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Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer CALIBRATION CYLINDERS
for SPLIT PHASE STANDARDS
Analyzers dedicated to split phases samples such as Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer in gasoline or LPG require accurate calibration and standard integrity is the main purpose of this operation .
For Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer calibration main difficulty is due to the coexistence between gaseous and liquid phases in equilibrium in the container when the boiling point of different fractions is different .
The quantity of worldwide implementations in the oil refinery and petrochemical industries established the superiority of piston cylinders over the nitrogen sky tank , the siphon cylinders and the membrane accumulators for Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer calibration.
The calibration cylinder “SPC ISOSAMPLE.” features a floating piston separating the standard from the fluid motor . This is a patented double seals and bleed device to prevent any source of leak and keep standard integrity .
If required, the inter-seals chamber can be pressurized with a neutral gas such as Nitrogen or Helium for Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer calibration
Other features are a level indicator / transmitter EExi for remote monitoring of calibration standard contained , a low level trip alarm EExd and a stirring device to prevent stratification and keep standard homogeneity .
The stirring device is operated by pneumatic / magnetic stirrer for fluid viscosity under 20 cpo and ex-proof motorized stirrer up to 5 000 cpo .
All wetted parts are in S.S. 316L with PTFE seals and when required a conformity passport with the European Pressure Equipment Directive PED 97/23/CE is supplied with integrated relief valves LLOYD’S REGISTER certified .
The calibration standard for Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer calibration is usually fed from process line and the air or inert gas pressure on upper chamber must exceed the vapor pressure of this standard for the maximum expectable ambient temperature .
Once the cylinder has been fed , a sample for laboratory is taken off from an integrated septum for syringe , at the end of this operation the calibration standard is characterized for Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer calibration.
When required , material can be supplied with sampling system integrated on free standing frame or in cabinet to consolidate the Sulfur / Distillation / Vapor Pressure / Flash Point / Octane Index / Chromatograph analyzer conditioning system .
Specific components such as integrated double block& bleed pneumatic valves are provided for auto-cal to prevent cross contamination and eliminate dead volumes .
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