7
6.1.4. Reassembly – Regulator
Ensure that the sensor assembly has been correctly assembled as per 6.1.3 prior to
following the instruction below.
i.
With the regulator body (22) upright and secured in a vice, place the main valve
spring (16) and main valve (17) into the lower bore.
ii.
Place the soft seat (18) into the bore, with the outer edge chamfer facing
downwards.
NOTE: on Cv 0.1 and Cv 0.3 models, ensure that the 9x1mm o-ring (not shown) is
placed into the body and the soft seat is placed with outer o-ring groove is facing
down.
iii.
Place the connector pin (20) into the seat nut (21), ensuring that the chamfered
sealing face is facing upwards.
iv.
Locate the wire retaining clip (19) into the seat nut (21) and push firmly in place.
v.
Screw the seat nut (21) into the regulator body (22).
vi.
Use a 17mm open ended spanner to locate vertically over the seat nut (21), then
use an adjustable spanner to grip the 17mm spanner and tighten the seat nut
(21) securely to compress the soft seat (18).
vii.
The sensor assembly may then be placed into the regulator body (22).
viii.
Place the load spring (9) onto the spring rest (11) and locate the adjusting
mechanism (6, 7, 8, 30) into the load spring and screw the bonnet (10) onto the
body (22).
ix.
Torque the bonnet to approximately 90 – 100 Nm and secure by tightening the
M3 grub screw (26) located at the top of the regulator body (22).
x.
Place the hand wheel (5) onto the adjusting screw (8) and tighten the lock nut
(25).
xi.
Secure the nameplate (4) with the M3 pan screw (27).
It is recommended that all parts in the repair kits are used. Any defect parts removed during
the service should be disposed of. Parts should be kept clean in line with media
requirements. Following re-assembly of the regulator, pressure tests should be made to
both the inlet and outlet side of the regulator, to ensure there is no internal or external
leakage across the regulator.
To ensure that the main valve assembly has been correctly and effectively installed it may
be required to perform the appropriate seat leak test as per ANSI/FCI 70-2.
