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

business of Emerson Process Management.

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.

Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson 

Process Management product remains solely with the purchaser.

©Emerson Process Management Regulator Technologies, Inc., 1962, 2009; All Rights Reserved

industrial Regulators

Emerson Process Management 

Regulator Technologies, inc.

USA - Headquarters

McKinney, Texas 75069-1872 USA

Tel: 1-800-558-5853

Outside U.S. 1-972-548-3574
Asia-Pacific

Shanghai, China 201206

Tel: +86 21 2892 9000 
Europe

Bologna, Italy 40013

Tel: +39 051 4190611
Middle East and Africa

Dubai, United Arab Emirates

Tel: +971 4811 8100

natural gas Technologies

Emerson Process Management

Regulator Technologies, inc.

USA - Headquarters

McKinney, Texas 75069-1872 USA

Tel: 1-800-558-5853

Outside U.S. 1-972-548-3574
Asia-Pacific

Singapore, Singapore 128461

Tel: +65 6777 8211
Europe

Bologna, Italy 40013

Tel: +39 051 4190611

Gallardon, France 28320

Tel: +33 (0)2 37 33 47 00

TESCOM

Emerson Process Management

Tescom Corporation

USA - Headquarters

Elk River, Minnesota 55330-2445 USA

Tel: 1-763-241-3238
Europe

Selmsdorf, Germany 23923

Tel: +49 (0) 38823 31 0

For further information visit www.emersonprocess.com/regulators

Types 98LD and 98HD

Key 11 Relief Valve Spring

BODY SiZE,

nPS (Dn)

TYPE 98LD RangE

TYPE 98HD RangE

COLOR CODE

PaRT nUMBER

Psi

bar

Psi

bar

1/4

2 to 7

6 to 14

12 to 25

20 to 38

0,14 to 0,48

0,41 to 0,97

0,83 to 1,7

1,4to 2,6

15 to 35

25 to 75

70 to 140

130 to 200

1,0 to 2,4

1,7 to 5,2

4,8 to 9,7

9,0 to 13,8

Yellow

Green

Red

Blue

1E392527022

1E392627012

1E392727142

1L346127142

1/2 (15)

2 to 7

6 to 14

12 to 25

20 to 38

0,14 to 0,48

0,41 to 0,97

0,83 to 1,7

1,4 to 2,6

15 to 35

25 to 75

70 to 140

130 to 200

1,0 to 2,4

1,7 to 5,2

4,8 to 9,7

9,0 to 13,8

Yellow

Green

Red

Blue

1E395627022

1D7455T0012

1E395727192

1L380027142

3/4 and 1 

(20 and 25)

2 to 7

6 to 14

12 to 25

20 to 38

0,14 to 0,48

0,41 to 0,97

0,83 to 1,7

1,4 to 2,6

15 to 35

25 to 75

70 to 140

130 to 200

1,0 to 2,4

1,7 to 5,2

4,8 to 9,7

9,0 to 13,8

Yellow

Green

Red

Blue

1E398927022

1E399027142

1E399127162

1L380127092

1-1/2 and 2 

(40 and 50)

- - - -

- - - -

- - - -

- - - -

- - - -

- - - -

5 to 35

20 to 65

50 to 100

80 to 170

0,34 to 2,4

1,4 to 4,5

3,4 to 6,9

5,5 to 11,7

Dark Gray

Light Blue

Lighy Gray

Black

1E792327092

1E795327082

1E794527082

1P788827082

Key 6 Pusher Post

BODY SiZE, 

nPS (Dn)

METaL TO METaL

ELaSTOMER SEaT

naCE

For Other Than Sour gas 

Corrosion Resistance applications

416 SST

316 SST

416 SST

316 SST

1/4

1/2 (15)

3/4, 1 (20, 25)

1L345735132

1L344535132

1L343935132

1L345735072

1L344535072

1L343935072

1L345635072

1L344235072

1L343835072

1L345635132

1L344235132

1L343835132

1L345635072

1L344235072

1L343835072

Type 98HD only

1-1/2, 2 (40, 50)

1P788335132

1P788335072

1P788435072

1P788435132

1P788435072

Summary of Contents for Fisher 98HD

Page 1: ...es Inc instructions If a leak develops or if the outlet continually vents gas service to the unit may be required Failure to correct trouble could result in a hazardous condition Only a qualified person must install or service the unit Installation operation and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation Either condition may res...

Page 2: ...Trims To 315 F 157 C To 406 F 208 C 98LD 98HD 125 8 62 300 20 7 50 3 4 250 17 2 50 3 4 50 3 4 Maximum Temperature Ranges of Diaphragm and Seat Materials 1 4 material temperature range F C Metal All Nitrile NBR Neoprene CR Fluorocarbon FKM Ethylenepropylene EPDM Polytetrafluoroethylene PTFE PerFluorocarbon FKM FFKM 40 to 450 F 40 to 232 C 20 to 180 F 29 to 82 C 40 to 180 F 40 to 82 C 0 to 300 F 18 ...

Page 3: ...s are used to maintain a differential between the controlled pressure and loading pressure of a system The spring setting determines the differential The Types 98LD and 98HD can also be pressure loaded to remotely change the relief setpoint The relief valve responds to both controlled pressure and loading pressure and opens or closes as these pressures change If the loading pressure increases pres...

Page 4: ...6 167 6 56 167 1 All springs may be backed off to 0 psig 0 bar However highest capacities and best performances are obtained by using these springs in their recommended ranges Installation Unbox and inspect the valve Remove pipe scale and other foreign material from the connecting pipeline Apply a suitable pipe compound to the male threads The relief valve can be installed in any position as long ...

Page 5: ...constructions Use pressure gauges to monitor inlet pressure outlet pressure and any intermediate pressure during startup With proper installation completed and system equipment properly adjusted close any block and vent valves and back out the adjusting screw by turning it counterclockwise or by turning the handwheel in the same manner Slowly open the following valves in this order loading supply ...

Page 6: ...of heavy plate glass b Take the valve plug or orifice and move it in a Figure 8 motion on the lapping compound Do not allow the part to tip or rock since this would round the corners c Repeat step b for each part using an 800 grit or 1000 grit silicon carbide or aluminum oxide lapping compound d Wash away all traces of the lapping compound To help prevent scratching the seating surfaces a light co...

Page 7: ...in the unit so that they are facing toward the assembler toward the spring except only when one metal diaphragm is being used then the raised surface should be facing down towards the body See Figures 4 and 5 as references 9 Put the diaphragm assembly into position in the body 10 Replace the packing as instructed below Table 2 Torque Specifications body size NPS DN spring case Foot pound N m orifi...

Page 8: ...NPS 1 4 body R98LX000042 NPS 1 2 DN 15 body R98LX000052 NPS 3 4 and 1 DN 20 and 25 bodies R98LX000062 1 Body See following table 2 Spring Case Type 98HD Steel NPS 1 4 body 2L443222012 NPS 1 2 DN 15 body 2L324122012 NPS 3 4 and 1 DN 20 and 25 bodies 3E408822012 316 SST NPS 1 4 body 2L443233092 NPS 1 2 DN 15 body 2L3241X0012 NPS 3 4 and 1 DN 20 and 25 bodies 3E4088X00A2 Type 98LD Steel NPS 1 4 body ...

Page 9: ...24052 NPS 1 2 DN 15 body 10 required 1A381624052 NPS 3 4 and 1 DN 20 and 25 bodies 12 required 1A336924052 Type 98HD NPS 1 4 body 6 required 1A391724052 NPS 1 2 DN 15 body 8 required 1A352624052 NPS 3 4 and 1 DN 20 and 25 bodies 8 required 1A341824052 18 Drive Screw SST 2 required not shown 1A368228982 19 Diaphragm Gasket Use with 302 SST diaphragm Type 98LD NPS 1 4 body 2 required 1E394004022 NPS...

Page 10: ...8H only 11A9809X022 33 Adjusting Screw SST NPS 1 4 body 1L449535232 NPS 1 2 DN 15 body 1L449735232 NPS 3 4 and 1 DN 20 and 25 bodies 1L324435232 NPS 1 1 2 and 2 DN 40 and 50 bodies Type 98H only 21A9808X012 Recommended spare part Key Description Part Number 34 Packing Follower NPS 1 4 body 316 SST 1K885035072 NPS 1 2 3 4 and 1 DN 15 20 and 25 bodies 1K884924092 35 Packing Box Nut Steel zinc plated...

Page 11: ...04X022 1V4541X0022 2 50 10A0192X012 10A4986X012 10A0192X022 10A4986X052 Key 1 Regulator Body SWE body size NPS DN type 98hd body material type 98ld body material Steel Stainless Steel Steel Stainless Steel 1 2 15 2L9673X0022 2L9673X0012 2U8059X0012 2U8059X0022 3 4 20 2N443922012 2N4439X0012 2N4463X0012 2N4463X0022 1 25 2N414422012 2N4144X0012 2N445222012 2N4452X0012 1 1 2 40 3V4542X0012 3V4542X002...

Page 12: ...ance 28320 Tel 33 0 2 37 33 47 00 TESCOM Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445 USA Tel 1 763 241 3238 Europe Selmsdorf Germany 23923 Tel 49 0 38823 31 0 For further information visit www emersonprocess com regulators Types 98LD and 98HD Key 11 Relief Valve Spring body size NPS DN Type 98ld range TYPE 98hd range color code part number Psi bar ...

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