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Sight Glass Pressure Sewer Tank Manhole Cover
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Sight Glass Pressure Sewer Tank Manhole Cover

The stainless steel manhole is a safety emergency ventilation device installed on the top of the storage tank. It is usually used in conjunction with fire extinguishers and mechanical breathing valves. It can avoid accidents caused by accidents caused by sudden overpressure or vacuum in the tank, and damage to the storage tank. It also has the function of safety and fire prevention, which is a safety device to protect the storage tank, and is especially suitable for the vaulted atmospheric tank with nitrogen topped by the storage material. It has the advantages of constant pressure discharge, constant pressure suction, flexible opening and closing, safe fire resistance, compact structure, and good sealing performance.
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  • SINOSS

Manholes have been shaped products, usually 600mm in diameter. The center of the manhole is generally 750mm from the floor. It is convenient for the staff to enter and exit the oil tank and ventilate during installation, cleaning and maintenance.

The manhole of the non-metal oil tank is set on the top of the tank, and the manhole of the metal oil tank is set on the lower ring plate of the tank wall. Most of them are round holes with a diameter of 600mm, with a center distance of 750mm from the bottom plate, which is used by oil tank cleaning or maintenance personnel to enter and exit the oil tank. It is also called a door. Use manholes for lighting and ventilation at all times during maintenance and cleaning of oil tanks. The capacity of the vertical oil tank is 5000m³; 1~2 manholes are provided for those below 5000m³, and 2 manholes are provided for those above 5000m³. The installation of the manhole should be no more than 90° away from the oil inlet and outlet pipelines. When there is only one manhole, it should be placed on the opposite side of the light-transmitting hole on the top of the tank; when two manholes are provided, one of them should be located on the opposite side of the light-transmitting hole, and the other should be at least 90° apart from the personal hole.


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