fire control valve type:
① Gravity fire dampers are divided into rectangular and circular types. Fire dampers are normally open. When the valve needs to be opened from scratch, loosen the bolt in front of the self-locking reed, hold the operating rod in hand, shake up the valve plate or blade, connect the fusible sheet, straighten the self-locking reed, and tighten the bolt to recover the normal working condition of the fire dampers.
② spring type fire damper, spring type fire damper has two kinds of rectangular and round, when the need to open the valve from the beginning, install the fusible piece and temperature fuse, shake up the blade or valve plate and fixed in the temperature fuse core, the fire damper will recover the normal working condition.
③ Spring type fire control valve, there are two kinds of rectangular and circular, usually open as a fire control valve for air volume adjustment, when a fire occurs and the air temperature is higher than 70 ℃, the fusible plate melts, causing the fuse pin to lay the clutch plate, the clutch is disengaged, the two ends of the shaft are changed, the spring is released, and the valve blades are closed.
The smoke fire control valve, rectangular and circular two, can be applied to the requirements of the air conditioning smoke fire, ventilation system, its structure and fire valve fire control valve is basically the same, reset method and air volume adjustment method and fire control valve the same.
⑤ fire air vent, used in the ventilation, air conditioning system with fire protection requirements of the air supply, air return and exhaust outlets.
⑥ Pneumatic fire damper is used for ventilation, air conditioning air duct and pneumatic fire damper linked with haloalkane 1211 and 1301 active rescue system. When the pneumatic fire damper is manually reset, the system must be relieved of pressure first, then reset and turned over.
⑦ The electric fire damper is installed on the ventilation and air conditioning ducts required for fire prevention. In case of fire, the power supply is blocked, the reset spring immediately closes the valve, and the valve can be turned on and reset after being energized.
The electronic automatic control smoke fire damper, the use of electronic technology and logic circuit technology, fire when the initiative to open or closed, and active alarm, the selection of the controller for one or more smoke fire damper control.

Fire control valve body joint surface leakage factors what.
First, the bolt tightening force of the joint surface is not good or tight, which constitutes a poor seal of the joint surface. The elimination method is to adjust the bolt tightening force. When tightening the bolt, the fire damper must be tightened diagonally. It is best to measure the open space everywhere while tightening, tighten the bolt until it does not move, and make the joint surface common everywhere.
Second, the tooth-shaped gasket on the joint surface of the valve body 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 the joint surface of the valve body to leak. During maintenance, the quality of spare parts should be controlled, and the occurrence of this phenomenon can be avoided by selecting a tooth-shaped gasket that meets the standard.
Third, the flatness of the joint surface of the valve body is too poor or it is padded by hard impurities to form sealing failure. For leakage of the joint surface of the valve body caused by poor flatness of the joint surface of the valve body, the elimination method is to grind the joint surface from the beginning until it meets the quality standard when the valve is collapsed. If the joint surface is blocked by impurities to form sealing failure, carefully arrange the joint surface to avoid impurities from falling in.

How to adjust the fire conditioning valve, view.
Fire control valve daily check and adjustment is required to do every day, because this and the work efficiency of the fire control valve and the fire valve with a close contact life, if you want to make the fire control valve invention greater value, then please pay attention to the fire control valve daily check and adjustment.
Fire control valve is a kind of equipment to avoid fire extension. In general buildings, it is usually installed at the entrance of the fan used for both smoke exhaust system and ventilation and air conditioning system. The fire control valve is usually in a normally open state. When a fire occurs, the airflow temperature in the pipeline rises to the fuse and the fuse is easy to melt. When the temperature is reached, the fusible sheet melts, and the core rod is pushed by the spring to disconnect the fork plate. The valve shaft rotates by the torsion spring to close the valve shaft.
At ordinary times, if it is required to adjust the air volume, the valve opening can be adjusted through the handle linked with the valve shaft. When the requirement is reached, the butterfly nut will fix its position. The contact between the fork plate and the handle is provided with ring teeth to avoid sliding after meshing, so as to insist that the valve opening will not change after adjustment.
For the fire control valve daily view and adjustment needs to consider some of the issues, temporarily introduced to us here, trust us only in accordance with the above described a few points, will be able to extend the service life of the fire control valve.
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