The use of smoke exhaust fire damper has improved our safety guarantee. All of them are in HVAC cities in our country. Smoke exhaust fire damper can be seen in all major professions. The use of this fire damper has greatly improved our safety guarantee. However, leakage of the valve body joint surface of smoke exhaust fire damper may also occur during use. What are the main reasons for this phenomenon? Let's analyze it in detail:
1. The bolt tightening force of the joint surface is not good or biased, resulting in poor sealing of the joint surface. The elimination method is to adjust the bolt tightening force. When tightening the bolt, it must be carried out according to the diagonal tightening method. It is best to measure the gaps everywhere while tightening, tighten the bolts to a stop, and make the gaps everywhere on the joint surface common.
2. The flatness of the joint surface of the valve body of the smoke exhaust fire damper is too poor or is padded by hard impurities to form sealing failure. If the flatness of the joint surface of the valve body is too poor to cause leakage of the joint surface of the valve body, the elimination method is to grind the joint surface from scratch until it meets the quality specification. If the joint surface is blocked by impurities to form sealing failure, carefully arrange the joint surface to prevent impurities from falling into the valve assembly.
3. The tooth-shaped sealing gasket on the joint surface of the valve body of the smoke exhaust fire damper does not conform to the specifications. For example, the tooth-shaped sealing gasket has slight groove marks in the radial direction, poor parallelism, tooth-shaped over-sharp or over-slope and other shortcomings will all form sealing failure, thus causing leakage on the joint surface of the valve body. During maintenance, the quality of spare parts should be closed, and the tooth-shaped sealing gasket conforming to the specifications can be selected to prevent the occurrence.
In general, our common smoke exhaust fire damper is mainly used at the end of ventilation and air conditioning system. Its operating temperature is 70 ℃. In case of fire, the fire source should be separated from the air outlet. If the fire outlet of the fire damper is linked with the fan, it should be equipped with double micro-switch equipment. The air outlet of the fire damper is made of non-combustible materials. The rolling parts should be made of corrosion-resistant metal materials and rolling sensitive. The thickness should not be less than 2mm, yirong components shall conform to the approved specifications of the fire department.

Smoke fire valve can be seen in all major work. The use of the smoke fire valve has greatly improved our safety. However, in the process of application, leakage of smoke fire valve body joint surface may also appear. What are the main reasons for this phenomenon? Let's analyze it in detail:
1. The bolt tightening force of the joint surface is not good or tight, which forms that the joint surface is not well sealed. The elimination method is to adjust the bolt tightening force. When tightening the bolt, it must be carried out according to the diagonal tightening method. It is better to measure the empty fire damper everywhere while tightening, tighten the bolt until it is continuous, and make the joint surface empty everywhere together.
2. The flatness of the joint surface of the valve body of the smoke exhaust fire damper is too poor or is padded by hard impurities to form sealing failure. For leakage of the joint surface of the valve body caused by too poor flatness of the joint surface of the valve body, the elimination method is to grind the joint surface from the head until it meets the quality standard. If the joint surface is caulked by impurities to form sealing failure, carefully clean the joint surface during valve assembly to prevent impurities from falling.
3. The tooth-shaped gasket on the joint surface of the valve body of the smoke exhaust fire damper does not meet the standard. For example, the tooth-shaped gasket has fine groove marks in the radial direction, poor parallelism, and defects such as tooth-shaped over-sharp or over-slope will all constitute sealing failure, thus causing leakage on the joint surface of the valve body. The occurrence of this phenomenon can be avoided by controlling the quality of spare parts during maintenance and selecting the tooth-shaped gasket that meets the standard.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures