DuraSite 500(1) Portable Sample Vessel User's Guide

1 DuraSite 500(1) Portable Sample Vessel User's GuideVersion 11142003(1) = 90 Duro Wetted O-Rings2 Table Of Contents1. Introduction32. About this Manual33. Contacting YZ Systems34. Vessel Components45. Specifications56. Application67. Theory of Operation78. DuraSite Installation & Use89. Cylinder Maintenance 1010. DiagramsDuraSite Portable Sample Vessel 12DS-500(1) Version 11142003YZ Systems, Inc. 3101 Pollok Drive Conroe, Texas USA 77303 P: F: Introduction:Congratulations on your purchase of the DuraSitePortable Sample Vessel . You've made a wisemeasurement investment for your you begin installation, insure that all of thenecessary components are present.

2 TFE tape,Stainless Steel Tubing, and Tubing Fittings may About This Manual:This User's Guide provides a step-by-step descrip-tion of the information you need to operate theDuraSite Portable Sample Contacting YZ Systems, Inc.:If the answer to your question can not be foundwithin this manual please contact YZ Systems When calling please have on handthis manual for potential review. Also be prepared toprovide the following: The model and serial number of the DuraSitePortable Sample Vessel . The model and serialnumber are printed on the Pre-Charge head of thesample Vessel . This manual and its version number, listed on thefront cover. A description of the difficultly and the activity at thetime of Vessel Components:The primary components of the DuraSite PortableSample Vessel are illustrated Inlet(1/4" NPT)Precharge Inlet(1/4" NPT) " " " " "Pre-Charge HeadYZ UniValveRupture DiscCylinderPurge ValveMixing BallYZ UniValveProduct Head-Isolation ValvePrecharge HeadIndicatorMagnetic VolumePistonOverall LengthsGaugeProduct HeadIsolation ValveOverall Length "DS-500(1) Version 11142003YZ Systems, Inc.

3 3101 Pollok Drive Conroe, Texas USA 77303 P: F: Specifications:Working Pressure:1800 psi*Tested Pressure:3000 psi*Visual Level Indication:MagneticPrimary Materials:316 Stainless Steel and AluminumCarrying Case:OptionalTotal Volume:*500cc*Manufactured under DOT exemption #DOT-E 875766. Application:Accurate sampling of natural gas and liquid hydrocar-bons equates to revenue, and in many cases a largeamount of revenue. One of the major links in thesampling process is the Sample container or recent years, the Constant Pressure Cylinder hasbecome the storage cylinder of choice, principally dueto it's unique design.

4 This type cylinder allows thesampled product to be stored at a constant pressurethroughout the Sample period and in final lab DuraSite Portable Sample Vessel permits theuser to remove a liquid or gas hydrocarbon samplefrom a pipeline or a sampling device. This is accom-plished without changing the pressure of the productor exposing it to a contaminant fluid. If properly usedand maintained the DuraSite will provide many yearsof safe, accurate and clean DuraSite is a very safe device to use. As with anyequipment dealing with flammable products, it ismandatory that a good, thorough operator trainingprocedure be established prior to (1) Version 11142003YZ Systems, Inc. 3101 Pollok Drive Conroe, Texas USA 77303 P: F: Theory of Operation:The DuraSite PortableSample VesselThe DuraSite Portable Sample Vessel consists ofa metal cylinder precisely machined and polishedon the inside surface with removable end headsfor easy access to the inside of the cylinder.

5 Theheads are drilled and tapped to incorporate isola-tion valves, gauges, and pressure rupture inside of the cylinder is a moving pistonfitted with seals to ensure a leak-free seal betweenthe Sample and pre-charge side of the piston is able to move freely within the cylinderwhile maintaining the segregation between the twoends of the cylinder. This piston also incorporatesa set of magnets to interface with the magneticsensor to determine the level of the Sample fluidwithin the Vessel . A visual level indication can beobserved on the DuraSite Vessel by the position ofthe magnetic level marker on the operation an inert gas pressure is applied to thepre-charge end of the Sample cylinder. This inertgas pressure should exceed the anticipatedequilibrium vapor pressure of the will ensure the Sample is maintainedin a single should be introduced to the cylinder fromthe product end.

6 The cylinder should never be filledover 80% full by volume, to allow a safe cushionfor any expansion of the product due to changes inthe use of the Vessel would be as follows:Step 1: In The LabConnect a regulated inert gas supply to the pre-chargevalve. The product valve should be open. By carefullycontrolling the pre-charge valve and the regulator, thevessel can be slowly charged with pre-charge gas(NOTE: This should be done slowly to prevent slam-ming the piston down to the opposite end). The pres-sure on the pre-charge pressure gauge should bebrought to a reading of 10-50 psi above the expectedpressure of the product in the field. Close the pre-charge valve and disconnect the gas supply.

7 Check thepre-charge valve, relief device, and the pre-chargepressure gauge for leaks. Any leaks should be stoppedbefore continuing. The Vessel should be placed in apadded carrying case and made ready for field 2: In The FieldConnect the pre-charged Sample Vessel to the productsupply (NOTE: the pre-charge pressure gauge readingshould be greater than the product supply pressurereading. If not, repeat Step 1 above).Step 3:Once the Vessel is connected to the product supply, itis necessary to vent a small amount of product prior tofilling the Vessel . This assures fresh product andremoves any air or gas when dealing with liquids. Thiscan be done by loosening the product purge valve a verysmall amount until the product is purged.

8 After thoroughpurging, the product purge valve should be 4:The product pressure gauge reading should be 10-50psi below the pre-charge pressure gauge reading. Bycarefully opening the pre-charge valve, the pressurebecomes equalized. The pre-charge valve should becarefully controlled so as to not vent the pre-charge gastoo fast. The pre-charge port should then be connectedto a pipeline connection or relief valve (page 11), whichwill allow movement of the piston while maintaining pre-charge on the DuraSite Installation & Use:DS-500(1) Version 11142003YZ Systems, Inc. 3101 Pollok Drive Conroe, Texas USA 77303 P: F: 5:When the Vessel becomes a maximum of 80% full(see volume indicator), all valves should be product connection is slowly broken in order tovent any trapped product.

9 After Vessel removal, allconnections should be checked for leaks and thepre-charge and product valve ports capped to pre-vent 6:The Vessel should be labeled and placed back intothe padded case and made ready for 7: In The LabPrior to analysis, the product should be mixed. Thisis accomplished simply and efficiently by invertingthe Vessel end-over-end, causing the mixing ball tofall through the product. Approximately 10-12 trips ofthe mixing ball through the product assures a ho-mogenous 8:The regulated pre-charge gas should be recon-nected to the pre-charge side of the Vessel . The pre-charge gas supply should remain open during 9:Purging a small amount of product from the vesselremoves unmixed product from the tee, relief device,gauge, etc.

10 The unit can now be connected to achromatograph and the product 10:After analyzing, the remainder of the product shouldbe dumped and the Vessel properly cleaned. Normalcleaning can be accomplished by rinsing the productend with a petroleum solvent and flushing with ac-etone. If a more thorough cleaning is required, thevessel should be DuraSite Installation & Use:WARNING: A Portable Sample Vessel shouldnever be filled to more than 80%. This allows a20% pre-charge cushion to absorb thermal ex-pansion of the : Extreme care should be taken whenpreparing a Vessel for shipment. Both valves shouldbe capped to prevent possible leakage. The vesselshould be placed in a snug-fitting, well-padded anddurable case.