TW-407 MicroBulk 1000/1500/2000/3000 Instruction 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.
TW-407 Rev.- TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TW-407 Rev.- INTRODUCTION This manual provides information for the operation and maintenance of Taylor-Wharton’s new line of MICRO BULK cryogenic gas supply systems. These products store cryogenic liquid and dispense it as a warm pressurized gas. The MICRO BULK is designed for applications requiring nitrogen, argon, oxygen or CO2 gas. Additional product specifications, flow diagram, views, and important dimensions are shown throughout this manual.
TW-407 Rev.- SPECIFICATION MODEL MB-1000HP MB-1000VHP MB-1500HP MB-1500VHP Dimension Foot Print in(mm) 54 x 54(1372x 1372) 54 x 54(1372x1372) 62 x 60(1575x 1524) 62 x 60(1575x 1524) Cylinder Diameter in(mm) 42(1067) 42(1067) 48(1219) 48(1219) Height in(mm) 90.5(2299) 90.5(2299) 96.5(2451) 96.
TW-407 Rev.- SPECIFICATION MODEL MB-2000HP MB-2000VHP MB-3000HP MB3000VHP Dimension Foot Print in(mm) 62 x 60(1575x 1524) 62 x 60(1575x 1524) 71 x 71(1803x 1803) 71 x 71(1803x 1803) Cylinder Diameter in(mm) 48(1219) 48(1219) 59(1499) 59(1499) Height in(mm) 117.5(2985) 117.
TW-407 Rev.- WARNINGS 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.
TW-407 Rev.- WARNINGS 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. Protect your eyes and cover the skin where the possibility of contact with the liquid, cold pipes and equipment, or the cold gas exists.
TW-407 Rev.- WARNINGS 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.
TW-407 Rev.- WARNINGS Cover Eyes and Skin If released to atmosphere, liquid carbon dioxide will turn to carbon dioxide snow. Accidental contact of carbon dioxide snow or cold gas with the eyes or skin may cause severe frostbite. Handle liquid so that it will not vent or spill. Protect your eyes with safety goggles or a face shield, and cover the skin to prevent contact with snow or cold gas, or with cold pipes and equipment.
TW-407 Rev.- PIPING CIRCUITS The following information describes 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 shown below. These component and circuit descriptions should be understood before attempting operation.
TW-407 Rev.- Liquid & Vent Circuits The liquid valve (V-3) communicates with the bottom of the vessel. Liquid is 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. Opening the vent valve reduces pressure in the vessel during filling. It also serves as a “full trycock”, venting liquid from the vessel when the liquid level exceeds 100%.
TW-407 Rev.- Fill Circuits The Fill circuit may be used for filling from the Taylor-Wharton MICRO BULK Cryogenic Delivery System or for filling by a cryogenic pump. A check valve (CV-1) will prevent product from escaping the vessel.
TW-407 Rev.- 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 outlet valve (V-6) and pressure building inlet valve (V-7) permits the circuit to function. When the pressure inside the vessel drops below the pressure builder setting, the pressure building regulator (PCV-1) opens.
TW-407 Rev.- External Pressure builder, and Economizer Circuit The pressure builder(PB) inlet circuit provides pressurized cryogenic liquid to an external pressure builder. Opening the PB Inlet Valve (V-7) allows liquid, driven by the pressure within the vessel, to flow into the external pressure builder. The pressure builder uses heat from the ambient air to convert the liquid into a gas and warm it. The economizer circuit reduces product loss due to normal evaporation of the liquid within the vessel.
TW-407 Rev.- Safety Devices The MICRO BULK features safety valves to prevent over-pressurization of the vessel. The safety valves (SV-1A and SV-1B) relieve pressure when it exceeds the maximum operating pressure of the vessel. The valve resets when pressure drops below this point. In addition, the primary safety valve is supported by a secondary relief device consisting of a rupture discs (R-1A and R-1B).
TW-407 Rev.- Instrumentation Circuits The instrumentation consists of a pressure gauge and liquid level gauge or differential pressure gauge. The pressure gauge (PI-1) displays the inner vessel pressure in pounds-per-square-inch and kilo pascals. The liquid level gauge (LI-2) 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.
TW-407 Rev.- INSTALLATION Handling The MICRO BULK should be handled only by a forklift or crane. Ensure that handling equipment has adequate rated capacity for the system weight listed on the specification page. The MICRO BULK is a rugged product intended for years of industrial use. However, take care when moving the unit. Abuse (dropping or careless handling by forklift) may affect the integrity of the insulation system or damage piping.
TW-407 Rev.- OPERATIONS These instructions are for operators experienced with cryogenic equipment. Before operating this product, become familiar with the safety precautions in this manual and in reference publications. Know the location and function of all components. Filling by Pressure Transfer Filling by pressure transfer is accomplished by lowering the pressure in the MICRO BULK below that of the source vessel. Typically the source vessel is a truck-mounted vessel.
TW-407 Rev.- OPERATIONS Before disconnecting fill hose from fill connection (CN-1) open fill purge valve to discharge product from fill hose. After this operation is complete close fill purge valve then disconnect hose from (CN-1). Withdrawing Product External Vaporizer To withdraw product from the MICRO BULK, connect a suitable vaporizer to the vaporizer inlet connection (CN-4). Equip the vaporizer with a relief valve sized in accordance with the vaporizer manufacturer’s recommendations.
TW-407 Rev.- 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.
TW-407 Rev.- MAINTENANCE Regulators The pressure-building 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 lock nut on the adjusting screw on the top of the regulator.
TW-407 Rev.- MAINTENANCE 8. To reset the regulator, loosen the lock nut on the adjusting screw. Raise the set point by turning the adjusting screw clockwise; lower the set point by turning the screw counterclockwise. After adjustment, repeat steps 5 and 6 to check the setting before reinstalling the regulator on the liquid container. 9. When reinstalling the pressure-building regulators on the system, orient the regulator so the flow arrow points away from the pressure-building valve.
TW-407 Rev.- OPERATIONS 1. With liquid in the container, the outer casing will be much colder than comparative containers. 2. Frost, indicating the liquid level, may be visible on the outer casing of the container. 3. Condensation may form on the container. Note that some icing or condensation is normal around the piping connections of the vessel. Condensation may also occur on the vessel outer surface as a result of high humidity. 4. The relief valve will open continuously until the container is empty.
TW-407 Rev.- TROUBLE-REMEDY GUIDE Trouble Possible Cause Remedy Low operating pressure. a. Safety valve leaking or frozen open. b. Safety disc ruptured. c. Piping leaks to atmosphere. d. Pressure building / economizer regulator malfunction. e. Excessive product withdrawal. f. Pressure building valve closed. g. Malfunctioning pressure gauge. h. Excessive frost on pressure building coils. a. Thaw out valve or replace if necessary. b. Replace disc. c. Leak test and repair piping. d. Adjust regulators.
TW-407 Rev.- STANDARD REPLACEMENT PARTS Fill and Vent (VHP/HP) 4 2 5 1 3 Part List ITEM QTY PART NUMBER DESCRIPTION 1 3 6914-4050 VALVE, 1/2"NPT, REGO 2 1 6914-4053 HANDWHEEL, GREEN, FOR REGO 9450/9460 VALVE 3 1 6914-4054 HANDWHEEL, BLUE, FOR REGO 9450/9460 VALVE 4 3 2219194 HALF NIPPLE, 1/2" SCH 80 X 4.
TW-407 Rev.- STANDARD REPLACEMENT PARTS Relief kit (VHP) 4 3 5 8 PART NUMBER Part List 10 6 9 7 ITEM QTY 1 2 2050311 U-BOLT,3/4" PS, .31"-18 THD, SS 2 4 38221800 HEX NUT, .31-18 UNC, BRASS 3 1 43152855 COUPLING, .50 FPT-3000#, T304 SS 4 1 44402201 PIPE PLUG, 1/2" NPT, BRASS SWAGELOK 5 2 45255076 ELBOW,90 DEG.
TW-407 Rev.- STANDARD REPLACEMENT PARTS Relief kit (HP) 4 3 6 5 9 8 PART NUMBER Part List 10 7 ITEM QTY 1 2 2050311 U-BOLT,3/4" PS, .31"-18 THD, SS 2 4 38221800 HEX NUT, .31-18 UNC, BRASS 3 1 43152855 COUPLING, .50 FPT-3000#, T304 SS 4 1 44402201 PIPE PLUG, 1/2" NPT, BRASS SWAGELOK 5 2 45255076 ELBOW,90 DEG.
TW-407 Rev.
TW-407 Rev.
TW-407 Rev.- STANDARD REPLACEMENT PARTS PB Economizer Kit (VHP) 1 17 7 8 6 16 4 3 13 15 10 12 9 PART NUMBER Part List 5 2 14 11 ITEM QTY 1 1 4515-1222 CONNECTOR, MALE, 1/2" ODT X 3/8" BW, SS, SWAGELOK ONLY DESCRIPTION 2 1 6913-9079 RELIEF VALVE, 1/4" MNPT, 600 PSIG, BRASS 3 1 6914-4050 VALVE, 1/2"NPT, REGO 4 1 6914-4053 HANDWHEEL, GREEN, FOR REGO 9450/9460 VALVE 5 1 6999-9008 REGULATOR, 1/4" FNPT, SET AT 425 PSIG 6 4 2050310 U-BOLT, 1 PS, .
TW-407 Rev.
TW-407 Rev.
TW-407 Rev.
TW-407 Rev.- STANDARD REPLACEMENT PARTS Instrumentation Kit (VHP/HP) 14 15 13 10 9 5 12 7 6 8 4 2 3 1 16 11 BILL OF MATERIALS ITEM NO. PART OR CODE NO. NO. REQ'D DESCRIPTION 1 45702003 1 BULKHEAD CONNECTOR, .25 ODT x .25 FPT, SS SWAGELOK ONLY 2 57143737 1 PRESSURE GAUGE, 4", 600PSI, 1/4"NPT LBM 3 57143696 1 GAUGE,DIFF.PRESS3.5"DIAL,0-150 4 45500513 1 TEE, MALE BRANCH, .25 X .25 X .
TW-407 Rev.- STANDARD REPLACEMENT PARTS Pallet Kit (VHP/HP) 4 2 1 3 Part List ITEM QTY PART NUMBER DESCRIPTION 1 4 41221250 ELASTIC STOP NUT,.50-13UNC, ESNA 79-NE-083, SS 2 4 41435250 CAP SCREW, HEX HEAD, .50-13 UNC x 2.0 LG, SS 3 8 41735810 WASHER, PLAIN, .50, STN.STL.
TW-407 Rev.- Taylor-Wharton Cryogenics LLC 4075 Hamilton Boulevard Theodore, AL 36582 Phone : +251 - 443 - 8680 Phone : +800 - 898 - 2657 www.taylorwharton.
