HR
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HR

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HR
HR
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Technical drawing of HR

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Item Part no.DIN 24250 Description
1.1 472 Seal face
1.2 520 Sleeve
2 412.1 O-Ring
3 474 Thrust ring
4 477 Spring
5 475 Seat (G11)
6 412.2 O-Ring
7 412.3 O-Ring
8 441 Housing

Direction of installation: - from the impeller side HR10 - from the bearing side HR11

HR

PDF data sheet

Features

  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Multiple springs stationary
  • Seat rotating
  • Seat arranged directly behind the impeller
  • Spring protection sleeve
  • Variant with cylindrical spring and acc. EN 12756 (HRZ1) available
  • Variant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3)
  • Dual seal as cartridge unit (HRKS-D) available

Advantages

  • Especially for application in solids containing media without external flush or internal product circulation. Solids content 40 % (single seal) and 60 % (double seal)
  • Operation under vacuum without seat locking possible
  • Pumping screw for increased circulation available
  • Springs are protected from product and leakage

Operating range

Shaft diameter:
dN = 36 ... 270 mm (1.4" ... 10.63")
Pressure: p1* = 16 bar (230 PSI)
Temperature:
t = -20 °C ... +160 °C (-4 °F ... +320 °F)
Sliding velocity: vg = 10 m/s (33 ft/s)

* For operation under vacuum it is necessary to arrange for quenching on the atmosphere side.

Materials

Seal face: Silicon carbide (Q1, Q2)
Seat: Silicon carbide (Q1, Q2)

Standards and approvals

  • EN 12756

Recommended applications

  • Contaminated, abrasive and solids containing media
  • Process industry
  • Oil and gas industry
  • Refining technology
  • Chemical industry
  • Power plant technology
  • Pulp and paper industry
  • Water and waste water technology
  • Mining industry
  • Sugar industry
  • Cement industry
  • Lithium
  • Sewage water pumps
  • Dredger pumps
  • Oil sand extraction
  • Suspension pumps of flue-gas desulphurization plants (FGD)

Notes

Direction of installation:

  • From the impeller side: HR10
  • From the bearing side: HR11

Product variants

https://media-assets.eagleburgmann.com/image/108134910297/image_bqj84se3s13i9dfbi9p1dkhd0n/-FWEBP

HR2
Cartridge-type single seal with guide sleeve (Item no. 2) for use with quench. Insert (Item no. 1) either metal or silicon carbide.

https://media-assets.eagleburgmann.com/image/108134910297/image_d0q61vfhdd2hd1vfbdenkpmd6i/-FWEBP

HRKS-D
Double seal in cartridge design for operation in barrier or buffer pressure (does not open if barrier pressure fails), available alternatively with a pumping screw for a higher rate of circulation. Torque transmission e.g. by shrink disk.

https://media-assets.eagleburgmann.com/image/108134910297/image_mvsm0uckjp3bn3n6i4inpqnj00/-FWEBP

HRZ1
Single seal with cylindrical spring and type G76 seat. For installation in covers with installation dimensions according to EN 12756 B or U. Installation length l11 corresponds to max. l1k. Intermediate sizes on request.

https://media-assets.eagleburgmann.com/image/108134910297/image_kchcmiukpl015cab1nk0jbhv5g/-FWEBP

HR3
Cartridge-type single seal. Insert (Item no. 1) either metal or silicon carbide. Optional without maintenance rinsing.

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