Data Sheet

ManualsBrandsEmerson ManualsRegulators and Relief ValvesEmerson 98 Series Relief Valve or Backpressure Regulator

Bulletin 71.4:98

November 2009

D100153X012

www.sherregulators.com

Figure 1. Typical 98 Relief Valves

W6155

TYPE 98H

W6158

TYPE 98HD

W6157

TYPE 98LD

W6156

TYPE 98L

Introduction

The 98 Series (Figure 1) is used for backpressure

or relief applications in liquid, gas, air, and steam

service. The Types 98L, 98H, and 98HH are direct-

operated and spring-loaded. The Types 98LD and

98HD use additional pressure loading to maintain relief

differential pressures, backpressures or for remote

setpoint adjustment.

The Type 98HM is a direct-operated, spring to close

regulator for backpressure or relief applications in

liquid, gas, or steam service. The regulator requires

no external power to operate and features a sensing

line connection for sensing pressure externally from

the regulator. A seal washer for the set screw can be

included when applications require pressure loading

of the spring case (not available on NPS 1-1/2 and 2

bodies (DN 40 and 50)).

Using a Type 98HM as a relief valve does not

exclude the installation of an ASME certied

full ow valve as specied by local codes and

regulations or system design.

Features

• Versatility—Typical applications include

backpressure on pumps, maintaining differential

pressure across lubricated seals, steam header

pressure, fuel and oil lines, air supply systems,

pump bypass applications for API general and

special purpose lube and seal oil systems, relief

applications for ash tanks and accumulators, and

other process and industrial uses.

• Excellent Fluid Compatibility—Diaphragms come

in stainless steel, Monel

, Hastelloy

C, or elastomers,

and body is available in cast iron and steel as well as

stainless steel, Hastelloy

C, and Monel

. Corrosion-

resistant trims are available.

• Close, Stable Regulation—Diaphragm is isolated

from the main ow stream. Slotted valve plug and

pusher post assembly provides positive guiding for

improved shutoff.

• Compact Design—Small size allows easy

installation in limited spaces.

98 Series Backpressure Regulators

and Relief Valves

Hastelloy

C is a mark owned by Haynes International, Inc.

Monel

is a mark owned by Special Metals Corporation.

Summary of content (36 pages)

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Bulletin 71.4:98 November 2009 98 Series Backpressure Regulators and Relief Valves W6155 TYPE 98H W6157 TYPE 98LD W6158 TYPE 98HD W6156 TYPE 98L Figure 1. Typical 98 Relief Valves Introduction Features The 98 Series (Figure 1) is used for backpressure or relief applications in liquid, gas, air, and steam service. The Types 98L, 98H, and 98HH are directoperated and spring-loaded.
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Bulletin 71.
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Bulletin 71.
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Bulletin 71.
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Bulletin 71.4:98 Type 98HM October 2008 Type 98HM Backpressure/Relief Valve METAL DIAPHRAGMS SPRING GASKET TO UPSTREAM SENSING LINE TO UPSTREAM SENSING LINE M1155 FOR TYPE 98HM WITH TWO METAL DIAPHRAGMS, ASSEMBLE DIAPHRAGM GASKETS UNDER AND ABOVE THE METAL DIAPHRAGMS AS SHOWN ABOVE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE M1155 TYPE 98HM Figure 2.
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Bulletin 71.4:98 and build-up. With this information, calculate a flow coefficient using the following: P1aSIN ) Q 3417 C1 ∆P P1a ) DEG Cg = Calculated Flow coefficient Q = Flow rate from tables (SCFH) P1a = Inlet pressure from table (set pressure and build-up) converted to absolute pressure G = Specific gravity T = Absolute temperature of gas at inlet degrees Rankine = °F + 460 P1 = Absolute inlet pressure, psia = psig + 14.
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Bulletin 71.4:98 Answer from Equation 2, Q = 14 500 SCFH (389 Nm3/h) rated capacity. Since this capacity is greater than the 13 200 SCFH (354 Nm3/h) required, the relief valve may be used or the calculation could be repeated to try for a smaller body size. Example 2.
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Bulletin 71.4:98 Table 1.
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Bulletin 71.4:98 Table 3. Water Relief Capacities in Gallons per Minute (l/min), Types 98L and 98LD with Elastomer Diaphragm NOMINAL BODY SIZES, NPS (DN) 1/4 1/2 (15) 3/4, 1 (20, 25) SPRING FLOW AT RELIEF RELIEF PRESSURE SETTING, SETTING, GPM PSIG (bar) (l/min) Part Number Color Code 1E392527022 Yellow 2 (0,14) 5 (0,34) 1E392627012 Green PRESSURE BUILD-UP OVER RELIEF SETTING, PSIG (bar) 2 (0,14) 4 (0,28) 6 (0,41) 8 (0,55) 10 (0,69) 15 (1,0) 20 (1,4) 25 (1,7) 30 (2,1) 0.7 (2,7) 0.
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Bulletin 71.4:98 Table 4. Water Relief Capacities in Gallons per Minute (l/min), Types 98L and 98LD with Metal Diaphragm NOMINAL BODY SIZES, NPS (DN) 1/4 1/2 (15) 3/4, 1 (20, 25) SPRING Part Number PRESSURE BUILD-UP OVER RELIEF SETTING, PSIG (bar) 2 (0,14) 4 (0,28) 6 (0,41) 8 (0,55) 10 (0,69) 15 (1,0) 20 (1,4) 25 (1,7) 30 (2,1) 1E392527022 Yellow 2 (0,14) 5 (0,34) 1E392627012 Green 10 (0,69) 2.2 (8,3) 3.4 (12,9) 4 (15,1) 4.5 (17,0) 4.8 (18,2) 5.1 (19,3) 5.5 (20,8) 6.0 (22,7) 6.
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Bulletin 71.4:98 Table 5. Steam Relief Capacities in Pounds per Hour (kg/h), Types 98L and 98LD with Metal Diaphragm Only SPRING NOMINAL BODY SIZES, NPS (DN) 1/4 1/2 (15) 3/4, 1 (20, 25) FLOW AT RELIEF RELIEF PRESSURE SETTING, SETTING, POUNDS/ PSIG (bar) HOUR (kg/h) Part Number Color Code 1E392527022 Yellow 2 (0,14) 5 (0,34) 1E392627012 Green PRESSURE BUILD-UP OVER RELIEF SETTING, PSIG (bar) 2 (0,14) 4 (0,28) 6 (0,41) 8 (0,55) 10 (0,69) 15 (1,0) 20 (1,4) 25 (1,7) 30 (2,1) 7.5 (3,4) 7.
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Bulletin 71.4:98 Table 6.
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Bulletin 71.4:98 Table 7.
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Bulletin 71.4:98 Table 8. Water Relief Capacities in Gallons per Minute (l/min), Types 98H and 98HD with Elastomer Diaphragm NOMINAL BODY SIZES, NPS (DN) SPRING Part Number 1E392527022 1E392627012 Color Code 1L346127142 1E395627022 1D7455T0012 1L380027142 1E398927022 7 (0,48) 10 (0,69) 15 (1,0) 20 (1,4) 30 (2,1) 50 (3,4) 75 (5,2) 100 (6,9) Yellow 3.2 (12,1) 5 (18,9) 6.2 (23,5) 4 (15,1) 5.6 (21,2) 6.6 (25,0) 4.2 (15,9) 6.3 (23,8) 7.6 (28,8) 7.2 (27,3) 7.3 (27,6) 8 (30,3) 7.4 (28,0) 7.
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Bulletin 71.4:98 Table 8. Water Relief Capacities in Gallons per Minute (l/min), Types 98H and 98HD with Elastomer Diaphragm (continued) NOMINAL BODY SIZES, NPS (DN) SPRING Part Number 1E399127162 Color Code 1E792327092 1E795327082 1P788827082 5 (0,34) 7 (0,48) 10 (0,69) 15 (1,0) 20 (1,4) 30 (2,1) 50 (3,4) 75 (5,2) 100 (6,9) Red 1.3 (4,9) 1.3 (4,9) 1.3 (4,9) 19 (71,9) 22 (83,3) 27 (102) 25 (94,6) 29 (110) 34.5 (131) 32 (121) 35 (132) 42 (159) 37 (140) 43 (163) 50.5 (191) 41 (155) 48.
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Bulletin 71.4:98 Table 9. Water Relief Capacities in Gallons per Minute (l/min), Types 98H and 98HD with Metal Diaphragm NOMINAL BODY SIZES, NPS (DN) SPRING Part Number 1E392527022 1E392627012 Color Code 1L346127142 1E395627022 1D7455T0012 1L380027142 1E398927022 7 (0,48) 10 (0,69) 15 (1,0) 20 (1,4) 30 (2,1) 40 (2,8) 50 (3,4) 75 (5,2) 100 (6,9) Yellow 2.9 (11,0) 3.4 (12,9) 4.6 (17,4) 3.4 (12,9) 3.8 (14,4) 4.4 (16,7) 4 (15,1) 4.6 (17,4) 5.2 (19,7) 4.9 (18,5) 5.5 (20,8) 6.2 (23,5) 5.
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Bulletin 71.4:98 Table 9. Water Relief Capacities in Gallons per Minute (l/min), Types 98H and 98HD with Metal Diaphragm (continued) SPRING NOMINAL BODY Color SIZES, Part Number Code NPS (DN) 1E399127162 1E792327092 1E795327082 1P788827082 5 (0,34) 7 (0,48) 10 (0,69) 15 (1,0) 20 (1,4) 30 (2,1) 40 (2,8) 50 (3,4) 75 (5,2) 100 (6,9) Red 1.3 (4,9) 1.3 (4,9) 1.3 (4,9) 7 (26,5) 9 (34,1) 11 (41,6) 10 (37,9) 12 (45,4) 14.5 (54,9) 14 (53,0) 18 (68,1) 20 (75,7) 20 (75,7) 25.
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Bulletin 71.4:98 Table 10.
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Bulletin 71.4:98 Table 10.
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Bulletin 71.4:98 Table 11.
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Bulletin 71.4:98 Table 11.
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Bulletin 71.4:98 Table 12.
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Bulletin 71.4:98 Table 12.
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Bulletin 71.4:98 Table 13.
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Bulletin 71.4:98 Table 14.
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Bulletin 71.4:98 Table 15.
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Bulletin 71.4:98 Table 16.
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Bulletin 71.4:98 Table 17.
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Bulletin 71.4:98 Table 18.
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Bulletin 71.4:98 Table 19.
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Bulletin 71.4:98 Table 20. Water Relief Capacities in Gallons per Minute (l/min), Type 98HM with Elastomer Diaphragm RELIEF PRESSURE SETTING, PSIG (bar) FLOW AT RELIEF SETTING, GPM (l/min) 15 to 35 (1,0 to 2,4) 1E395627022 Yellow 15 (1,0) 25 (1,7) 35 (2,4) 1.8 (6,8) 1.8 (6,8) 1.8 (6,8) 5.5 (20,8) 10 (37,9) 14.5 (54,9) 10 (37,9) 13.5 (51,1) 17.2 (65,1) 14.7 (55,7) 17.5 (66,2) 19.2 (72,7) 20 (75,7) 21 (79,5) 23 (87,1) 26.1 (98,8) 27.
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Bulletin 71.4:98 Table 21. Water Relief Capacities in Gallons per Minute (l/min), Type 98HM with Metal Diaphragm RELIEF SET PRESSURE BODY SIZES, RANGE, NPT SPRING PART NUMBER, AND COLOR, PSIG (bar) 1/2 3/4, 1 1-1/2, 2 RELIEF PRESSURE SETTING, PSIG (bar) FLOW AT RELIEF SETTING, GPM (l/min) 15 to 35 (1,0 to 2,4) 1E395627022 Yellow 15 (1,0) 25 (1,7) 35 (2,4) 1.8 (6,8) 1.8 (6,8) 1.
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Bulletin 71.4:98 Installation Universal NACE Compliance These valves may be installed in any position, as long as flow will be in the same direction as that of the arrow cast on the body. For dimensional information see Figure 4. Optional materials are available for applications handling sour gases. These constructions comply with the recommendations of NACE International sour service standards. Emerson Process Management Regulator Technologies Inc.
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Bulletin 71.4:98 Ordering Information When ordering, specify: 1. 2. 3. 4. 5. 6. 7. 8.
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Bulletin 71.
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Bulletin 71.4:98 Industrial Regulators Natural Gas Technologies TESCOM Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Tescom Corporation USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S.