SHR,
Try to stick to your story. Above you said and I quote ...
"In my openion spring movement will be constant irrespective of pressure variation when Bourdon effect & pressure elongation on bend both are switched off."
I said you are wrong, spring MOVEMENT may be affected by pressure.
Now you are talking about spring LOAD.
You are WRONG about spring MOVEMENT. I agree that spring LOAD may not change (assuming it's a constant spring).