Fisher 399A - Page 6

Type 399A-161-112
5
The Type 161AYM to the Type 161AY:
New part required: key 27
1. Insert pipe plug (key 27) in the diaphragm casing (key 4).
2. Follow steps 1 through 3, and 6 through 8 in the Disassemble/Reassemble section of Diaphragm and Spring
Case Area Maintenance of this errata sheet to remove the stem seal O-ring (key 30).
3. Refer to steps 1 and 4 in the Body Area Maintenance section of this errata sheet to remove the disk assembly
(key 13).
4. Remove the throat seal O-ring (key 31) and one machine screw (key 33). Reassemble following steps 6 through
8 in the Body Area Maintenance section of this errata sheet.
• Replace the Type 161Y and 161YM Parts List section on page 37 with the following:
*Recommended Spare Parts
Type 161AY and 161AYM
Key Description Part Number
Spare Parts, Nitrile (includes keys 10, 11,
12, 13, 15, 30, 31, 33, 48, and 49) RY690AX0012
1 Body
Cast Iron 1E987119012
2 Cap Screw, 2 required 1C856228992
3 Spring Case Assembly
Ductile Iron 13B0109X042
4 Diaphragm Casing
Ductile Iron 47B3063X012
5 Orifice
3/32-inch (2,38 mm)(standard) 0R044135032
1/4-inch (6,35 mm)(fast response) 0B042035032
6 Spring
6 to 15-inches w.c. (15 to 37 mbar) 1B653927022
0.5 to 1.2 psig (0,034 to 0,083 bar) 1B537027052
1.2 to 2.5 psig (0,083 to 0,17 bar) 1B537127022
2.5 to 4.5 psig (0,17 to 0,3 bar) 1B537227022
4.5 to 7 psig (0,3 to 0,48 bar) 1B537327052
7 Diaphragm Head, 2 required 17B9723X032
8 Pusher Post 27B5354X012
10* Diaphragm
Molded Nitrile (NBR) 37B9720X012
Fluoroelastomer (FKM) 23B0101X052
11* Body Seal O-Ring
Nitrile 1H993806992
Fluoroelastomer 1H9938X0012
12* Insert Seal O-Ring
Nitrile 1B885506992
Fluoroelastomer 1B8855X0012
13* Disk Assembly
S30300 Stainless steel with
Nitrile (NBR) 1C4248X0202
Fluoroelastomer (FKM) 1C4248X0052
14 Stem 17B3423X012
15* Cotter Pin 1A866537022
16 Lever Assembly 1B5375000B2
Key Description Part Number
17 Machine Screw, 2 required 19A7151X022
18 Guide Insert 27B4028X012
21 Hex Nut 1A354024122
22 Closing Cap
Plastic (Standard) T11069X0012
Steel 1E422724092
23 Hex Nut, 8 required (not shown) 1A352724122
24 Cap Screw, 8 required 1A352524052
25* Closing Cap Gasket
Steel closing cap only 1P753306992
26 Vent Assembly
Spring Case Up (standard) 17A5515X012
27 Pipe Plug 1A369224492
30* Stem Seal O-Ring
Nitrile 1H2926G0012
Fluoroelastomer 1H2926X0022
31* Throat Seal O-Ring
Nitrile 1D682506992
Fluoroelastomer 1D6825X0012
33 Machine Screw 18A0703X022
35 Adjusting Screw 1B537944012
37 Spring Holder 1R982025072
38 Machine Screw 10B6189X022
39 Overpressure Spring 1B541327022
40 Pusher Post Connector 27B7982X012
46 Nameplate - - - - - - - - - - - -
47 Drive Screw, 2 required 1A368228982
48* Post Seal O-Ring
Nitrile 1D687506992
Fluoroelastomer 1N430406382
49* Connector Seal O-Ring
Nitrile 13A1584X012
Fluoroelastomer 13A1584X022
50 Backup Ring, stainless steel 18B3446X012
55 Restriction 1D483514012
56 Baffle Plate 11B4292X012
• Replace the Type 161Y and 161YM Mounting Parts Heading on page 38 with the following:
Type 161AY and 161AYM Mounting Parts (figure 24)