Product Overview

IMMERSION WELLS AND COMPRESSION FITTINGS
68-0040—05 2
SPECIFICATIONS
Models:
Immersion Wells: Allow heat transfer while protecting
sensing bulb from controlled medium and seal off tapping
to permit bulb removal without draining the boiler.
Available in copper, stainless steel, mild steel and Monel.
See Table 1 for copper. See Table 2 for stainless steel, mild
steel and Monel.
Compression Fittings: Allow bulb insertion directly into the
controlled medium with boiler draining. Can also be used
to provide positive seal in duct applications. Available in
brass and stainless steel. See Table 3.
Element Holders: Support bulb and capillary or averaging
element in a duct. See Table 4.
Dimensions:
See Tables 1, 2, 3 and 4, and Fig. 1 and 2.
Temperature Ratings:
IMPORTANT
Do not exceed the maximum temperature rating of
the controller element.
Wells:
Copper: 300°F (149°C) maximum.
Other Materials: Maximum temperature rating limits of the
controller sensing bulb and capillary.
Capillary Compression Fittings: 250°F (121°C) maximum.
Element Holders:
311266D Bulb Holder: -40°F to +100°F (-40°C to +38°C).
Other Element Holders: Maximum temperature rating lim-
its of the controller sensing bulb and capillary.
Maximum Pressure Ratings:
Copper Wells: 255 psi (1758 kPa) at 300°F (149°C).
Other Wells: 1500 psi (10,342 kPa) at 700°F (371°C).
Capillary Compression Fittings:
Water: 50 psi (345 kPa)
Air: 15 psi (103 kPa).
Accessories:
See Tables 5 and 6.
Fig. 1. Capillary compression fitting
dimensions and components.
PACKING
NUT
INSULATION DEPTH
MINIMUM
INSERTION LENGTH
SLOTTED
BRASS
WASHERS (4)
TUBING
COMPOSITION DISK
FITTING FOR 1/2
OR 3/4-14 NPT
TAPPED HOLE
APPROXIMATELY 4-3/4 IN.
M17260