Type Y696
5
2. Remove the adjusting screw (key 2) and the upper
spring seat (key 44) and change the control spring to
match the desired spring range.
3. Replace the upper spring seat (key 44) and the
adjusting screw (key 2).
4.Install a replacement closing cap gasket (key 35), if
necessary, and reinstall the closing cap (key 2).
5. If the spring range was changed, be sure to change
the stamped spring range on the spring case name-
plate.
To Maintenance Diaphragm Parts:
1. Remove the closing cap (key 3), and the adjusting
screw (key 2).
2. Remove the hex nuts (key 22), cap screws (key 21)
and spring case (key 23).
3. Lift the upper spring seat (key 44), and control
spring (key 1) off the diaphragm and plate assembly
(key 5).
4. Remove the diaphragm and plate assembly (key 5)
by tilting them so that the pusher post (key 8) slips off
the lever assembly (key 9).
5. To separate the diaphragm assembly (key 5) from
the attached parts, unscrew the cap screw (key 30)
from the pusher post (key 8).
6. To replace the lever assembly (key 9), remove the
machine screws (key 11). To replace the stem (key 13)
pull the stem (key 13) out of the lower casing assembly
(key 20).
7. Install the stem (key 13) into the lower casing
assembly (key 20).
8. Install the lever assembly (key 9) into the stem
(key 13) and secure the lever assembly (key 9) with the
machine screws (key 11).
9. During the assembly procedure, use lubricants on
parts as indicated in figure 4 and replace parts as
required.
10. Install the parts on the pusher post in the order
listed below:
• Diaphragm plate gasket (key 7)
• Lower diaphragm plate (key 6)
• Diaphragm and plate assembly (key 5) pattern side up
• Control spring seat (key 4)
11. Insert and tighten the diaphragm cap screw (key 30)
to secure the diaphragm parts to the pusher post (key 8).
12. Install the assembled parts in the lower casing
(key 20). Make sure that the lever (key 9) fits in the
pusher post (key 8) and that the holes in the diaphragm
align with the holes in the lower casing.
13. Install the spring case (key 23) on the lower
casing assembly (key 20) so that the vent assembly
(key 56) is correctly oriented, and secure with the cap
screws (key 21) and hex nuts (key 22) fingertight only.
14. Place the spring (key 1) in the spring case
assembly (key 23), then install the upper spring seat
(key 44) and the adjusting screw (key 2).
15. Turn the adjusting screw (key 2) clockwise until
there is enough control spring (key 1) force to provide
proper slack to the diaphragm (key 5). Using a criss-
cross pattern, finish tightening the cap screws (key 21)
and hex nuts (key 22) to 15 to 20 foot-pounds (20 to 27
N•m) of torque. To adjust the outlet pressure to the
desired setting, refer to the Startup and Adjustment
section.
16. Install a replacement closing cap gasket (key 35)
if necessary, and then install the closing cap (key 3).
Parts Ordering
When contacting your Fisher sales office or sales
representative about this regulator, include the type
number and all other pertinent information stamped on
the nameplate. Specify the complete 11-character part
number from the following parts list when ordering
replacement parts.
Parts List
In this parts list, parts marked NACE are intended for
corrosion- resistant service as detailed in the National
Association of Corrosion Engineers (NACE) standard
MR0-175-90.
Type Y696 Regulator (figure 4)
Key
Description
Part Number
1
Control Spring, plated steel
See table 2
2
Adjusting Screw, zink
1A589644022
3
Closing Cap
Zink
1A589544022
Steel
1J880124092
4
Lower Control Spring Seat, zink
0X014744012
5*
Diaphragm
Nitrile
0R032502072
Fluoroelastomer
0R0325X0032
6
Lower Diaphragm Plate
Stainless steel
0V003935032
Stainless steel (NACE)
0V0039X0022
