What are the types of mechanical seals?

Different Types of Mechanical Seals for Centrifugal Pumps

• Balanced seals.
• Unbalanced seals.
• Pusher seals.
• Non-pusher seals.
• Conventional seals.
• Cartridge seals.

How do you describe a mechanical seal?

A mechanical seal is simply a method of containing fluid within a vessel (typically pumps, mixers, etc.) where a rotating shaft passes through a stationary housing or occasionally, where the housing rotates around the shaft.

What are the components of mechanical seal?

Every mechanical seal possesses five basic elements:

• One ring (usually the seal face) circulating synchronously with the rotating part (shaft)
• Secondary seal (usually O-ring) between shaft and ring.
• A stationary ring (usually the stationary seat) arranged in the stationary part (casing)

What is the function of mechanical seal?

Mechanical seals are devices that are used to provide a seal at the point of entry or exit of a rotating shaft. Typically it is used to prevent the leakage of one high pressure fluid into a lower pressure fluid.

What is gland in pump?

A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. The gland at the rotating shaft of a centrifugal pump may be packed in a similar way and graphite grease used to accommodate continuous operation.

What is function of mechanical seal?

What is the importance of mechanical seal?

Mechanical seals are intended to prevent the fluid (water or oil) used by a machine from leaking to the external environment (the atmosphere or a body of water).

Where are mechanical seals used?

They are used in various applications ranging from automobiles, ships, rockets and industrial plant equipment, to residential devices. Mechanical seals are intended to prevent the fluid (water or oil) used by a machine from leaking to the external environment (the atmosphere or a body of water).

Why do mechanical seals need water?

Mechanical seals require clean water, or other compatible liquid, for the lubrication of the seal faces. Lubrication can be provided from the pumped liquid itself or from an external source, depending on system requirements.

What is a bearing gland?

Gland. A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. The gland nut allows the packing material to be compressed to form a watertight seal and prevent water leaking up the shaft when the tap is turned on.

What is a packing seal?

Packing seals have been the most widely used sealing solution for many years. Packing seals use rope-like materials that wrap around the shaft of a pump, filling in dead space and minimizing fluid loss. Fluid leakage is stopped by either a wedge, V-ring or O-ring as the lapped faces collapse.

Why to use mechanical seals?

Why Use Mechanical Seals? Lower Mechanical Losses. Mechanical seals cause lesser mechanical losses compared to packed glands and thus makes the pump more efficient. Lesser Sleeve Wear. For mechanical seal fitted pumps handling clean, non-corrosive liquids, shaft protecting sleeve can be eliminated. Seals high pressure as well as low pressure. Seals high temperature liquids.

How to select a mechanical seal?

Type of Fluid to Be Pumped. The fluid that you’re pumping is the single most important factor to consider when deciding on a seal type.

What is the working principle of mechanical seal?

Rotating&Stationary Primary Sealing Elements. The more common end- or rotating-face mechanical seal designs feature mating faces as the primary sealing elements.

What are the different types of mechanical seal?

Gaskets. Made of flat,elastomeric or similarly flexible material,gaskets are used to fill in the space between the flat surfaces of stationary components in a joint to prevent fluid