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High - temperature environments can accelerate the aging of the sealing material of the sealing nut, reducing its elasticity and sealing performance. For example, rubber sealing elements may crack and harden under long - term high - temperature conditions, leading to a decline in sealing effectiveness. Generally, if exposed to a high - temperature environment above 80°C for a long time, the sealing effect may significantly deteriorate within a few months to one or two years.
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Low - temperature environments may make the sealing material brittle and lose its elasticity, resulting in sealing failure. For instance, in a low - temperature environment below - 20°C, some ordinary rubber - sealed nuts may fail to maintain good sealing within a few months or even less time.
High - humidity environments can easily cause rust and corrosion of metal parts, damaging the sealing interface between the sealing nut and the connecting piece. Especially for some sealing nuts without good anti - rust treatment, in a high - humidity and poorly ventilated environment, the sealing performance may be affected within 1 - 2 years. In a dry environment, the sealing effect can be maintained for a relatively longer time.
If the environment where the sealing nut is located contains chemical media such as acids, alkalis, and organic solvents, these media may corrode the sealing material or the metal nut itself. For example, in a chemical production workshop, the sealing effect of a sealing nut exposed to strong acids and alkalis may only last for a few months, while in a normal environment without chemical corrosion, the sealing effect can last for several years.
Different types of rubber materials have different sealing performances and lifespans. Nitrile rubber - sealed nuts have good oil - resistance, but their lifespan is short in high - temperature and strongly oxidizing environments. Under normal usage conditions, the sealing effect may last for 2 - 5 years. Silicone rubber has good high - and low - temperature resistance, and its sealing effect can be maintained for 5 - 10 years in a normal environment.
The nylon material of nylon - insert sealing nuts has certain elasticity and wear resistance. In a general environment, the sealing effect can last for 3 - 8 years. However, if it is affected by frequent vibrations, impacts, or excessive temperatures, its lifespan will be shortened accordingly.
The sealing effect of metal sealing nuts is relatively long - lasting. For example, stainless - steel sealing nuts can maintain a sealing effect for more than 10 years in a normal environment. However, if the metal surface is damaged or corroded, the sealing performance will also be affected.
Frequent vibrations and impacts can loosen the sealing nut and damage the sealing structure. For example, during the operation of some large mechanical equipment and vehicles, the sealing nut is subjected to continuous vibrations, and the sealing effect may significantly decline within 1 - 3 years.
If the pressure in the system where the sealing nut is located fluctuates greatly, it will cause repeated extrusion and stretching of the sealing material and structure, accelerating the fatigue and damage of the sealing material. In a high - pressure system with frequent pressure changes, the sealing effect may only last for 1 - 5 years, while in a system with stable pressure, the sealing effect will last longer.
The correct installation method and appropriate tightening torque are crucial for the duration of the sealing effect. If the tightening torque is insufficient during installation, the sealing material cannot fully function, and leakage may occur in the short term. On the other hand, if the tightening torque is too large, it may damage the sealing material or the nut itself, also shortening the duration of the sealing effect.
Regular inspection and maintenance of the sealing nut, such as cleaning and replacing worn sealing elements, can extend the duration of the sealing effect. If maintenance is carried out according to the specified maintenance cycle, the duration of the sealing effect can be several times longer than that without maintenance.
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JIALI FASTENER