Valve springs

[weidner]

Tested Spring Co made me a batch of safety springs once . The last of these were stolen from me by a previous TT member many years ago ; yes it still riles me . They can no doubt reproduce , different weights for single and compound . They may have particulars , ref my order , many years ago . Otherwise a drawing is available ex MERL .
The slide valve spring is only there to stop the thing flapping around , I doubt that it much affects performance .