Graham_Wright
Well-Known Member
Any recommendations please for sealing parallel threads on sea valves and the likes?
PTFE will only work on the tapered variety.
PTFE will only work on the tapered variety.
Thread sealing.
- Thread starter Graham_Wright
- Start date
eyehavit
Well-Known Member
Sikaflex or silicone if you need to remove later. Epoxy if permanent.
Malish
Well-Known Member
Hylomar 5059 liquid thread sealant should be suitable - see Hylomar web site for specification and, for example, asap supplies for the price (about £15)
Poignard
Well-Known Member
ROCOL X15-72 Pipeseal Liquid.
See www. rocolshop.com
See www. rocolshop.com
bigmart
Well-Known Member
Permabond offer a range of Pipe Sealers & Thread Lockers.
Martin
Martin
impact30
Well-Known Member
Recently removed 1.5" gate valves mated to skin fittings with 'foliac' and while seal seemed good it was very difficult to remove even with heat. I am considering using 'bosswhite' or similar when re-fitting ball valves but had been thinking of seeking advice.
andy_wilson
Well-Known Member
No, not for threads.
andy_wilson
Well-Known Member
PTFE is OK for parallel threads, and works fine on (all my) underwater fittings.
Do the usual 2-3 wraps and do a trial assembly to see if it is reasonably tight when you reach the orientation you desire.
If not, adjust the number of wraps to acheive the desired effect.
Do the usual 2-3 wraps and do a trial assembly to see if it is reasonably tight when you reach the orientation you desire.
If not, adjust the number of wraps to acheive the desired effect.
graham
Well-Known Member
if the threads are a bit slack get some plumbers hemp and boss white.
Smear the threads with boss white then tightly wind strands of the hemp into the roots of the threads . Start by almost filling the threads on the male part with hemp strands.
wind on clockwise so screwing the parts together tightens the strands in the threads.
Bit messy but very watertight and will not become loose.
if the threads are very slack you can get a backing nut (Plumbers/pipe suppliers) to wind back against the face of the fitting with bosswhite and hemp forming a seal in between.
Smear the threads with boss white then tightly wind strands of the hemp into the roots of the threads . Start by almost filling the threads on the male part with hemp strands.
wind on clockwise so screwing the parts together tightens the strands in the threads.
Bit messy but very watertight and will not become loose.
if the threads are very slack you can get a backing nut (Plumbers/pipe suppliers) to wind back against the face of the fitting with bosswhite and hemp forming a seal in between.
philip_stevens
Well-Known Member
Loctite Thread Sealant 577
I know it works, as I used it on my calorifier heater coils connections from the engine and Eberspacher, and the fuel gauge connections from the fuel tank, that I fitted last winter.
I know it works, as I used it on my calorifier heater coils connections from the engine and Eberspacher, and the fuel gauge connections from the fuel tank, that I fitted last winter.
