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Section 3
Model 351/352/353 Liquid Level Systems
NOTE—W
eldment should join both ends (male/female) using the capillary tubing as a “backup ring.”
Penetration thr
ough the tubing wall is not required.
Figure 3.3—3/16-in. OD capillary tubing coupling welds
IMPORTANT: All parts are solution annealed 304L stainless steel. Please adhere to the
following welding practices:
(1) Weld type: GTAW V-groove, 45 amps, 10 volts, 20 CFH (9.5 l/m)
Argon gas flow.
(2) Use 1/16” dia. Type 308 filler rod