Taylor-Wharton LP3 - Manual (Page 14)

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. Take time to visually inspect each shipment
in the presence of the carrier’s agent before accepting delivery. If any damage is observed, make an
appropriate notation on the freight bill. Ask the driver to sign the notation before receiving the equipment.
Do not accept equipment with damage that may affect serviceability.
Handling
The Laser Pak III should be handled only by a forklift or crane. Ensure that handling equipment has adequate
rated capacity for the system weight listed on the general arrangement drawing in the appendix. The
galvanized steel pallet and frame provide easy handling by forklift. The Laser Pak III 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.
Always transport, operate, and store the unit in the vertical position. Never place the unit on its side.
Important: When lifting by crane, use the lift-eyes provided on the top of the frame. Never lift the unit
overhead. Visually inspect the integrity of the frame and pallet before lifting.
Determining Proper Fill Weight
Cryogenic liquid containers must be filled in a manner that ensures enough gas head space (ullage) for liquid
to expand as it warms. Using the procedure below, first determine the proper fill weight of each container.
The weight derived is then used in either the pump transfer or pressure transfer filling procedures explained
below.
1.
Place the container on a scale and weigh it both with and without the fill hose attached. The
difference between the two weights is the fill hose weight.
2.
To determine the weight at which the fill should be stopped, add the maximum product weight
from the table below, the transfer line weight, and the tare weight from the container’s data plate.
Maximum Product Weights
Product Weight
Argon 1028 pounds
Oxygen 845 pounds
Nitrogen 557 pounds
Filling by Pressure Transfer
Filling by pressure transfer is accomplished by lowering the pressure in the Laser Pak III below that of the
source vessel. Typically the source vessel is a cryogenic bulk tank. The pressure is reduced in the Laser Pak
III by venting gas through the vent valve (V-4). Liquid is pushed by pressure from the bulk tank and into the
Laser Pak III.
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