Emerson Type 75A Pressure Reducing Regulator Data Sheet
2015-03-30
: Emerson Emerson-Type-75A-Pressure-Reducing-Regulator-Data-Sheet-681405 emerson-type-75a-pressure-reducing-regulator-data-sheet-681405 emerson pdf
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Bulletin 71.1:75A August 2009 Type 75A Water Pressure Regulator W2248 W0057 EXTERIOR Sectional View For nps 1/2, 3/4, 1, and 1-1/2 (DN 15, 20, 25, and 40) bodies Figure 1. Type 75A Regulator Introduction The Type 75A regulator is designed to reduce domestic or industrial water pressure, thus protecting plumbing fixtures and meters from high-pressure surges. The Type 75A is self-contained, requiring no external control line for operation. If the downstream pressure decreases, the spring force pushes the valve yoke and disk down to open the body port. This permits increased flow and increases outlet pressure to the desired level. The spring for each regulator allows operation over an outlet pressure range of 20 to 80 psig (1,4 to 5,5 bar). The outlet pressure setting is easily changed by turning the adjusting screw. D100116X012 Downstream pressure is directly registered under the diaphragm. As the downstream pressure increases, the diaphragm force overcomes the spring compression, causes the valve disk to rise, and reduces flow through the regulator. www.emersonprocess.com/regulators Bulletin 71.1:75A Specifications Body Size NPS 1/2, 3/4, 1, and 1-1/2 (DN 15, 20, 25, and 40) with integral cast seats NPS 2 and 2-1/2 (DN 50 and 65) with threaded-in seats Minimum Operating Differential(1) 5 psi (0,34 bar) Maximum Inlet Pressure(1) 200 psig (13,8 bar) Construction Materials Body: Bronze Spring Case: Cast iron Threaded-in Orifice (NPS 2 and 2-1/2 (DN 50 and 65) units only): Bronze Valve Disk and Holder: Nitrile (NBR) and bronze Diaphragm: Nitrile (NBR) Outlet Pressure Ranges 20 to 80 psig (1,4 to 5,5 bar) Maximum Allowable Outlet Pressure(1) 10% above spring setting, or 5 psig (0,34 bar) above setting, whichever is greater Maximum Operating Temperature(1) -20° to 150°F (-29° to 66°C) 1. The pressure/temperature limits in this bulletin or any applicable standard limitation should not be exceeded. Table 1. Capacity Chart for Type 75A Regulator CAPACITIES IN GPM (l/min) OF WATER BODY SIZE, NPS (DN) Droop, PSIG (bar) 5 (0,34) 7 (0,48) WIDE-OPEN CV FOR RELIEF SIZING 10 (0,69) 15 (1,0) 1/2 (15) 3/4 (20) 8 (30,3) 16 (60,6) 10 (37,9) 20 (75,7) 14 (53,0) 28 (106) 19 (71,9) 40 (151) 4.3 8.4 1 (25) 1-1/2 (40) 25 (94,6) 50 (189) 33 (125) 65 (246) 45 (170) 85 (322) 60 (227) 115 (435) 13.5 28.0 2 (50) 2-1/2 (65) 75 (284) 115 (435) 95 (360) 140 (530) 125 (473) 185 (700) 175 (662) 260 (984) 39.0 64.0 (1) 1. The 7 psig (0,48 bar) offset pressure and the related capacities are considered the upper limits of flows consistent with good piping practices and maximum fluid velocities of 10 feet per second (3,05 m/s). 2 Bulletin 71.1:75A + 5 (+ 0,34) 0 (0) Offset, PSIG (bar) - 5 (- 0,34) - 7 (-0,48) - 10 (-0,69) to 320 at -20 - 15 (-1,0) NPS 2-1/2 (DN 65) - 20 (-1,4) 0 (0) NPS 1/2 (DN 15) 20 (75,7) NPS 3/4 (DN 20) 40 (151) NPS 1 (DN 25) 60 (227) 80 (303) NPS 1-1/2 (DN 40) 100 (379) 120 (454) 140 (530) NPS 2 (DN 50) 160 (606) 180 (681) 200 (757) 220 (833) 240 (908) 260 (984) Water flow, gpm (l/m) Figure 2. Type 75A Sizing Curves Overpressure Protection As is the case with most regulators, Type 75A has maximum inlet pressure ratings which exceed the outlet pressure ratings. Overpressuring any regulating equipment may be hazardous. If actual inlet pressure can exceed the outlet pressure ratings, some type of overpressure protection is needed. Sizing Information Flow capacity and the maximum permissible offset pressure that the system can tolerate determine the correct regulator size for your application. Consult the Type 75A Sizing Curves (Figure 2) and the Capacity Chart (Table 1) to size the regulator. Several choices may provide the required flow rate. For example, if desired water flow is 30 GPM (114 l/m), the first intersecting curve (Figure 2) is that of the NPS 3/4 (DN 20) regulator. At that point, offset is 11 psi (0,76 bar), which is outside the limits of good piping practice. Moving upward again, the next intersecting curve is that of the NPS 1 (DN 25) regulator. Here, offset is 6 psi (0,41 bar). This rating is permissible and the NPS 1 (DN 25) regulator is acceptable. Ordering Information In order to prevent delays in order processing, please specify type numbers and regulator size clearly. 3 Bulletin 71.1:75A B a DIMENSIONS, INCHES (mm) BODY SIZE, nps (DN) A B C 1/2 (15) 3/4 (20) 9.75 (248) 11.25 (286) 7.12 (181) 8.38 (213) 4.31 (109) 5.44 (138) 3.75 (95) 1.88 (48) 4.25 (108) 2.12 (54) 1 (25) 1-1/2 (40) 12.25 (311) 13.62 (346) 9.12 (232) 9.88 (251) 6.62 (168) 8.19 (208) 4.75 (121) 5.88 (149) 2.38 (60) 2.94 (75) 2 (50) 2-1/2 (65) 18.62 (473) 13.88 (353) 19.12 (486) 14.12 (359) 9.38 (238) 9.38 (238) 6.38 (162) 7.75 (197) 3.19 (81) 3.88 (99) D E e d c Figure 3. Dimensions Industrial Regulators Natural Gas Technologies TESCOM Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Tescom Corporation USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters Elk River, Minnesota 55330-2445 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 Middle East and Africa Dubai, United Arab Emirates Tel: +971 4811 8100 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. ©Emerson Process Management Regulator Technologies, Inc., 1990; 2009 All Rights Reserved
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