Express Fill 450 Instruction Manual Do not attempt to use or maintain these units until you read and understand these instructions. Refer to the TaylorWharton’s Safety First booklet (TW-202) for handling cryogenic material. Do not permit untrained persons to use or maintain this equipment. If you do not understand these instructions, contact your supplier for additional information.
WARNING Safety Precautions for Liquid Oxygen Safety Precautions for Liquid Nitrogen INTRODUCTION System Description Specifications PIPING CIRCUITS Fill and Vent Circuits Express Fill Circuit Pressure Building Circuit Gas Withdrawal Circuit Economizer Circuit Safety Devices Instrumentation Circuits OPERATION Receiving Inspection Handling Customer Installed Equipment/Piping Filling by Pressure Transfer Filling by Pump Transfer Filling for Road Transport Withdrawing Gas Withdrawing Liquid Changing Gas Service
WARNING The following safety precautions are for your protection. Before installing, operating, or maintaining this unit read and follow all safety precautions in this section and in the reference publications. Failure to observe all safety precautions can result in property damage, personal injury, or possibly death.
the clothing immediately, removing it if possible. Such clothing will be highly flammable and easily ignited while the concentrated oxygen remains, and should not be considered safe for at least 30 minutes. Replacement Parts Must be Suitable for Oxygen Service Many materials, especially some non-metallic gaskets and seals, constitute a combustion hazard when in oxygen service, although they may be acceptable for use with other cryogenic liquids. Make no substitutions for recommended spare parts.
INTRODUCTION This manual provides information for the operation and maintenance of Taylor-Wharton's line of Express Fill 450 cryogenic gas supply systems. These products store cryogenic liquid and dispense it as a warm pressurized gas. The Express Fill 450 is designed for applications requiring nitrogen, argon, or oxygen gas. These products are ideal for on-site filling with Taylor-Wharton’s Express cryogenic liquid delivery vehicle.
Specifications Model EF-450-DOT Part Number M4500C03-EZ EF-450HP DOT EF-450VHP DOT H4500C03-EZ V4500C03-EZ EF-450 EF-450HP M4500C01-EZ H4500C01-EZ Dimensions Footprint Cylinder Diameter Height Empty Weight Capacity, Gross inches 31 x 31 31 x 31 31 x 31 31 x 31 31 x 31 (mm) 787 x 787 787 x 787 787 x 787 787 x 787 787 x 787 inches 30 30 30 30 30 (mm) 762 762 762 762 762 inches 74 74 74 74 74 (mm) 1,880 1,880 1,880 1,880 1,880 950 lbs 640 730 885 730 (kg) 290
PIPING CIRCUITS The following paragraphs describe the operation of the piping circuits of the system. The descriptions refer to the main components of each circuit and are grouped by function. Reference the piping schematic below and in the general arrangement drawing for the component designations. These component and circuit descriptions should be understood before attempting operation.
Fill and Vent Circuits The liquid valve (V-1) communicates with the bottom of the vessel. A stainless steel tag labeled “LIQUID” identifies the valve and the liquid connection (CN-1). Liquid is added or removed from the vessel through this connection and valve. The vent / trycock valve (V-2) is attached to a vertical tube in the upper portion of the vessel. The open end of the tube is positioned at 90% liquid level based on the vessel volume.
Express Fill Circuit The Express Fill circuit may be used for filling from the Taylor-Wharton Express Truck or for top filling by a cryogenic pump. Two check valves (CV-1 & CV-2) prevent product from escaping the vessel. A fill stop valve (FSV-1) within the vessel prevents over filling. This device functions when filled by the Taylor-Wharton Express Truck in automatic fill mode. The fill stop valve will not function when the vessel is filled by a typical cryogenic pump.
Pressure Building Circuit The pressure building circuit serves to build pressure after filling the vessel. The circuit is also used to ensure sufficient driving pressure during high product withdrawal periods. Opening the pressure building circuit valve (V-4) permits the circuit to function. A stainless steel tag labeled “P.B.” is attached to the valve.
Gas Withdrawal Circuit The gas withdrawal circuit vaporizes cryogenic liquid and warms it to ambient temperature for use in the final application. Opening the gas withdrawal valve (V-3) allows liquid, driven by the pressure within the vessel, to flow through the vaporizer (VC-1). The vaporizer uses heat from the ambient air to convert the liquid into a gas and warm it. The vaporizer, like the pressure building coil, is attached to the inside surface of the vacuum jacket.
Economizer Circuit The economizer circuit reduces product loss due to normal evaporation of the liquid within the vessel. The economizer stage of the pressure building/economizer regulator (PCV-1) opens when the pressure within the vessel exceeds the economizer setpoint. The economizer setpoint varies depending on the model. This allows gas from the top of the vessel to flow into the vaporizer circuit. Provided that gas from the vaporizer is being withdrawn for use, the vessel pressure will be reduced.
Safety Devices The Express Fill 450 features a safety valve to prevent over pressurization of the vessel. The safety valve (SV-1) relieves pressure when it exceeds the maximum operating pressure of the vessel. The valve reseats when pressure drops below this point. In addition, the primary safety valve is supported by a secondary relief device consisting of a rupture disc (R-1).
Instrumentation Circuits The instrumentation consists of a pressure gauge and differential pressure gauge. The pressure gauge (PI-1) displays the inner vessel pressure in pounds-per-square-inch and kilopascals. The liquid level gauge (LI-1) measures the difference in pressure between the top and bottom of the vessel. Product within the vessel creates a higher pressure at the bottom of the vessel than at the top. Readings on the liquid level gauge are in inches of water.
OPERATION These instructions are for operators experienced with cryogenic equipment. Before operating the system, become familiar with the safety precautions in this manual and in reference publications. Study this manual and the general arrangement drawing located in the back of this manual thoroughly. Know the location and function of all system components. Receiving Inspection Freight and damage claims are the customer’s responsibility.
2. Connect a transfer hose from the bulk tank to the liquid connection (CN-1). 3. Open the liquid valve (V-1) and vent valve (V-2) to begin the fill. 4. When liquid issues from the vent valve, the vessel is full. A 10% gas head space will remain above the liquid. Close the liquid valve (V-1). 5. Once liquid stops issuing from the vent valve (V-2), close the vent valve. 6. Close the liquid source supply valve and open the transfer hose dump valve. 7.
Withdrawing Liquid Attach a transfer hose from the receiver vessel to the Express Fill 450 liquid connection (CN-1) and open the adjacent liquid valve (V-1). The pressure in the container will drive liquid product out through the valve as long as the container pressure exceeds that of the receiver. Changing Gas Service The Express Fill 450 may be used for argon, oxygen, or nitrogen service. Follow these steps to properly change gas service: 1. Safely empty all liquid from the container. 2.
MAINTENANCE Routine inspections of the system are recommended. The need for maintenance usually becomes apparent from inspection and indications of improper operation. Typical trouble indications include leakage from valves or piping connections and excessive venting through relief valves. Keep a permanent log of all inspections and repairs performed. Such a log can be valuable in evaluating performance and scheduling maintenance.
Regulator A dual stage, spring-loaded regulator (PCV-1) is employed for the pressure building/economizer circuit. The regulator may be adjusted without removal from the system. The following procedure describes the process: 1. Fill the container with liquid product. 2. Open the pressure building valve and allow the container pressure to stabilize for about an hour. Note the pressure. 3. Loosen the adjustment screw on the top of the regulator to raise or lower the pressure to the desired point.
User adjustment of the pressure gauge or liquid level gauge is not possible. If the gauges are malfunctioning, they must be replaced. Empty the container of liquid and completely depressurize it before replacing either gauge. Note that the liquid level gauge may read erratically while the safety valve is venting. This is normal and will stop when the safety valve reseats. Checking Vacuum Cryogenic containers are two containers, one within the other.
Daily NER = First Weight – Second Weight Time between weights in hours X 24 If it has been determined that the vessel has a vacuum problem it will be necessary to repair and re-evacuate the vessel. A skilled service technician should perform vessel repair. Contact Taylor-Wharton customer service at 1-800-898-2657 for assistance in locating the closest service center.
Trouble-Remedy Guide Trouble Possible Cause Remedy 1. a. a. Thaw out valve or replace if necessary. b. Replace disc. c. Leak test and repair piping. d. Adjust regulators. Replace if necessary. e. Check for leaks downstream. Reduce product use. f. Open pressure building valve. g. Replace pressure gauge. h. Thaw pressure building coils. Low operating pressure. b. c. d. e. 2. 3. 4. Excessive system pressure. Leaking relief valve. Ruptured pressure vessel rupture disc.
Replacement Parts Order replacement parts from Taylor-Wharton Customer Service at 1-800-898-2657. Refer to the piping circuits section to identify the components.
APPENDIXES Appendix 1 – Express Fill 450 General Arrangement 24
4075 Hamilton Blvd. Theodore, Alabama 36582 U.S.A. Telephone (251) 443-8680 Fax (251) 443-2250 In U.S.
