Emerson 92C Installation Guide

Installation Guide
English – May 2002

Type 92C

Introduction

This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual, contact your local Fisher Sales
Office or Sales Representative or view a copy at
www.FISHERregulators.com. For further information refer to:

Type 92C Instruction Manual, form 5135, D100255X012.

P.E.D. Categories

This product may be used as a safety accessory with pres­sure equipment in the following Pressure Equipment Di­rective 97/23/EC categories. It may also be used outside
of the Pressure Equipment Directive using sound engi­neering practice (SEP) per table below.

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Specifications

Body Sizes and End Connection Style

DN 15, 20, and 25 (1/2, 3/4, and 1-inch) NPT screwed

Maximum Allowable Inlet and Pilot Supply
Pressures

Regulator Pressure Drops

Outlet Control Pressure Range

Maximum Outlet Pressures

Loading Pressure For Pressure-Loaded Regulator

Proof Test Pressure

(1)

Cast Iron:
Steel:

Minimum:
Maximum Operating:

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:

bar (250 psig); Steel construction, 20,7 bar (300 psig)

0,3 to 4,8 bar (5 to 70 psig) with green pilot control
spring, or 1,4 to 10,3 bar (20 to 150 psig) with red pilot
control spring

Maximum Operating Outlet Pressure:
Maximum Emergency Outlet (Casing) Pressure:

Iron construction, 17,2 bar (250 psig); Steel construction,
20,7 bar (300 psig)

Maximum allowable loading pressure is 17,2 bar (250
psig) for cast iron construction and 20,7 bar (300 psig) for
steel construction; the maximum allowable diaphragm
differential pressure of 10,3 bar (150 psig) for cast iron
and steel constructions must not be exceeded.

All Pressure Retaining Components have been proof
tested per Directive 97/23/EC - Annex 1, Section 7.4

17,2 bar (250 psig)

20,7 bar (300 psig)

(1)

1,0 bar (15 psig)

10,3 bar (150 psig) for outlet

Cast Iron construction, 17,2

(1)

(1)

10,3 bar (150 psig)

Cast

(1)

Maximum Temperature Capabilities

Cast Iron:
Steel:

208°C (406°F)

260°C (500°F)

(1)

Installation

Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.

If the regulator vents fluid 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 fluid or bursting of pressure­containing parts may result if this regulator is
overpressured or is installed where service
conditions could exceed the limits given in the
Specifications section, or where conditions
exceed any ratings of the adjacent piping or piping
connections.

To avoid such injury or damage, provide pressure­relieving 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 fluid. 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 male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow 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 traffic 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.

1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.

www.FISHERregulators.com

D100255XENG

Type 92C

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.

Regulator 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 outlet 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)

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 Seat Ring
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
13 Nameplate
14 Drive Screw
15 Diaphragm Ring

Type 6392 Pilot

Key Description

1 Pilot Body
2 Spring Case
3 Seat Ring
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
18 Nameplate
19 Drive Screw
26 Valve Plug Cap

STEEL OR STAINLESS STEEL CONSTRUCTION

26A1536_A

CAST IRON CONSTRUCTION

16A1520_B

Figure 2. Type 6392 Pilot

Figure 1. Type 92C Regulator

©Fis her C ontro ls Inte rnati onal, I nc., 2002; All R ights Rese rved

Fisher and Fisher Regulators are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark and service mark of Emerson Electric Co.
All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express
or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

For information, contact Fisher Controls, International:

Within USA [phone] – Outside USA [phone]
France – (33) 23-733-4700
Singapore – (65) 770-8320
Mexico – (52) 57-28-0888

Printed in U.S.A.

www.FISHERregulators.com