Selecting a seal flush piping plan for your single mechanical seal

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SELECTING A SEAL FLUSH PIPING PLAN FOR YOUR
SINGLE MECHANICAL SEAL
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• A mechanical seal requires frequent repair and
  replacement.
• It is a costly thing.
• Therefore, it is important to follow some
  principles to choose the best seal flush plan for
  the single mechanical seal.
• It allows the seal to operate in an environment
  that ensures optimal seal life without increasing
  cost from dilution of product or use of water.
• This blog brings different flush piping plans and
  how to choose the right one among them.

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1 NO FLUSH PLAN
You can choose no flush plan in the following
conditions

• When the pump fluid is clean
• The fluid maintains temperature within the
  maximum and minimum limits of the seal
• The fluid is compatible with the components of
  the seal
• When there is no risk of solidifying or
  vaporizing of the fluid due to the friction heat

If this plan is used, then the chamber must be
either tapered or self-venting.
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2 BYPASS FLUSH PLAN
If you want to choose the Bypass flush plan, then
make sure these conditions are fulfilled

• The fluid is compatible with the components of
  the seal
• The fluid contains solid that can put an adverse
  effect on the seal
• The temperature of the pumped fluid goes beyond
  the maximum temperature of the seal

In this method, piping runs from the point of
pump discharge to the point where the flush
connects to the seal gland. Thus, the fluid gets
a flow, it passes through the seal and goes back
into the pump via the chamber throat of the seal.
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• Alternatively, the fluid can be directed back to
  the pump section from the flush connection on the
  seal gland. It results in an opposite flow. The
  operating pressure at the seal drops by this
  method.
• To make the process easy, sometimes, heat
  exchanger or pressure reducing orifice are
  installed along in the piping.
• In the bypass flush method, the heat generated by
  the seal flows past the seal face. Hence, the
  operating temperature gets stabilized at the
  temperature of the fluid that is being pumped.
• The bypass flush method is reliable and simple.
  It is cost-effective as well. There is no
  dilution of the product in this method.
• It is a preferred method.

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3 EXTERNAL FLUSH

• It is useful when you want the isolation of the
  seal from the fluid. Here, water is injected into
  the seal gland flush with pressure.  Water flows
  past the seal and mixes with the fluid. TO
  control the flush water flow, lip seal or
  restriction bushing is used. To measure the flow,
  flow meter, gauge, and control valves are used.
• Leak-Pack is ISO 90012008 certified
  company and leading mechanical seals manufacturer
  supplier in India, providing solutions to all
  types of leakages by manufacturing Mechanical
  Seals and Sealing Components as per customers
  drawings, samples or requirements.

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Thanks

• Do you have any questions?
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•  91 7069871592
• https//leakpack.com/

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