H75A4-T

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H75A4-T

H75A4-T
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Item Description
1.1.1, 2.1.1 Seal ring
1.1.2, 2.1.2 Driver
1.1.3, 2.1.3 Thrust ring
1.1.4, 1.3, 2.1.4, 2.3 O-Ring
1.1.5, 2.1.5 Spring
1.1.6, 12 Set screw
1.2, 2.2 Mating ring
3 Seal sleeve
4 Gland plate
5 Key
6 Adapter ring
7 Throttle ring
8 Adapter
9 Setting device
10 Hexagon bolt
11 Set ring


F Flush
LBO Liquid buffer/barrier OUT
Q Quench
LBI Liquid buffer/barrier IN
D Drain

H75A4-T

Features

  • API 682 Category 2 and 3, Type A, Arrangement 2 and 3 seal
  • Dual seal in face-to-back arrangement
  • Balanced
  • Cartridge unit
  • Rotating multiple springs
  • Integrated pumping device
  • Suitable for pressure reversals
  • Replaces the H75VK seal

Advantages

  • Universally applicable both for retrofits or original equipment
  • Efficient stock keeping due to standardized components
  • Extended selection of materials
  • Extended field of operation in terms of temperature and pressure
  • Optimized torque transmission
  • Metal parts also in special materials available

Operating range

Shaft diameter:
d1 = 20 … 110 mm (0,79" … 4,33")
Pressure: p1 = ... 42 bar (609 PSI)
Temperature:
t = -40 °C … +176 °C (-40 °F … +349 °F)*
Sliding velocity: vg = 23 m/s (76 ft/s)
Axial movement:
d <50 mm ±1,0 mm
d ≥50 mm ±1,5 mm

* Engineered up to 260 °C (500 °F) with FFKM (K) secondary seals

Materials

Seal rings: Blister resistant carbon,
Silicon carbide SSiC (Q1), RBSiC (Q2)
Mating rings:
Silicon carbide SSiC (Q1), RBSiC (Q2)
Secondary seals:
EPDM (E), NBR (P), FKM (V), FFKM (K)
Springs: Hastelloy® C-276 (M5)
Metal parts: CrNiMo steel 316 (G) or equivalent, optional materials on request.

Standards and approvals

  • API 682 / ISO 21049
  • API 682 4th ed. Cat. 2/3 - 2CW-CW
  • API 682 4th ed. Cat. 2/3 - 3CW-FB
  • Compliant to TA Luft (German Clean Air Act)

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