Emerson 98 Series Relief Valve or Backpressure Regulator Instruction Manual
Contents
1. Overpressure Overpressuring any portion of this equipment may cause equipment damage leaks in the relief valve or personal injury due to bursting of pressure containing parts The system should be inspected after any overpressure condition Relief pressure settings range from 150 to 375 psig 10 3 to 25 9 bar Adjustment Each unit is factory set for the pressure setting specified on the order If adjustment is necessary use a pressure gauge to monitor the pressure Turn the adjusting screw key 15 clockwise to increase the pressure or differential pressure setting To decrease the setting turn the adjusting screw counterclockwise Maintenance To avoid personal injury and equipment damage isolate the valve from all pressure Cautiously release pressure from the relief valve before attempting disassembly Due to normal wear and damage that may occur from external sources relief valve parts such as the O rings gaskets diaphragm orifice and valve plug should be inspected periodically and replaced as necessary The frequency of inspection and replacement depends upon the severity of service conditions or the requirements of state and federal laws Instructions are given below for disassembly of the Type 98HH relief and backpressure valves These valves do not have to be removed from the pipeline to inspect internal parts Suitable lubricants are indicated on the assembly drawings Apply the lubricants as the reli2. body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 18 Drive Screw stainless steel not shown 2 required 19 Diaphragm Gasket elastomer Use with 302 stainless steel diaphragm 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Recommended spare part Part Number 1N942227142 1N943427142 1N944127182 1L344902112 1L344902402 1L345036012 1L341202112 1L341202402 1L339936012 1L343302112 1L3433X0032 1L343236012 1E639928982 1E268028982 1N944028982 1K764624052 1B787724052 1C403824052 14352224122 1A352424122 1A319224122 1A368228982 1E393104022 1E396104022 1E399304022 Type 98HH Key Description 21 O Ring Retainer elastomer seat only 1 4 inch body 416 stainless steel 316 stainless steel 1 2 inch DN 15 body 416 stainless steel 316 stainless steel 3 4 and 1 inch DN 20 and 25 bodies 416 stainless steel 316 stainless steel 22 O Ring elastomer seat only 1 4 inch body Nitrile NBR Fluorocarbon FKM 1 2 inch DN 15 body Nitrile NBR Fluorocarbon FKM 3 4 and 1 inch DN 20 and 25 bodies Nitrile NBR Fluorocarbon FKM 23 Lockwasher steel 1 4 and 1 2 inch DN 15 bodies 3 4 and 1 inch DN 20 and 25 bodies 24 Machine Screw stainless steel elastomer seat only 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 26 Locknut steel zinc plate 1 4 and 1 2 inch DN 15 bodies 3 4 and 1 inch DN 20 and 25 bodies Part Nu
3. 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 GFisher Controls International Inc 1976 2008 All Rights Reserved
4. 10 Set the spring and upper spring seat over the 11 lower spring seat Place the upper casing on the body tightening the cap screws finger tight only To ensure proper slack in the diaphragm apply some spring compression by turning the adjusting Screw clockwise Tighten the cap screws Parts Ordering When corresponding with your local Sales Office about this equipment be sure to include the type number and other information stamped on the nameplate When ordering replacement parts reference the key number each needed part and specify the eleven character part number as found in the following parts list Parts List Key Description N 3 Parts kit included are keys 3 4 10 12 19 21 22 and 24 Elastomer Trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Metal Trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Body Cast iron 1 4 inch NPT 1 2 inch NPT 3 4 inch NPT 1 inch NPT Steel 1 4 inch NPT 1 2 inch NPT 3 4 inch NPT 1 inch NPT 316 stainless steel 1 4 inch NPT 1 2 inch NPT 3 4 inch NPT 1 inch NPT Spring Case Cast iron 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Orifice Metal to metal seat 416 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Recommended spare part Part Number R9
5. 8HX000012 R98HX000022 R98HX000032 R98HX000042 R98HX000052 R98HX000062 1L346419012 2L339519012 2L342519012 2L342619012 1L372122012 2L368722012 2L373422012 2L373522012 1L372133092 2L368733092 2L373433092 2L373533092 2P181922012 2P182122012 3P182422012 2P181922012 2P182122012 3P182422012 1E391646172 1E395046172 1E398046172 Type 98HH ii BAX SY WS TIN a WY N S BA NS Ii SEA MO E 7 A SS e AS S Y 69 i 7 R WAG SN EX QOO eoo D Z A N S NEVER SEEZ LOADING PRESSURE CONNECTION TYPE 98HHD DIAPHRAGM Figure 3 Type 98HH Relief Valve Assembly with Metal Seals Figure 2 Operational Schematic for Type 98HH Relief Valves r Seez r Seez mark owned by Neve Neve 1 Type 98HH Key Description 3 Orifice continued Metal to metal seat 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Elastomer Seat 416 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 4 Valve Plug Metal to metal seat 416 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Elastomer Seat 416 stainless steel 1 4 inch body 1 2 i
6. Spring Seat 1 4 inch body aluminum 1 2 inch DN 15 body steel zinc plate 3 4 and 1 inch DN 20 and 25 bodies steel zinc plate 9 Upper Spring Seat steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 10 Gasket elastomer 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Part Number 1L345635132 1L3416X0102 1L343835132 1L345635072 1L344235072 1L343835072 1L345735132 1L344535132 1L343935132 1L345735072 1L344535072 1L343935072 1L344736012 1L339836012 1L342836012 1L344736142 1L339835072 1L342836142 1N942009012 1N943024272 1N943824272 1N942124092 1N943124092 1N943924092 1L344804022 1L341104022 1L343404022 Key Description 11 Relief Valve Spring steel zinc plate 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 12 Diaphragm 1 4 inch body Neoprene CR Fluorocarbon FKM 2 required 302 stainless steel 2 required 1 2 inch DN 15 body Neoprene CR Fluorocarbon FKM 2 required 302 stainless steel 2 required 3 4 and 1 inch DN 20 and 25 bodies Neoprene CR Fluorocarbon FKM 2 required 302 stainless steel 2 required 15 Adjusting Screw steel plate 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 16 Cap Screw steel zinc plate 1 4 inch body 6 required 1 2 inch DN 15 body 8 required 3 4 and 1 inch DN 20 and 25 bodies 8 required 17 Jam Nut steel zinc plate 1 4 inch
7. ef valve is being reassembled Refer to Figure 3 while servicing the relief valve Disassembly to Replace Diaphragm and Seats If the relief valve is leaking the diaphragm may be ruptured or the seating surfaces nicked or scratched Proceed as follows to replace or repair the diaphragm orifice and valve plug 1 Release all spring compression from the diaphragm by turning the adjusting screw Key 15 counterclockwise 2 Remove cap screws key 16 and lift off the spring case key 2 spring key 11 upper spring seat Key 9 and diaphragm assembly The diaphragm assembly includes the locknut key 26 pusher post key 6 lock washer key 23 lower spring seat key 8 diaphragm key 12 gasket key 10 washer key 7 Note There are two diaphragms if the diaphragm material is metal or fluorocarbon 3 Check the orifice key 3 If it needs replacing or repairing unscrew the valve plug guide key 5 and then the orifice The valve plug can be removed by sliding it off of the pusher post Note If damage to elastomer or metal seating surfaces is severe replace the orifice and valve plug O ring with new parts However by following the lapping procedure below it is possible to repair metal seating surfaces if they are only slightly worn or scratched Type 98HH 4 Lapping procedure a Place a small amount of 500 grit silicon carbide or aluminum oxide lapping compound on a flat surface such as a piece of heav
8. mber 1L346035132 1L346035072 1L341535232 1L341535072 1L343035132 1L343035072 1C853806992 1C8538X0052 1D288806992 1N530106382 1C782106992 1C7821X0072 1C225628982 1H624328992 1L346238992 1J4159X0012 1L343538992 1L872324122 1L872224122 Type 98HH Industrial Regulators Regulator Division Emerson Process Management USA Headquarters McKinney Texas 75070 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 Natural Gas Technologies Regulator Division Emerson Process Management USA Headquarters McKinney Texas 75070 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 For further information visit www emersonprocess com regulators TESCOM Regulator Division Emerson Process Management USA Headquarters EIk River Minnesota 55330 USA Tel 1 763 241 3238 Europe Selmsdorf Germany 23923 Tel 49 0 38823 31 0 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
9. nch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 5 Valve Plug Guide 416 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Recommended spare part Part Number 1E391635072 1E395035072 1E398035072 1L345935132 1L341735132 1L343135132 1L345935072 1L341735072 1L343135072 1L345246172 1L344146172 1L343746172 1L345235072 1L344135162 1L343735162 1L345135132 1L344335132 1L343635132 1L345135072 1L344335072 1L343635072 1L345835132 1L341635132 1L342935132 1L345835072 1L3416X0102 1L342935072 Key Description 6 Pusher Post Elastomer Diaphragm 416 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies Metal Diaphragm 416 stainless steel trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies T Washer elastomer diaphragm only 416 stainless steel trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 316 stainless steel trim 1 4 inch body 1 2 inch DN 15 body 3 4 and 1 inch DN 20 and 25 bodies 8 Lower
10. omo Type98HH June 2008 Type 98HH Backpressure and Relief Valves W2592 1 Figure 1 Type 98HH Relief Valve Lipase Type 98HH see Figure 1 valve provides relief Fisher relief valves must be installed or differential relief in liquid gas air and steam service operated and maintained in accordance applications Outlet pressure settings range from 150 to with federal state and local codes rules 375 psig 10 3 to 25 9 bar Bodies are available in 1 4 and regulations and Fisher instructions 1 2 3 4 and 1 inch DN 15 20 and 25 sizes If the spring case develops a leak or if the outlet continually vents gas service Specifications to the unit may be required Failure to correct trouble could result in a Specifications for the Type 98HH are given on page 2 hazardous condition Only a qualified person must install or service the unit D100706X012 Type 98HH Specifications Available Constructions Self operated with standard adjusting screw End Connection Style NPT socket weld or ANSI flanged 14 inches face to face DIN flanged 356 mm face to face Body Sizes 1 4 1 2 3 4 and 1 inch DN 15 20 and 25 Maximum Inlet Pressures Psig bar Set Pressure Plus Build up Relief Pressure Range 150 to 375 psig 10 3 to 25 9 bar Allowable Temperature Ranges Nitrile NBR Parts 20 to 200 F 29 to 93 C Neoprene CR Parts 40 to 150 F 40 to 66 C Fluorocarb
11. on FKM Parts 0 to 300 F 18 to 149 C Metal Diaphragm and Seat Cast Iron Body and Spring Case 40 to 406 F 40 to 208 C Steel Body and Spring Case 20 to 450 F 29 to 232 C Stainless Steel Body and Spring Case 40 to 450 F 40 to 232 C Approximate Weights Pounds kg 1 4 inch Body 8 3 63 1 2 inch DN 15 Body 8 3 63 3 4 inch DN 20 Body 20 9 07 1 inch DN 25 Body 20 9 07 STEEL CAST IRON SPRING CASE acs Metal Trims TYPE STEEL ATA i NUMBER SPRING rims to is o CASE ALL 150 F 66 C To 319 F To 309 F TRIMS TO 157 C 208 C 150 F 66 C 98HH 400 27 6 400 27 6 300 20 7 250 17 2 Relief pressure setting plus maximum allowable buildup over setting Or fluorocarbon trims to 300 F 149 C or metal trims to 450 F 232 C Or fluorocarbon trims to 300 F 149 C Interpolate for intermediate pressure ratings OoRONZA Principle of Operation See Figure 2 Type 98HH relief and backpressure valves relieves excessive pressures upstream of the main regulator If the upstream pressure rises above the setting of the relief valve pressure on the underside of the diaphragm overcomes the spring compression The valve plug moves away from the orifice and allows the excess pressure to escape When the upstream pressure returns to normal the plug resumes a closed position Installation Unbox and inspect the valve Remove pipe scale and other foreign material f
12. rom the connecting pipeline Apply a suitable pipe compound to the male threads The relief valve can be installed in any position as long as the flow is in the direction indicated by the arrow cast on the body The design of the valve isolates the diaphragm and pressure response chamber from the main flow stream High pressure is measured inside the body through a registration hole on the inlet side of the body If loading pressure is required connect the loading pressure line to the NPT connection in the The pressure temperature limits in this manual and any applicable standard limitation should not be exceeded spring case This connection is 1 8 inch NPT for 1 4 inch bodies 1 4 inch NPT for 1 2 inch DN 15 bodies If loading pressure is not required this connection should be vented to atmosphere Maximum operating temperatures for the Type 98HH relief valves are as follows Elastomer diaphragm or seat 150 F 66 C Metal diaphragm or seat 406 F 208 C with a cast iron body and spring case or 450 F 232 C with a steel or stainless steel body and spring case Vents If the process fluid is hazardous install remote vent lines to carry fluid to a safe area Type 98HH If remote venting is necessary install a remote vent line in the spring case and outlet connections of Type 98HH relief valve The vent lines must have the largest practical diameter and be as short as possible with a minimum number of bends or elbows
13. y 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 Repeat step b for each part using an 800 grit or 1000 grit silicon carbide or aluminum oxide lapping compound Wash away all traces of the lapping compound To help prevent scratching the seating surfaces a light coat of oil may be applied before returning the valve plug and the ring to the body Return the orifice and valve plug guide to the body To replace the valve plug O ring key 22 remove the screw key 24 and O ring retainer Key 21 from the plug Remove and replace the spring O ring Remove the locknut from the pusher post in order to separate the parts of the diaphragm assembly Inspect and replace if necessary the diaphragm diaphragm gasket key 19 and pusher post gaskets key 10 Note These valve have either a metal or elastomer diaphragm If a metal diaphragm is to be replaced with an elastomer diaphragm or an elastomer diaphragm with a metal diaphragm a new pusher post is required Slip the plug back onto the pusher post and return the rest of the diaphragm assembly parts to the pusher post in the following order gasket diaphragm O ring lower spring seat and washer Screw on the locknut Place the diaphragm gasket on the body and put the diaphragm assembly into position in the body
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