Mechanical
seals


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Flowserve 

Input for calculation of
the seal face surface pressure P_{G} 
Sealing pressure dp=p_{1}p_{2, }(1bar
= 0.1 MPa) 
dp = 
MPa 
Balance ratio k=A_{H}/A , (0.65<k<0.9,
balanced k<1) 
k = 

Pressure gradient factor (parallel film k_{1}=0.5) 
k_{1 }= 

Spring load / seal surface A (0.1<p_{f }<0.5) 
p_{f }= 
MPa 
Input for
calculation of leakage, viscous friction and power consumption 
Seal face inner radius 
r_{i} = 
m 
Seal face outer radius 
r_{o} = 
m 
Number of revolutions 
n = 
rpm 
Effective film thickness 
h = 
10^{6} m 
Viscosity 
η = 
Pas 

Surface pressure p_{G}=dp·(kk_{1})+p_{f} 
p_{G
}= 
MPa 
Leakage 
Q = 
liter/hour 
Mean sliding velocity 
v = 
m/s 
Coefficient of friction 
µ = 

Heat generation 
N = 
Watt 