Door seal. Cord sealing ceramic. Equipment for boilers
To seal the doorways and technological hatches of the boiler, it is necessary to use special sealing elements that can withstand exposure to high temperatures for a long time without losing elasticity.
The seal for the door must have thermal insulation properties. For this purpose, often used:
- ceramic cord
- cord basalt
- asbestos cord
The door seal prevents combustible gases from the boiler from entering the room. The boiler operates in the correct mode when it has a strictly metered local supply of oxygen through technological openings, and not through leaking doors. According to the safety requirements for the operation of solid fuel boilers, the doors must fit snugly against the boiler body. The seal for the door must be flexible and repeat the shape of the opening, have high heat resistance.
Cord ceramic sealing
In BRIK boilers, a ceramic cord is used as a door seal.
The core of the ceramic cord: kaolin wool (mullite-silica fiber) is produced by melting pure oxides of aluminum and silicon, followed by blowing to the required density, the number of grams per cubic centimeter.
Ceramic Cord Braid: Glass roving (braided strand of continuous glass fiber) that creates a tight sheath of heat-resistant cord.
Mullite-silica fiber, from which the ceramic cord is made - a door seal - has the following properties:
- high temperature resistance
- low heat capacity
- low thermal conductivity
- elasticity, tight fit to structures
- refers to non-combustible materials
The seal for the door in BRIK boilers is a soft cord in a dense braid. A flexible and durable cord with thermal insulation properties follows the contour of the doorway and fits snugly to the surface.
The ceramic cord has the following characteristics:
- operation at high temperatures (up to +1250℃) is allowed
- low thermal conductivity
- does not absorb moisture, does not rot, is not subject to chemical decomposition
- the range of manufactured shapes (round, oval, square, rectangular section) allows you to choose a seal for the door of exactly the geometry that is required for more complete sealing.
asbestos cord
Asbestos cord acts as a heat-insulating, heat-resistant, sealing material. Withstands high temperatures and insulates surfaces from thermal effects up to 400℃. Asbestos is a fine-fibrous mineral from the class of silicates with a fibrous structure (it resembles wool or cotton in appearance).
Asbestos cord is produced in three grades:
- SHAON (general purpose asbestos cord).
- ShAP (asbestos down cord)
- SHAU (asbestos sealing cord)
Composition: chrysotile asbestos fibers, has a complex chemical formula, structurally related to layered silicates.
Scope: sealing and thermal insulation of joints in various thermal units. The asbestos cord can be used in different environments: gas, steam, water.
Asbestos cord is not used as a door seal in the BRIK boiler. Asbestos dust is a carcinogen and, when inhaled, has a negative impact on human health. Use of this material is not recommended in European Union countries. In BRIK boilers, an asbestos-free heat-insulating sealing ceramic cord is used as a door seal, which can withstand much higher temperatures.
Cord replacement
Cord sealing ceramic is a consumable. Cord replacement is required in case of physical wear or loss of elasticity.
Replacing the cord is not difficult.It is necessary to remove the old ceramic cord from the groove and place a new one around the perimeter of the door in its place. Then, with a little effort, close the door several times for a tighter installation of the cord in the niche of the door plate.
Door seal - ceramic cord - you can always order from our production by calling:
(067) 270-70-30
(050) 270-70-30
Oven door seal TEPLODAR
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