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In focus: Line stopping equipment - 14 - 20" Line stop actuator

In a new feature for the Mirage blog we'll be taking an in-depth look at a specific portable machine tool. This week we take a look at the Line stop actuator 14 - 20" that is used to temporarily isolate pipeline sections.

14 - 20" Line stop actuator


A line stop hydraulic actuator are used to temporarily isolate a section of pipeline for repairs or maintenance without the need to shutdown the whole line.

The Mirage LSA range is designed for ease of use in making 14-20" line stops in conjunction with the required line stop head and housings into various material pipelines with varying wall thicknesses.

The hydraulically operated cylinder with control bar gives the user a direct measurement reading for distance control and double lock for security. The line stopping equipment also comes with a industry standard connection flange adapter for existing assets.

This Mirage LSA4-12 has a valve bank positioned at the lower end of the cylinder for ease of operation.

Technical Specs.

Here's a look at some of the key technical specifications of the actuator.


  • Minimum line stop diameter: 14" (355mm)
  • Maximum line stop diameter: 20" (508mm)
  • Boring bar travel: 102" (2591mm)

Pressure and temperature

  • Maximum operating pressure: 102 bar (1480 p.s.i)
  • Maximum operating temperature (continuous): 83 deg C (181 deg F)

Hydraulic power unit

  • Diesel engine: 35kw (47hp)
  • Maximum pump delivery: 0-80 lpm (0-21 gpm)
  • Diesel fuel tank capacity: 25 litres (5.5 gallons)
  • Hydraulic oil capacity: 29.5 litres (6.5 imp gallons)

Unsure whether this is the right line stop equipment for your requirement? Take a look at our line stopping guide.

Standard line stop housings

All line stop housings parts meet industry standards of ASME Classes 150, 300 or 600. Depending upon the nominal size required, depends upon the part you require. We cater for nominal sizes from 14-20 In (100-250 DN).

Also supplied with the housings are line stop heads that meet folding head class 600 or sealing element class 600. From 14-20 In (100-250 DN), there are a plethora of parts to meet your needs.

Also included...

The machine is supplied complete with the actuator, hydraulic valve and pressure relief as well as a control bar protector, pressure test end cap, lifting bracket, connection hoses and all required mounting studs and nuts. Also included are:

  • #600 connection spool
  • CE certificate
  • Packing list and manual
  • Pressure certificate for working pressure - 1480 psi (102 bar)

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