"Люди были изобретены водой для переноса ее из одного места в другое."
Эдвард Форд

Вертикальные многоступенчатые повысительные насосы WATERSTRY SB IE3 - широкий ассортимент в интернет-магазине Антарес. На страницах товаров Вы можете ознакомиться с подробными техническими характеристиками оборудования. Вся продукция проходит строгий контроль качества, подлежат обязательной сертификации и имеет заводскую гарантию. Вертикальные многоступенчатые насосы WATERSTRY SB IE3 купить онлайн в интернет-магазине Антарес. Заказывайте с доставкой по Москве и России. Звоните +7 495 150-17-35.
Waterstry SB IE3 – несамовсасывающие вертикальные многоступенчатые центробежные насосы. Доступны модификации с фланцевым/муфтовым и овально резьбовым присоединениями. Насосная часть состоит из основания и головной части, между которыми располагается набор камер на валу, заключенный во внешний кожух. Вся конструкция стягивается при помощи распорных болтов. Основание имеет всасывающий и напорный патрубки равного диаметра, расположенные на одном уровне по схеме in-line, что облегчает монтаж насоса непосредственно в разрыв трубы. Все насосы оснащены необслуживаемым механическим торцевым уплотнением картриджного типа.
Сфера применения:
| Тип | Артикул | Мощн., кВт | Присоед.раз. | Цена, руб |
|---|---|---|---|---|
| WATERSTRY SB 1-2 | WR20133801-2ST | 0,37 | DN25 | 25 310 |
| WATERSTRY SB 1-3 | WR20133801-3ST | 0,37 | DN25 | 25 500 |
| WATERSTRY SB 1-4 | WR20133801-4ST | 0,37 | DN25 | 26 550 |
| WATERSTRY SB 1-5 | WR20133801-5ST | 0,37 | DN25 | 27 610 |
| WATERSTRY SB 1-6 | WR20133801-6ST | 0,37 | DN25 | 28 660 |
| WATERSTRY SB 1-7 | WR20133801-7ST | 0,37 | DN25 | 29 750 |
| WATERSTRY SB 1-8 | WR20133801-8ST | 0,55 | DN25 | 31 210 |
| WATERSTRY SB 1-9 | WR20133801-9ST | 0,55 | DN25 | 32 260 |
| WATERSTRY SB 1-10 | WR20133801-10ST | 0,55 | DN25 | 33 880 |
| WATERSTRY SB 1-11 | WR20133801-11 | 0,55 | DN25 | 26 440 |
| WATERSTRY SB 1-11 | WR20133801-11ST | 0,55 | DN25 | 34 930 |
| WATERSTRY SB 1-12 | WR30133801-12 | 0,55 | DN25 | 37 430 |
| WATERSTRY SB 1-13 | WR30133801-13 | 0,75 | DN25 | 38 490 |
| WATERSTRY SB 1-15 | WR30133801-15 | 0,75 | DN25 | 40 510 |
| WATERSTRY SB 1-17 | WR30133801-17 | 1,1 | DN25 | 47 720 |
| WATERSTRY SB 1-19 | WR30133801-19 | 1,1 | DN25 | 49 750 |
| WATERSTRY SB 1-21 | WR30133801-21 | 1,1 | DN25 | 52 340 |
| WATERSTRY SB 1-23 | WR30133801-23 | 1,1 | DN25 | 54 430 |
| WATERSTRY SB 1-25 | WR30133801-25 | 1,5 | DN25 | 60 250 |
| WATERSTRY SB 1-27 | WR30133801-27 | 1,5 | DN25 | 62 270 |
| WATERSTRY SB 1-30 | WR30133801-30 | 1,5 | DN25 | 65 980 |
| WATERSTRY SB 1-33 | WR30133801-33 | 2,2 | DN25 | 70 980 |
| WATERSTRY SB 1-36 | WR30133801-36 | 2,2 | DN25 | 73 970 |
| WATERSTRY SB 3-2 | WR20133803-2ST | 0,37 | DN25 | 25 300 |
| WATERSTRY SB 3-3 | WR20133803-3ST | 0,37 | DN25 | 25 490 |
| WATERSTRY SB 3-4 | WR20133803-4ST | 0,37 | DN25 | 26 530 |
| WATERSTRY SB 3-5 | WR20133803-5ST | 0,37 | DN25 | 27 590 |
| WATERSTRY SB 3-6 | WR20133803-6ST | 0,55 | DN25 | 29 030 |
| WATERSTRY SB 3-7 | WR20133803-7ST | 0,55 | DN25 | 30 120 |
| WATERSTRY SB 3-8 | WR30133803-8 | 0,75 | DN25 | 32 580 |
| WATERSTRY SB 3-9 | WR30133803-9 | 0,75 | DN25 | 33 620 |
| WATERSTRY SB 3-10 | WR30133803-10 | 0,75 | DN25 | 35 240 |
| WATERSTRY SB 3-11 | WR30133803-11 | 1,1 | DN25 | 41 460 |
| WATERSTRY SB 3-12 | WR30133803-12 | 1,1 | DN25 | 42 550 |
| WATERSTRY SB 3-13 | WR30133803-13 | 1,1 | DN25 | 43 610 |
| WATERSTRY SB 3-15 | WR30133803-15 | 1,1 | DN25 | 45 620 |
| WATERSTRY SB 3-17 | WR30133803-17 | 1,5 | DN25 | 51 350 |
| WATERSTRY SB 3-19 | WR30133803-19 | 1,5 | DN25 | 53 370 |
| WATERSTRY SB 3-21 | WR30133803-21 | 2,2 | DN25 | 57 950 |
| WATERSTRY SB 3-23 | WR30133803-23 | 2,2 | DN25 | 60 030 |
| WATERSTRY SB 3-25 | WR30133803-25 | 2,2 | DN25 | 62 130 |
| WATERSTRY SB 3-27 | WR30133803-27 | 2,2 | DN25 | 64 140 |
| WATERSTRY SB 3-29 | WR30133803-29 | 2,2 | DN25 | 66 730 |
| WATERSTRY SB 3-31 | WR30133803-31 | 3,0 | DN25 | 75 310 |
| WATERSTRY SB 3-33 | WR30133803-33 | 3,0 | DN25 | 77 330 |
| WATERSTRY SB 5-2 | WR20133805-2ST | 0,37 | DN25 | 25 030 |
| WATERSTRY SB 5-3 | WR20133805-3ST | 0,55 | DN25 | 26 640 |
| WATERSTRY SB 5-4 | WR20133805-4ST | 0,55 | DN25 | 27 830 |
| WATERSTRY SB 5-5 | WR20133805-5ST | 0,75 | DN25 | 28 460 |
| WATERSTRY SB 5-5 | WR30133805-5 | 0,75 | DN25 | 30 220 |
| WATERSTRY SB 5-6 | WR30133805-6 | 1,1 | DN25 | 36 590 |
| WATERSTRY SB 5-7 | WR30133805-7 | 1,1 | DN25 | 37 770 |
| WATERSTRY SB 5-8 | WR30133805-8 | 1,1 | DN25 | 39 590 |
| WATERSTRY SB 5-9 | WR30133805-9 | 1,5 | DN25 | 44 410 |
| WATERSTRY SB 5-10 | WR30133805-10 | 1,5 | DN25 | 45 740 |
| WATERSTRY SB 5-11 | WR30133805-11 | 2,2 | DN25 | 48 850 |
| WATERSTRY SB 5-12 | WR30133805-12 | 2,2 | DN25 | 50 240 |
| WATERSTRY SB 5-13 | WR30133805-13 | 2,2 | DN25 | 52 070 |
| WATERSTRY SB 5-14 | WR30133805-14 | 2,2 | DN25 | 53 260 |
| WATERSTRY SB 5-15 | WR30133805-15 | 2,2 | DN25 | 54 460 |
| WATERSTRY SB 5-16 | WR30133805-16 | 2,2 | DN25 | 55 700 |
| WATERSTRY SB 5-18 | WR30133805-18 | 3,0 | DN25 | 65 240 |
| WATERSTRY SB 5-20 | WR30133805-20 | 3,0 | DN25 | 67 700 |
| WATERSTRY SB 5-22 | WR30133805-22 | 4,0 | DN25 | 74 820 |
| WATERSTRY SB 5-24 | WR30133805-24 | 4,0 | DN25 | 78 220 |
| WATERSTRY SB 5-26 | WR30133805-26 | 4,0 | DN25 | 80 660 |
| WATERSTRY SB 5-29 | WR30133805-29 | 4,0 | DN25 | 84 880 |
| WATERSTRY SB 5-32 | WR30133805-32 | 5,5 | DN25 | 106 160 |
| WATERSTRY SB 5-36 | WR30133805-36 | 5,5 | DN25 | 112 360 |
| WATERSTRY SB 10-2 | WR30133810-2 | 0,75 | DN40 | 35 010 |
| WATERSTRY SB 10-3 | WR30133810-3 | 1,1 | DN40 | 42 760 |
| WATERSTRY SB 10-4 | WR30133810-4 | 1,5 | DN40 | 48 190 |
| WATERSTRY SB 10-5 | WR30133810-5 | 2,2 | DN40 | 52 380 |
| WATERSTRY SB 10-6 | WR30133810-6 | 2,2 | DN40 | 54 580 |
| WATERSTRY SB 10-7 | WR30133810-7 | 3,0 | DN40 | 63 780 |
| WATERSTRY SB 10-8 | WR30133810-8 | 3,0 | DN40 | 65 980 |
| WATERSTRY SB 10-9 | WR30133810-9 | 3,0 | DN40 | 68 930 |
| WATERSTRY SB 10-10 | WR30133810-10 | 4,0 | DN40 | 76 030 |
| WATERSTRY SB 10-12 | WR30133810-12 | 4,0 | DN40 | 80 720 |
| WATERSTRY SB 10-14 | WR30133810-14 | 5,5 | DN40 | 104 640 |
| WATERSTRY SB 10-16 | WR30133810-16 | 5,5 | DN40 | 110 150 |
| WATERSTRY SB 10-18 | WR30133810-18 | 7,5 | DN40 | 118 290 |
| WATERSTRY SB 10-20 | WR30133810-20 | 7,5 | DN40 | 123 350 |
| WATERSTRY SB 10-22 | WR30133810-22 | 7,5 | DN40 | 128 380 |
| WATERSTRY SB 15-1 | WR30133815-1 | 1,1 | DN50 | 43 600 |
| WATERSTRY SB 15-2 | WR30133815-2 | 2,2 | DN50 | 50 100 |
| WATERSTRY SB 15-3 | WR30133815-3 | 3,0 | DN50 | 60 080 |
| WATERSTRY SB 15-4 | WR30133815-4 | 4,0 | DN50 | 68 160 |
| WATERSTRY SB 15-5 | WR30133815-5 | 4,0 | DN50 | 72 170 |
| WATERSTRY SB 15-6 | WR30133815-6 | 5,5 | DN50 | 94 640 |
| WATERSTRY SB 15-7 | WR30133815-7 | 5,5 | DN50 | 99 470 |
| WATERSTRY SB 15-8 | WR30133815-8 | 7,5 | DN50 | 106 220 |
| WATERSTRY SB 15-9 | WR30133815-9 | 7,5 | DN50 | 110 300 |
| WATERSTRY SB 15-10 | WR30133815-10 | 11,0 | DN50 | 144 040 |
| WATERSTRY SB 15-12 | WR30133815-12 | 11,0 | DN50 | 151 830 |
| WATERSTRY SB 15-14 | WR30133815-14 | 11,0 | DN50 | 158 920 |
| WATERSTRY SB 20-1 | WR30133820-1 | 1,1 | DN50 | 43 610 |
| WATERSTRY SB 20-2 | WR30133820-2 | 2,2 | DN50 | 50 120 |
| WATERSTRY SB 20-3 | WR30133820-3 | 4,0 | DN50 | 64 220 |
| WATERSTRY SB 20-4 | WR300338020-4 | 5,5 | DN50 | 86 570 |
| WATERSTRY SB 20-4 | WR30133820-4 | 5,5 | DN50 | 80 980 |
| WATERSTRY SB 20-5 | WR300338020-5 | 5,5 | DN50 | 90 660 |
| WATERSTRY SB 20-5 | WR30133820-5 | 5,5 | DN50 | 84 810 |
| WATERSTRY SB 20-6 | WR30133820-6 | 7,5 | DN50 | 97 390 |
| WATERSTRY SB 20-7 | WR30133820-7 | 7,5 | DN50 | 102 230 |
| WATERSTRY SB 20-8 | WR30133820-8 | 11,0 | DN50 | 134 500 |
| WATERSTRY SB 20-10 | WR30133820-10 | 11,0 | DN50 | 144 110 |
| WATERSTRY SB 20-12 | WR30133820-12 | 15,0 | DN50 | 158 190 |
| WATERSTRY SB 20-14 | WR30133820-14 | 15,0 | DN50 | 165 300 |
| WATERSTRY SB 20-17 | WR30133820-17 | 18,5 | DN50 | 204 590 |
| WATERSTRY SB 32-1 | WR301338032-1 | 2,2 | DN65 | 68 740 |
| WATERSTRY SB 32-1-1 | WR301338032-1-1 | 1,5 | DN65 | 66 790 |
| WATERSTRY SB 32-2 | WR301338032-2 | 4,0 | DN65 | 88 480 |
| WATERSTRY SB 32-2-2 | WR301338032-2-2 | 3,0 | DN65 | 83 440 |
| WATERSTRY SB 32-3 | WR300338032-3 | 5,5 | DN65 | 102 590 |
| WATERSTRY SB 32-3 | WR301338032-3 | 5,5 | DN65 | 116 110 |
| WATERSTRY SB 32-3-2 | WR301338032-3-2 | 5,5 | DN65 | 116 220 |
| WATERSTRY SB 32-4 | WR301338032-4 | 7,5 | DN65 | 129 150 |
| WATERSTRY SB 32-4-2 | WR301338032-4-2 | 7,5 | DN65 | 129 270 |
| WATERSTRY SB 32-4-2 | WR300338032-4-2 | 7,5 | DN65 | 114 210 |
| WATERSTRY SB 32-5 | WR301338032-5 | 11,0 | DN65 | 167 440 |
| WATERSTRY SB 32-5-2 | WR301338032-5-2 | 11,0 | DN65 | 167 540 |
| WATERSTRY SB 32-6 | WR301338032-6 | 11,0 | DN65 | 175 390 |
| WATERSTRY SB 32-6-2 | WR301338032-6-2 | 11,0 | DN65 | 175 490 |
| WATERSTRY SB 32-7 | WR301338032-7 | 15,0 | DN65 | 189 790 |
| WATERSTRY SB 32-7-2 | WR301338032-7-2 | 15,0 | DN65 | 189 890 |
| WATERSTRY SB 32-7-2 | WR300338032-7-2 | 15,0 | DN65 | 167 770 |
| WATERSTRY SB 32-8 | WR301338032-8 | 15,0 | DN65 | 201 180 |
| WATERSTRY SB 32-8-2 | WR301338032-8-2 | 15,0 | DN65 | 201 280 |
| WATERSTRY SB 32-9 | WR301338032-9 | 18,5 | DN65 | 237 740 |
| WATERSTRY SB 32-9-2 | WR301338032-9-2 | 18,5 | DN65 | 237 930 |
| WATERSTRY SB 32-10 | WR301338032-10 | 18,5 | DN65 | 245 790 |
| WATERSTRY SB 32-10-2 | WR301338032-10-2 | 18,5 | DN65 | 245 890 |
| WATERSTRY SB 32-11 | WR301338032-11 | 22,0 | DN65 | 286 350 |
| WATERSTRY SB 32-11-2 | WR301338032-11-2 | 22,0 | DN65 | 286 470 |
| WATERSTRY SB 32-12 | WR301338032-12 | 22,0 | DN65 | 295 660 |
| WATERSTRY SB 32-12-2 | WR301338032-12-2 | 22,0 | DN65 | 295 780 |
| WATERSTRY SB 32-13 | WR301338032-13 | 30,0 | DN65 | 333 990 |
| WATERSTRY SB 32-13-2 | WR301338032-13-2 | 30,0 | DN65 | 334 110 |
| WATERSTRY SB 32-14 | WR301338032-14 | 30,0 | DN65 | 343 340 |
| WATERSTRY SB 32-14-2 | WR301338032-14-2 | 30,0 | DN65 | 343 460 |
| WATERSTRY SB 45-1 | WR300338045-1 | 4,0 | DN80 | 91 480 |
| WATERSTRY SB 45-1-1 | WR300338045-1-1 | 3,0 | DN80 | 86 390 |
| WATERSTRY SB 45-2 | WR300338045-2 | 7,5 | DN80 | 122 230 |
| WATERSTRY SB 45-2-2 | WR300338045-2-2 | 5,5 | DN80 | 118 130 |
| WATERSTRY SB 45-3 | WR300338045-3 | 11,0 | DN80 | 168 120 |
| WATERSTRY SB 45-3-2 | WR300338045-3-2 | 11,0 | DN80 | 168 240 |
| WATERSTRY SB 45-4 | WR300338045-4 | 15,0 | DN80 | 184 640 |
| WATERSTRY SB 45-4-2 | WR300338045-4-2 | 15,0 | DN80 | 184 750 |
| WATERSTRY SB 45-5 | WR300338045-5 | 18,5 | DN80 | 223 630 |
| WATERSTRY SB 45-5-2 | WR300338045-5-2 | 18,5 | DN80 | 223 740 |
| WATERSTRY SB 45-6 | WR300338045-6 | 22,0 | DN80 | 263 520 |
| WATERSTRY SB 45-6-2 | WR300338045-6-2 | 22,0 | DN80 | 263 650 |
| WATERSTRY SB 45-7 | WR300338045-7 | 30,0 | DN80 | 305 460 |
| WATERSTRY SB 45-7-2 | WR300338045-7-2 | 30,0 | DN80 | 305 600 |
| WATERSTRY SB 45-8 | WR300338045-8 | 30,0 | DN80 | 321 970 |
| WATERSTRY SB 45-8-2 | WR300338045-8-2 | 30,0 | DN80 | 322 110 |
| WATERSTRY SB 45-9 | WR300338045-9 | 37,0 | DN80 | 354 840 |
| WATERSTRY SB 45-9-2 | WR300338045-9-2 | 30,0 | DN80 | 334 080 |
| WATERSTRY SB 45-10 | WR300338045-10 | 37,0 | DN80 | 367 670 |
| WATERSTRY SB 45-10-2 | WR300338045-10-2 | 37,0 | DN80 | 367 810 |
| WATERSTRY SB 45-11 | WR300338045-11 | 45,0 | DN80 | 405 990 |
| WATERSTRY SB 45-11-2 | WR300338045-11-2 | 45,0 | DN80 | 406 130 |
| WATERSTRY SB 45-12 | WR300338045-12 | 45,0 | DN80 | 418 590 |
| WATERSTRY SB 45-12-2 | WR300338045-12-2 | 45,0 | DN80 | 418 730 |
| WATERSTRY SB 45-13-2 | WR300338045-13-2 | 45,0 | DN80 | 431 330 |
| WATERSTRY SB 64-1 | WR300338064-1 | 5,5 | DN100 | 113 280 |
| WATERSTRY SB 64-1-1 | WR300338064-1-1 | 4,0 | DN100 | 96 990 |
| WATERSTRY SB 64-2 | WR300338064-2 | 11,0 | DN100 | 161 420 |
| WATERSTRY SB 64-2-1 | WR300338064-2-1 | 11,0 | DN100 | 161 480 |
| WATERSTRY SB 64-2-2 | WR300338064-2-2 | 7,5 | DN100 | 130 250 |
| WATERSTRY SB 64-3 | WR300338064-3 | 18,5 | DN100 | 212 910 |
| WATERSTRY SB 64-3-1 | WR300338064-3-1 | 15,0 | DN100 | 184 030 |
| WATERSTRY SB 64-3-2 | WR300338064-3-2 | 15,0 | DN100 | 184 090 |
| WATERSTRY SB 64-4 | WR300338064-4 | 22,0 | DN100 | 254 590 |
| WATERSTRY SB 64-4-1 | WR300338064-4-1 | 22,0 | DN100 | 254 660 |
| WATERSTRY SB 64-4-2 | WR300338064-4-2 | 18,5 | DN100 | 224 380 |
| WATERSTRY SB 64-5 | WR300338064-5 | 30,0 | DN100 | 298 360 |
| WATERSTRY SB 64-5-1 | WR300338064-5-1 | 30,0 | DN100 | 298 430 |
| WATERSTRY SB 64-5-2 | WR300338064-5-2 | 30,0 | DN100 | 298 510 |
| WATERSTRY SB 64-6 | WR300338064-6 | 37,0 | DN100 | 332 060 |
| WATERSTRY SB 64-6-1 | WR300338064-6-1 | 37,0 | DN100 | 332 140 |
| WATERSTRY SB 64-6-2 | WR300338064-6-2 | 30,0 | DN100 | 312 270 |
| WATERSTRY SB 64-7 | WR300338064-7 | 45,0 | DN100 | 372 190 |
| WATERSTRY SB 64-7-1 | WR300338064-7-1 | 37,0 | DN100 | 346 450 |
| WATERSTRY SB 64-7-2 | WR300338064-7-2 | 37,0 | DN100 | 347 460 |
| WATERSTRY SB 64-8-1 | WR300338064-8-1 | 45,0 | DN100 | 392 290 |
| WATERSTRY SB 64-8-2 | WR300338064-8-2 | 45,0 | DN100 | 392 360 |
| WATERSTRY SB 90-1 | WR300338090-1 | 7,5 | DN100 | 127 940 |
| WATERSTRY SB 90-1-1 | WR300338090-1-1 | 5,5 | DN100 | 119 690 |
| WATERSTRY SB 90-2 | WR300338090-2 | 15,0 | DN100 | 183 230 |
| WATERSTRY SB 90-2-2 | WR300338090-2-2 | 11,0 | DN100 | 170 330 |
| WATERSTRY SB 90-3 | WR300338090-3 | 22,0 | DN100 | 262 380 |
| WATERSTRY SB 90-3-2 | WR300338090-3-2 | 18,5 | DN100 | 225 360 |
| WATERSTRY SB 90-4 | WR300338090-4 | 30,0 | DN100 | 311 650 |
| WATERSTRY SB 90-4-2 | WR300338090-4-2 | 30,0 | DN100 | 303 930 |
| WATERSTRY SB 90-5 | WR300338090-5 | 37,0 | DN100 | 352 820 |
| WATERSTRY SB 90-5-2 | WR300338090-5-2 | 37,0 | DN100 | 344 720 |
| WATERSTRY SB 90-6 | WR300338090-6 | 45,0 | DN100 | 398 280 |
| WATERSTRY SB 90-6-2 | WR300338090-6-2 | 45,0 | DN100 | 390 180 |
| WATERSTRY SB 120-1 | WR3003380120-1 | 11,0 | DN125 | 309 440 |
| WATERSTRY SB 120-2 | WR3003380120-2 | 22,0 | DN125 | 443 520 |
| WATERSTRY SB 120-2-1 | WR3003380120-2-1 | 18,5 | DN125 | 406 410 |
| WATERSTRY SB 120-3 | WR3003380120-3 | 30,0 | DN125 | 552 130 |
| WATERSTRY SB 120-4-1 | WR3003380120-4-1 | 37,0 | DN125 | 612 400 |
| WATERSTRY SB 120-5-1 | WR3003380120-5-1 | 45,0 | DN125 | 707 220 |
| WATERSTRY SB 120-6-1 | WR3003380120-6-1 | 55,0 | DN125 | 853 280 |
| WATERSTRY SB 120-7 | WR3003380120-7 | 75,0 | DN125 | 1 024 620 |
| WATERSTRY SB 150-1 | WR3003380150-1 | 15,0 | DN150 | 327 840 |
| WATERSTRY SB 150-1-1 | WR3003380150-1-1 | 11,0 | DN150 | 310 850 |
| WATERSTRY SB 150-2-1 | WR3003380150-2-1 | 22,0 | DN150 | 439 820 |
| WATERSTRY SB 150-3 | WR3003380150-3 | 37,0 | DN150 | 572 480 |
| WATERSTRY SB 150-3-2 | WR3003380150-3-2 | 30,0 | DN150 | 557 330 |
| WATERSTRY SB 150-4-1 | WR3003380150-4-1 | 45,0 | DN150 | 669 820 |
| WATERSTRY SB 150-5-2 | WR3003380150-5-2 | 55,0 | DN150 | 817 430 |
| WATERSTRY SB 150-6 | WR3003380150-6 | 75,0 | DN150 | 993 770 |
WATERSTRY SB IE3 Вертикальные насосы
Условия эксплуатации:
Двигатель IE3
Насосы укомплектованы новыми энергоэффектиными электродвигателями (асинхронные двигатели класса IE3).
Данные электрооборудования:
Частота: 50 Гц
Класс защиты: IP55
Класс изоляции: F