Emerson Fisher 92C 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 92C Instruction Manual, D100255X012.
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 15, 20 and 25 / NPS 1/2, 3/4 and 1 SEP 1
Specifications
Body Sizes and End Connection Style
See Table 1
Maximum Allowable Inlet and Pilot
Supply Pressures(1)
Grey Cast Iron: 17.2 bar / 250 psig
Steel and Stainless Steel: 20.7 bar / 300 psig
Regulator Pressure Drops
Minimum: 1.0 bar / 15 psig
Maximum Operating: 10.3 bar / 300 psig for
outlet pressure settings equal to or below 3.4 bar /
50 psig; 13.8 bar / 200 psig for outlet pressure
settings above 3.4 bar / 50 psig
Maximum Emergency:
Grey Cast Iron Construction: 17.2 bar / 250 psig
Steel and Stainless Steel Construction: 20.7 bar /
300 psig
Outlet Pressure Range(1)
See Table 2
Maximum Outlet Pressures(1)
Maximum Operating Outlet Pressure: 10.3 bar /
150 psig
Maximum Emergency Outlet (Casing) Pressure:
Grey Cast Iron Construction: 17.2 bar / 250 psig
Steel and Stainless Steel Construction: 20.7 bar /
300 psig
Loading Pressure For Pressure-Loaded Regulator(1)
Maximum allowable loading pressure is 17.2 bar /
250 psig for grey cast iron construction and 20.7 bar /
300 psig for steel or stainless steel construction; the
maximum allowable diaphragm differential pressure
of 10.3 bar / 150 psig for grey cast iron, steel and
stainless steel constructions must not be exceeded.
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive.
Maximum Temperature Capablities(1)
Grey Cast Iron: 208°C / 406°F
Steel and Stainless Steel: 260°C / 500°F
Optional High-Temperature Steel or Stainless
Steel Body: 343°C / 650°F
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.
1. The pressure/temperature limits in this installation guide or any applicable standard limitation should not be exceeded.
Type 92C
Installation Guide
D100255X014
English – December 2012

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.
Note
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all times.
For outdoor installations, the regulator
should be located away from vehicular
trafc and positioned so that water, ice
and other foreign materials cannot enter
the spring case through the vent. Avoid
placing the regulator beneath eaves or
downspouts, and be sure it is above the
probable snow level.
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.
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.
Parts List
Regulator
Key Description
1 Regulator Body Assembly
with bushing
2 Diaphragm Flange
3 Orice
4 Valve Plug
5 Valve Plug Guide
6 Stem Guide Bushing
7 Valve Plug Spring
8* Diaphragm
9* Diaphragm Gasket
10 Pitot Tube
11 Stem Assembly
12 Cap Screw
14 Drive Screw
15 Diaphragm Ring Regulator
*Recommended spare part.
Type 6392 Pilot
Key Description
1 Pilot Body
2 Spring Case
3 Orice
4 Valve Plug
5 Valve Plug Guide
6 Stem Assembly
7 Diaphragm
8* Diaphragm Gasket
9 Lower Spring Seat
10 Stem Guide Bushing
11 Valve Plug Spring
12 Strainer Screen
13 Control Spring
14 Upper Spring Seat
15 Jam Nut
16 Adjusting Screw
17 Cap Screw
26 Valve Plug Cap
Table 1. Body Sizes and End Connection Styles
SIZE BODY MATERIAL
Grey Cast Iron Steel or CF8M Stainless Steel
DN 15, 20 or 25 / NPS 1/2, 3/4 or 1 NPT NPT, CL150RF, CL300RF or PN 16/25/40
Table 2. Outlet Pressure Ranges
SPRING USAGE OUTLET PRESSURE RANGE SPRING COLOR
bar psig
Standard use up to
260°C / 500°F
0.34 to 4.8 5 to 70 Green
1.4 to 10.3 20 to 150 Red
High-pressure and/or
High temperature over 250°C / 500°F
1.0 to 6.9 15 to 100 Unpainted
5.5 to 17.2 80 to 250 Unpainted
Type 92C
2

9
15
14
13
9
12
10
8
1
4
7
5
2
9
6
3
S
S
11
2
9
8
STEEL/STAINLESS STEEL CONSTRUCTION
GREY CAST IRON CONSTRUCTION
26A1538-A
26A1536-A
Figure 1. Type 92C Steam Regulator Assembly
APPLY SEALANT:
S = ANTI-SEIZE COMPOUND
16A1520-B
Figure 2. Type 6392 Pilot Assembly
APPLY LUBRICANT/SEALANT:
L = ANTI-SEIZE LUBRICANT
S = ANTI-SEIZE COMPOUND
16
14
13
17
10
12
2
15
18
19
26
11
9
8
4
5
7
1
6
3
L
L
S
Type 92C
3

Type 92C
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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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D100255X014 © 2002, 2018 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 10/18.
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