Emerson 98 Series Relief Valve Or Backpressure Regulator Instruction Manual
2015-03-30
: Emerson Emerson-98-Series-Relief-Valve-Or-Backpressure-Regulator-Instruction-Manual-681057 emerson-98-series-relief-valve-or-backpressure-regulator-instruction-manual-681057 emerson pdf
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Type 98HH Instruction Manual Form 1930 June 2008 Type 98HH Backpressure and Relief Valves W2592-1 Figure 1. Type 98HH Relief Valve ! Introduction Warning Fisher® relief valves must be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Fisher instructions. Specifications Specifications for the Type 98HH are given on page 2. D100706X012 If the spring case develops a leak 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. Type 98HH (see Figure 1) valve provides relief or differential relief in liquid, gas, air, and steam service applications. Outlet pressure settings range from 150 to 375 psig (10,3 to 25,9 bar). Bodies are available in 1/4, 1/2, 3/4, and 1-inch (DN 15, 20, and 25) sizes. www.emersonprocess.com/regulators Type 98HH Specifications Available Constructions Self-operated with standard adjusting screw. Relief Pressure Range 150 to 375 psig (10,3 to 25,9 bar) End Connection Style NPT, socket weld, or ANSI flanged-14-inches face-to-face (DIN flanged-356 mm face-to-face) Allowable Temperature Ranges(5) Body Sizes 1/4, 1/2, 3/4, and 1-inch (DN 15, 20, and 25) Maximum Inlet Pressures, Psig (bar)(1,5) (Set Pressure Plus Build up) type number steel (wcC) or stainless steel spring case all trims to 150°f(2) (66°C) 98HH 400 (27,6) cast iron spring case Metal Trims(4) All Trims to 150°F(3) (66°C) 400 (27,6) To 315°F (157°C) To 406°F (208°C) 300 (20,7) 250 (17,2) Nitrile (NBR) Parts: -20° to 200°F (-29 to 93°C) Neoprene (CR) Parts: -40° to 150°F (-40 to 66°C) Fluorocarbon (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) 1. Relief pressure setting plus maximum allowable buildup over setting. 2. Or fluorocarbon trims to 300°F (149°C) or metal trims to 450°F (232°C). 3. Or fluorocarbon trims to 300°F (149°C). 4. Interpolate for intermediate pressure ratings. 5. The pressure/temperature limits in this manual and any applicable standard limitation should not be exceeded. 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 from 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 2 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 ! Warning 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. Overpressure ! Warning 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 ! Warning 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 relief 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. 3 Type 98HH 4. Lapping procedure: Parts Ordering a. Place a small amount of 500-grit silicon carbide or aluminum oxide lapping compound on a flat surface such as a piece of heavy plate glass. When corresponding with your local Sales Office about this equipment, be sure to include the type number and other information stamped on the nameplate. 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. When ordering replacement parts, reference the key number each needed part and specify the elevencharacter part number as found in the following parts list. c. Repeat step b for each part, using an 800-grit or 1000-grit silicon carbide or aluminum oxide lapping compound. Parts List d. 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. 5. Return the orifice and valve plug guide to the body. 6. 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. 7. 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. 8. 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. 9. Place the diaphragm gasket on the body and put the diaphragm assembly into position in the body. 10. Set the spring and upper spring seat over the lower spring seat. Place the upper casing on the body, tightening the cap screws finger-tight only. 11. To ensure proper slack in the diaphragm, apply some spring compression by turning the adjusting screw clockwise. Tighten the cap screws. 4 Key Description Part Number 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 1 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 2 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 3* 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. R98HX000012 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 N.S. diaphragm 15 9 17 2 11 23 spring 26 8 loading pressure connection (type 98HHD) 16 12 METAL valve plug 19 METAL 10 6 N.S. orifice 5 4 N.S. 3 N.S. CN9433 A1788-1 1 NEVER SEEZ (1) 30A7036-A Figure 2. Operational Schematic for Type 98HH Relief Valves Figure 3. Type 98HH Relief Valve Assembly with Metal Seals 1. Never-Seez mark owned by Never-Seez Corp. 5 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-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 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. 6 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 7 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 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 Type 98HH 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 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 Part Number 1N942227142 1N943427142 1N944127182 1L344902112 1L344902402 1L345036012 1L341202112 1L341202402 1L339936012 1L343302112 1L3433X0032 1L343236012 1E639928982 1E268028982 1N944028982 1K764624052 1B787724052 1C403824052 1A352224122 1A352424122 1A319224122 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 Number 1L346035132 1L346035072 1L341535232 1L341535072 1L343035132 1L343035072 1C853806992 1C8538X0052 1D288806992 1N530106382 1C782106992 1C7821X0072 1C225628982 1H624328992 1L346238992 1J4159X0012 1L343538992 1L872324122 1L872224122 1A368228982 1E393104022 1E396104022 1E399304022 *Recommended spare part. 7 Type 98HH Industrial Regulators Regulator Division Emerson Process Management Natural Gas Technologies Regulator Division Emerson Process Management TESCOM Regulator Division Emerson Process Management USA - Headquarters McKinney, Texas 75070 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters McKinney, Texas 75070 Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters Elk River, Minnesota 55330 USA Tel: 1-763-241-3238 Asia-Pacific Shanghai, China 201206 Tel: +86 21 2892 9000 Asia-Pacific Singapore, Singapore 128461 Tel: +65 6777 8211 Europe Bologna, Italy 40013 Tel: +39 051 4190611 Europe Bologna, Italy 40013 Tel: +39 051 4190611 Gallardon, France 28320 Tel: +33 (0)2 37 33 47 00 Europe Selmsdorf, Germany 23923 Tel: +49 (0) 38823 31 0 For further information visit www.emersonprocess.com/regulators 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. ©Fisher Controls International, Inc., 1976, 2008; All Rights Reserved
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