Safety seal and combination seal
Marble Saw,Marble Cutting Saw,Marble Cutter Tool,Marble Saw Cutting Machine ZHENGYANG TECHNOLOGY CO.,LTD , https://www.supraone.com
Safety seal
(1) The backup seal is in which the main seal is working and the sub-sealing is in the standby state. There are non-contact temporary seals and contact wear seals in the spare seal. When the former is in the main seal operation, the spare seal is temporarily placed, which is a non-contact seal. Once the main seal is damaged, the backup seal serves as a backup safety function while the alarm is issued. The latter is always in contact, and the backup seal is replaced when the main seal is damaged.
(2) Cascade sealing Two sets of seals work in series, the inner seal works, and the outer seal plays a safety role. John Crane has dry tandem seals (D-Tengem~als) and wet tandem seals. The former uses a gas end face seal to proudly seal the latter. The latter uses a common liquid end face seal as a secondary seal.
(3) The seal that suppresses the seal on the side of the atmosphere is called suppressing the seal. It plays a role in safety and environmental protection: controlling the atmospheric side to escape to the atmosphere when the main seal fails, controlling the environment around the main seal; protecting the bearing Affected by backing or sealing leakage irrigation · Increase the safety of the device and the human body.
Combined seal
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The mechanical seal can be combined with other seals to form a superior combination seal that is superior to the former.
(1) mechanical seal - spiral seal, using a spiral seal as a front seal. Reverse transfer pressure, reduce mechanical seal load, often used for high viscosity oil pump seals.
(2) Mechanical seal - labyrinth spiral seal, using labyrinth spiral seal as pump stacking wheel and throttling device, and inverting to form a closed loop flushing circuit to improve the sealing environment and prolong the sealing life, such as heat pump sealing.
(3) Mechanical seal—The float ring seal has two forms: the float ring acts as an atmospheric side seal and acts as a blocking liquid seal I or a floating ring as a back cold water seal (suppressing the seal).
(4) Mechanical seal—soft packing seals the moving ring tank soft packing ring to form a combined seal. There are also other combinations of various mechanical seals.
Scope of application: There are granular fluids and their media, steam, organic solutions, acids, alkalis, etc., applied to the sealing of machinery, pumps, valves, pipes, containers, etc. used in fluid conveying equipment.
Features: The filler has excellent lubricity and wear resistance. The most outstanding performance is high strength, high grinding capacity, good chemical resistance, high rebound, low cold flow and easy disassembly. It is especially suitable for dynamic sealing parts containing solid particle media.
Technical Parameters:
Temperature: -100 ° C ~ +300 ° C
Pressure: 35MPa
Chemical resistance: PH value 2-13
Aramid carbon fiber mixed packing
Scope of application: water, sea water, steam, various oils, solvents, weak acid, alkali, ethanol and other grinding media, used in chemical fiber, fertilizer, oil, ethylene, pharmaceutical, sugar, paper, electricity and other industrial high-pressure pumps, valves , the sealing of the reaction kettle.
Features: The filler has the characteristics of good thermal conductivity and small friction coefficient, especially suitable for telling the sealing of the running part.
Technical Parameters:
Temperature: -80 ° C ~ +280 ° C
Pressure: 35MPa
Chemical resistance: PH value 2-13.
Hebei Innovation Sealing Material Co., Ltd.
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