• Can be used with fluids or gases
  • Stainless steel design is standard
  • Orifices can be calculated to achieve desired flow rates
  • Expansion style easily installs into drilled holes and is tamper resistant



forward flow restrictor
Series RE flow restrictor

The KOENIG RESTRICTOR® Series RE is designed to restrict flow in fluid systems and is available in a variety of orifice sizes. These flow restrictors are tamper resistant and provide proven performance even in high-vibration applications, with a maximum working pressure of 210 bar (3045 psi) depending on the base material and part size. Series RE restrictors securely install into drilled holes with fast and easy installation, effectively controlling the flow of both fluids and gasses.

With complete design-in engineering support, and global expertise in a variety of sealing and flow control applications, SFC KOENIG is ready to assist with your orifice flow restrictor needs. To assist with part selection, we have developed a Flow Rate Calculator and an Orifice Size Calculator that can help identify which Series RE orifice restrictor fits your application requirements, or use our Product Selector to identify the best KOENIG RESTICTOR part for your specifications.

Click on the flow restrictor Part Number below for complete part specifications.

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Product SpecificationsPressure Performance3D CADTechnical DownloadsVideo
Part Numberd1l1[l2 ] ~ Ref.0
Orifice Diameter
l3 min.d3
[s] ~ Ref.x
RE-040-XXX4. – / 1000
RE-050-XXX5. – 1.915. / 1000
RE-060-XXX6. – 2.546. / 1000
RE-070-XXX7.07.511.60.40 – 3.307. / 1000
RE-080-XXX8.08.513.30.40 – 3.818. / 1000
RE-090-XXX9. – 4.329. / 1000
RE-100-XXX10. – 4.9510.

Dimensions in millimeters

Series RE mmBase Material of the Installation
High Strength Steel
ETG-100 / 44SMn28
AISI 1144
Ductile Cast Iron (Dura-Bar®)
EN 1563: GJS-450-10
ASTM A536: 65-45-12
AICu4Mg1 / EN AW-2024-T3
AA: 2024 T4/T6*
Cast Aluminum-Alloy
G-AISi7Mg / EN-AC-42100
Ø 4120 bar / 1740 psi100 bar / 1450 psi
Ø 5180 bar / 2610 psi150 bar / 2175 psi
Ø 6210 bar / 3045 psi150 bar / 2175 psi
Ø 7 – 8210 bar / 3045 psi180 bar / 2610 psi
Ø 9 – 10Please Contact Us for Details
Max. Allowable Working Pressure = Nominal Pressure
*SFC KOENIG’s North American Engineering Department utilizes 2024-T4/T6 as a test base material.
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