0895 has been molded products manhole quick open manhole diameter is usually 600mm. Manhole center from the floor generally 750mm. Facilitate staff in the installation, cleaning, maintenance and out of the tank or ventilation. Non-metallic tank manhole in 0895 on top of the tank quick opening manhole manufacturers, manhole metal tank located under the most laps in the tank wall board. Most of 600mm diameter hole at its center from floor 750mm, tank cleaning or maintenance personnel to access the tank with, also called door. Maintenance time to clean the tank using human light and ventilation holes. Vertical tank capacity set from 1 to 2 people in the 5000m 3 less holes, 5000m 3 2 people located above the hole. Manhole should be installed out of the oil pipeline at intervals not greater than 90 °. When people have just one hole, the top of the tank should be placed opposite the aperture; When set two individual holes, one located opposite the aperture, the other should be separated by at least 90 holes with the first person ° In normal operation Fire breathing valve, pressure relief manhole remain substantially sealed state in the normal tank pressure. When breathing valve work can not meet due to accidental causes sharp tank overpressure relief manhole cover automatically open the top of the relief, emergency relief 0895 quick open manhole quality, so that the tank pressure remains normal; When the tank drastically reduced the pressure or ultra-high vacuum, the suction valve will open sharply inhaled air, maintaining a normal tank pressure; When inhaled air with sparks, flame, fire resistant layer acts as "wall effect" to prevent the flame passed to protect the safety of the tank. Parameters Features: Housing Material Carbon Steel, Stainless Steel [Yunfu 0895] _0895 quick open manhole quick open manhole quality _ million harbor harbor provided by the million. Welcome to consult Hebei Billion Pipeline Co. (www.hbyhgd777.com), be sure to specify when contact is through the "Business Alliance Member" see, thank you! Contact: Lu Shouan