Emerson Fisher 92B User manual

Introduction
This installation guide provides instructions for installation,
startup and adjustment. To receive a copy of the
instruction manual, contact your local Sales Office or view
a copy at www.fisher.com. For further information refer to:
Type 92B Instruction Manual, D100703X012.
PED Categories
This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive categories. It may also be used outside of the
Pressure Equipment Directive using sound engineering
practice (SEP) per table below. For information on the
current PED revision see Bulletin: D103053X012.
PRODUCT SIZE CATEGORIES FLUID TYPE
DN 25 / NPS 1 SEP 1
DN 40, 50, 80, 100 / NPS 1-1/2, 2, 3, 4 II
Specifications
Available Configurations
Pilot-operated, globe-style pressure reducing
valve with post guiding and ow-to-close valve
plug action
Body Size and End Connection Style
See Table 1
Maximum Inlet Pressures and Temperatures(1)
See Table 3
Maximum Outlet (Casing) Pressure
Cast Iron: 10.3 bar / 150 psig or body rating limit,
whichever is lower
Steel/Stainless steel: 20.7 bar / 300 psig or body
rating limit, whichever is lower
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive.
Outlet Pressure Ranges(1)
See Table 2
Minimum Di󰀨erential Pressure Required for
Full Stroke(1)
1.4 bar / 20 psig with stainless steel
spring; 0.69 bar / 10 psig with Inconel®spring
Installation
!
WARNING
Only qualied personnel should install
or service a regulator. Regulators
should be installed, operated and
maintained in accordance with
international and applicable codes
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If the regulator vents uid or a leak
develops in the system, it indicates that
service is required. Failure to take the
regulator out of service immediately may
create a hazardous condition.
Personal injury, equipment damage or
leakage due to escaping uid or bursting
of pressure-containing parts may result
if this regulator is overpressured or
is installed where service conditions
could exceed the limits given in the
Specications section, or where
conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation or standard) to prevent
service conditions from exceeding limits.
Additionally, physical damage to the
regulator could result in personal injury
and property damage due to escaping
uid. To avoid such injury and damage,
install the regulator in a safe location.
Clean out all pipelines before installation of the
regulator and check to be sure the regulator has not
been damaged or has collected foreign material during
shipping. For NPT bodies, apply pipe compound to the
external pipe threads. For anged bodies, use suitable
line gaskets and approved piping and bolting practices.
Install the regulator in any position desired, unless
otherwise specied, but be sure ow through the body
is in the direction indicated by the arrow on the body.
Inconel®is a trademark owned by Special Metals Corporation.
1. The pressure/temperature limits in this installation guide or any applicable standard limitation should not be exceeded.
Type 92B
Installation Guide
D100703X014
English – October 2014

Table 2. Outlet Pressure Ranges
CAUTION
Be sure to install Type 92B pilot above
the pipeline with the adjusting screw
pointing up and the control line sloped
at a downward pitch to the main line to
ensure proper condensate drainage.
Overpressure Protection
The recommended pressure limitations are stamped
on the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
Regular operation below the maximum pressure
limitations does not preclude the possibility of damage
from external sources or debris in the line. The
regulator should be inspected for damage after any
overpressure condition.
Startup
The regulator is factory set at approximately
the midpoint of the spring range or the pressure
requested, so an initial adjustment may be required
to give the desired results. With proper installation
completed and relief valves properly adjusted, slowly
open the upstream and downstream shutoff valves.
!
WARNING
Failure to remove accumulated
condensate may result in severe
condensation induced water hammer
which may result in personal injury
or death.
Adjustment
To change the set pressure, remove the closing
cap or loosen the locknut and turn the adjusting
screw clockwise to increase outlet pressure or
counterclockwise to decrease pressure. Monitor
the outlet pressure with a test gauge during the
adjustment. Replace the closing cap or tighten the
locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
!
WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate
the regulator from all pressure before
attempting disassembly.
Table 1. Body Sizes and End Connection Styles
BODY SIZE END CONNECTION STYLE
DN NPS Cast Iron Steel or Stainless Steel
25 1 NPT
NPT, SWE(1), CL150 RF, CL300 RF and PN 16/25/40 RF
40, 50 1-1/2, 2 NPT, CL125 FF and CL250 RF
80, 100 3, 4 CL125 FF and CL250 RF CL150 RF, CL300 RF, PN 16 RF and PN 25/40 RF
1. Available in steel bodies only.
PILOT TYPE
OUTLET PRESSURE
bar psig
Low Pressure
0.14 to 0.41
0.34 to 1.0
0.90 to 1.7
2 to 6
5 to 15
13 to 25
High Pressure
1.0 to 2.1
1.7 to 5.2
4.8 to 10.3
15 to 30
25 to 75
70 to 150
High Temperature 1.0 to 6.9
5.5 to 17.2
15 to 100
80 to 250
Type 92B
2

Table 3. Maximum Inlet Pressures and Temperatures
Parts List
Type 92B Main Valve
Key Description
19 Drive Screw
20 Warning Label (Cast iron only) (not shown)
21 Nameplate
51 Valve Body Assembly
52 Bottom Flange Assembly
53 Guide Bushing
54* Gasket
55 Cap Screw, For Cast iron and Steel bodies
56 Valve Plug
BODY
MATERIAL END CONNECTION MAXIMUM INLET PRESSURE MAXIMUM TEMPERATURE
bar psig °C °F
Cast Iron
NPT 17.2 250 208 406
CL125 FF 8.6 125 178 353
CL250 FF 17.2 250 208 406
Steel
NPT, SWE 20.7 300 232 450
CL150 RF 12.8 185 232 450
CL300 RF 20.7 300 316(1) 600(1)
PN 16/25/40 (DN 25, 40, 50 and 80 /
NPS 1, 1-1/2, 2 and 3) 20.7 300 316(1) 600(1)
PN 16 (DN 100 / NPS 4) 12.8 185 232 450
PN 25/40 (DN 100 / NPS 4) 20.7 300 316(1) 600(1)
Stainless Steel
NPT 20.7 300 232 450
CL150 RF 12.1 175 232 450
CL300 RF 20.7 300 316(1) 600(1)
PN 16/25/40 (DN 25, 40, 50 and 80 /
NPS 1, 1-1/2, 2 and 3) 20.7 300 316(1) 600(1)
PN 16 (DN 80 and 100 / NPS 3 and 4) 12.1 175 232 450
PN 25/40 (DN 80 and 100 / NPS 3 and 4) 20.7 300 316(1) 600(1)
1. 232°C / 450°F with standard seat ring, 316°C / 600°F with seal weld option.
30A6348-B1A
Figure 1. Type 92B Main Valve Assembly
*Recommended spare part.
Key Description
57 Spring
58* Seat Ring
59 Diaphragm Head
60* Diaphragm
61 Bleed Fitting
62 Diaphragm Case
63 Cap Screw
64 Hex Nut
69 Pipe Plug
63 61
21
59
56
58
57
52
62
60
64
53
51
54
55
Type 92B
3

Type 92B Pilot
Key Description
1 Pilot Valve Body
2 Valve Guide
3 Valve Spring
4* Valve Plug
5* Orice
7 Valve Stem
8 Bellows Retainer
9 Bellows
10* Diaphragm
11 Lower Spring Seat
12 Spring
13 Upper Spring Seat
14 Spring Case
15 Set Screw
16 Hex Nut
17 Cap Screw
18* Diaphragm Gasket
19 Drive Screw
20 Nameplate
22 Pipe Nipple
24 Diaphragm Plate Assembly
34 Machine Screw
74 Pipe Plug
75 Check Valve Assembly
77 Screen
*Recommended spare part.
BF9827-G
Figure 2. High-Pressure Pilot Assembly
CJ8998-E
Figure 3. Low-Pressure Pilot Assembly
12 14
15
16
22
74
75
20
19
13
18
9
5
3
4
11
17
10
1
8
7
2
77
15
16
12
14
10
18
9
7
1 2 3 4
5
8
74
24
17
77
20
19
13
75
22
Type 92B
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Emerson Automation Solutions
For further information on the current
PED revision see Bulletin: D103053X012
or scan the QR code.
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D100703X014 © 2004, 2018 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 09/18.
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