What does the spring in a mechanical seal do?
Various types of spring mechanisms are used in mechanical seals to supply the pressure to keep the stationary and rotating seal faces together. They can be divided into four general types: single spring, multiple spring, wave spring and metal bellows.
What are types of double mechanical seal?
There are three ways seal faces are configured / arranged in double mechanical seals: Back-to-Back, Tandem, and Face-to-Face. Each configuration has its own strengths which are addressed below.
What is Tandem mechanical seal?
A tandem seal is the Grundfos name for a shaft seal system where an additional sealing chamber has been mounted on the existing shaft seal. The purpose of the sealing chamber in a tandem seal pump is to guarantee that liquid does not leak from the pump housing.
How does a dual mechanical seal work?
A double mechanical seal consists of two seals arranged in a series. The inboard, or “primary seal” keeps the product contained within the pump housing. The outboard, or “secondary seal” prevents the flush liquid from leaking into the atmosphere. Two rotating seal rings are arranged facing away from each other.
What is difference between single and double mechanical seal?
A single mechanical seal is typically used when the process fluid that is pumped presents little to no risk to the environment. What Is A Dual Mechanical Seal? A dual mechanical seal consists of two seals arranged in a series. The inboard seal keeps the product contained within the pump housing.
Why use a double mechanical seal?
Double (or dual) mechanical seals are designed to ensure maximum sealing safety. These seals virtually eliminate leakage of the fluid or gas being handled in pumps or mixers. Double seals provide a level of safety/zero emissions compliance not possible with single seals.
How long does a mechanical seal last?
three to five years
The typical life expectancy for a mechanical seal of this type balances a variety of factors, including the operating conditions and environment, although three to five years is a reasonable industry estimate.
How do you maintain a mechanical seal?
5 Ways to Maintain Mechanical Seals
- Understand your Conditions. Pressure, temperature, and speed are all factors that can contribute to a worn seal or increased leakage rate.
- Know Seal Face durability with Liquid.
- Know the reason for Seal Face Wear.
- Reduce Vibration.
- Proper Lubrication.
Do mechanical seals require seal water?
Mechanical seals require clean water, or other compatible liquid, for the lubrication of the seal faces. The faces in a typical mechanical seal are lubricated with a boundary layer of gas or liquid between the faces.
How can we prevent mechanical seal failure?
4 Ways to Prevent Seal Failure
- Choose the Correct Seal. Lack of knowledge and information is an obstacle in the seal selection process.
- Properly Install the Seal.
- Prevent Excess Heat Generation.
- Maintain Proper Storage Conditions.
Do you lubricate mechanical seals?
Lubrication is necessary for proper mechanical seal installation. Lack thereof can damage o-rings or rubber bellows on the seal, causing them to tear, or roll.