Emerson 75A Instruction Manual
Contents
1. key 21 When ordering replacement parts reference the key number of each needed part as found in the following parts list Parts List Key Description Part Number 1 Body Bronze NPS 1 2 DN 15 2A940812012 NPS 3 4 DN 20 2D226312012 NPS 1 DN 25 2V361512012 NPS 1 1 2 DN 40 3D174012012 NPS 2 DN 50 3D626712012 NPS 2 1 2 DN 65 3E231012012 2 Spring Case Cast Iron NPS 1 2 DN 15 1D878619042 NPS 3 4 DN 20 00085719042 NPS 1 DN 25 2A480119042 NPS 1 1 2 DN 40 3V361319042 NPS 2 and 2 1 2 DN 50 and 65 00132019042 APPLY GASKALAC P ON PENRO RS NRT mY een RORA wm 7 EZ pra y A wee 2 a 20A5581 B NPS 1 2 3 4 1 AND 1 1 2 BODY DN 15 20 25 AND 40 Figure 2 Type 75A Assemblies Key Description 3 Guide Plug Bronze NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 DN 50 NPS 2 1 2 DN 65 Valve Yoke Bronze NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 DN 50 NPS 2 1 2 DN 65 Valve Disk Holder Bronze NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 DN 50 NPS 2 1 2 DN 65 Diaphragm Head NPS 1 2 DN 15 Steel NPS 3 4 DN 20 Cast Iron NPS 1 DN 25 Cast Iron NPS 1 1 2 DN 40 Cast Iron NPS 2 and 2 1 2 DN 50 and 65 Cast Iron Part Number 0W099412012 1A971912012 1A950812012 1A974612012 1A975212012 0D023212012 1A942712012 1A945512012 1A951412012 2V361412012 2V361612012 2V361712012 1B52. 90112012 1B590212012 1B867312012 1B867712012 1B867912012 1B869812012 1A941524092 1A945619042 1A950919052 1V361219042 1A975819042 ANN lt 7 ZZA D ahs P ZL pe eZ S 2 APPLY GASKALAC 30A5582 A A0211 NPS 2 DN 50 BODY Figure 2 Type 75A Assemblies continued Key Description 7 Diaphragm Nut Steel NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 and 2 1 2 DN 50 and 65 8 Set Screw Zinc plated steel NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 and 1 1 2 DN 25 and 40 NPS 2 and 2 1 2 DN 50 and 65 9 Hex Nut Brass NPS 1 2 and 3 4 DN 15 and 20 NPS 1 and 1 1 2 DN 25 and 40 NPS 2 and 2 1 2 DN 50 and 65 10 Spring Seat Steel NPS 1 2 and 3 4 DN 15 and 20 NPS 1 DN 25 NPS 1 1 2 to 2 1 2 DN 40 to 65 11 Spring Spring wire NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 and 2 1 2 DN 50 and 65 Recommended spare part Part Number 1A941424092 1E478524092 1V361124092 1A974824092 1A982424092 10216032992 1A514428992 1F575328992 1V360928982 1A518014012 1A352414012 1A599314012 1E478424092 1V361024092 1A975424092 1V360527022 1V360627142 1V360727142 1V360827142 10398227042 4 Vf Jazz SAREE FIZZ 2 K a A APPLY GASKALAC 30A5580 A A0212 NPS 2 1 2 DN 65 BODY CV AEAT IT a 17779 Type 75A OOGOOOO OOKQO COOGEE Figure 2 Type 75A Assemblies continued K
3. Instruction Manual Form 511 September 2009 Type 75A Type 75A Water Pressure Regulator Application The Type 75A is designed to reduce domestic or industrial water pressures to a constant pressure thus protecting plumbing fixtures and meters from high pressure surges As shown in Figure 1 it is self contained requiring no external control line for operation Installation Check the unit for shipment damage Clean all foreign material from the pipelines and regulator interior Install the Type 75A in a horizontal line with the spring case above or below the line and with flow through the regulator as indicated by the arrow cast on the body Coat the external threads with pipe compound and draw up the connections tightly but not severely If a snap acting valve solenoid valve is used in the system the snap acting valve should be installed upstream of the Type 75A The Type 75A may be damaged by high shutoff pressure if a snap acting valve is installed downstream Adjustment One spring for each size regulator allows operation over an outlet pressure range of 20 to 80 psi 1 4 to 5 5 bar Maximum inlet pressure is 200 psi 13 8 bar Minimum operating differential pressure is 5 psi 0 34 bar To change the reduced pressure loosen the adjusting screw locknut key 9 and turn the adjusting screw key 8 into the spring case to increase the reduced pressure or out of the case to decrease it Re tighten the locknut w
4. ey Description 12 Diaphragm Neoprene CR NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 DN 40 NPS 2 and 2 1 2 DN 50 and 65 13 Valve Disk Nitrile NBR NPS 1 2 DN 15 NPS 3 4 DN 20 NPS 1 DN 25 NPS 1 1 2 and 2 DN 40 and 50 NPS 2 1 2 DN 65 14 Cap Screw Zinc plated steel NPS 1 2 DN 15 6 required NPS 3 4 DN 20 6 required NPS 1 DN 25 8 required NPS 1 1 2 DN 40 8 required NPS 2 DN 50 10 required NPS 2 1 2 DN 65 4 required 15 Hex Nut Zinc plated steel NPS 1 2 DN 15 6 required NPS 3 4 DN 20 6 required NPS 1 and 1 1 2 DN 25 and 40 8 required NPS 2 DN 50 10 required NPS 2 1 2 DN 65 6 required Part Number 1A941002112 1A946102112 1A951102112 1A974302112 1A975502112 10158203022 10158603022 10158703022 10158903022 10159803022 1B720924052 1A352624052 1A368324052 1A353024052 1A569824052 1A582324052 1A3915X0022 1A352724122 1A346524122 1A353724122 1A341224122 Type 75A Key Description Part Number Key Description Part Number 16 Machine Screw 19 Orifice Brass Bronze NPS 1 2 DN 15 1A8991X0012 NPS 2 DN 50 1A980512012 NPS 3 4 and 1 DN 20 and 25 0V070414012 NPS 2 1 2 DN 65 1A981012012 NPS 1 1 2 and 2 DN 40 and 50 1D567314012 20 Cap Screw NPS 2 1 2 DN 65 J17796X0012 Zinc plated steel 17 Disk Retainer Washer NPS 2 1 2 DN 65 6 required 1A344424052 Brass 21 Nameplate not shown 11B6112xX012 NPS 3 4 DN 20 0B078214012 22 Drive Screw not s
5. hown 1A676728992 NPS 1 DN 25 00147614012 NPS 1 1 2 and 2 DN 40 and 50 1A975014012 NPS 2 1 2 DN 65 0D023314012 Recommended spare part Industrial Regulators Natural Gas Technologies TESCOM 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 China 201206 Tel 86 21 2892 9000 Europe Bologna Italy 40013 Tel 39 051 4190611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 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 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 Emerson Process Management Tescom Corporation USA Headquarters Elk River Minnesota 55330 2445 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 while every effort has bee
6. n 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 Dr i Miana Aart Emerson Process Management Regulator Technologies Inc 1945 2009 All Rights Reserved Pre 2SS Mana ment
7. ww emersonprocess com regulators wo0s7 1 Figure 1 Type 75A Water Pressure Regulator Maintenance To replace the valve disk key 13 unscrew the guide plug key 3 from the body The valve disk holder key 5 may now be unscrewed from the yoke key 4 Be careful not to twist and rupture the diaphragm key 12 LS Reet D100254x012 Type 75A Note A piece of hex bar stock can be drilled out and slipped over the disk holder shaft to fit inside the holder This simplifies removal of the holder from the yoke Use the following sizes of hex bar NPS 1 2 DN 15 body 7 8 inch 22 mm hex NPS 3 4 DN 20 body 1 inch 25 mm hex NPS 1 or 1 1 2 DN 25 or 40 body 1 1 4 inch 32 mm hex NPS 2 DN 50 body 2 inch 51 mm hex NPS 2 1 2 DN 65 body 2 1 2 inch 63 mm hex To replace valve disk unscrew the disk retaining screw key 16 remove old disk key 13 apply gasket sealer to new disk and install To replace the diaphragm first remove tension of the regulator spring key 11 by turning out the adjusting screw key 8 Remove the bolting that holds the spring case key 2 to the body and lift off the casing and regulator spring Unscrew the diaphragm nut key 7 and diaphragm head key 6 Replace the diaphragm Parts Ordering When corresponding with your local Sales Office or sales representative about this regulator always reference the type number which is found on the nameplate
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