P
AGE
8
Section 6 - Maintenance
The HM flowmeter, if properly applied, should provide many years of trouble-free service. Excessive flow
rates and/or temperature and pressure are conditions which most commonly cause damage to the flowmeter.
6.1 DISASSEMBLY AND INSPECTION
Verify that all line pressure is relieved with all valves closed prior to removal of the meter. Disconnect signal
cable and completely remove meter body from the product line. Remove clamp and separate meter housings.
Place all items on a clean area for inspection. Rotate flow Straighteners until they fall from the meter housing.
As components are removed from the housing inspect each piece for visible damage.
With the HM turbine wear is typically isolated to the rotor bearing and shaft.
Primarily rotor wear will occur on the inside diameter, or to the downstream side of the bearing. Premature
rotor wear is caused by over-ranged flow rates, or abrasive products that would deteriorate the rotor bearing.
(Figure 6.4)
Housing damage occurs from a worn rotor. The ID of the rotor can wear to a point where the OD will contact
the housing. This condition will immediately diminish the performance of the flowmeter. Prolonged operation
under these circumstances can permanently damage the meter housing (Figure 6.5).
FIGURE 6.2 HM MATERIALS LIST
FLOW
8
9
1
2
3
4
5
6
7
ITEM
HM075 (3/4”)
HM100 (1”)
HM150 (1.5”)
HM200 (2”)
DESCRIPTION
1
HM-075-1
HM-100-1
HM-150-1
HM-200-1
METER HOUSING
2
HM-075-2
HM-100-2
HM150-2
HM-200-2
GASKET
3
HM-075-3S
HM-100-3S
HM-150-3S
HM-200-3S
DOWNSTREAM FLOW STRAIGHTENER
4
HM-075-4S
HM-100-4S
HM-150-4S
HM-200-4S
ROTOR
5
HM-075-5S
HM-100-5S
HM-150-5S
HM-200-5S
UPSTREAM FLOW STRAIGHTENER
6
GH13Z-1.5
GH13Z-1.5
GH13Z-2
GH13Z-2.5
CLAMP
7
HM-075-7
HM-100-7
HM-150-7
HM-200-7
FLOW STRAIGHTENER HOUSING
8
HTS1000 (3-WIRE PROBE - INCLUDES JAM NUT)
PICK-UP PROBE
8a
HT75000 (2-WIRE PROBE - INCLUDES JAM NUT)
PICK-UP PROBE
9
CABLE-3W-25 (3-WIRE)
* EXTENSION CABLE STD. 25 FT.
9a
CABLE-2W-25 (2-WIRE)
* EXTENSION CABLE STD. 25 FT.
* CONSULT ANDERSON FOR OTHER OPTIONAL LENGTHS
