Rotary valve Each part variation

Variation of shaft seal

It is possible to specify shaft seal system as follows

Standard

Gland Packing

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  • Standard shaft seal system, Teflon 4 steps standard
  • Shaft seal force can be adjusted by tightening the gland holding bolt

Options

Oil Seal

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  • Use, when fibrous shaft sealant like gland packing cannot be used
  • Arrange seal ring at the innermost part and insert oil seal
  • Oil seal has directional movement in seal performance and direction can be selected according to conditions

Gland Packing + Lantern Ring Purge

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  • When inner pressure of rotary valve is plus pressure, then it is possible to place lantern ring and equip with air purge mechanism
  • It is possible to prevent powder entry in shaft seal by purging with slightly higher pressure than the inside pressure
  • Combined use of lantern ring and gland packing

Oil Seal + Lantern Ring Purge

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  • When inner pressure of rotary valve is plus pressure, then it is possible to place lantern ring and equip with air purge mechanism
  • It is possible to prevent powder entry in shaft seal by purging with slightly higher pressure than the inside pressure
  • Combined use of lantern ring and oil seal

Grease-sealed Lantern Ring

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  • When inner pressure of rotary valve is plus pressure, then it is possible to place lantern ring and equip with grease sealing mechanism
  • Prevention of powder entry in shaft seal by grease sealing
  • Design of grease discharge port below the case of shaft seal

Labyrinth

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  • Design of a gap between labyrinth ring and shaft and prevention of powder entry to shaft due to air purge
  • Specialty is that there is no sliding part in shaft seal

V-ring

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  • Structure to adjust shaft seal pressure by stacking elastic material like Teflon etc. in cross section V shape and compression enables the adjustment

Mechanical Seal

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  • Every manufacturer’s mechanical seal can be used
  • As the shaft structure and size differs depending on the mechanical seal, normally plated stuffing box is used

CIP Cleaning Seal

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  • Shaft seal structure complying to CIP (Cleaning in place)
  • During CIP cleaning, prevention of powder and washing liquid entry in shaft seal by continuous air purge