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How to change a lever weight arm on a Swing Check valve to the opposite side

Having a valve that is able to adapt to surrounding areas and space limitations is an important requirement when selecting a product. In order for the valve to operate, the lever arm needs to have room for sufficient movement and therefore an important feature is that you can change the side of the lever weight arm. This video gives you a step-by-step guide on how to change the side of the lever weight arm on a Swing Check valve.

Video Transcript

Hi my name is Toby from T-T Flow.

Today I am going to talk you through changing the external weighted arm on a T-T Flow Swing Check Valve from the left hand side to the right hand side.

As with any valve maintenance before you start please ensure that you are competent and wearing the correct PPE. You must also ensure that the line is relieved from pressure and preferably any fluid is removed.

To do this you will need a couple of adjustable spanners and allen keys.

Firstly you need to remove the cover. For this we use the spanner to release all of the bolts.

Once the bolts have been taken out just place these to the side for later.

Once all the bolts have been removed the cover should easily lift off exposing the gasket which is on the top here.

Now we will look to remove the lever arm, by using a small spanner to remove the nut here at the end of the shaft, which will release a nut, spring washer and a penny washer.

The lever weight arm should now just pull off nice and easily.

With the cover removed we can look into the top. Next we need to loosen the locking screw, by simply releasing it with a few turns.

We then need to take the bush nuts off from both sides by loosening them with the spanner, which should easily come off.

The standard nut is the one with a blind hole and the lever weight nut is the one with the through hole.

Once both nuts are off we simply pull the shaft out, rotate the shaft and push it back in. Once it is in place we need to reassemble the nuts on both sides. The blind hole now goes in the left side and the through hole nut goes on the right hand side. Screwing them both in all the way. Please bear in mind that there are two internal O-rings which should be lubricated and care taken not to cut them whilst assembling the nut on the shaft.

Tighten the through hole nut with the spanner and then affix your lever weight. We then reapply the penny washer, spring washer and nut. Finally, tighten up ensuring that in the state of no flow the lever arm hangs just below the horizontal.

I hope this has helped and provided you with a useful guide to changing the side of a lever weight on a Swing Check Valve. If you need any further information, please don’t hesitate to call us on 01630 647200 or view our range online using the link below.

T-T Swing Check Valve Range

The swing check valve is used in potable, wastewater and sewage applications to prevent reverse flow. To find out more about the range, including our same day dispatch products and technical data, use the link below.

  1. Swing Check Valve
    Swing check valve, DN50-DN300, PN16, EN558-2-S10

    Starting from £92.00