Taylor-Wharton MicroBulk MB-450 Installation And Operation Manual
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Taylor-Wharton MicroBulk MB-450 Installation And Operation Manual

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BT- 434 REV.A
MicroBulk
MB - 450
Installation and Operation Manual
Do not attempt to use or maintain these units until you read and understand these instructions. Refer
to the Taylor Wharton'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.
www.taylorwharton.com

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Summary of Contents for Taylor-Wharton MicroBulk MB-450

  • Page 1 BT- 434 REV.A MicroBulk MB - 450 Installation and Operation Manual Do not attempt to use or maintain these units until you read and understand these instructions. Refer to the Taylor Wharton’s “Safety First” booklet (TW - 202) for handling cryogenic material. Do not permit untrained persons to use or maintain this equipment.

  • Page 2: Table Of Contents

    BT- 434 Rev.A TABLE OF CONTENTS WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Safety Precautions for Liquid Oxygen .

  • Page 3: Warning

    BT- 434 Rev.A WARNING The following safety precautions are for your protection. Before installing, operating, or maintain- ing 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.

  • Page 4: Safety Precautions For Liquid Nitrogen

    BT- 434 Rev.A WARNING Extreme Cold - Cover Eyes and Exposed Skin Accidental contact of liquid oxygen or cold issuing gas with the skin or eyes may cause a freezing injury similar to frostbite. Handle the liquid so that it won’t splash or spill.
  • Page 5 BT- 434 Rev.A WARNING Keep Equipment Area Well Ventilated Although nitrogen is non-toxic and non-flammable, it can cause asphyxiation in a confined area without adequate ventilation. Any atmosphere not containing enough oxygen for breathing can cause dizziness, unconsciousness, or even death. Nitrogen, a colorless, odorless, and tasteless gas, cannot be detected by the human senses and will be inhaled normally.

  • Page 6: Introduction

    BT- 434 Rev.A INTRODUCTION This manual provides information for the operation and maintenance of Taylor-Wharton’s line of MB- 450 cryogenic gas supply systems. These products store cryogenic liquid and dispense it as a warm pressurized gas. The MB-450 is designed for applications requiring nitrogen, argon, or oxygen gas.

  • Page 7: Specification

    BT- 434 Rev.A Specification Model EF-450-DOT EF-450HP DOT EF-450VHP DOT Part Number M4500C12-EZ H4500C12-EZ V4500C12-EZ Dimensions Footprint inch 31 x 31 31 x 31 31 x 31 (mm) 787 x 787 787 x 787 787 x 787 Cylinder Diameter inch (mm) Height inch...

  • Page 8: Piping Circuits

    BT- 434 Rev.A 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 sche- matic below and in the general arrangement drawing for the component designations. These compo- nent and circuit descriptions should be understood before attempting operation.

  • Page 9: Fill And Vent Circuits

    BT- 434 Rev.A Fill and Vent Circuits The liquid valve (V-1) communicates with the bottom of the vessel. A stainless steel tag labeled “LIQ- UID” identifies the valve and the liquid connection (CN-1). Liquid is added or removed from the vessel through this connection and valve.

  • Page 10: Express Fill Circuit

    BT- 434 Rev.A Fill Circuit The Fill circuit may be used for filling from the Microbulk Truck or for top filling by a cryogenic pump. The check valve (CV-1) prevents product from escaping the vessel. A fill stop valve (FSV-1) within the vessel prevents over filling. This device functions when filled by the Microbulk Truck in automatic fill mode.

  • Page 11: Pressure Building Circuit

    BT- 434 Rev.A 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 build- ing circuit valve (V-4) permits the circuit to function. A stainless steel tag labeled “P.B.” is attached to the valve.

  • Page 12: Gas Withdrawal Circuit

    BT- 434 Rev.A 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.

  • Page 13: Economizer Circuit

    BT- 434 Rev.A 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.

  • Page 14: Safety Devices

    BT- 434 Rev.A Safety Devices The MB-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 second- ary relief device consisting of a rupture disc (R-1).

  • Page 15: Instrumentation Circuits

    BT- 434 Rev.A 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.

  • Page 16: Operation

    BT- 434 Rev.A 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 thor- oughly.

  • Page 17: Filling By Pump Transfer

    Open the vent valve (V-2) to reduce pressure as needed. When filling using the Taylor-Wharton Express truck in automatic mode, the fill is stopped at a level providing an adequate gas head space.

  • Page 18: Withdrawing Liquid

    BT- 434 Rev.A OPERATION Withdrawing Liquid Attach a transfer hose from the receiver vessel to the MB-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.

  • Page 19: Maintenance

    However, the valves may be rebuilt without removal from the system. All of the globe valves use the same rebuild kit. The Taylor-Wharton part number for the rebuild kit is 1750-9C35. All valve components, except the body, are provided in the kit.
  • Page 20 BT- 434 Rev.A MAINTENANCE 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.

  • Page 21: Instruments

    BT- 434 Rev.A MAINTENANCE Instruments User adjustment of the pressure gauge or liquid level gauge is not possible. If the gauges are malfunction- ing, 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.
  • Page 22 If it has been determined that the vessel has a vacuum problem it will be necessary to repair and re-evacu- ate the vessel. A skilled service technician should perform vessel repair. Contact Taylor-Wharton custom- er service at 1-800-898-2657 for assistance in locating the closest service center.

  • Page 23: Trouble-Remedy Guide

    BT- 434 Rev.A MAINTENANCE Trouble-Remedy Guide Trouble Possible Cause Remedy a. Safety valve leaking or frozen a. Thaw out valve or replace if open. necessary. b. Safety disc ruptured. b. Replace disc. c. Piping leaks to atmosphere. c. Leak test and repair piping. d.

  • Page 24: Replacement Parts

    BT- 434 Rev.A MAINTENANCE 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. ITEM PART NUMBER DESCRIPTION VP50-9C44 Globe Valve, Liquid, 3/8” Pipe Stub VP50-9C41 Globe Valve, Vent, 3/8” Pipe Stub VP50-9C43 Globe Valve, Use, 3/8”...

  • Page 25: Appendixes

    BT- 434 Rev.A APPENDIXES Appendix 1 – MB - 450 General Arrangement GO TO TABLE OF CONTENT...
  • Page 26 BT- 434 Rev.A APPENDIXES GO TO TABLE OF CONTENT...
  • Page 27 BT- 434 Rev.A Taylor-Wharton Cryogenics LLC 4075 Hamilton Boulevard Theodore, AL 36582 Phone : +251 - 443 - 8680 Phone : +800 - 898 - 2657 www.taylorwharton.com P/N : BT-434 Rev.A Publication - ##### GO TO TABLE OF CONTENT...

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