Type 627F
9
Diaphragm Parts
1. Remove the closing cap (key 28), loosen the locknut
(key 11), and back out the adjusting screw (key 10)
to remove control spring (key 9) compression.
2. Remove the machine screws (key 12) and
separate the spring case (key 2) from the body
assembly (key 1). Remove the control spring
(key 9).
3. Remove the diaphragm assembly (key 7) and
inspect the removed parts and replace as
necessary. Make sure the restriction hole (key 44)
is free from debris.
4. Install the diaphragm assembly (key 7) and push
down on it to see if the inner valve assembly
(key 4) strokes smoothly and approximately
1/16-inch / 2.0 mm.
Note
In step 5, if installing a control spring of
a different range from the one that was
removed, be sure to replace the spring
range originally appearing on the spring
case with the new spring range.
5. Stack the control spring (key 9) and control spring
seat (key 8) onto the diaphragm assembly (key 7).
Sparingly apply lubricant to the control spring seat.
6. Install the spring case (key 2) on the body (key 1)
with the vent (key 35) oriented to prevent clogging
or entrance of moisture. Install the machine
screws (key 12) and using a crisscross pattern,
torque them to 3 foot-pounds / 4.1 N•m.
7. When all Maintenance is complete, refer to the
Startup and Adjustment section to put the
regulator back into operation, and adjust the
pressure setting. Tighten the locknut (key 11),
and install the closing cap (key 28).
Parts Ordering
When corresponding with your local Sales Office or
representative about this regulator, reference the type
number which is found on the nameplate.
When ordering replacement parts, reference the key
number of each needed part as found in the following
parts list. Separate kit containing all recommended
spare parts is available.
Parts List
Type 627F Main Regulator (Figure 3)
Key Description
Part Number
Type 627F Parts Kit (includes keys 4, 7, 9,
11, 12, 13, 23, 55, and 63)
Aluminum or Ductile iron casing
R627FX00A12
Stainless steel casing
R627FX00S12
1
Body
Ductile iron
3/4 NPT
12B3307X012
1 NPT
12B3307X022
2 NPT
12B3308X012
Steel
3/4 NPT
30B3050X012
1 NPT
30B3051X012
2 NPT
30B7452X012
Steel, CL150 RF Flanged
NPS 1 / DN 25
43B8656X022
NPS 2 / DN 50
44B0666X012
Steel, CL300 RF Flanged
NPS 1 / DN 25
41B8978X012
NPS 2 / DN 50
41B8080X012
Steel, CL600 RF Flanged
NPS 1 / DN 25
40B6754X012
NPS 2 / DN 50
40B6756X012
Steel, PN 16/25/40 RF Flanged
NPS 1 / DN 25
44B0386X012
NPS 2 / DN 50
44B3342X012
2* Orifice
Aluminum
3/8 x 1/8 inch / 9.5 x 3.2 mm
12B4986X012
3/8 x 1/4 inch / 9.5 x 6.4 mm
12B4986X022
3/8 inch / 9.5 mm
0B042209012
1/2 inch / 13 mm
1A928809012
Stainless steel
3/8 x 1/8 inch / 9.5 x 3.2 mm
12B4986X032
3/8 x 1/4 inch / 9.5 x 6.4 mm
12B4986X042
3/8 inch / 9.5 mm
0B042235032
1/2 inch / 13 mm
1A928835032
3
Cap Screw (2 required)
Aluminum
1A352524052
Ductile iron
1A560724052
Steel
1A560724052
4* Diaphragm Case O-Ring, Nitrile (NBR)
17A2325X022
5
Diaphragm Case
Aluminum
40B3084X012
Ductile iron
30B3053X012
Steel
30B3104X012
6
Boost Body, Aluminum
22B4767X012
7* O-Ring, Nitrile (NBR)
1E547706992
8
Stem Guide, Powdered metal
20B3061X012
9* Disk Assembly (for all orifice sizes)
Aluminum holder and Nitrile (NBR) disk
1C4248X0212
303 Stainless steel holder and Nitrile (NBR) disk 1C4248X0202
10 Stem, 416 Stainless steel
10B3059X012
11* Stem O-Ring, Nitrile (NBR)
1D687506992
12* Stem Backup Ring, Polytetrafluoroethylene
(PTFE) (2 required)
1K786806992
13 Hairpin Clip, Stainless steel
10B3058X012
14 Drive Pin, Plated steel
1H3671X0012
15 Lever, Plated steel
20B3063X012
16 Lever Retainer, Plated steel
30B3097X012
17 Lever Pin, Stainless steel
10B3083X012
18 Lever Cap Screw, Plated steel (2 required)
10B7454X012
19A Pusher Post, Aluminum
20B3064X012
19B Drive Pin, Stainless steel
14B0382X012
*Recommended Spare Parts
