Mechanical seal compression measurement is an important step in mechanical seal installation and verification. This article explains the measurement method, preparation requirements, measurement steps, and key precautions to ensure accurate determination of mechanical seal compression and reliable seal performance.
This article addresses key installation and operational requirements for low temperature mechanical seals in cryogenic centrifugal pumps. It covers the copper sleeve’s thermal balance and anti-contact functions, axial compression value control, the necessity of thorough precooling to prevent thermal shock and vaporization, and the critical manual shaft rotation check to verify seal condition and installation quality before startup.
Understanding Low Temperature Mechanical Seals for Cryogenic Centrifugal Pumps Read More »
Low temperature mechanical seals are specially designed for cryogenic centrifugal pumps, ensuring reliable sealing performance in LNG, liquefied gas, and extreme low-temperature applications down to -196°C.
The carbon ring seal is a non-contact floating seal and a type of floating ring seal. Its sealing principle is based on the formation of a gas film between the carbon ring and the shaft sleeve. This gas film creates a throttling effect and gradually reduces the pressure, thereby preventing medium from leaking. The following sections describe its structure, operating principle, advantages, applications, and technology trends.
Selecting the right shaft seal is essential for improving the reliability, efficiency, and service life of industrial fans. This article compares five common fan sealing technologies—packing seals, labyrinth seals, carbon ring seals, mechanical seals, and dry gas seals—by evaluating their sealing performance, operating conditions, maintenance requirements, cost, and application suitability. It also provides practical guidance on selecting the most appropriate sealing solution for different operating environments. Among these technologies, carbon ring seals offer an excellent balance of performance, reliability, and cost, making them a preferred choice for a wide range of industrial fan applications.
Fan Shaft Seals: Types, Comparison, and Selection Guide for Industrial Fans Read More »
Dry gas seals are widely used in both screw compressors and centrifugal compressors, but their designs differ significantly due to variations in speed, axial movement, gas cleanliness, and operating conditions. This article compares the key differences and highlights important selection considerations to improve seal reliability and service life.
Dry gas seals have become the mainstream sealing technology for centrifugal compressors due to their outstanding performance and reliability. They not only effectively prevent gas leakage and ensure stable compressor operation but also perform well under demanding operating conditions, helping extend equipment service life.
Dry Gas Seals for Centrifugal Compressors: Principles, Advantages, Types, and Selection Read More »
Mechanical seal failure is mainly caused by lubrication loss, corrosion, high temperature, and seal face wear. Dry friction, liquid film vaporization, corrosive media, and thermal cracking can seriously damage seal components. In addition, abrasive particles, improper operating conditions, and unsuitable balance ratios may accelerate wear, reduce sealing reliability, and shorten service life.
Dry gas seal failures are mainly caused by poor seal gas quality, improper operation, vibration, and installation issues. Liquid or contaminants entering the seal gas can destroy the gas film and damage seal faces. Proper filtration, correct operating procedures, stable equipment conditions, and reliable auxiliary systems are essential for ensuring long-term seal performance and reliability.
