KOENIG EXPANDER® SERIES SK 550

  • Sealing plugs for operating pressures up to 500 bar / 7200 psi
  • Short installation length
  • Liberal manufacturing tolerance 0 / + 0.12mm
  • Extended mandrel for deeper setting

KOENIG EXPANDER® SERIES SK 550

KOENIG EXPANDER® SERIES SK 550 – OVERVIEW

pull style expander seal
Series SK 550 expander plug

Pull-style expander seals use an integrated mandrel to insert the expander plug into a drilled hole. The KOENIG EXPANDER® Series SK 550 plug does not require the hole to be counter-bored, and is often used for angled channels or installations with difficult orientations. They are ideal for installations with space or weight constraints. If you are unsure if the SK 550 expander sealing plug series is the right component for your application, use our Product Selector to identify the best KOENIG EXPANDER part for your specifications.

Material:

Sleeve: Case Hardening Steel, Gun Metal-Finish    Mandrel: Heat Treatable Steel, Special Oil Film Lubrication

Product SpecificationsPressure PerformanceTechnical DownloadsVideo
Product Numberd1l1d2l2l3 max.L4 Max. (BO)d3 +0.12 / -0Packaging UnitWeight in gram/pcs.3D CAD
SK 550-04044.52.53996.54100 / 10001.71
SK 550-05055.5341107.55100 / 10002.68
SK 550-06066.53.4431286100 / 5003.61
SK 550-07077.54.1381497100 / 5004.98
SK 550-08088.54.2401510.58100 / 5006.33
SK 550-09099.54.54317119100 / 2508.23
SK 550-1001010.54.75451912.510100 / 25010.57
SK 550-1201212.55.7502416.51250 / 25016.77

Dimensions in millimeters”

Series
SK 550
mm
Base Material of the Installation
High Strength Steel
ETG-100 / 44SMn28
AISI 11441
Case Hardened Steel
C15Pb / 1.0403
AISI 10L15
Ductile Cast Iron
EN 1563: GJS-600-3
ASTM A536: 80-60-03
Gray Cast Iron
EN 1561: GJL-250
ASTM A48: NO.35
Aluminum-Alloy
AICu4Mg1 / EN AW-2024-T3
AA: 2024 T4/T6*
Aluminum-Alloy
AIMgSiPb / EN AW-6012-T6
AA: 6012-T6
Cast Aluminum-Alloy
G-AISi7Mg / EN-AC-42100
ASTM/UNS: A356
Ø 4 – 101600 bar / 23200 psi
   500 bar / 7200 psi
1400 bar / 20300 psi
   450 bar / 6500 psi
Ø 121600 bar / 23200 psi
   400 bar / 5800 psi
Proof Pressure Test B
Max. allowable Working Pressure = Nominal Pressure
*SFC KOENIG’s North American Engineering Department utilizes 2024-T4/T6 as a test base material.

Operation

Technical Information

Design Support

Our expertise is at your service. Speak to our engineers for complete design-in support of our sealing and flow control solutions.

Installation Equipment

SFC KOENIG offers a complete line of installation equipment including hydropneumatic systems, handheld tools and setting components.