-->//(Design against Static Load) Example 4.15
 
-->//Refer Fig.4.50 on page 121
 
-->//Safety valve blow-off pressure p (MPa)
 
-->p = 1.5
 p  =
 
    1.5  
 
-->//Effective diameter of the valve opening d (mm)
 
-->de = 50
 de  =
 
    50.  
 
-->//Distance between fulcrum and lever dead weights l1 (mm)
 
-->l1 = 1000
 l1  =
 
    1000.  
 
-->//Distance between the fulcrum and the pin connecting the valve spindle to the lever l2 (mm)
 
-->l2 = 100
 l2  =
 
    100.  
 
-->//Tensile yield strength of 30C8 Syt (N/mm2)
 
-->Syt = 400
 Syt  =
 
    400.  
 
-->//Factor of safety fs
 
-->fs = 5
 fs  =
 
    5.  
 
-->//Permissible bearing pressure at the pin in the lever Bp (N/mm2)
 
-->Bp = 25
 Bp  =
 
    25.  
 
-->//Ratio of width to thickness ratio 
 
-->ratio = 3
 ratio  =
 
    3.  
 
 

The diamater of the pin(dp) = 11.000000 mm

The length of the pin(lp) = 20.000000 mm

The thickness of the lever cross-section(b) = 15.000000 mm

The width of the lever cross-sectio(d) = 45.000000 mm

The dead weight(P) = 294.524311 mm

The lever design is safe