Emerson 1805 Series Relief Valves Instruction Manual
Contents
1. 1 The pressure temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded Table 1 Relief Set Pressure Ranges RELIEF PRESSURE RANGE SPRING FREE LENGTH AMEER SPRING COLOR BODY SIZE SPRING PART NUMBER CODE psig bar Inches mm Inches mm 5to 35 0 34 to 2 4 1B986027212 Green 2 25 57 2 0 12 3 05 3 4 or 1 NPT 10 to 60 0 69 to 4 1 1B788327022 Silver 2 13 54 1 0 14 3 56 20 to 125 1 4 to 8 6 1B788427022 Blue 1 94 49 3 0 18 4 57 5 to 20 0 34 to 1 4 1D892327022 Red 2 94 74 7 0 17 4 32 1 1 2 or 2 NPT 10 to 50 0 69 to 3 5 1D665927022 Blue 2 50 63 5 0 22 5 59 35 to 125 2 4 to 8 6 1E543627142 Yellow 2 31 58 7 0 28 7 11 Table 2 Flow and IEC Sizing Coefficients IEC SIZING COEFFICIENTS BODY SIZE C Km Xr Fp F 3 4 to 1 NPT 0 73 0 39 35 0 79 0 89 1 1 2 to 2 NPT 0 94 0 44 UPPER SPRING SEAT DIAPHRAGM HEAD UNION NUT N d O RING HOLDER O RING WASHER A6671 E INLET PRESSURE E OUTLET PRESSURE ATMOSPHERIC PRESSURE 1805 Series DIAPHRAGM VALVE GUIDE ORIFICE O RING BODY Figure 2 1805 Series Operational Schematic Principle of Operation See Figure 2 Relief valves respond to changes in upstream pressure If upstream pressure increases and exceeds the relief valve setting the valve will open and allow gas to vent to the atmosphere When upstream pressure returns to normal level belo2. remains solely with the purchaser Emerson Process Management Regulator Technologies Inc 1975 2011 All Rights Reserved
3. 2 NPT body sizes 14 Adjusting Screw Brass 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 15 Hex Nut Zinc plated steel 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 16 Union Nut Ductile iron 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 17 Closing Cap Brass Types 1805 2 and 7 Type 1805 3 19 Drive Screw Steel 4 required 1 1 2 and 2 NPT body sizes 20 Screen Stainless steel not shown Type 1805 7 21 Snap Ring 302 Stainles steel not shown Type 1805 7 22 NACE Tag 18 8 Stainless steel not shown 23 Tag Wire 304 Stainless steel not shown 24 Pipe Plug Alloy plated steel Part Number 1B290524052 1E760324052 1B986027212 1B788327022 1B788427022 1D892327022 1D665927022 1E543627142 1B798525062 1D667125072 2E770819012 2E824919042 1E770914012 1E543214012 1A946324122 1D667728982 1E471119062 1E766619062 1E770614012 1E823914012 1E501728982 1E564843122 1E564937022 19A6034X012 1U7581X0022 10333528992 1805 Series 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 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 For further information visit www fisherregulators com Natural Gas Technologies Emerson
4. Instruction Manual 1 805 Series Form 1211 October 2011 1805 Series Relief Valves Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion and or fire causing property damage and personal injury or death Fisher relief valves must be installed operated and maintained in accordance with federal state and local codes rules and regulations and Emerson Process Management Regulator Technologies 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 Call a gas service person to service the unit Only a qualified person must install or service the 1805 Series Relief Valves P1026 Figure 1 1805 Series Relief Valve Introduction Scope of the Manual natural gas air propane or any operating medium that is not corrosive to the internal parts Relief pressure This Instruction Manual provides installation ranges from 5 to 125 psi 0 34 to 8 6 bar Maximum adjustment maintenance and parts ordering pressure including buildup is 150 psi 10 3 bar information for 1805 Series relief valves Specifications Description The Specifications section lists the specifications for The 1805 Series relief valves are primarily designed the 1805 Series relief valve The following in
5. 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 128461 Singapore Tel 65 6770 8337 Europe Bologna 40013 Italy Tel 39 051 419 0611 Gallardon 28320 France Tel 33 2 37 33 47 00 TESCOM Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445 USA Tels 1 763 241 3238 1 800 447 1250 Europe Selmsdorf 23923 Germany Tel 49 38823 31 287 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9499 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 International LLC 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
6. To ensure proper slack in the diaphragm tighten the union nut finger tight only Turn the adjusting screw clockwise to apply some spring force to the diaphragm Complete the tightening of the union nut Parts Ordering When corresponding with your local Sales Office or the factory concerning these relief valves include the type number and all other pertinent information stamped on the spring case closing cap or on the nameplate Specify the eleven character part number when ordering new parts from the following parts list When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kit containing all recommended spare parts is available 1805 Series CROEOZORORO SOAP AOOeE OOO aay PTZ aaa eer ETI u NY ZZZ AZA Ui EK ep 4 ee Figure 4 Type 1805 3 Relief Valve Assembly Also typical of 1805 relief valves Parts List Key Description Parts kit included are keys 3 5 and 8 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes Valve Body Types 1805 2 and 4 3 4 NPT Cast iron Ductile iron NACE 1 NPT Cast iron Ductile iron NACE Types 1805 3 and 5 1 1 2 NPT Cast iron 2 NPT Cast iron Type 1805 7 3 4 NPT Cast iron 1 NPT Cast iron 2 Valve Guide Orifice Aluminum 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 3 Tetraseal O ring Nitrile NBR 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 4 O Ri
7. eal is a mark owned by of Goshen Rubber Company 1805 Series Due to normal wear that may occur in relief valves the O rings and diaphragm must 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 relief valve and replacement of the O rings and diaphragm The 1805 Series relief valves do not have to be removed from the pipeline to inspect internal parts Refer to Figure 4 while servicing the relief valves Disassembly Assembly 1 To ease spring compression remove the closing cap key 17 Types 1805 2 3 and 7 loosen the hex nut key 15 and turn the adjusting screw key 14 counterclockwise 2 Unscrew the union nut key 16 and remove it with the spring case key 13 spring key 11 and upper spring seat key 12 3 Pull the O ring holder key 4 out of the valve guide orifice key 2 4 Remove the diaphragm cap screw key 10 from the O ring holder Take off the diaphragm plate key 9 and inspect the diaphragm key 8 5 Take the machine screw key 7 out of the opposite end of O ring holder remove the O ring washer key 6 and inspect the O ring key 5 6 Remove the valve guide orifice key 2 from the body and check the Tetraseal O ring key 3 7 Reassemble the relief valve in reverse order of the above steps
8. formation for use in farm tap applications where a safety relief is stamped on the relief valve at the factory type valve is needed between the first and second stage number date of manufacture spring range maximum regulators The 1805 Series is suitable for service on inlet pressure and maximum allowable inlet pressure 6 EMERSON Process Management D100345xX012 1805 Series Specifications Available Constructions Type 1805 2 Cast iron spring case closing cap with 1 4 NPT vent placed over the adjusting screw Available in 3 4 and 1 NPT body sizes Type 1805 3 Cast iron spring case closing cap with 1 4 NPT vent placed over the adjusting screw Available in 1 1 2 and 2 NPT body sizes Type 1805 4 Cast iron spring case Available in 3 4 and 1 NPT body sizes Type 1805 5 Cast iron spring case Available in 1 1 2 and 2 NPT body sizes Type 1805 7 Cast iron spring case closing cap with 1 4 NPT vent placed over the adjusting screw screen in outlet Available in 3 4 and 1 NPT body sizes Body Style Globe body Body Sizes and End Connection Style 3 4 1 1 1 2 or 2 NPT Maximum Inlet Pressure 150 psig 10 3 bar including buildup Relief Valve Set Pressure Ranges See Table 1 Flow and IEC Sizing Coefficients See Table 2 Temperature Capabilities 20 to 150 F 29 to 66 C Approximate Shipping Weights 3 4 to 1 NPT bodies 5 pounds 2 kg 1 1 2 to 2 NPT bodies 13 pounds 6 kg
9. g damage Remove pipe scale and other foreign material from the connecting pipeline Coat the male pipe threads with a suitable pipe compound The unit can be installed in any position as long as the flow is in the direction indicated by the arrow cast on the body Protect the outlet and vents from entrance of rain snow or other foreign material that may plug them Outdoor installations should include a rain cap over the vents and outlet if they point upward Periodically check the openings to ensure that they are not plugged Protect the relief valve against damage from vehicles or other external sources Vents Venting gas may accumulate and be an explosion hazard under enclosed conditions such as in pit or underground installations Install remote vent lines to carry gas to a safe area If remote vent lines are necessary use the Type 1805 2 3 or 7 which have 1 4 NPT vent connections in the closing cap Remove the screen if one is present in the outlet and install remote vent lines in the outlet and closing cap openings Remote vent lines must have the largest practical diameter as possible The vent lines should be as short as possible with a minimum number of bends or elbows Overpressure Relief pressure ratings are from 5 to 125 psi 0 34 to 8 6 bar The maximum inlet pressure including buildup is 150 psi 10 3 bar System operation within these limitations does not eliminate the possibility of damage from ex
10. ng Holder Aluminum 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 5 O Ring Nitrile NBR 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 6 O Ring Washer Stainless steel 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 7 Machine Screw Steel 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 8 Diaphragm Nitrile NBR 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 9 Diaphragm Plate Brass 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes Recommended spare part Tetraseal is a mark owned by of Goshen Rubber Company Part Number R1805X00012 R1805X00022 1E621119012 1F192019062 1E621219012 1F192119062 1E824019012 1E824319012 1H242519012 1H242619012 1K314709012 1N939909012 1K314806992 1N940306562 1E621609092 1E824609092 1D288806992 105622X0022 1D335935072 1E824235072 16A0429X012 1B420428982 1E621702052 1E824102052 1E621814012 1E824714012 1805 Series Key Description 10 Cap Screw Zinc plated steel 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 11 Spring Zinc plated steel 3 4 and 1 NPT body sizes 5 to 35 psig 0 34 to 2 4 bar 10 to 60 psig 0 69 to 4 1 bar 20 to 125 psig 1 4 to 8 6 bar 1 1 2 and 2 NPT body sizes 5 to 20 psig 0 34 to 1 4 bar 10 to 50 psig 0 69 to 3 5 bar 35 to 125 psig 2 4 to 8 6 bar 12 Upper Spring Seat Steel 3 4 and 1 NPT body sizes 1 1 2 and 2 NPT body sizes 13 Spring Case Cast Iron 3 4 and 1 NPT body sizes 1 1 2 and
11. ternal sources or from debris in the gas line The relief valve should be inspected for damage regularly and after any overpressure condition Startup Key numbers are shown in Figure 4 With proper installation completed and system equipment properly adjusted close any vent valves and slowly open the upstream shut off valve while using pressure gauges to monitor pressure If set pressure adjustment is necessary monitor the inlet pressure with a gauge during the adjustment procedure Adjustment The range of allowable pressure settings is stamped on the spring case Types 1805 2 4 and 7 or on the nameplate Types 1805 3 and 5 If a pressure setting beyond the indicated range is required substitute the appropriate spring Be sure to label the relief valve to indicate the new pressure range Always use a pressure gauge to monitor pressure when making adjustments 1 On Types 1805 2 3 and 7 remove the closing cap key 17 2 Loosen hex nut key 15 3 To increase the relief setting turn the adjusting screw key 14 clockwise To decrease the relief setting turn the adjusting screw counterclockwise 4 Tighten the hex nut Shutdown Close the upstream shut off valve and release all pressure from the relief valve Maintenance To avoid personal injury and equipment damage isolate the relief valve from all pressure Cautiously release pressure from the relief valve before attempting disassembly Tetras
12. w the setting of the relief valve the relief valve automatically closes and normal system operation resumes In the 1805 Series relief valves the upstream pressure registers underneath the diaphragm Gas reaches the diaphragm through the space between the O ring holder and the valve guide orifice in 3 4 and 1 NPT bodies or through registration holes in the valve guide orifice in 1 1 2 and 2 NPT bodies When the upstream pressure increases beyond the spring setting the force on the diaphragm overcomes spring compression The O ring holder moves upward carrying the O ring away from the valve seat This opens the flow line allows gas to flow to the atmosphere and relieves the overpressure condition When upstream pressure registered on the diaphragm decreases to a level below that of the spring setting of the relief valve the spring force pushes the diaphragm plate and O ring holder toward the valve seat Contact between O ring and valve seat prevents further flow to atmosphere 1805 Series TYPE CS200IN SET AT 8 inches w c 20 mbar TYPE 1805 SET AT 40 psi 2 8 bar ROTATE PIPING SO DISCHARGE FROM RELIEF VALVE MISSES REGULATOR qq TYPE R622 ASSEMBLY OR 4 SET AT 25 psi 1 7 bar INLET PRESSURE UP TO 750 psi 51 7 bar TEST GAUGE CONNECTION PLUGGED OPTIONAL HAND VALVE OR PLUG COCK OPTIONAL Figure 3 Typical Farm Tap Installation Installation After unpacking check the relief valve for shippin
Download Pdf Manuals
Related Search