Radiators with heat dissipation 30-35% higher than plate-type radiators.

The radiators of JSC "ChTZ" are made from round steel tubes, which are reshaped into an ellipse on our automated production line and welded to the ends using steel caps in a row of 9 tubes. The total length is 510 mm. The elements undergo another stage of welding, where they are connected to each other by welding both the bottom and top of the manifold, allowing the oil to be evenly distributed inside the radiator. This unit consists of a minimum of 4 elements and a maximum of 32, forming the radiator body to which two flanged pipes are welded. It is also possible to add 2 or 3 down pipes depending on the transformer configuration. The flanges are standard, 150*150 mm, with 4 holes for connection to the transformer flanges. If you need custom flanges, JSC "ChTZ" will provide them.

Additional accessories are then welded to the manifold: lifting rings, ventilation and drain valves, as well as mounting plates. Depending on the customer’s requirements, we can also install supports for fans, thermometer housings, or any other necessary accessories. After the entire radiator is assembled, a leak test is conducted at a compressed air pressure of 5.5 bar in a water pool to ensure no leaks. Finally, the radiator is sent to the painting workshop: it is cleaned from the inside with filtered transformer oil, sandblasted, degreased, and then painted using immersion or flow method as per customer requirements. The final finishing and packaging are the last operations performed on the radiator before it is shipped to customers.

The oil used in the process is filtered through a moisture removal system connected to the equipment for reuse in subsequent cycles, avoiding disposal.

This washing process removes metal residues left inside the radiator tubes.

JSC "Chirchik Transformer Plant" radiators with an oval tubular design have a significant advantage over plate radiators even in terms of internal cleaning. The oval tube is much smoother and therefore easier to clean than two welded steel sheets with numerous corners where contaminants can accumulate.

Before any type of painting, we treat 100% of the metal surface with sandblasting to white metal, in accordance with SSPC-SP5-63 specifications established by the Steel Structures Painting Council, with a maximum profile thickness of 20-30 µm. The appearance of the sandblasted surface must comply with class Sa3, according to the Swedish Standard SIS 055900-67. Within 24 hours, we apply a primer layer to the radiator to prevent oxidation. If specifically requested in the order, hot-dip galvanized radiators will be supplied in accordance with UNI-EN ISO 1461 standards. The mechanical construction of our radiators prevents deformation during hot-dip galvanizing. Depending on environmental conditions and required warranty, in cooperation with our paint supplier, we can recommend the appropriate product and application cycle.

The company paints surfaces according to EN ISO 12944-5 standards, adhering to the specified coating thickness based on the chosen operating cycle, which can be water-based or solvent-based. Depending on the acrylic, epoxy, or polyurethane materials used, each environmental class defines the minimum and nominal thickness required for the specific class. The company guarantees environmental classes from C3 to C5, M-H-VH, and CX for land applications. The operating cycles of JSC "ChTZ" are approved for environmental classes.

 NDFT = nominal dry film thickness

AO “CHTZ” has over 15 years of experience in packaging and delivering radiators worldwide, using custom-made pallets designed according to radiator dimensions and treated wood for countries that require it. Our radiator packaging method is the result of many years of continuous improvement.

Some notable examples include:

• In-house pallets manufactured to custom specifications
• Rubber pads to prevent damage between radiators
• Rubber caps to prevent water ingress into the radiator
• Galvanized mating flanges with gaskets
• Special packaging
• Very detailed and clear labeling