VEGA VEGADIF 65 Chemical seal CSS - Manual (Page 7)

ΔT Process temperature-Reference temperature chemical seal
= 100 °C - 20 °C = 80 K
TK
Capillaries
= 0.3 mbar/(10K•1 m)
ΔT Ambient temperature-Reference temperature capillaries = 60 °C -
20 °C = 40 K
Error calculation
Δp
chemical seal
= (0.4 mbar/10K) • 80K = 3.2 mbar
Corrective factor diaphragm material = 4.8 mbar • 1.5 = 7.2 mbar
Δp
Capillaries
= (0.3 mbar/10K•1 m) • 40K•4 m = 4.8 mbar
Δp
Total
= 7.2 mbar + 4.8 mbar = 12 mbar
With one-side chemical seals, the total temperature influence is
12 mbar
Chemical seal CSS • for VEGADIF 65 7
3 Planning instructions for isolating systems
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