TRV Travel

[bert]

Just checking one out. I've taken the top off. What sort of travel should I expect on the pin? I push it down and it comes back up.

[Dave Liquorice]

Somewhere around 3/16" +/- 1/16".

[Harry Bloomfield]

bert pretended :

That's what it's supposed to do. If the pump is running at the time, you might feel or hear the flow stop too as it is pushed in.

[alan_m]

And it should come up. It's the mechanism in the bit that has been taken off that pushes down the pin.

[John Rumm]

3 - 5mm ish

[bert]

It does. Does that mean it is normally open?

[bert]

It's not a lot is it, from full open to full closed.

[Dave Liquorice]

Area of 15 mm dia circle about 175 mm^2 Area of 5 mm of 15 mm dia cylinder about 235 mm^2

The two areas are roughly equal with 3.7 mm of cylinder.