Mechanical seals are essential components of pumps, compressors, and other rotary equipment that transfer fluids. These seals prevent the fluid from leaking out of the equipment and into the environment, thus ensuring safety and preventing damage to the equipment. In this post, we will discuss the construction, materials, and types of mechanical seals.
Mechanical seals are constructed of several parts: a stationary part called the seal gland, and a rotating part called the seal head. The seal head rotates with the shaft and is held against the seal gland by a spring. A sealing element is located between the seal head and the seal gland, which is typically a soft material like carbon or ceramic.
The choice of material for mechanical seals depends on the fluid being transferred and the operating conditions of the equipment. Common materials used for mechanical seals include carbon, ceramic, tungsten carbide, and silicon carbide.
There are several types of mechanical seals, including pusher seals, non-pusher seals, cartridge seals, and split seals. Pusher seals use a spring to maintain the seal head in contact with the seal gland, while non-pusher seals rely on fluid pressure to maintain contact. Cartridge seals are self-contained and can be easily replaced, while split seals are designed for use in equipment with limited access.
In addition to the type of mechanical seal used, the design of the seal chamber is also crucial for proper sealing. The seal chamber should be designed to ensure that there is no turbulence or eddying of the fluid, which can lead to premature wear and failure of the mechanical seal.
Mechanical seals are widely used in various industries, including chemical, pharmaceutical, and oil and gas. They are an essential component of pumps, compressors, and other rotary equipment that transfer fluids. Proper selection and installation of mechanical seals can help ensure efficient and safe operation of the equipment.
Some best well-known manufactures for mechanical seals are listing below:
