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46-638 Magnetic Liquid Level Indicators

1.8 Special Accessory Installation

1.8.1 Insulation or Blanket Installation

Factory recommended high temperature insulation specifications:

Temperature Thickness Liner Jacket

0° to +250° F (-18° to +121° C)

⁄2"

Weather resistant silicone cloth

+251° to +500° F (+122° to +260° C) 1" Weather resistant silicone cloth

+501° to +1000° F (+261° to +538° C) 2" Weather resistant aluminized silicone cloth

• Thickness is

⁄2" when the MLI has switches or a transmitter.

• Insulation used is 8 lb. density ceramic blanket

• All removable insulated blankets are fastened to the MLI by

velcro and straps. Quilting pins available as an option.

• All removable insulation blankets are sewn with fire retardant

teflon thread.

• High temperature guide for the level flow gauge side mount:

Consult factory for specific temperature guide lines.

Figure 1

Low Temperature

Insulated Magnetic

Level Indicator

• Purpose: To maintain the required low temperature of the

service fluid to be measured.

• All insulation joints will be staggered.

• All insulation joints will be sealed with a non-breathing

moisture resistant mastic.

• All weather resisting jacketing seams will be sealed with a

weather resistant caulk.

• The weather resistant jacket will be sealed to the 2" or 4"

plexiglass frost extension, with weather resistant caulk.

• The face of the frost extension must always be exposed.

• Cryogenic units will be flipper style indicators.

Factory recommended cryogenic insulation specifications:

Temperature Thickness Liner Jacket

+32° to -100° F (0° to -73° C) 2"

Outdoor .016 smooth aluminum Polyurethane with all

-101° to -320° F (-74° to -196° C) 4"

jacket with vapor barrier service jacket vapor barrier

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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Orion-instruments Atlas Manual de usuario Pagina 7