Screw PumpsSN Series Utilization The SN series from ALLWEILER is utilized in all segments of industry where lubricating liquids are pumped that do not contain abrasive components and will not chemically attack the pump materials. Pumped liquids include a variety of oils and oil products (including heating, lubricating, hydraulic oils and bitumen), greases, chemical products like polyols, isocyanates, paints, lacquers, adhesives, glycerin, resins, and other lubricating media like paraffin, wax, soap, viscose, cellulose pulp, glucose, syrup, salves, pastes, and more. Main fields of application Main fields of application are oil-firing and power engineering; hydraulic, maritime, and offshore engineering; machine tools; the chemical and petrochemical industries, the food industry, and the pulp and paper industry. Design The SN series is a three-screw, self-priming screw pump with hardened and ground spindles that rotate in a replaceable casing insert. The idler screws are hydraulically driven and axial thrust is fully compensated hydrostatically. A groove ball bearing lubricated with the pumped liquid or an external greaselubricated groove ball bearing holds the drive screw in place. The shaft is sealed with either shaft seal rings or mechanical seals. A return pipe connects the seal chamber with the suction chamber. As a result, regardless of the current discharge pressure, only the suction/inlet pressure will affect the shaft seal. Performance data c2 Capacity Discharge pressure Inlet pressure Liquid temperature Q pd ps t up to up to up to up to 5.300 l/min e bar f 64 bar 10 °C g +150 c The performance data overview is based on drive speeds that occur when using three-phase motors in a 50-Hz power grid. Refer to the proposal and order confirmation for exact operation limits. d The specified operation limits are maximum values that may have to be reduced in individual cases depending on technical variations. Refer to the respective order documentation for binding values. e Capacity of 3600 l/min is standard; 5300 l/min in a special version. f Pressure limits depend on the casing material. g Specified temperature limits depend on the seal. Please consult your ALLWEILER representative specified range. regarding temperatures above the Functionality Specially-shaped thread flanks cause the three spindles to form sealed chambers; rotation of the spindles then causes the contents of the chambers to move continuously in the axial direction from the pump's suction side to its pressure side. Despite rotation of the spindles, no turbulence results. Constant chamber volumes eliminate squeezing forces, thereby delivering virtually pulsation-free operation. Flanges Suction branch: Discharge branch: up to DN 150 according to DIN EN 1092-2 PN 16 up to DN 200 according to DIN EN 1092-2 PN 10 PN 40 according to DIN EN 1092-2 (pump casing in EN-GJL-250) PN 64 according to DIN EN 1092-2 (pump casing in EN-GJS-400-15) Other flanges (such as ANSI-B 16.1 or 16.5, SAE, JIS, BS etc.) are available upon request. Shaft coupling and safety guarding When the scope of delivery includes a pump, base plate, and shaft coupling (according to DIN 740), or if a motor bracket or wall-mounted/foot-mounted motor bracket are provided, then safety guarding according to DIN EN 294 will also be included. Compliance with DIN EN 809 safety requirements is ensured. Shaft sealing Mechanical seal, uncooled Model code Rotating ring Counter ring unbalanced 6.7 and 12.1 silicon carbide hard carbon antimony impregnated CrNiMo steel Viton 6.9 and 8.9 silicon carbide silicon carbide Metal parts CrNiMo steel O-rings Viton Material code AQ1VGG Q1Q1VGG DIN EN 12 756 Max. inlet pressure 10 bar c …D 80 ° C Permissible liquid …E 120 ° C temperature with bearing version… …U 150 ° C Other mechanical seals available upon request Shaft seal rings uncooled Model code (D) 4.2 4 Shaft seal ring material Perbunan (NBR) Gylon Max. inlet pressure 1.5 bar c Permissible liquid 80 ° C temperature c Maximum permissible inlet pressure is dependent on discharge pressure, the liquid being pumped, viscosity, speed, and pump size. Please consult your ALLWEILER representative. 1 suitable measures must be provided to prevent impermissible warming of the pump surfaces in the event of disturbance. shaft seal uncooled. External ball bearing. If pumps are requested without an installed pressure relief valve. no shaft seal Other bearing designs upon request D Heating Series electric with steam or heat transfer liquid Heating element (vers. SNGS). 50 or 60 Hz. X) Heating cartridge (vers. P) SNH/SNGH X X X SNF/SNGF X X X SNS/SNGS X X Heating jacket (vers. Note: When operating the pump in category 2. lubricated by pumped liquid. Actual airborne sound level depends strongly on the installation conditions! Model code SN H 40 E R 46 U 4 QM E – W1 X Note: Pumps in double jacket only in welded-steel (special) version. these must be requested separately. lubricated with pumped Q liquid. SNGF). depending on speed. shaft seal uncooled. design type B3 or V1. Classification into temperature classes according to EN 13463-1 depends on the temperature of the pumped liquid. lubricated through grease E nipple with grease regulator. 2 Size c Drive screw type Screw pitch (R=right/L=left) Screw pitch angle in degrees Bearing type Shaft seal Shaft seal annex (optional) Casing heating Material code c theoretical capacity expressed in l/min. overload protection must be provided in the controller or as a pipeline-mounted valve (see separate brochure). cannot be DQ relubricated. shaft seal uncooled. This brochure does not provide valve characteristic curves and sectional drawings. insulation class B. Y) The provided specifications are reference values. cannot be relubricated. no shaft seal External ball bearing. Refer to the proposal or order documentation for the maximum permissible liquid temperature for the respective temperature classes. unheated Noise levels The pump design provides gentle. Series Construction type Pressure relief valves These pumps can be delivered with built-on pressure relief valves (see page 9). Drive The pumps can be coupled to different types of electric motors or to other drive machines either directly (series SNH. . motor windings for 400 VΔ. pump size. uniform movement of the liquid with low noise levels. degree of protection IP 55 according to IEC standard. or by way of wall-mounted or foot-mounted brackets (series SNF. unheated External ball bearing. Uniform pumping elements with differing types of construction and installation.SN Series Bearing and lubrication Bearing Version U Description Internal ball bearing. the pumps are meant for use with surfacecooled three-phase squirrel-cage motors. SN type series. by way of a motor bracket (series SNS. at normal pitch Installation types and modular system Three-screw pumps. unheated Internal ball bearing. Explosion protection The pump fulfills the requirements according to EU explosion-protection directive 94/9/EC (ATEX 100a) for devices in device class II. category 2 G. and installation. In most cases. The noise level lies between 50 and 100 dBA. lifetime sealed. lifetime sealed. SNGH). E) Heating shell (vers. 4 5.5 6.2 8.5 3. values depend on the individual viscosity and pump speed.5 3.7139) 16MnCrS5 (nitrided steel 1.5 3.0 5. 3 .0 3.0 c 7. Refer to the NPSH characteristic curves for this information.0 3.0 3.0 3.7 3.3 3.6 4.3 5.0 3.SN Series Materials Description Pump casing Casing insert Pump cover.0 6. NPSH values NPSHreq.0 3.0 5.9 3.2315 16MnCrS5 (nitrided steel 1.4 3.1 6.2 6.6 4.5 3.2 4.6 4.7 c 8.9 c 6.6 6.0 5.2315 16MnCrS5 (nitrided steel 1.9 6.7 c - Note: Exact NPSHreq.3 4.0 3. 0.0 5.0 3.0 5.0 3.0 6.1 3.0 5.0 5.2 4.7 3.8 6.3 4.1 3.2 6.0 6.0 3.7139) 16MnCrS5 (nitrided steel 1.4 5.7139) AlMgSi1 3.2 3.4 3.8 3.7139) AlMgSi1 3.2315 16MnCrS5 (nitrided steel 1.0 3.2 4.8 7.0 3. Grid frequency Motor speed 40-38 40-46 40-54 80-36 80-42 80-46 80-54 120-42 120-46 120-54 210-40 210-46 210-54 280-43 280-46 280-54 440-40 440-46 440-52 440-54 660-40 660-44 660-46 660-51 660-54 940-42 940-46 940-50 940-54 1300-38 1300-42 1300-44 1300-46 1300-54 1700-42 1700-46 2200-42 2200-46 2900-40 3600-46 c inlet pressure required 50 Hz 1450 1/min 3.6 6.7139) AlMgSi1 3.2 3.1 3.5 8.0 5. nondrive end Pump cover.2315 W1 EN-GJL-250 EN-GJL-250 W2 EN-GJL-250 SIL 70 (Silafont) EN-GJL-250 EN-GJL-250 EN-GJL-250 c refer to page 11 for additional information about the welded steel version.0 6.1 7.4 4.5 m safety margin.0 3.6 6. Values applicable to air-free liquids.0 3.4 c 8.8 4.0 5.0 6.6 4.0 3.9 60 Hz 2900 1/min 3.6 7.0 3.7139) AlMgSi1 3. drive end Drive and idler screws Balance bushes Materials W61 W33 EN-GJL-250 EN-GJS-400-15 EN-GJL-250 SIL 70 (Silafont) W67 EN-GJS-400-15 EN-GJL-250 W22 c welded steel EN-GJL-250 EN-GJL-250 EN-GJL-250 EN-GJS-400-15 EN-GJS-400-15 steel EN-GJL-250 EN-GJL-250 EN-GJL-250 steel steel steel 16MnCrS5 (nitrided steel 1.9 3.7 - 3500 1/min 3.1 4.5 3.0 3.0 7. [m] at ν = 40 mm²/s incl.5 6.0 3.4 6.0 3.8 5.9 6.0 3.6 3.0 5.8 7.0 3.4 6.0 3.4 6.2 6.0 7.8 7. Please consult your ALLWEILER representative about liquids containing undissolved air.6 3.6 3.0 3.0 3.3 3.0 5.5 8.0 3.5 3.9 3.4 c - 1750 1/min 3.0 3. 1 225 9.7 811 100 922 117 1002 123 1124 138 1223 149 1440 179 1756 212 1935 240 1743 214 2060 252 - 37.9 457 59.8 560 44.4 3523 39.53 139 1.74 109 4.5 2252 87.34 770 8.2 282 37.95 333 3.9 607 76.4 112 15.5 1114 14.25 125 10.5 480 37.8 61.91 192 7.9 2.02 138 2.5 838 14.1 675 54.91 162 6.5 1329 16.8 4.2 812 101 787 97.8 543 42.8 216 17.61 238 9.3 1159 89.63 571 6.52 101 1.89 82.01 93 7.02 164 2.1 3.4 890 34.5 490 62.41 117 1.9 508 19.6 1022 79 1252 97.48 134 5.19 364 3.4 9.2 996 38.8 6.2 0.4 1473 22.1 671 52.9 - 34.6 332 42.5 3.31 934 10.9 4.3 150 11.9 8.7 888 34.9 1469 17.92 241 2.1 274 11.8 3416 42.8 7.7 837 64.08 69.8 8.2 147 19.7 2.2 1191 48.5 1516 59.5 54.9 495 20.81 791 9.13 96.2 1442 54.64 694 10.4 76.9 146 11.63 255 9.1 921 11.1 477 18.5 1092 41.2 969 74.52 63.8 292 38.54 49.44 97.1 2132 28.3 62.5 696 55.4 2.5 315 24.44 238 4.65 119 4.5 1279 14.6 363 14.14 129 1.1 348 27.6 183 24.5 1.2 806 63.2 1503 57.6 185 14.02 97.8 620 77.2 1291 51.7 738 28.57 48.8 1072 16.95 592 9.4 7 108 9.2 1916 22.5 407 16.93 653 7.7 0.96 489 7.4 2318 28.2 5.48 375 5.64 53.8 593 46.3 619 7.9 416 16.55 132 5.1 1349 104 1585 120 1772 136 2071 156 2621 201 3321 247 56.5 2170 88.11 200 2.99 69.9 0.5 0.6 209 28.28 32.2 278 11.6 155 12.8 511 19.2 0.2 1182 90.35 313 12. 4 64 1450 1/min - .8 538 20.2 12.65 66.3 661 51.4 1423 17.3 118 15.9 540 22.79 68.65 198 2.1 1527 62.08 738 9.5 1.99 227 9.9 13 134 18.8 395 16.78 557 6.1 1378 53.2 2148 81.68 91.9 1465 113 1681 127 1486 116 1801 137 2009 154 2377 179 1785 139 2118 163 - 21.8 1624 61.6 9.6 1.31 112 1.28 98.2 814 105 1002 126 1174 149 1588 199 2089 260 - 66.56 28 4.55 79.6 3.6 365 48.9 659 25.09 54.6 11 90.88 88.4 210 17.8 462 59.6 - 24.3 861 34.7 4.4 0.6 165 23.3 383 30 484 37.7 930 74.68 165 1.5 869 35.8 2680 31.3 655 26 577 24.9 1.1 3.7 901 35.6 2.8 465 57.4 1849 71.9 656 27.94 671 10.27 404 6.2 340 13.4 1020 38.5 1053 11.9 600 46.38 878 9.92 274 3.06 419 5.7 2215 32.4 1232 95 1326 101 1451 110 1898 144 1658 127 1943 146 2174 166 2535 190 3214 244 4059 301 69.28 773 9.92 67.53 555 8.13 531 6.7 548 44.4 632 48.7 1052 40.96 510 5.2 2053 22.72 133 5.3 1560 20.55 114 1.4 5.5 3.53 674 8.8 2.6 1.1 692 7.68 196 3.8 1130 43.6 1.7 1723 67 2007 76.33 297 12 325 13.6 1064 11.4 2.6 3.4 6.6 392 31 439 36.3 488 37.41 110 4.39 168 2.5 2075 82.1 823 35.5 808 103 - 53.2 7.5 2215 25 2823 33.5 179 14.6 1.5 4.34 529 6.93 60.52 251 2.5 1375 105 1044 80.4 1234 46.2 1548 18.73 79.8 7.8 80.6 9.3 678 28.3 401 15.97 207 2.3 129 5.66 507 7.8 99 13.19 115 1.1 714 28.4 242 19.8 2.5 850 65.8 2.11 233 3.1 158 13.3 625 24 726 28.5 4.69 107 4.7 68 0.16 931 10.3 2500 31.71 643 8.9 1843 73.65 76.42 46.1 621 48.3 1097 12.4 964 75 1028 79.7 267 35.4 538 21.8 206 26.4 0.1 303 38.5 1046 43.8 687 53.6 211 27.8 393 30.9 106 1.06 441 5 416 5.9 143 18.5 46 1.19 195 7.4 1856 29.3 377 47.3 223 30.1 230 10.7 0.5 7.97 343 4.29 172 6.55 157 6.4 1696 17.8 1284 50.41 310 4.5 1413 110 - 27.1 541 68.17 100 8.82 58.6 241 19 221 18.23 216 2.9 896 34.2 2730 105 3430 128 59.2 854 65.2 317 12.7 373 46.9 291 23.8 255 32.6 1082 42.8 5.3 4.1 834 31.81 139 2.4 364 46.33 36.8 882 12.6 228 29.44 106 4.1 731 56.72 122 10.4 177 22.06 730 8.4 224 17.6 125 10.72 185 2.7 586 22.7 - 28.99 84.3 2.1 88.91 252 10.3 169 22.5 2613 99.8 115 15.3 504 63.2 642 79.1 1414 54.69 40.4 1982 74.15 61.5 515 40 457 36.6 439 56.63 56.7 1127 13.4 623 24.7 232 19.5 1778 22 2062 24.66 293 3.5 523 40.SN Series Performance table (viscosity v = 40 mm2/s) Grid frequency 50 Hz Pressure [bar] Motor speed 40-38 40-46 40-54 80-36 80-42 80-46 80-54 120-42 120-46 120-54 210-40 210-46 210-54 280-43 280-46 280-54 440-40 440-46 440-52 440-54 660-40 660-44 660-46 660-51 660-54 940-42 940-46 940-50 940-54 1300-38 1300-42 1300-44 1300-46 1300-54 1700-42 1700-46 2200-42 2200-46 2900-40 3600-46 Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] Q [l/min] P [kW] 5 20 60 Hz 40 64 5 20 40 2900 1/min 1450 1/min 2900 1/min 1450 1/min 2900 1/min 1450 1/min 2900 1/min 1750 1/min 3500 1/min 1750 1/min 3500 1/min 1750 1/min 3500 1/min 1750 1/min 3500 1/min 30.5 1878 26.33 274 2.11 282 4.79 41.07 334 5.3 328 12.9 1732 67.2 1563 23.1 838 66.3 603 6.9 1219 47.8 575 22.98 96.99 41.2 1218 17.3 1066 16.5 418 16.5 4.15 91.3 1276 14.5 1823 76.73 332 4.5 3322 129 4167 157 73.4 9.2 2443 94.57 74.4 1776 22.02 97.9 7.75 84.2 191 27.6 1237 13.7 3.2 283 22.3 0.1 1275 54 1445 60 - 31.8 169 22.4 763 29.73 135 2.1 13.6 261 21.4 1036 13.5 385 30.2 1.2 1296 21.2 181 14.21 37.9 262 3.42 40.3 3.2 265 21.87 191 7.0 1.1 242 33.96 46.6 893 12.9 860 67.6 1499 16.2 300 23.3 1050 80 1153 90.17 436 4.2 11.6 3.4 703 27.8 1175 13.86 75.41 70.06 51.5 1180 44.57 122 10.8 2.18 189 8.8 390 31.1 842 65.8 639 50.75 59.2 574 72.9 6.8 180 14.11 259 10.7 937 11.23 105 8.3 500 40.38 206 8.7 1003 40 1052 43.8 311 24.7 52.4 11 87.31 140 5.5 1318 18.9 195 15.4 995 122 1226 150 1378 Note: Refer to proposal or contract documentation for exact performance data at individual operating points.9 1000 78 1078 83.1 475 19.62 156 6.3 657 83.13 83.8 75.1 129 10.2 1259 95.2 1705 19.6 123 16.6 1649 62.6 313 25.8 4261 49.35 152 1. mechanical seal. SNEF. non-drive end or round foot (on SNS/SNG) Stuffing box casing/bearing cover Pump foot Cover plate Balance bush c Seal cover/gland Greasing chamber disc Drive screw c Idler screw c Spacer bush Pressure spring Pipe Gasket c Gasket c Round seal ring Gasket c Gasket c Part No. . SNGF. drive end Pump cover. SNS and SNGS are not shown explicitly because they differ only in how they are installed. internal bearing. Cheese head screw 79 Spacer ring 80 Supporting washer 81 Mechanical seal c 83 Shaft seal ring c 107 Support ring 108 Spacer bush 109 Hexagon screw 110 Heating chamber/heating shell 120 Gasket c 121 Cheese head screw 122 Screw plug 123 Seal ring c 124 Gasket 125 Heating element 126 Cheese head screw c 127 Thermostat 129 Seal ring 130 c available as spare part Pump sectional drawing SNH. 5 . 1 2 3 4 5 6 7 8 9 10 12 13 16 19 20 21 22 23 24 25 Description Gasket c Seal ring c Seal ring c Groove ball bearing c Circlip Supporting washer Circlip Ball Key Spring dowel Screw plug Screw plug Stop screw Screw plug Grease nipple Cheese head screw Cheese head screw Cheese head screw Cheese head screw Cheese head screw Hexagon head screw Part No. SNF. size 40-660 Note: Series SNE. 26 27 28 34 35 36 37 40 41 42 46 47 48 49 50 51 52 53 54 55 57 Description Part No. SNGH.SN Series List of components Description Pump casing Casing insert c Pump cover. U version. seal 6 SN. seal . internal bearing..ER.E.D.. external bearing...U3. mech.. mech. mech. seal. cannot be relubricated.SN Series Sectional drawings..ER. sizes 940-3600 SN..ER.. internal bearing SN.ER. internal bearing. can be relubricated.U. external bearing. 2 shaft seal rings Sectional drawing of external bearing SN. only for welded steel version) Pump dimensions and installation plan Pump and unit dimensions of all series can be generated and retrieved individually through ALL2CAD..allweiler.ER. heating version P (heating cartridge) SN....SN Series Sectional drawing of heating SN.ER.de .. heating version E (electric heating elements) SN. ALL2CAD is available online at the ALLWEILER service portal at http://service. heating version X (heating shell) SN... 7 ..ER... heating version Y (double jacket..ER.. SNS. for ∆T = 25 ° C 50 ° C 75 ° C 100 ° C 60 120 240 320 . SNF. SNGS: Pump size 40 80 120 210 280 440 660 940 1300 1700 2200 2900 3600 Version X (heating shell) Version P (heating cartridge) Connection (Ø in inches) Connection (Ø in mm) G 1/4 G 1/4 G 1/4 G 1/4 G 3/8 G 3/8 G 3/8 G 3/8 G 1/2 G 1/2 G 1/2 G 1/2 G 1/2 18 18 18 18 18 18 22 22 22 22 22 22 22 c not applicable for welded version 8 Version E = with heating elements. electric) Heating output [W] (2 heating elements) 240 260 300 420 460 460 680 880 1000 1340 1340 1600 1600 Connection (Ø in inches) G 3/4 G 3/4 G 3/4 G1 G1 G1 G 1 1/4 G 1 1/2 G 1 1/2 G2 G2 G2 G2 Heat-up time of the pump in minutes.SN Series Heating c Series SNH. electric Version P = with heating cartridge for steam or heat transfer liquids Version X = with heating shell for steam or heat transfer liquids Version E (with heating elements. SNS.5-38 900 0-98 660 0-18 1800 0-98 0-13. DV = Pressure relief valve. directly pilot-operated DVI = Pressure relief valve.5-38 900 0-98 940 0-18 1800 0-98 0-16 1300 2500 1700 2500 2200 2500 2900 3600 3600 3600 0-98 0-16 0-98 0-16 0-98 0-9 0-98 0-9 0-98 Valve type Valve construction Return connection DS 35 d DT 35 d DS 35 d DT 35 d DS 41 DS 38 e DVI 38 e DS 41 DS 38 DVI 38 f DS 44 DT 44 DV 44 DVI 44 DVS 44 DS 44 DT 44 DV 44 DVI 44 DVS 44 DS 44 DT 44 DV 44 DVI 44 DVS 44 DS 47 DV 47 DVI 47 DS 44 DT 44 DV 44 DVI 44 DVS 44 DS 47 DV 47 DVI 47 DS 50 DV 50 DVI 50 DVS 50 DS 50 DV 50 DVI 50 DVS 50 DS 50 DV 50 DVI 50 DVS 50 DS 56 DV 56 DVS 56 DS 56 DV 56 DVS 56 A Bd C Dd Pipe thread G 1 A Bd C Dd Pipe thread G 1 Pipe thread G 1 ABCD Pipe thread G 1 1/2 Pipe thread G1 ABCD DT = Pressure relief valve with cup springs. ship version for vertically installed pumps ABCD -B-D DS = Pressure relief valve with helical spring. Pump size 40 80 Max.5 13. see dimension drawings from ALL2CAD (http://service. directly controlled.5 13. SNGS. indirectly pilot-operated Pipe thread G 1 1/2 DVS = Pressure relief valve.5-38 900 0-98 0-13. valve types DS 38 and DVI 38 can be used only with intermediate piece (between pump casing and round foot) PN 16 DIN EN 1092-2 DN80 f on pump type SNS 210.5-38 440 900 0-98 0-13.5 13. installed on SNH.de) for valve dimensions. permissible working pressurec 0-38 38-58 0-38 38-58 0-38 0-44 0-98 0-38 0-44 0-98 0-13. pilot-operated.allweiler. directly controlled.5 13. PN 16 DIN EN 1092-2 DN65 A = Circulating valve B = Circulating valve with manual regulation ABCD -B-D PN 16 DIN EN 1092-2 DN65 C = Return valve PN 16 DIN EN 1092-2 DN65 c only return valve (type C or D) allowed for differential pressure more than 40 bar PN 16 DIN EN 1092-2 DN80 d valve types DS 35 and DT 35 with manual regulation (types B and D) cannot be used with pump types SNS 40 and SNS 80 PN 16 DIN EN 1092-2 DN65 e on pump type SNS 120. SNGF series pumps (not welded versions). valve type DVI 38 can be used only with intermediate piece (between pump casing and round foot) D = Return valve with manual regulation ABCD -B-D ABCD -B-D ABCD -B-D ABCD -B-D ABCD -B-D PN 16 DIN EN 1092-2 DN100 ABCD -B-D PN 16 DIN EN 1092-2 DN100 ABCD -B-D ABCD -B-D ABCD -B-D PN 16 DIN EN 1092-2 DN100 PN 16 DIN EN 1092-2 DN125 PN 16 DIN EN 1092-2 DN125 9 .SN Series Pressure relief valves Pressure relief valves. SNF. permissible capacity 200 200 210 120 550 210 210 280 550 Max. valve versions in materials EN-GJL-250 and EN-GJS-400-15. Hardened and ground screws provide for long service life. A variety of material combinations enable variable adaptation to special operating conditions. Application-specific shaft seals (shaft sealing rings. Substantially dimensioned ball bearings make the pump universally applicable in a wide range of viscosities. Optional direct attachment of a pressure relief valve as overload protection increases operational reliability. 10 Balance pistons on the screws reduce wear and ensure minimal loads on the actuation system by balancing out axial thrust.SN Series Benefits of SN series Replacing insert unit while pump casing is installed is quick and easy. . A variety of sizes and screw pitch angles provides for fine capacity gradation and optimized efficiency across the entire performance range. various mechanical seals. or magnetic coupling) increase flexibility. The SN series fulfills the requirements according to EU explosion protection directive 94/9/EG (ATEX 100a). Modular system enables lower spare parts stocks and other design types. 2 QM-W61 version for pumping isocyanates and polyols Special features: The following diagram applies to the SNS series in the welded-steel version with flanges according to DIN: For pumping isocyanates and polyols that tend to crystallize when released into the atmosphere. SNC(X)... Maximum viscosity is 6000 mm2/s. Shaft seal rings teflonized. 11 . SN series in SN. The pumps do not have a shaft seal. Maximum liquid temperature of 250 °C. Available in sizes 40 to 1300.).D4. Version without non-ferrous metals in material combination W61. and odorous media). SN series in SN. shaft seals.. Maximum capacity of 1700 l/min. harmful. Available in sizes 40 to 1300. Refer to brochure VM 645 for more information. Also available in hermetically sealed version with magnetic drive. Version without non-ferrous metals in material combination W61. The magnetic coupling’s containment can hermetically seal the pump. and SNFGX can maintain pumping for up to an hour in the opposite rotational direction. with quench.M version with magnetic coupling Special features: For applications that require the use of pumps without shaft seals (such as moving heavy fuel oil in Marine applications or pumping poisonous. More extensive information about this and all other variations is available upon request. Additional information in brochures VM 677 and VM 679. quenches and special spindle versions are available.D 14 BS-W61 version for pumping refrigerator oil Special features: For pumping lubrication oils with traces of refrigerants (such as ammonia. etc.Other versions of the SN Series Other versions of the SN series In addition to the versions described above.. Refer to brochure VM 740 for more information.AR. SNG(X). Refer to brochure VM 771 for more information. Standard balanced bellow mechanical seal. bearings. The following diagram is applicable for the welded-steel versions (without double mantle) of series SNH and SNF with flanges according to DIN: SN series in SN.. (in size 1300-54 at 1450 1/min). Please observe the following diagram with installed pressure limiting valves.AR. SNGX. Maximum capacity of 1700 l/min. (in size 1300-54 at 1450 1/min).AR. maximum viscosity 2000 mm²/s. SNFG(X) for installation on gear box Special features: External pump for fast-running gear box for pumping lubrication and gear-box oils. Freon. other application types. Also available with pump casing in EN-GJS-400-15 (material combination W5). Refer to brochure VM 687 for more information. The pumps are driven directly by the external gear box by way of a pinion pulled onto the drive screw. SN series in welded steel version Special features: flanges according to DIN and ANSI are available API 676 version is available heating with double jacket is available Only pressure relief valves for installation in a pipe (see separate brochure) are possible for pumps in welded-steel version with double jacket and pumps in welded-steel version with flanges according to API 676. Series SNCX. Maximum viscosity is 75 mm²/s. materials. The most common variations are described briefly below. Magnetic forces transfer torque from the motor to the pump within the magnetic coupling.. SN Series Performance overview for three-screw pumps Other series of three-screw. Refer to the following overview (specified performance based on 50-Hz speeds). ALLWEILER AG Postfach 1140 78301 Radolfzell Allweilerstr. 795 568 .08 – ID No.allweiler.com VM 617 GB/06. Subject to technical changes. single-channel screw pumps are available for pumping performance outside of the SN series. The specified performance data and all standard references are intended to provide only an overview of the product and its performance! Refer to the respective proposal and order confirmation for exact operation limits. 1 78315 Radolfzell Germany Tel.de Internet: http://www. + 49 (0)7732 86-436 E-mail: service@allweiler. +49 (0)7732 86-0 Fax.