. Due to using the newest welding technology we can obtain various distances between carrying wires, very accurate and repeatable gap and therefore produce screens according to customers particular requirements.

Flat Panels are the most widely used type of Wedge Wire Screens mainly in the mineral processing both for stationery as well as vibratory decks. Flat panels manufactured by GUJARAT WEDGE WIRE SCREENS LIMITED are most dependable for effective sizing or classifying as they have accurate bar spacing from as low as 0. 01 mm to 4.5mm at interval of 0. 01 mm. Because of Looped construction they probably have the highest strength for any particular size and are self supporting and do not require support for long distances. The panels are either continuously or intermittently welded on the lower side of loop to provide complete rigidity to the panels thus becoming very effective in transmitting the vibrations without mechanical failures. The panels can be made with any type of fitment as per the requirement of the customers and for particular machines i.e. the side bar can be of Mild Steel or Stainless Steel square bar or of good quality, hook strips etc.

Key features :

• High capacity
• Non-clogging
• Permanent screen media
• No moving parts
• Little space needed
• Low equipment and installation costs
• Low maintenance costs
• Insensitive to changes in consistency or freeness
• Operating flexibility due to adjustable slice

Thickening and screening for many types of products

Our DSM Screens are low maintenance, gravity-fed and suitable for mineral processing, chemical, food, pulp and paper.

WHAT WE OFFER
Reliable screening for all your use cases

Designed with your operation in mind, Our DSM Screens are a curved concave wedge bar type of stationary screen made to be rugged, compact, efficient and easy to operate.

With no moving parts, these screens require minimal maintenance. Our full line of gravity-fed DSM Screens are available in the following types: 45°, 60°, 120°, 270°, 300°, and rapifine. They are often used in the following industries: mineral processing, chemical, food and pulp and paper.

Each of these screen sizes has been tailored for a variety of process applications. For example, the 45° DSM Screen is best suited for thickening and screening, whereas the 120° type DSM Screen is capable of thickening pulp, recovering fibre, or separating fibre as small as 100 microns in length from a water suspension. It is very compact and requires minimal maintenance.

The DSM's unique screen plate is made of wedge bars forming a bowed surface with horizontal slots between the bars. Normal slot width is 100 or 150 microns.

The flow to be screened is fed through a low-pressure nozzle which distributes the flow tangentially over the full screen width by means of an adjustable slice that optimises feed velocity. As the suspension flows along the screen plate, thin layers of water are "sliced off" by the screen bars and pass through the slots together with fine particles.

KEY BENEFITS
Goodbye high-maintenance: a DSM Screen made to save space and money

Designed with you in mind, our DSM Screens are meant to be not only compact, rugged, and durable, but also extremely efficient and easy to use. Additionally, they are low cost and low maintenance. Because our DSM Screens have no moving parts, they require very little maintenance. This also makes them lower in cost.

Since our DSM Screens are compact, they'll leave ample space for other parts and machines. Their relatively low cost means you'll have more funds to spend on the bigger-picture elements of your operation.

PRODUCT FEATURES
DSM Screens: your permanent, low-maintenance screening solution In your search for the most reliable and highest quality DSM Screens, there are a number of features that are high on your priority list.

You want a supplier that offers screens in many types so that you can find the right fit for your machine and use case. You demand a solution that is low maintenance and compact. These are just some of the features that come standard with our DSM Screens. Here is a larger list of all the features of our DSM Screens:

• High capacity
• Non-clogging
• Permanent screen media
• No moving parts
• Little space needed
• Low equipment and installation costs
• Low maintenance costs
• Insensitive to changes in consistency or freeness
• Operating flexibility due to adjustable slice

Rotary Drum Screens - Effective in High Pressure Working Conditions

• Rotary drum wire screen, also called wedge wire cylinder, is a type of cylindrical "V" shape wedge wire screen, which is made of stainless steel V shaped wires and support rods. As the wedge wire rotary drum screen is working under high pressure when separation and filtration, so there is reinforced rods on the structure.
• The end of rotary drum wire screen is welded flanges or welded rings for easy installation.
• The slot sizes and structures may varies according to different materials and working conditions.

Working principle
The drum rotary screen is installed on the roller screen machine. Drive the internal blades by motor to compress the filtration subjects and separate the particles and liquid with rotary drum wire screen (wedge wire screen). Click for detailed working principle of rotary drum screen in water treatment.

Advantages

• Continuous slot openings significantly increase the open area and filtration efficiency.
• V-shaped wire structures reduces clogging and ensures an uninterrupted flowing and working.
• Supply back washing performance for high working efficiency.
• Reinforced rods can bear high pressure during high speed rotary working condition.
• Stainless steel material reduces corrosion and rust and make it durable and reliable.
• Flange or metal ring ends make them easy to install onto the
• It is features smooth surface and high filtering efficiency as well as self-cleaning and clogging resistance.

Applications

• Poultry, meat and seafood processing
• Fruit and vegetables processing
• Snack and frozen food processing
• Brewing and wine making processing
• Chemical processing
• Municipal waste water treatment plant
• Industrial waste water treatment plant
• Tanning industrial processing

GUJARAT WEDGE WIRE SCREENS LIMITED has developed Rotary screens complete with side flanges and support/ drive drums of Stainless Steel/ Mild Steel mainly for Sugar and other Chemical plants to achieve very efficient filtration. Our rotary screens have very .high strength coupled with very high open area and rigid construction.

Rotary Wedge Wire Screens remove solids and other debris from wastewater flows to protect downstream equipment such as pumps and irrigation nozzles. The screens are suitable for all types of wastewater. The solid screenings are discharged by gravity. Screens are operating at Chemicals plant, Papers & Pulps, dairy farms and at food processors. They are designed to reduce blockages, maintenance and power consumption.

Rotary Wedge Wire Screen operation: The wastewater enters a weir and is evenly distributed onto the sidewalls of the drum. The solids are retained on the screen surface and the liquid flows through the screen openings. The solids are transported by flights to the open end of the drum. The rotation of the drum allows the entire screening surface to be continuously washed by the wastewater. Cleaning is also done by intermittent use of external spray nozzles.

Rotary Wedge Wire Screens feature: - In-feed flow distribution weir - Screen element of 304 stainless steel construction with screen size to suit flow and chosen screen aperture.

GUJARAT WEDGE WIRE SCREENS has developed run down screens (D.S.M. type) complete with box and curved wedge wire screens to suit particular requirements of the customer in Sugar, Paper and Pulp, Water treatment and Chemical industry

A no-moving part unit that cascades solid laden slurry downs a wedge wire screen to separate solids from liquids. The slurry is pumped or gravity fed into the unit’s top chamber, flows over a full width weir and cascades down the curved screens surface. The liquid passes through the screens voids into a collection chamber below. Solid particles larger than the screens void size stay on the surface, and as this accumulating mass increases in weight/volume, gently slides down the screens surface, compacted and further dewatered as it travels down. At the bottom discharge chute, the solids simply drop off or in some applications, go for further dewatering by a drum or screw press unit. The static screen version has it screen rigidly fixed in position whereas the other, more efficient unit, has its screen mounted to enable a small motor to vibrate it.

Structures of Sieve Bend Screen
Wedge wire sieve bends are made of stainless steel wedge wires. They are consist of a concave curved profile wire screen, which are inserted into a stainless steel frame. The wedge wire sieve bends are manufactured by wrapping and welding stainless steel V-shaped profile wire and support rods. Then the panel screens are cutting and curved into arc screen. The wedge wire sieve bends have continuous slots, which has efficient filtering performance. Forces exerted as materials flows against the curved surface, curved screen structure has better filtering and greater capacity than the wedge wire screen panel.

Working Principle of Sieve Bend Screen
DSM screen (sieve bend screen) is ideal for sizing and dewatering applications to remove solids from liquids or in solid/solid separation for dry feed situations. When the filtering materials flows against the sieve screens, Sieve bend screens can be manufactured into a variety of width, arc length and aperture to suit the flow rate and material sizing being separated. The feed materials are directed vertically and tangentially over the full width of the upper screen surface, then the material flows down the concave surface at right angles to the opening between wedge profiled wires. Wedge wire sieve bend screen has continuous slots, which supplies large open area and efficient filtering performance. Curved surface structure supplies higher flow rate, greater capacity and better filtering than wedge wire screen flat panels.

As a result, Thinner materials on the underside is deflected and passed out between the wires.

Features

• High filtering, sizing, dewatering performance.
• Good mechanical properties.
• Great capacity than the traditional vibrating screens.
• Corrosion and rust resistance.
• High temperature resistance.
• Low maintenance. It is easy to clean and need less maintenance.
• Non-clogging.
• Long and durable service life.
• Easy to install and replace.

Applications
The wedge wire sieve bends are mainly used for dewatering, sizing and waste water cleanup applications. They can be used in various fields, such as:

• Sewage treatment.
• Laundry wash water cleanup.
• Poultry, fish, fruit and vegetable waste water processing.
• Minerals processing.
• Paper production.
• Textile plants.

Water Intake Screen Help Nuclear Power Plants Filter Clean Waters
Intake Screens - T intake screens, half intake screens and drum intake screens

• Intake screens, also called passive intake screens and wedge wire intake screens, are constructed of non-plugging V-shaped wires with continuous and smooth slots. Point welded onto the wedge wire support rod, intake screen supply large open area and low velocity flow through the entire screen surface.
• This reduces impingement and entertainment of debris while protecting aquatic life. The slot width ranges from 1 mm to 10 mm (0.04" to 0.4") and 3 mm (0.12") is the most common.
• Intake screens are regarded as the first safeguard of intake system to keep fish safe and protect pumps and turbines from harmful debris. They are both efficient and environmentally safe.

Features

• It is an passive device, which have no moving parts to allow for efficient and effective fabrication with little to no maintenance.
• Continuous slots and large open area is minimum clogging and maximum water flow.
• Multiple designs and configurations accommodate deep to shallow depths.
• Stainless steel material is corrosion resistance and durable life.
• It can protect aquatic life as well as protect pump and equipment safe from harmful debris.

Applications
Intake screens provide continuous water extraction from rivers, lakes, dams and oceans.

They are widely used in the following industries:

• Municipal water supply
• Water treatment plants
• LNG plants
• Desalination
• Paper & pulp
• Sugar mills
• Nuclear power plants

One of the main steps in the brewing process is lautering. In a word, its main job is to facilitate the filtration of crushed grains from the fermentation broth. This process is performed in a vessel called a lauter tun where false bottom is an integral part of the vessel. There are many different types of false bottoms for lautering. Finding the right equipment for the job is crucial important. Wedge wire screen is one of the main options for false bottom available on the market.

The main job of the false bottom is to support the mash bed and confine the grains above the floor, while allowing liquid wort from the spent wort to flow through it. There are false bottoms manufactured by different methods, such as perforated or slotted sheet metal. However, some inherent problems still exist in these false bottoms:

• The false bottom is clogged, reducing the flow rate;
• Low filtration efficiency prevents grains from passing the false bottom into the wort, clogging the pump for recycling or transferring the wort to the next process;
• The false bottom is bent or moved out of position, resulting in the mash pass through with the wort together.
• Wedge wire screen panel false bottom is manufactured in a unique way. The wires are V-shaped with the wider end at the top, providing excellent support for the mash bed. As the wires with narrow end at the bottom, the space between wires becomes wider, providing a greater open area and allowing more worth to pass through. In the wedge screen manufacturing process, parallel support rods are welded to the wires. This leaves only two contact points on the wedge wire, which reduces clogging. In addition, the smooth surface of the wedge wire makes cleaning easier

There are various benefits of using a false bottom made of wedge wire screen. These benefits provide an excellent alternative to solve the known problems inherently exist in other materials:

• Large opening area with precise slot size, providing a high wort flow rate;
• Higher mechanical strength to better support the grain;
• Better efficiency to prevent grains from trapping or clogging holes;
• Improved lautering speed.

When you require the most effective method to remove solids, trust our ClearBlu wedge wire waterfall systems. View five reasons our products are the best.

GWWSL manufacturers wedge wire waterfall screens as a highly efficient and cost-effective alternative to other solids removal systems. A number of factors make these wedge wire screens an excellent choice.

Wedge wire screen

• The wedge wire screens have a very steep angle. This allows water flow to push screened material off into a dewatering hopper.
• .5 mm screens will actually separate material as small as .25 mm.
• Automatic spray bars keep dried material from clogging the wedge wire screens. Because they are timer activated, they use 90% less water than rotary screens.
• Stainless steel construction means acidic wastewater is no challenge.
• Screening solids before pH balancing can reduce chemical consumption by 60%. Solids can soak up significant amounts of the chemical.

Models
0-150 GPM Wedge Wire Screen
This wedge wire screen is designed for flows from 0 to 100 GPM for hydro screens. GWWSL screens are unique in that they have a 60-degree slope and are self-cleaning in most applications. They have no moving parts. The concept is simple: run the wastewater over a weir and down over a wedge wire screen. The solids are pushed off the screen and the liquids pass through the wedge wire.

Wedge wire screen
There are several important factors in selecting a good waterfall filter. First, the spacing between the wedge wire bars can vary. Second, the top of the wedge wire is flat (wedge wire is made of flattened tubing) and the tops should be canted slightly so that they trap the water. Third, there needs to be sufficient runway at the top so that the water can gain velocity. This is accomplished by placing a smooth section of stainless just below the weir at the top. Fourth, the slope of the wedge wire needs to be steep. This is counterintuitive. It would seem that you would want a low slope to slow the water. Instead, you want a steep slope so that you don't build up solids on the wedge wire screen. Water is heavy and will pass through a steep screen. Manufacturer: MiTM

Waterfall screen
150 to 250 GPM Wedge Wire Screen
The Model 2 waterfall screen has six square feet of wedge wire screen surface and is half the size of the Model 3. This wedge wire screen effectively removes solid particles from a waste stream. Like the other types, this model uses very little energy and requires only a minimum amount of maintenance. It's ideal for many different applications including agriculture and manufacturing.

400 GPM Wedge Wire Screen
This unit will handle flows up to 400 gallons per minute. It has a 1 MM wedge wire screen. The key to hydro screens is having the correct angle on the screen and having enough runway for the water so that it gains sufficient velocity over the wedge wire screen. This seems counterintuitive. Most manufacturers lower the slope and try to slow the water. This creates clogging and water bypass.

Our unit has a 60-degree slope. The screen is 48" wide and 36" long. The unit is stainless steel.

Wedgewire Waterfall Screens
Waterfall screens are ideal for effectively removing fibrous and solid particles from a waste stream. An automatic self-cleaning spray bar runs on a timer to continually keep the screen free from debris buildup. These screens use very little energy and require very little maintenance.

Applications:

• Wineries
• Breweries
• Food Processors
• Agricultural
• Industrial (garbage companies,municipal yards, etc)

Wedgewire waterfall screens are available in three sizes:

• Number One, 0-65 GPM
• Number Two, 65-150 GPM
• Number Three, 150-300 GPM.

Standard wedge wire is available in 0.5 mm and 1 mm spacing, but custom spacing is available. All models are available with stands in carbon or stainless steel. For solids handling, self-dumping dewatering hoppers from ¼ yard to 5 yards in size are available. Dewatering screens are stainless steel mesh behind stainless steel perf plate with ½" openings. The hopper is carbon steel with an option to come painted or galvanized.