KOENIG EXPANDER® SERIES SK / SKC 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 / SKC 550

KOENIG EXPANDER® SERIES SK / SKC 550 – OVERVIEW

pull style expander seal
Series SK/SKC 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 / SKC 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 / SKC 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
SKC 550-04044.52.5398.16.54100 / 10001.71
SKC 550-05055.52.80419.57.55100 / 10002.50
SKC 550-06066.53.33811.58.56100 / 5003.50
SKC 550-07077.54.03813.09.57100 / 5005.10
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 / SKC 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.