WELLTECH COOLING SYSTEMS Pvt. Ltd. is a major manufacturer, supplier, stockist and exporter of high quality heat exchangers. For efficient operations most industrial applications use some cooling medium, which are generally fluids. In turn heat exchangers are used to cool such fluids. Heat Exchanger is an industrial equipment which transfers heat from one medium to another during the manufacturing process. Heat is transferred by means of conduction and convection through the exchanger material which separates the medium being used.  The hot fluid is cooled by rejecting heat to the cold medium. Heat exchangers are widely used in various industrial applications such as Injection moulding machine, Blow moulding machine, hydraulic press, furnace, pharmaceutical plant, food processing, dairy, chemical process, engine, refrigeration to name a few. There are two major kinds of Heat Exchangers – Shell & tube type heat exchangers and Gasketed Plate Type Heat Exchangers. Delta Cooling Towers Pvt. Ltd offers both types of Heat Exchangers.  With over 25 years of experience in process heat transfers, we deliver sector specific client proven solutions.

The range of products comprises plate heat exchangers – bolted and brazed as well as oil / air cooling units and other type of heat exchangers. Heat transfer plates in Welltech are manufactured with latest quality standards having a fully automatic press of capacity 15,000 Tons. 

WELLTECH focuses on customer orientation, highest quality standards, flexibility and advisory skills, important benefits a company of just the right size is able to offer. 

Thus, as one of the few producers worldwide, FUNKE offers a wide range of plate heat exchanger (PHE) solutions with optimum thermodynamic designs for different industries and virtually all applications.

Design and Functions of Plate Heat Exchanger
The heart of a PHE is a pack of embossed plates with apertures. The plates are assembled in a 180° angle to each other, resulting in flow gaps on each side. Each plate is provided with a gasket, which securely seals the flow gaps from the atmosphere and separates the two media used in the heat exchange.
The gasketed plate pack is mounted in a rack and is compressed with tightening bolts between the fixed plate and the movable plate. To guarantee maximum heat transfer, warm and cold media are normally fed through the PHE in one-pass or multi-pass counter flow.
Connections are on the fixed plate, but can also be on the movable plate for multipass flow

Plates Materials
WELLTECH heat transfer plates are always produced in 1.4401 / AISI 316 as this material is generally more corrosion –resistant and more resistant to chloride damage than 1.4301/AISI 304. Depending on the design, Titanium is also available in serial production.
As an option, the following additional material may be used:1.4301/AISI 304 (cost-effective in the case of uncritical media)1.4539/AISI 904L (with high nickel content against stress corrosion cracking, good price/performance ratio in the case of media with the low acid and chloride content).1.4529/254 SMO (higher chloride and acid – resistance than 1.4401/ AISI 316)Hastelloy (highly resistant against acids and chlorides, e.g. for concentrated sulphuric acid)Titanium ASTM B 265Titanium – Palladium (highest material quantity, suitable e.g. for chlorides at higher temperatures)
Gaskets Materials
All gaskets are installed twice in the entry and exit area, creating a safety room which is open to the outside. It prevents the two media from mixing if the gasket leaks.Depending on the design and the type, adhesive or nonadhesive (clip-system) gasket may be used. As sealing material, we use well known and tried and tested materials such as:NBR (nitrile-butadiene rubber): Universal use for aqueous and unctuous media e.g. water/ oil applications.EPDM (ethylene-propylene rubber): Wide range of applications for many chemical compounds which do not contain mineral oil and grease, and for water-and steam applicationFlororubber (viton): Extremely resistant to chemicals and organics solvents as well as sulphuric acid and vegetable oil at high temperatures.
Technical Advancement of Gasket
Very high heat transfer rates due to thermodynamically optimized design.Corrugation fields with “Off-Set” embossing allow for symmetrical and asymmetrical flow gaps
(1).Specially embossed entry fields for an optimum distribution of media (2).Gaskets fastened by “Clip-system” for easy maintenance.Gaskets have a special ribbed surface, enabling more exact centering and stabilization of the entire plate pack
(3).Double gasket with leakage groove between two media, preventing mixing of the media
(4).Special plate profile at the edges, reinforcing the plate pack and ensuring high pressure resistance of the gasket during operation (5).

Gasketed Plate Type Heat Exchanger has following sections:

  • Plate pack:It consists of cold-stamped and corrugated plates. The design dependsupon heating application and number of plates.
  • Gaskets:Ensures isolation of plates from each other along with proper distribution of fluid.
  • Fixed frame: Is the immovable plate used as a structure
  • Movable frame:Used for tightening and assembly of plates
  • Bottom bars:Guides the plates at the bottom
  • Top bar:Placed between the fixed frame and supporting column upon which the plates are suspended