Brooks Instrument 1355 - Manual (Page 21)

4-1
Models 1350E and 1355E
Section 4 Maintenance Installation and Operation Manual
X-VA-1350E-eng
Part Number: 541B082AHG
August, 2012
4-1 Disassembly and Cleaning
It is recommended the user periodically inspect the tube and float, and clean if
necessary. Dirt or foreign materials adhering to the tube and float may cause
inaccuracy and sticking of the float. The metering tube (Borosilicate glass) and
related parts may be cleaned with any solvent which does not attack glass. To
disassemble use the following procedures:
a.Remove the plastic window and back plate.
b.Loosen the seal spindle or jack screw by turning it counterclockwise with a
5/32" hex wrench. The tube may now be canted out of the meter housing.
c. On meter sizes 1 through 6, the tube, float and float stops may be cleaned
as an assembly or may be diassembled for cleaning. Using a small hook,
remove either Teflon
® float stop from the metering tube and remove the
float. Be careful not to chip the tube.
d.Packing seats and packing inserts may now be removed.
e.With the metering tube out, the seal spindle or jack screw may be rotated
clockwise for removal. It should not be necessary to remove the seal
spindle unless the O-ring which seals the spindle requires replacement.
The O-ring may be used as long as it is not torn or distorted.
f. The needle control valve assembly may be removed by turning the valve
body counterclockwise. The valve seat, stem and packing then may be
removed easily from the valve body for cleaning or replacement.