Honeywell HON 512, User And Maintenance Manual

Page: 71 / 208

Maintenance
HON 512 with HON 650 pilot user manual 71
The tightening torques specified in the table apply to the maintenance instructions for the
actuator assembly. When screwing the body sections (step 24 in the
Maintaining the inlet
body section and step 1 in the Assembling the actuator assembly section), the tightening
torques must be increased gradually. Start by tightening the screws with a third of the tight-
ening torque, then with two thirds, and, finally, with the full tightening torque in a criss-cross
sequence.
Section Tightening torque by DN nominal sizes in Nm (ft lbs)
Step 25/
25
25/
100
25/
150
50/
50
50/
150
50/
200
80/
80
80/
250
100/
100
100/
300
Maintaining the
outlet body
10 - 30
(22) 55
(41) - 55
(41) 55
(41) - 100
(74) - 100
(74)
Maintaining the
inlet body
18 4
(3) 4
(3) 4
(3) 8
(6) 8
(6) 8
(6) 8
(6) 8
(6) 15
(11) 15
(11)
Maintaining the
inlet body
24 100
(74) 100
(74) 100
(74) 250
(185) 250
(185) 250
(185) 250
(185) 250
(185) 500
(369) 500
(369)
Assembling the
actuator assembly
1 30
(22) 30
(22) 30
(22) 100
(74) 100
(74) 100
(74) 100
(74) 100
(74) 250
(185) 250
(185)
For purposes of clarity, the wire springs are shown as hatched areas in the diagrams. When
the relief housing is filled with wire springs, the wire springs must protrude upwards beyond
the outlet section’s screw -on surface. The following clearance must be maintained based on
the nominal outlet size:
Nominal outlet size Clearance X [mm]
DN 100 8
DN 150 10
DN 200 12
DN 250 16
DN 300 16
Observe the following cleaning instructions:
▪
Before assembly, all parts must be cleaned in order to remove any foreign particles
(swarf) and soiling.
▪
If screws, bolts, or washers are replaced with identical new parts, any oil on these new
parts must first be removed.
Tightening torques for DN
25
– DN 100
actuator assembly
Notes on filling the relief
housing with wire springs
Cleaning