Product Introduction
Floating roof oil tank bladder type primary sealing device, abbreviated as: bladder type primary sealing, is one of the primary sealing forms widely used in various large and medium-sized floating roof storage tanks at home and abroad. The primary seal of the capsule-type three-core structure is mainly composed of rubber sealing bands, elastic elements, support assemblies and pressure plates. It has the advantages of wide use, safe operation, simple maintenance, and long service life. Due to the use of liquid immersion seals, the sealing effect Excellent.

working principle
There is an annular space between the tank wall plate of the floating roof storage tank and the edge plate of the floating roof. The volatilization of stored oil through the annular space is one of the main forms of oil loss. The capsule-type three-core structure The capsule-type primary sealing device makes the rubber sealing band form a regular bag shape through the metal supporting assembly, the pressure plate and the sealing support plate and other metal components. The filled elastic element makes the rubber sealing band close to the tank wall, and the capsule The bottom of the tank is immersed below the liquid level of the stored oil, preventing the formation of oil and gas space and blocking the leakage of the oil in the tank to the outside of the tank, thereby effectively reducing the volatilization loss of the oil.
The equipotential connection guide piece forms an equipotential connection between the primary sealing device components and the floating roof of the storage tank, which further improves the safe operation coefficient of the storage tank.
Selection of rubber sealing tape
The nitrile rubber sealing tape is made of NBR/PVC rubber-plastic blend compound, which has excellent oil resistance, aging resistance, abrasion resistance, low air permeability and good low-temperature performance. It is suitable for non-polar and weakly polar oils. It has excellent resistance to solvents and solvents, but does not have resistance to more polar solvents such as aromatic solvents, halogenated hydrocarbons, ketones and esters. It is suitable for crude oil, gasoline, diesel and other oil products.
The fluorine rubber sealing tape is made of FKM rubber material, which has excellent corrosion resistance, high temperature resistance, wear resistance, weather aging resistance, excellent gas permeability resistance and good low temperature performance. It is suitable for aromatic hydrocarbons, high aromatic oils, and various Crude oil and fuel oil, solvent oil, hydraulic oil and lubricating oil, halogenated hydrocarbons, concentrated acid, etc. have excellent resistance to resistance, but not resistant to certain ketones, esters, ethers, suitable for crude oil, gasoline, diesel, etc. Oil and chemical solvents such as toluene and xylene.