Service life of mechanical seal

The lifespan of a mechanical seal is closely related to its design, selection, manufacturing precision, installation accuracy, operating environment, and methods of use. If there are no issues in the design and manufacturing processes, its lifespan depends on installation, the operational environment, and how it is used. The materials used in the sealing friction pairs generally have a lifespan of over 3 years; however, factors such as improper installation, incorrect operation, and an unfavorable operating environment can reduce this lifespan. Conditions such as the absence of flushing and cooling systems, intermittent operation, liquid drainage, and severe corrosive environments can all lead to premature damage of the mechanical seal. Therefore, users must strictly follow the operating procedures for use and maintenance in order to ensure that the mechanical seal reaches its normal service life.

A service life of 3 years for mechanical seals is just our goal; in reality, the best ones we use here only last around a year, and we are already very satisfied with that. Admittedly, this is closely related to various factors such as design, processing, installation, and use, but the main cause is the low standards and poor practices that are entrenched in various industries within the country.

Yes, it’s also related to a company’s capacity to afford such things. Everyone knows that Mercedes and BMW are high-quality brands, but not many people can afford to drive them. We are currently in a stage of development, and I believe things will get better as we move forward.

I am a technical specialist in seal production. We have also designed seal products using the most advanced international technologies, but many companies focus solely on price; as a result, we fail to win bids time and again. With no other choice, we are forced to lower our standards. Honestly, we’re very anxious about this, but what can we do? Because enterprises are **, the separation of management rights and ownership leads to them choosing low-quality products even when they are aware of their short lifespan, simply because of the lower price. To be honest, compared to foreign countries, our level of manufacturing equipment is completely comparable, and the cost is only half of that in other countries. Yet, it’s unclear where the patriotism of our people goes at such times.

As a manufacturer of mechanical seals, what methods do you have to convince customers that your products meet high standards? As users, we place more trust in companies such as Foss, John Crane, and Borgman – this is the result of the high standards these suppliers have consistently maintained. Domestic manufacturers can only manage to establish a foothold in the market in this way.

A good brand takes time to build; as long as we maintain quality, I believe we will be able to surpass foreign brands.

I. Service life of pump seals in the petrochemical industry: According to API682, third edition, with a proper flushing scheme, all seals can operate continuously for 25,000 hours. Note: Since this item has strict requirements regarding processing, inspection, and on-site conditions, it is possible to specify a service life of 2 years when signing the agreement with the customer, based on the actual conditions of our company and the installation site; if the customer has other requirements, those shall be followed. II. Service life of pump seals in non-petroleum industries: According to JB/T4127.1-1999, when the medium to be sealed is corrosive, the service life of mechanical seals is 6 months to 1 year; for other media, it is at least 1 year. However, this limit does not apply in cases of harsh operating conditions. III. Service life of mechanical seals for kettles: According to HG/T2269-2003, when the working medium is a neutral or slightly corrosive gas or liquid, the service life is generally 8,000 hours; when the working medium is a more corrosive or highly volatile gas, it is generally 4,000 hours. IV. Service life of the compressor mechanical seal: As specified in the agreement, it is generally two years. IV. Service life of the compressor dry gas seal: According to API617, Version 7, it is five years of continuous operation. V. Service life of other seals: In accordance with JB/T4127.1-1999, when the medium to be sealed is corrosive, the service life of the seal is 6 months to 1 year; for other cases it is at least 1 year. However, this limit does not apply in situations with harsh operating conditions. Standards should be applied according to standards, and reality should be dealt with based on reality. The production level and technology in China are indeed much inferior to those of foreign countries; even when the level improves, the costs also rise, and ordinary companies cannot afford them. So, aside from the technical issues related to sealing itself, it is often related to the operating conditions of the machine as well. Old pumps have many problems – there’s always some issue here or there – and all of these end up affecting the seals. It can be said that among all the components of a pump (compressor), the seals are the most vulnerable and suffer the most. I’m often criticized by customers, asking why the seals are leaking again; in fact, it’s usually the bearings or rotor of the pump that have problems, which leads to unstable operation of the seals and ultimately results in their failure. Working with seals is tough

The quality of seal performance is related to many factors. Moreover, a two-year usage period should take into account repairs and the replacement of components. If it’s possible to achieve two years of useful life without any repairs at all, then manufacturers of seals abroad would suffer huge losses.

This isn’t absolute; we supply products to our customers, and the cost of a set of mechanical seals is just a few dozen yuan, yet they are sold for several thousand yuan. Many customers in China are willing to spend that amount of money

Magnetic fluid sealing does not require sealing fluid or a sealing system; there are no friction pairs between the stationary and rotating rings, so there is no frictional loss associated with these rings. It requires no maintenance, has a long service life, and ensures zero leakage. Let me find out.

To have horses run well without them eating grass – is there such a good thing in the world? API682 requires this; it also stipulates that the equipment must operate continuously without stopping, provided that an appropriate cooling system is in place. Tell me, which user can guarantee that? The mechanical seal can be made using the best materials to meet these requirements, but at the cost of a higher price, given that product quality must still be ensured. Are users willing to accept that? Focusing solely on the lifespan of the mechanical seal in this context is a lack of respect for such seals: lol

From -70 degrees to +150 degrees, the magnetohydrodynamic seal can operate properly without any need for compensation or cooling. Above 150 degrees, the internal design of the magnetohydrodynamic seal includes a jacket for cooling; currently, it can be used successfully at temperatures above 1000 degrees under the most extreme operating conditions.