Fitting Fire Valve

beveldrive · 20 Jan 2018

I'm fitting a new capillary fire valve. It has 1/4" bsp threads at the inlet and outlet for the oil connections. Do I need to use ptfe tape when screwing in the connectors?

John D v2.0 · 20 Jan 2018

If it's a tapered threaded connection then yes, if it's a union then no you'll need a fibre washer suitable for the system.
That would be correct for water or gas, but for oil the may be different rules.

beveldrive · 20 Jan 2018

It's a 10mm x 1/4" coupler but yes the fire valve has tapered threads. So looks like use ptfe tape.

leakydave · 20 Jan 2018

I use Heldite jointing paste too, as recommended by OFTEC.

beveldrive · 20 Jan 2018

Ok thanks, I'll get some.

oilboffin · 20 Jan 2018

I love heldite used it for years when using it I put some on the threads first then wrap the ptfe on then I put heldite on top of the tape then screw up.Bob

oilhead · 21 Jan 2018

oilboffin said:
I love heldite used it for years when using it I put some on the threads first then wrap the ptfe on then I put heldite on top of the tape then screw up.Bob

And then spend 2 hours getting it off your fingers. I also use 'belt and braces', but put the PTFE onn dry, then brush the Heldite. It helps to let the Heldite 'cure' a little say 15 mins to get a good seal without losing lots of the sealer when tightening up.

oilboffin · 21 Jan 2018

You dont get messy if youre careful and after 40 years I'm careful.Bob

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Fitting Fire Valve

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