Mechanical Sealing for Pumps Requires High Attention in Procurement and Installation Processes

We always encounter situations where the sealing rubber ring is damaged during use of the pump. Once damaged, it needs to be replaced. As an engineering technician, the first step is to determine the type of pump to purchase the corresponding caliber of mechanical seal. Due to varying prices of mechanical seals in the market, there are differences in inherent quality. Therefore, purchasing personnel are required to determine which seal to purchase according to the company's needs.

Selection of mechanical seals for pumps

In order to meet the needs of actual application changes in parameters such as the size of the shaft, speed, sealing pressure, temperature, and medium characteristics, multiple designs have been derived for mechanical seals. They are classified by their operating principles and structures, and by the number of seal faces as single end face, double end face, and multi-stage series mechanical seals.  A single cartridge mechanical seal consists of a pair of seal faces. A double end face mechanical seal consists of two pairs of seal faces facing each other or back to back. A multi-stage mechanical seal consists of two or more pairs of seal faces arranged in series. They are categorized by the pressure state of the sealed fluid as single-stage, double-stage, and multi-stage seals. A single-stage seal requires the sealed fluid to be in a single pressure state, while a double stage seal requires the sealed fluid to be in two pressure states. The former is the same as a single end face mechanical seal, while the latter is arranged by connecting two double ends face seals in series in which the pressure of the sealed fluid decreases successively, and it can be used in high-pressure work.

Although they are all rubber products, there are still significant differences in the experience of using seals with various prices. High-quality seals have better sealing performance and longer service life, but they also entail higher costs. Some inexpensive mechanical seals have somewhat inferior performance and require attention to many issues during installation. Procurement personnel should be aware of this and carefully select mechanical seals according to the different types of equipment they have.

The materials of mechanical seals for pumps vary, but the installation methods are the same. The installation must be in place, and it must be repeatedly checked before use. In addition, it needs to be tested using water or other substances for airtightness because it operates under high vacuum speed and tremendous power, all of which rely on the motor to drive. If the mechanical seal is not well made, it will require additional force from the motor, increase energy consumption to increase costs, and it will not achieve a good effect. Therefore, one should not underestimate the impact of a small sealing rubber ring on work.Under the circumstances, it is important to find a reliable rubber seal factory.

Installation of mechanical seals for pumps

Attention should also be paid during the installation of mechanical seals for pumps. They must be installed securely so that the pump can operate to its fullest capacity. If the airtightness and water tightness are insufficient, they should be reinstalled. Some pump seals need to be installed correctly with positive and negative differentiation. If one finds that the installation is incorrect, it should be immediately corrected. Ultimately, if one wants the pump to work under normal operating conditions, the sealing of the pump should be given significant attention.

Generally speaking, the pump's operating process often brings about significant thrust. Since the vacuum adsorption method is used, many forces are emitted onto the wall around the pump. At the same time, the mechanical seal for pumps also withstands many external forces. Under such mutual actions, the sealing rubber ring not only must have a corrosion-resistant role, airtightness role, and water tightness role but also plays a role in maintaining the stability of the pump interface and has a certain buffering effect.