Ametek 930

5-58 | Model 900 ADA / Model 930 Sulfur Pit Analyzers
Heater Plate Flange Flamepath (Joining Surfaces)
Normally, the parts that make up the Heater Plate and its Seal Assembly
are not subject to any movement that would cause damage or wear to any
of the parts. However, any time the Heater Plate and its Seal Assembly are
opened, inspect the flamepath for scratches, indentations, or other dam-
age. For all parts, the maximum surface roughness must be 6.3 µm or less.
Use A2 stainless steel fasteners with yield stress ≥450 MPa (65,300 psi).
The minimum flamepath lengths and gaps for the different parts that
make up the Heater Plate and its Seal Assembly are:
Heater Top/Heater Bottom
The flamepath length must 12.1 mm or greater and the gap must not
exceed 0.1 mm.
Thermal Tube/Seal Body
The flamepath length must 19.2 mm or greater and the gap must not
exceed 0.05 mm.
Seal Body/Seal Cover
The flamepath length must 17.4 mm or greater and the gap must not
exceed 0.07 mm.