Emerson H800 Instruction Manual
Contents
1. The relief valve body may remain installed during maintenance or inspection unless it is to be replaced Instructions are given below for disassembly and assembly of parts To avoid personal injury or equipment damage from sudden release of pressure or explosion of accumulated gas do not attempt any maintenance or disassembly without first isolating the relief valve and associated equipment from system pressure and relieving all internal pressure from the relief valve and associated equipment Disassembly The following procedure describes the complete disassembly of the Type H800 relief valve When parts replacement or inspection is required complete only those steps necessary to accomplish the job Key numbers refer to Figure 3 1 Vent any pressure in the relief valve 2 Unscrew the machine screws key 9 and remove the spring case key 2 3 Remove the spring key 3 spring cup key 4 diaphragm disk key 11 and diaphragm key 5 4 If necessary remove the retaining ring key 8 the screen key 7 and disk restriction key 6 Assembly This procedure describes complete assembly If the relief valve has been only partially disassembled start these instructions at the appropriate step Key numbers refer to Figure 3 1 Insert the diaphragm key 5 so that the raised circular ridge faces toward the spring cup key 4 as shown in Figure 3 2 Slide the spring key 3 into the spring cup key 4 3 Plac2. gas from the connection marked vent In hazardous or flammable gas service the vented gas may accumulate causing personal injury or equipment damage due to fire or explosion Provide piping or tubing to vent the gas to a safe well ventilated location and protect all vent openings from condensation freezing or any substance that could clog the vents The 1 2 NPT vent connection must face down in any installation Also the screen key 7 and disk restriction key 6 must either remain in the relief valve body key 1 or be replaced by remote vent piping or tubing that is as short and as straight as practical The piping or tubing should be 1 2 inch 13 mm in diameter to avoid the effects of backpressure build up on relief performance Provide a screened vent for the open end of the remote vent piping or tubing Figure 2 illustrates two typical methods of connecting a Type H800 relief valve to a 67 Series regulator A yoke mounted supply pressure regulator and pneumatic instrument are shown in Figure 2 however the two methods of connecting a Type H800 relief valve to a 67 Series regulator also apply to pneumatic instruments mounted on other equipment in other orientations Table 1 lists the conditions for the two typical methods of installing a Type H800 relief valve Whenever possible use installation A since a Type H800 relief valve with or without remote vent piping will limit instrument supply pressure to 50 psig 3 4 bar
3. when a 67 Series regulator fails open with 250 psig 17 2 bar inlet pressure For installation A install the relief valve in the instrument supply tubing between the supply pressure regulator and the pneumatic instrument Apply pipe compound to the male threads of the pipe nipple and the fitting for the instrument supply pressure tubing For installation B connect the relief valve with a pipe nipple to the outlet pressure gauge connection of the 67 Series regulator Install a pipe plug or pressure gauge as shown in Figure 2 Apply pipe compound to the male threads of the pipe nipple and pipe plug or pressure gauge Maintenance Relief valve parts are subject to normal wear and must be inspected and replaced as necessary The frequency of inspection and parts replacement depends on the severity of service conditions and the requirements of local state and federal rules and regulations PNEUMATIC INSTRUMENT TYPE H800 RELIEF VALVE TUBING FOR INSTRUMENT a SUPPLY PRESSURE W3615 Type H800 __ ACTUATOR YOKE TYPE 67AFR REGULATOR INLET PRESSURE TUBING VENT CONNECTION ACTUATOR YOKE INSTALLATION A PNEUMATIC INSTRUMENT INLET PRESSURE TUBING W3616 ioe ACTUATOR YOKE TYPE 67AFR REGULATOR TYPE H800 RELIEF VALVE PIPE PLUG MAY ALSO BE OPTIONAL GAUGE SS VENT CONNECTION TUBING FOR INSTRUMENT SUPPLY PRESSURE INSTALLATION B Figure 2 Typical Installation Orientations
4. Instruction Manual Form 5187 March 2009 Type H800 Relief Valve Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion fire and or chemical contamination 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 manufacturer s 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 ina 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 result in equipment damage or personal injury Use qualified personnel when installing operating and maintaining the Type H800 relief valve Introduction Scope of the Manual This manual provides installation maintenance and parts ordering information for the Type H800 relief valve Information for other equipment used with this relief valve is contained in separate manuals Product Description The Type H800 relief valve See Figure 1 is a compact Direct Operated relief valve It is used primarily between a pneumatic instrument and its supply pressure regulator to limit the instrument supply press
5. e the diaphragm disk key 11 spring cup and spring on the diaphragm Orient the diaphragm disk so that its raised circular lip faces toward the spring cup as shown in Figure 3 4 Position the spring case key 2 on the body key 1 Insert and tighten the machine screws key 9 5 Insert the disk restriction key 6 screen key 7 and retaining ring key 8 Type H800 Parts Ordering When ordering replacement parts for a Type H800 relief valve refer to the following parts list and specify the complete 11 character part number of each needed part Parts List ON N Key Description Part Number A d Relief Valve Body Aluminum 26A9050X012 2 Spring Case Aluminum 26A9051X012 3 Spring Steel 16A9052X012 4 Spring Cap Valox 730 plastic 26A9053X012 IODS 5 Diaphragm Nitrile NBR 16A9054X012 1 4 NPT 6 Disk Restriction 302 Stainless steel 16A9055X012 7 Screen 304 Stainless steel 16A9056X012 8 Internal Retaining Ring Plated steel 16A9057X012 6 9 Machine Screw Plated steel 2 required 1B7839xX0012 10 Pipe Nipple not shown for use in A installation B Galvanized steel 1C678926232 11 Diaphragm Disk Plated steel 17A7753X012 1 2 NPT VENT 26A9059 B A2908 Recommended spare part Valox 730 is a mark owned by General Electric Co Figure 3 Type H800 Relief Valve Assembly I
6. let Relief Pressure 250 psig 17 2 bar Relief Pressure Ranges Non adjustable Start to discharge between 39 and 44 psig 2 7 and 3 0 bar Reseat Pressure 35 psig 2 4 bar or higher Wide Open Flow Coefficients for Relief Valve Sizing C 55 Maximum Temperature Capabilities 20 to 150 F 29 to 66 C IEC Sizing Coefficients X 0 775 F 0 50 F 0 89 Vent Connection 1 2 NPT internal Approximate Weight 5 ounces 140 grams 1 The pressure temperature limits in this Instruction Manual or any applicable standard limita ion should not be exceeded Table 1 Maximum Allowable Inlet Pressure to 67 Series Regulators with Type H800 Relief Valve to Prevent Instrument Supply Pressure from Exceeding 50 psig 3 4 bar TYPE H800 INSTALLATIONS SUPPLY PRESSURE REMOTE MAXIMUM ALLOWABLE INLET PRESSURE TO FROM FIGURE 2 REGULATOR TYPES VENT PIPING SUPPLY PRESSURE REGULATOR PSIG bar 67 67R 67R 67FR Yes ii 67CF or 67CFR No 290 ANE Yes 100 6 9 i 67 67R 67CF or 67CFR No 250 17 2 Yes 100 6 9 67FR or 67F No 200 13 8 1 Limit vent piping to 30 equivalent feet 9 14 equivalent meters of 1 2 inch 13 mm piping Lower vent piping may reduce the maximum allowable inlet pressure to supply pressure regulator The relief valve may be shipped already mounted on other equipment if so install that equipment by referring to its Instruction Manual This relief valve vents
7. ndustrial Regulators Natural Gas Technologies TESCOM Emerson Process Management Emerson Process Management Emerson Process Management Regulator Technologies Inc Regulator Technologies Inc Tescom Corporation USA Headquarters USA Headquarters USA Headquarters McKinney Texas 75069 1872 USA McKinney Texas 75069 1872 USA Elk River Minnesota 55330 2445 USA Tel 1 800 558 5853 Tel 1 800 558 5853 Tel 1 763 241 3238 Outside U S 1 972 548 3574 Outside U S 1 972 548 3574 Europe Asia Pacific Asia Pacific Selmsdorf Germany 23923 Shanghai China 201206 Singapore Singapore 128461 Tel 49 0 38823 31 0 Tel 86 21 2892 9000 Tel 65 6777 8211 Europe Europe Bologna Italy 40013 Bologna Italy 40013 Tel 39 051 4190611 Tel 39 051 4190611 Gallardon France 28320 Middle East and Africa Tel 33 0 2 37 33 47 00 Dubai United Arab Emirates Tel 971 4811 8100 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 applicabilit
8. ure to 50 psig 3 4 bar should the supply pressure regulator fail open The Type H800 relief valve can also be mounted on other equipment such as an air compressor where limited relief capacity is desired Type H800 W3618 Figure 1 Type H800 Relief Valve Specifications Specifications for the Type H800 relief valve are given on page 2 Additional specifications for 67 Series regulators used with Type H800 relief valves are shown in Table 1 Installation Upon receipt inspect the relief valve to be sure it is free of foreign material Installing a Type H800 relief valve where its capabilities can be exceeded or where proper operation might be impaired may cause personal injury property damage or leakage due to bursting of pressure containing parts or explosion of accumulated gas To avoid such conditions install a Type H800 relief valve where e Service conditions are within the unit capabilities are specified in specifications section and Table 1 and e The relief valve is protected from exposure to physical damage and or corrosive substances 1 Relief valve defined in ANSI Standard B95 1 1972 Not all codes or regulations permit these valves to be used as final overpressure protection devices FISHER www emersonprocess com regulators ys cess Miaanagem EMERSON D100405x012 Type H800 Specifications Body Size and End Connection Style NPS 1 4 NPT internal Maximum Allowable In
9. y 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 ne Emerson Process Management Regulator Technologies Inc 1982 2009 All Rights Reserved Pro id
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