Long tube positive pressure air breathing apparatus Main components
Hazardous gas detection, emergency escape, sound and light alarm, Gas bottle, hand-carrying car main body, wrap mill, decompression, dispenser, air supply valve, full cover, backpapers, air inapple hose, Y-shaped three-way joint.
Long-range positive air breathing apparatus parameter
gas cylinder working pressure is 30MPa
output flow rate is 450L / min
alarm Fraction 5 ± 5 mPa
The exhalation resistance and intake resistance of the mask of the guiding hose length of 30m
are ≤700Pa and ≥ 500Pa, respectively, and 2 people can be used.
Long-range positive pressure respirator method
This respirator is in use, must be equipped with supervisors, guardians should always monitor the gas source pressure and working conditions of the respirator. Guardians and users must have a reliable communication contact tool to ensure safe use. It is strictly forbidden to use this vapor in unmanned care.
Cylinder Removing and installation
The air breathing apparatus must have sufficient fresh air in the gas cylinder (gas cylinder air pressure is generally 28-30MPa), if gas If the gas storage of the bottle is insufficient, the gas bottle should be filled with a gas bottle and store the gas cylinder that is sufficiently air, the gas cylinder is removed and installed: turn off the cylinder valve, emissions, release the gas bottle bundle With, unless the cylinder connection nut, unload the gas bottle. After filled with air cylinders, install the gas cylinder in the opposite order of the cylinder. If a high-speed cylinder is required, the cylinder strapping mechanism is opened, and the appropriate length is adjusted.
System connection from the wrapper wheel frame and the long soft tube right hand holds the quick joint holder. The knot and index finger pinch the snap-fitting snippet to pull down the cassette seat and the soft tube from the wrapper wheel frame. Connect the soft hose and the gas supply valve to plug the long soft tube with the Y-shaped three-way joint. Plug the air supply valve and the short tube inserted with the Y-shaped three-way linker. Check the black rubber reset button on the edge of the air supply and airtight pressure gas valve side, so that the gas supply of the air supply valve is closed in the off state (red) in the closed state (small in the knob). The plane is parallel to the bottom surface of the air supply valve. Slowly open the cylinder valve, so that the system is full of pressure, and it will hear a short alarm sound, when the pressure gauge is stopped, observe the surface pressure, the high pressure table should be 28- The 30MPa range, the medium pressure table value should be in the range of 0.6-0.9MPa. Turn off the cylinder valve, observe the pressure representation value, 1 min pressure drop value must not exceed 2MPa. If the gas is not met, it is rotated next to the gas supply valve. The valve, release the gas intrauter gas, check the connection, find the problem to adjust, repeat the airtight inspection. Note: The breathing apparatus that does not meet the required respirator cannot be put into use, attached to the repair. Alarm pressure check After the alarm examination meets the requirements, the alarm pressure check is performed. When the gas cylinder valve is opened, the gas cylinder valve is turned off, and slowly open the bypass valve on the gas supply valve, and observe the pressure gauge to drop to 5- Whether the alarm whistle is sounded when 6MPa, if it is below this value alarm, adjustment must be adjusted. The supply valve is connected to the mask connection to check whether the O-ring on the air supply valve is clean and in good condition. A) will air supply valve The end is placed in front of the mask, and the flange of the air supply valve socket is inserted at the mask interface, gently replaced the air supply valve (about 900) when he heard the snoring, indicating that the installation is completed and locked, check Red lock pins are confirmed completely. Functional detection completely opens the cylinder valve (can be opened or open all over one). Wearing the mask to completely relax the headband, grab the bottom of the face mask, put the lower pick of the squat into the headband, and pull the head to the hair. Pull the tension strip according to the order: the lower buckle (the colloid head belt is: the lower portion, the upper, top), and cannot be observed. B) Check that the air supply valve open mechanism will take a deep breath, check whether the boiled mechanism is working properly. C) Positive pressure test Insert a finger into the mask seal and see if there is a stable airflow. Then take the finger, the mask seals again. The breathing is 10 seconds, listening to there is no leak, if there is a leak, relax the headband and adjust the position of the mask, and pull the tension in order again, never pull it too tight. The leakage is checked again according to this action again until the leak can be heard. When the respirator is satisfied, the reset button of the air valve is supplied, take the mask, and turn off the cylinder valve. D) When the gas cylinder valve is closed, the gas cylinder valve is temporarily opened, allowing the airflow to flow out the system, when the pressure gauge reading is reduced to 5.5 ± 0.5 MPa, the whistle should issue a loud alarm sound. At this point, the respirator function test is basically completed, and the spare can be saved.