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Sealing technology

SEALING PLUG

High-performance, low-cost: Blind SEALING PLUGs close drill holes efficiently and permanently.

SEALING PLUG – Ball sealing plugs of the Series 11

For leak-tight drill holes

Use SEALING PLUGs to control and regulate flows

In many applications, hydraulic or gaseous media flows through channels and drill holes. The SEALING PLUG reliably closes and seals drill holes and withstands operating pressures both in the low-pressure range and high-pressure range up to 500 bar.

Plus factors

Advantages SEALING PLUG

  • Easy installation

    Fixed parameters enable easy, controlled and reproducible installation that guarantees reliable performance even under high pressure.

  • Application-oriented

    SEALING PLUG offers the right solution for all applications – for example hand-operated setting tools, pneumatic setting tools and automated systems.

  • Cost-efficient

    When you use SEALING PLUG, there is no need to cut thread or use additional sealants. The hydraulic sealing plug is extremely cost-effective.

Method and principle

Reliable closure and sealing system for drill holes

The SEALING PLUG is a two-piece, all-metal part that functions in accordance with the push-pull expansion principle. The SEALING PLUG with ball functions in accordance with the push-expansion principle. In this case you press the ball into the sleeve, so that the sleeve expands. The blind plug with mandrel functions in accordance with the pull-expansion principle. In this case you pull the mandrel into the sleeve. Both closure elements feature serrations on the outside of the sleeve that anchor the SEALING PLUG in the installation material as the sleeve expands.

The PULLPLUG™ is also the result of continuous product development. The closure with pin is based on the pull-expansion principle and offers many advantages. It is made with less material and thus is very cost-effective. In addition, the PULLPLUG™ does not have a mandrel.
For some of the elements we offer tools and devices from the Böllhoff processing technology range.

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Find the right solution for your application

SEALING PLUG product types

  • SEALING PLUG with ball – Series 11

    Principle

    • Push-expansion principle
    • Operating pressure up to 350 bar

    Diameter

    • 3 mm to 22 mm

    Versions

    • Sleeve of case-hardened steel, galvanized (Cr(VI)-free)
    • Ball of roller bearing steel, burnished
  • SEALING PLUG with ball – Series 31

    Principle

    • Push-expansion principle
    • Operating pressure up to 450 bar

    Diameter

    • 3 mm to 22 mm

    Versions

    • Sleeve of stainless steel, AISI 300
    • Ball of roller bearing steel, burnished
  • SEALING PLUG with ball – Series 33

    Principle

    • Push-expansion principle
    • Operating pressure up to 450 bar

    Diameter

    • 3 mm to 22 mm

    Versions

    • Sleeve of stainless steel, AISI 300
    • Ball of stainless steel, AISI 300
  • SEALING PLUG with mandrel – Series RS

    Principle

    • Pull-expansion principle
    • Operating pressure up to 500 bar

    Diameter

    • 3 mm to 9 mm

    Versions

    • Sleeve of case-hardened steel, burnished
    • Ball of Q&T steel, burnished
  • PULLPLUG™ – Series RST

    Principle

    • Pull-expansion principle
    • Operating pressure up to 500 bar

    Diameter

    • 5 mm to 22 mm

    Versions

    • Sleeve of case-hardened steel, burnished
    • Ball of Q&T steel, burnished
    • Pin of Q&T steel, burnished

    Advantages

    • Low price due to less material
    • No noise when breaking off a mandrel
    • The need to dispose of the broken off mandrel is dispensed with
    • No bare break point after breaking off the mandrel
    • Reliable process, controlled via path not target breaking force
    • Particularly advantageous for harder installation materials
    • Additional benefit: Thread insert
  • PULLPLUG™ – Series LRST

    Principle

    • Pull-expansion principle
    • Operating pressure up to 60 bar

    Diameter

    • 5 mm to 22 mm

    Versions

     

    • Steel
    • Aluminium
    • Stainless steel
    • Other versions on request

     

     

    Advantages

     

    • Low price due to less material
    • No noise when breaking off a mandrel
    • No need to dispose of the broken off mandrel
    • No bare break point after breaking off the mandrel
    • Reliable process, controlled via path not target breaking force
    • Particularly advantageous for harder installation materials
    • Additional benefit: Thread insert

     

  • B-Blocker™ – Series BB

    Principle

    • Push-expansion principle
    • Operating pressure up to 35 bar

    Diameter

    • 5 mm to 22 mm

    Versions

    • One-piece aluminium element

    Advantages

    • Low price due to less material
    • Can be directly installed in cast chamfers
    • Minimal pretreatment of the mandrel
    • No bare break point after breaking off the mandrel
    • Reliable process, controlled via path not target breaking force

Information and more

Downloads

Interested in the SEALING PLUG? You can download further information here.

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