1 What is going on inside a packed stuffing box? How much water is being used? Can you reduce this water usage? Is water getting into the product? How.

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What is going on inside a packed stuffing box?

What is going on inside a packed stuffing box?

•How much water is being used?

•Can you reduce this water usage?

•Is water getting into the product?

•How do solids get into the packing?

•How much water is being used?

•Can you reduce this water usage?

•Is water getting into the product?

•How do solids get into the packing?

HOW A STUFFING BOX SHOULD LOOK WHEN IT IS COMPLETELY PACKED

LANTERN RING MUST BE POSITIONED BELOW FLUSH INLET TO ALLOW MAXIMUM RESULTS FROM FLUSH FLUID: FLUSH PRESSURE SHOULD BE 10 TO 15 PSI (0.8 TO 1 BAR)

OVER MAXIMUM STUFFING BOX PRESSURE.

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Packing needs to compress to work.

Due to the compressibility of the packing the gland force is not effectively transferred through each

packing ring.

Packing needs to compress to work.

Due to the compressibility of the packing the gland force is not effectively transferred through each

packing ring.

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This allows solids from the process fluid being pumped to accumulate between the sleeve and

packing.

This allows solids from the process fluid being pumped to accumulate between the sleeve and

packing.

Conventional flush arrangements are not effective at keeping solids out of packing. This is

a major source of packing and sleeve wear.

Conventional flush arrangements are not effective at keeping solids out of packing. This is

a major source of packing and sleeve wear.

The lack of compression transmitted to the bottom rings Causes them to run “loose”.

The lack of compression transmitted to the bottom rings Causes them to run “loose”.

Bottom of Stuffing Box

Lantern Ring Position

Bottom of Stuffing Box

Sleeve damaged by stock trapped under the bottom packing rings

Sleeve damaged by stock trapped under the bottom packing rings

Flush water must overcome the product pressure to keep the

solids out of the packing.

A pressure drop is occurring between the flush water source and

atmosphere.

The pressure in the stuffing box is less than

80 PSI.

It is easier for the flush water to go to the

atmosphere than it is to remove the solids.

Solids are not effectively removed from the packing

with this method.

Flush water goes to drain.

Flush water must overcome the product pressure to keep the

solids out of the packing.

A pressure drop is occurring between the flush water source and

atmosphere.

The pressure in the stuffing box is less than

80 PSI.

It is easier for the flush water to go to the

atmosphere than it is to remove the solids.

Solids are not effectively removed from the packing

with this method.

Flush water goes to drain.

Open ValveOpen Valve

Process 30 PSI

Process 30 PSI

SolidsSolids

0 PSI0 PSI

80 PSI Flush80 PSI Flush

The flush water must overcome the product

pressure to keep the solids out of the packing.

The pressure drop now occurs between the flush water source, atmosphere

and the product.

The pressure in the stuffing box is now 80 PSI.

The packing must now seal the full 80 PSI.

The packing must be “tight” to control leakage,

causing frictional heat.

This method reduces water use and eliminates some

solids.

Considerable product dilution can occur.

The flush water must overcome the product

pressure to keep the solids out of the packing.

The pressure drop now occurs between the flush water source, atmosphere

and the product.

The pressure in the stuffing box is now 80 PSI.

The packing must now seal the full 80 PSI.

The packing must be “tight” to control leakage,

causing frictional heat.

This method reduces water use and eliminates some

solids.

Considerable product dilution can occur.

Closed Valve

Closed Valve

80 PSI Flush80 PSI Flush

Process 30 PSI

Process 30 PSI

SolidsSolids

0 PSI0 PSI

SpiralTrac: How Does It Work?SpiralTrac: How Does It Work?

Ball valve

Flow meter

CheckValve

GPH

40

20

0

SpiralTrac Type P separator uses centrifugal force to direct the flow of the flush and effectively

prevents solids from entering the packing.

Adjustable flow meter is used to reduce flow rates 20 to 30 gallons per hour!

This arrangement will operate at significantly reduced flush pressures

and flows.

Reduced pressure allows the packing to seal effectively with reduced gland force.

SpiralTrac Type P separator uses centrifugal force to direct the flow of the flush and effectively

prevents solids from entering the packing.

Adjustable flow meter is used to reduce flow rates 20 to 30 gallons per hour!

This arrangement will operate at significantly reduced flush pressures

and flows.

Reduced pressure allows the packing to seal effectively with reduced gland force.

Flow Meter with ValveFlow Meter with Valve

80 PSI80 PSI

SpiralTrac Version “P”SpiralTrac Version “P”

Process 30 PSI

Process 30 PSI

SolidsSolids

FlushFlush

GPH

40

20

0

Flow Meter with ValveFlow Meter with Valve

80 PSI80 PSI

SpiralTrac Ver “P”

SpiralTrac Ver “P”

Process 30 PSI

Process 30 PSI

SolidsSolids

FlushFlush

Reduced Flush Flow and Pressure.

Reduced Flush Flow and Pressure.

No Solids

Reduced Gland Force

Reduced Gland Force

Gland has improved

“adjustment feel” because bolt force

is transmitted through just 3 packing rings.

Gland has improved

“adjustment feel” because bolt force

is transmitted through just 3 packing rings.

Flush Pressure only needs to be slightly above (10-15 psi) process pressure for flow to occur

Flush Pressure only needs to be slightly above (10-15 psi) process pressure for flow to occur

Condition of Shaft Sleeve After Two Years Run Time

Condition of Shaft Sleeve After Two Years Run Time