Dear Habib,

I have re-analysed your line and evaluted nozzle for two design i.e.your design and my design.

I have made following changes...

1)Spring was about 3 times over designed
Your spring-Cold load=133388N/spring rate=2189 N/mm
My Spring- Cold load=56000N/Spring rate=701 N/mm

2)Bottom spring modelling was not correcct.

Compare results and have your say.

Regards,
Aslam