T208VR Series
8
8. Reassemble the diaphragm assembly in the
following order:
• Pusher post (key 8)
• Diaphragm head gasket (key 45)
• Lower Diaphragm head (key 7)
• Diaphragm (key 10)
• Upper Diaphragm head (key 7)
• Washer (key 36)
Secure the parts with hex nut (key 21) using
60 to 72 inch-pounds / 6.8 to 8.1 N•m of torque.
9.
Install the pusher post (key 8) plus attached
diaphragm parts onto the lever assembly (key 16).
10.
Install the spring case (key 3) and control spring
(key 6) on the lower casing (key 4) so that the
vent assembly (key 26) is correctly oriented and
secure them with the spring case cap screws
(key 24) and hex nuts (key 23) to fingertightness
only. Install upper spring seat (key 19) and
adjusting nut (key 20).
11.
Turn the adjusting nut (key 20) clockwise until
there is enough control spring (key 6) force
to provide proper slack to the diaphragm
(key 10) and attached parts. Using a crisscross
pattern, finish tightening the spring case cap
screws (key 24) and hex nuts (key 23) to 90 to
126 inch- pounds / 10.2 to 14.2 N•m of torque.
Adjust the control pressure to the desired pressure
setting, refer to Adjustment section.
12.
Install a replacement closing cap gasket (key 25)
if necessary and then install the closing cap
(key 22).
To Convert Constructions
The Type T208VR to the Type T208VRM:
New parts required: keys 30, 31 and 34
1.
Remove pipe plug (key 27, Figure 3) from the
diaphragm casing (key 4).
2.
Refer to steps 1 and 3 in the Body Area
Maintenance section.
3.
Insert the throat seal O-ring (key 31, Figure 4) and
one machine screw (key 34).
4.
Insert the stem seal O-ring (key 30) by following
steps 1 through 7 and 9 through 12 in the
Diaphragm and Spring Case Area Maintenance
(Type T208VRM Vacuum Regulator) section.
The Type T208VRM to the Type T208VR:
New parts required: key 27
1.
Insert pipe plug (key 27, Figure 3) in the
diaphragm casing (key 4).
2.
Follow steps 1 through 7 in the Diaphragm and
Spring Case Area maintenance procedure under
Type T208VR section. Make sure to remove the
stem seal O-ring (key 30, Figure 4) right after
step 5. After removing the stem seal O-ring,
continue steps 9 through 12.
3.
Follow steps 1 through 10 of Body Area
maintenance section making sure to remove the
throat seal (key 31, Figure 4) and machine screw
(key 34, Figure 4) in step 4.
Table 2.
Body Part Numbers (Key 1)
BODY MaTEriaL
EnD COnnECTiOn STYLE
(1)
ParT nUMBEr
3/4-Inch / DN 20 Body
1-Inch / DN 25 Body
Gray cast iron
NPT
ERSA03695A0
ERSA03697A0
316L/316 Stainless steel
NPT
(standard)
ERSA00231A0
ERSA00764A0
CL150 RF
ERSA01470A6
ERSA01470A7
1. All flanges are welded on. All flange dimensions are 14-inches / 356 mm face-to-face.
