Brooks Instrument 1358 - Manual (Page 18)

Installation and Operation Manual
X-VA-1358-eng
Part Number: 541B041AAG
September, 2012
4-2
Section 4 Maintenance
Model 1358
h. 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.
i. 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.
Reassemble the flowmeter as follows:
a. Use the reverse of Steps a through e of the disassembly procedure to
reassemble the meter.
b. Prior to installing the needle control valve assembly make certain that
the valve stem is turned completely counterclockwise
(fully open position) to prevent damage to the valve seat.
WARNING
Pressure test the meter before returning it to service. Hydrostatic
pressure testing should be performed by qualified personnel or
serious injury and/or damage to the equipment can result.