LY9DTSS

LY9DTSS For a larger view, please mouseover the image.
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Item Description
1 Seal ring with bellows unit
2, 5, 12, 16 O-Ring
3, 14, 20, 21 Set screw
4 Mating ring
11 Seal sleeve
13 Pumping ring
15, 18 Gland plate
17 Retaining ring
19 Drive collar
22 Setting device
23 HSH Cap screw


F Flush
LBO Liquid barrier/buffer OUT
LBI Liquid barrier/buffer IN
  • API 682 Category 2 and 3, Type B, Arrangement 2 and 3 seal
  • Dual seal in face-to-back arrangement
  • Same seal size of inboard and outboard seal
  • Balanced
  • Cartridge unit
  • Rotating metal bellows
  • Shrink fitted seal rings and solid mating rings
  • Compact design
  • Bellows design allows use of balanced seal with plain sleeve
  • Absence of dynamic O-Ring eleminates/reduces seal face hang-up
  • Bellows design minimizes variation in face load due to shaft expansion or face wear
  • Resistant to abrasive particles in the medium, no shaft or sleeve fretting
  • Low heat generation and power consumption due to narrow seal face width
  • Longer seal life
Shaft diameter: d1 = 20 ... 110 mm (0.79" ... 4.33")
Pressure: p = vacuum ... 20 bar (290 PSI)
Temperature: t = -40 °C ... +200 °C (-40 °F ... +392 °F)
Sliding velocity: vg ... 23 m/s (75 ft/s)
Seal rings: Blister resistant carbon
Mating rings:
Silicon carbide SSiC (Q1), RBSiC (Q2)
Bellows: Hastelloy® C-276 (M5),
option: Inconel® 718 (M6)
Secondary seals:
FKM (V), FFKM (K), EPDM (E), NBR (P)
Metal parts: CrNiMo steel 316 (G),
Hastelloy® C-276 (M5)
  • API 682 / ISO 21049
  • API 682 4th ed. Cat. 2/3 - 2CW-CW
  • API 682 4th ed. Cat. 2/3 - 3CW-FB
  • Refining technology
  • Oil and gas industry
  • Petrochemical industry
  • Chemical industry
  • Power plant technology
  • LPG plants
  • API 610 / ISO 13709 pumps
  • Process pumps