SEALS in pumps SEALS in pumps

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2 -MECHANICAL SEALS 2 -MECHANICAL SEALS

PUMPING SEALSPUMPING SEALS

1 -PACKING SEALS 1 -PACKING SEALS

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1 -Packing seals 1 -Packing seals

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Equipment

PACKING WITHOUT SLEEVE

PACKING WITHOUT SLEEVE

• Wear is directly on shaft

GLAND

THROAT BUSH

FOLLOWER

PACKING

LANTERN RING

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Equipment

GLAND

THROAT BUSH

FOLLOWER

PACKING

LANTERN RING

SLEEEVE

PACKING WITHSLEEVE

PACKING WITHSLEEVE

*Wear is on the sleeve

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Horizontal Surface wear Shaft wear

Equipment

Now it is essential to find a solution to avoid shaft wear, Such as finding another surface of another parts to be worn but easy and cheap to be replaced, It is the

MECHANICAL SEAL

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2 -Mechanical Seals 2 -Mechanical Seals

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Equipment

Vertical surface wear Scarifying elements

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Tank

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Tank

Non-sparking material bush

Adjusting nut

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Equipment

Rotary Elements1- Carbon ring

2 -Snap Ring3 -“O” Rings

4 -Springs5 -Sleeve

Stationary Element

Tungsten Carbide ring Or

Silicon Carbide ring

Single mechanical sealSingle mechanical seal

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SINGLE IMPELLER PUMP

MECHANICAL SEAL

HANGED BEAMIMPELLER

HANGED BEAMIMPELLER

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MULTI STAGE PUMP

DRIVE END NON-DRIVE END

IN-BETWEEN TWOBEARINGS IMPELLER

IN-BETWEEN TWOBEARINGS IMPELLER

MECHANICAL SEALS

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Mechanical seal and bearings arrangementMechanical seal and bearings arrangement

oil

EquipmentEquipment

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Mechanical seal

Mechanical seal

Thrust Bearing

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Bellow Type Mechanical SealBellow Type Mechanical Seal

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Bellow Mechanical SealBellow Mechanical Seal

BELLOW

Rotary ring Stationary ring

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Double Mechanical seal Bellow typeDouble Mechanical seal Bellow type

BELLOWBELLOW

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Bellows –Uniform uniform stress distribution

Bellows

– 45° tilt for enhanced

fatigue strength

–Three sweep radius

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Bellows Benefits Bellows Benefits

• For higher pressure

• Generally have light spring loads

–Less heat

–Low power consumption

–Longer seal life

• Pressure balanced by design

• For high temperature applications >260°C/500°F

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Split Type Mechanical SealSplit Type Mechanical Seal

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Split SealsSplit Seals

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Cartridge Split Seal

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Plant OperationsPlant Operations

• Rotating equipment maintenance costs can be about 20 % of the total maintenance budget.

• Rotating equipment is taken out of service 70% of the time due to a leaking Mechanical seal.

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