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A piping equipment to change a conical filter in few seconds

ONIS Quick Filters Changer device (QFC) developed by ONIS permit one operator to change in a few decades of seconds a conical strainer without using tools and permits saving equipment integrity, saving production time and the efficiency of the process (quality of filtration and optimal flow).

Save time


No tool

Green design

Pay back

Save time and increase the availability of your facilities with the ONIS QFC

How it works ?

How operate it ?

One cone strainer is on line while the other is on hold outside of the pipe.

As for an ONIS line blind, the gaskets are accessible for checks or change while the process is running.

As soon as the filter is clogged and the loss of flow is noticed, it is compulsory to shut off the upstream and downstream valve and function of the risk analysis to blind the pipe with upstream mechanical line blind. After draining the pipe, one operator will proceed as well as a standard ONIS Line blind: The flange spreading movement is generated by efficient and reliable synchronized eccentric shafts which allows the displacement of the drawer equipped with one or two tubes – strainers holders”.

This quick action clamping mechanism is self-locking and resistant to overpressure and vibration

In less than 1 minute, you perform the change of the perforated strainer without disassembling a pipe spool piece which requires a lot of stuff and staff.

When your process is back in production, the maintenance team has all the time to clean the clogged strainer.

ONIS QFC makes your filter change operation safe, efficient, and profitable.

Why use a QFC ?

Piping cones or flat strainers are used to protect downstream equipment. The purpose of these temporary filters is to avoid damage and clogging of pumps, compressors, boosters, or regulation valves in different applications such as oil, petrochemicals, chemical, steel, power, water, or food industries.

The main cost of perforated cone filters is not their cost themselves, but the shutdown time to disassemble the pipe to extract the dirty cone/flat strainer and to insert a new strainer into the pipe spool piece and tight all the bolts and nuts.

Depending on the size of the pipe and the weight of the strainer, the production time lost and the safety risks can be significant.

The Onis Quick Filter Changer can be equipped with two strainers to proceed to a very quick change or one strainer and one blinding disc to permit the operator to do safe positive isolation of the downstream equipment for maintenance.

Thanks to QFC, the time opening of the pipe is drastically reduced and limit exposure of operators and environmental risks.

Technical specifications

All Onis devices are designed following these specifications:

  • Forged bodies up to 42”
  • Spreading design with no internal mechanism
  • Perfect sealings – 100 % full bore
  • Motorization available
  • Dimensions Flange to Flange is depending on the filter characteristics.

For estimation: please add to standard ONIS Line Blind Flange to Flange to the length of your actual filter with 100 mm added or contact us.


    Frequently Asked Questions

    How is an ONIS device working ?

    A ONIS device is mechanical equipment which permits to one person without any tool to spread the pipe thanks to eccentric shafts in order to permit the sliding movement of the gate equipped or not with accessories.

    What range of products can you supply ?

    We have manufactured equipment from 1’’ to 52’’, up to 420 bars, from -120°C to +650°C Depends on the devices more information on the product page.

    Do ONIS devices are compatible with all types of media ? Gas, fluid, with particles ?

    All types of media have been operated with ONIS devices. Fluids, gas-charged media with particles, etc.

    What is the maintenance needed ?

    Only the 4 seals have to be changed when they are damaged. ONIS’s recommendation is to inject grease in grease fittings at least once a year. Out of that, there is no specific maintenance.

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