Archive for The Unofficial Mamod and Other Steam Forum The Original Unofficial Toy Steam Forum
Established 2006
The biggest, most popular steam forum around! Accept NO imitations!
We have a growing community of regular posting members who chat about all aspects of toy and model steam.
 


       The Unofficial Mamod and Other Steam Forum Forum Index -> Locomotives
CCairns

IP Engineering Replacement Safety Valve Instructions

I've been cleaning out my steam engine store and came across these instructions for the IP Engineering Replacement Safety Valve.

May be of interest to some of our members.



I'll leave Admin/Moderators to decide if this should be placed in 'Steam Reference Library'.

Thanks for looking.
Graham-Jilly

I never got those instructions with mine    thanks for postin Chris
CCairns

What they do not tell you in the instructions is that it is possible to adjust the setting of this valve.

Use a pair of needle pliers or similar and rotate the plate with the 4 vents holes in the desired direction to increase or decrease pressure - this adjusts the tension on the spring.
bessytractor

hmmm


pretty straightforward  
Graham-Jilly

yep already discovered that on mate    
that plate screws right out so you can easily service the valve.
steamyjim

Never new that.... THANKS!
Graham-Jilly

also remember as you increase pressure you increase boiling temerature so dont bump it too high as you can melt the thin siteglass on the mamod trains  
steamyjim

No your not increasing the boiling temperature. Just increasing the time the water has to boil and turn to steam before it is released
Mamodman123

Ive NEVER adjusted my safety valve wonder what its actually set at  
CCairns

I'm planning on making a syphon tube for the Mamod type pressure gauge that was fitted to my SP6, and then trying it out on my other Mamods. It seems to over-read when used with the straight through adaptor at present. Just waiting for my safety valve from Antics Online to arrive (no delivery date at present).
steamyjim

Sorry for the dealy with the pics of the syphon on my loco Chris. Havent been able to get up to me grandads for a while
Graham-Jilly

steamyjim wrote:
No your not increasing the boiling temperature. Just increasing the time the water has to boil and turn to steam before it is released

Jim it is physics mate Atmospheric pressure influences the boiling point of water. When atmospheric pressure increases, the boiling point becomes higher, and when atmospheric pressure decreases (as it does when elevation increases), the boiling point becomes lower.
bessytractor

Graham-Jilly wrote:
steamyjim wrote:
No your not increasing the boiling temperature. Just increasing the time the water has to boil and turn to steam before it is released

Jim it is physics mate Atmospheric pressure influences the boiling point of water. When atmospheric pressure increases, the boiling point becomes higher, and when atmospheric pressure decreases (as it does when elevation increases), the boiling point becomes lower.


I'm not fussed as long as the engine makes steam  

learnt something new today  
Les Marsh

bessytractor wrote:
Graham-Jilly wrote:
steamyjim wrote:
No your not increasing the boiling temperature. Just increasing the time the water has to boil and turn to steam before it is released

Jim it is physics mate Atmospheric pressure influences the boiling point of water. When atmospheric pressure increases, the boiling point becomes higher, and when atmospheric pressure decreases (as it does when elevation increases), the boiling point becomes lower.


I'm not fussed as long as the engine makes steam  

learnt something new today  


Seems a bit too technical for me.

As Graham-Jilly wrote: as long as it makes steam - I agree with that.
       The Unofficial Mamod and Other Steam Forum Forum Index -> Locomotives
Page 1 of 1