Emerson 98 Installation Guide
Installation Guide
English – May 2002
Type 98HH
Introduction
This installation guide provides instructions for
installation, startup, and adjustment. To receive a
copy of the instruction manual, contact your local
Fisher Sales Ofce or Sales Representative or view
a copy at www.emersonprocess.com/regulators. For
further information refer to: Type 98HH Instruction
Manual (form 1930, D100706X012).
P.E.D. Category
This product may be used as a pressure 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.
PRODUCT SIZE CATEGORIES FLUID TYPE
DN 6 to 25 (1/4 to 1-inch) SEP 1
Specications
Temperature Capabilities
(1)
Nitrile Parts: -29 to 93°C (-20 to 200°F)
Neoprene Parts: -40 to 66°C (-40 to 150°F)
Fluoroelastomer Parts:
-18 to 149°C (0 to 300°F)
Metal Diaphragm and Seat:
Cast Iron Body and Spring Case:
-40 to 208°C (-40 to 406°F)
Steel Body and Spring Case:
-29 to 232°C (-20 to 450°F)
Stainless Steel Body and Spring Case:
-40 to 232°C (-40 to 450°F)
Installation
WARNING
!
Only qualied personnel should install
or service a backpressure regulator.
Backpressure regulators should be
installed, operated, and maintained
in accordance with international and
applicable codes and regulations, and
Fisher instructions.
End Connection Style
NPT, socket weld, or ANSI anged-DIN anged 356-mm face-to-face (14-inches face-to-face)
Body Sizes
DN 6, 15, 20, and 25 (1/4, 1/2, 3/4, and 1-inch)
Maximum Inlet Pressures
(1)(2)
(Set Pressure
Plus Buildup)
Steel (WCB) or Stainless Steel Spring Case all
Trims to 66°C
(3)
(150°F): 27,6 bar (400 psig)
Cast Iron Spring Case:
All Trims to 66°C
(4)
(150°F): 27,6 bar (400 psig)
Metal Trims to 157°C (315°F): 20,7 bar (300 psig)
Metal Trims to 208°C (406°F): 17,2 bar (250 psig)
Relief Pressure Ranges
(1)
10,3 to 25,9 bar (150 to 375 psig)
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4
If using a backpressure regulator on a
hazardous or ammable uid service,
personal injury and property damage
could occur due to re or explosion of
vented uid that may have accumulated.
To prevent such injury or damage,
provide piping or tubing to vent the
uid to a safe, well-ventilated area or
containment vessel. Also, when venting
a hazardous uid, the piping or tubing
should be located far enough away
from any buildings or windows so to
not create a further hazard, and the vent
opening should be protected against
anything that could clog it.
Personal injury, equipment damage,
or leakage due to escaping uid
or bursting of pressure-containing
parts may result if this backpressure
regulator is overpressured or is
installed where service conditions
could exceed the limits given in the
1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
2. Pressure setting plus maximum allowable buildup over setting.
3. Or uoroelastomer trims to 149°C (300°F) or metal trims to 232°C (450°F).
4. Or uoroelastomer trims to 149°C (300°F).
R
www.emersonprocess.com/regulators
D100706XENG
Type 98HH
Specications 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
backpressure regulator could result in
personal injury and property damage
due to escaping uid. To avoid
such injury and damage, install the
backpressure regulator in a
safe location.
Clean out all pipelines before installation of the
backpressure regulator and check to be sure the
backpressure regulator has not been damaged or
has collected foreign material during shipping. For
NPT bodies, apply pipe compound to the male
pipe threads. For anged bodies, use suitable line
gaskets and approved piping and bolting practices.
Install the backpressure regulator in any position
desired, unless otherwise specied, but be sure ow
through the body is in the direction indicated by the
arrow on the body.
Startup
The backpressure 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 backpressure regulators
properly adjusted, slowly open the upstream and
downstream shutoff valves (if applicable).
Adjustment
To change the outlet pressure, remove 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 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 backpressure regulator from all
pressure before attempting disassembly.
Note
It is important that the backpressure
regulator be installed so that the
vent hole in the spring case is
unobstructed at all times. For outdoor
installations, the backpressure
regulator should be located away
from vehicular trafc and positioned
so that water, ice, and other foreign
materials cannot enter the spring
case through the vent. Avoid placing
the backpressure regulator beneath
eaves or downspouts, and be sure it
is above the probable snow level.
Overpressure
Maximum inlet pressures depend upon body
materials and temperatures. Refer to the nameplate
for the maximum inlet pressure of the valve. The
valve should be inspected for damage after any
overpressure condition. Fisher backpressure
regulators are NOT ASME safety relief valves.
Parts List
Key Description
1 Body
2 Spring Case
3 Orice
4 Valve Plug
5 Valve Plug Guide
6 Pusher Post
7 Washer
8 Lower Spring Seat
9 Upper Spring Seat
10 Gasket
11 Relief Valve Spring
12 Diaphragm
15 Adjusting Screw
16 Cap Screw
17 Jam Nut
18 Drive Screw
19 Diaphragm Gasket
21 O-Ring Retainer
22 O-Ring
23 Lockwasher
24 Machine Screw
26 Locknut
2
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