"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 | 25 060 |
| WATERSTRY SB 1-3 | WR20133801-3ST | 0,37 | DN25 | 25 260 |
| WATERSTRY SB 1-4 | WR20133801-4ST | 0,37 | DN25 | 26 290 |
| WATERSTRY SB 1-5 | WR20133801-5ST | 0,37 | DN25 | 27 350 |
| WATERSTRY SB 1-6 | WR20133801-6ST | 0,37 | DN25 | 28 380 |
| WATERSTRY SB 1-7 | WR20133801-7ST | 0,37 | DN25 | 29 460 |
| WATERSTRY SB 1-8 | WR20133801-8ST | 0,55 | DN25 | 30 910 |
| WATERSTRY SB 1-9 | WR20133801-9ST | 0,55 | DN25 | 31 950 |
| WATERSTRY SB 1-10 | WR20133801-10ST | 0,55 | DN25 | 33 560 |
| WATERSTRY SB 1-11 | WR20133801-11 | 0,55 | DN25 | 26 180 |
| WATERSTRY SB 1-11 | WR20133801-11ST | 0,55 | DN25 | 34 590 |
| WATERSTRY SB 1-12 | WR30133801-12 | 0,55 | DN25 | 37 070 |
| WATERSTRY SB 1-13 | WR30133801-13 | 0,75 | DN25 | 38 120 |
| WATERSTRY SB 1-15 | WR30133801-15 | 0,75 | DN25 | 40 110 |
| WATERSTRY SB 1-17 | WR30133801-17 | 1,1 | DN25 | 47 260 |
| WATERSTRY SB 1-19 | WR30133801-19 | 1,1 | DN25 | 49 270 |
| WATERSTRY SB 1-21 | WR30133801-21 | 1,1 | DN25 | 51 830 |
| WATERSTRY SB 1-23 | WR30133801-23 | 1,1 | DN25 | 53 900 |
| WATERSTRY SB 1-25 | WR30133801-25 | 1,5 | DN25 | 59 670 |
| WATERSTRY SB 1-27 | WR30133801-27 | 1,5 | DN25 | 61 660 |
| WATERSTRY SB 1-30 | WR30133801-30 | 1,5 | DN25 | 65 340 |
| WATERSTRY SB 1-33 | WR30133801-33 | 2,2 | DN25 | 70 290 |
| WATERSTRY SB 1-36 | WR30133801-36 | 2,2 | DN25 | 73 260 |
| WATERSTRY SB 3-2 | WR20133803-2ST | 0,37 | DN25 | 25 060 |
| WATERSTRY SB 3-3 | WR20133803-3ST | 0,37 | DN25 | 25 240 |
| WATERSTRY SB 3-4 | WR20133803-4ST | 0,37 | DN25 | 26 270 |
| WATERSTRY SB 3-5 | WR20133803-5ST | 0,37 | DN25 | 27 320 |
| WATERSTRY SB 3-6 | WR20133803-6ST | 0,55 | DN25 | 28 750 |
| WATERSTRY SB 3-7 | WR20133803-7ST | 0,55 | DN25 | 29 830 |
| WATERSTRY SB 3-8 | WR30133803-8 | 0,75 | DN25 | 32 260 |
| WATERSTRY SB 3-9 | WR30133803-9 | 0,75 | DN25 | 33 300 |
| WATERSTRY SB 3-10 | WR30133803-10 | 0,75 | DN25 | 34 900 |
| WATERSTRY SB 3-11 | WR30133803-11 | 1,1 | DN25 | 41 060 |
| WATERSTRY SB 3-12 | WR30133803-12 | 1,1 | DN25 | 42 140 |
| WATERSTRY SB 3-13 | WR30133803-13 | 1,1 | DN25 | 43 190 |
| WATERSTRY SB 3-15 | WR30133803-15 | 1,1 | DN25 | 45 180 |
| WATERSTRY SB 3-17 | WR30133803-17 | 1,5 | DN25 | 50 850 |
| WATERSTRY SB 3-19 | WR30133803-19 | 1,5 | DN25 | 52 850 |
| WATERSTRY SB 3-21 | WR30133803-21 | 2,2 | DN25 | 57 380 |
| WATERSTRY SB 3-23 | WR30133803-23 | 2,2 | DN25 | 59 450 |
| WATERSTRY SB 3-25 | WR30133803-25 | 2,2 | DN25 | 61 530 |
| WATERSTRY SB 3-27 | WR30133803-27 | 2,2 | DN25 | 63 520 |
| WATERSTRY SB 3-29 | WR30133803-29 | 2,2 | DN25 | 66 090 |
| WATERSTRY SB 3-31 | WR30133803-31 | 3,0 | DN25 | 74 580 |
| WATERSTRY SB 3-33 | WR30133803-33 | 3,0 | DN25 | 76 580 |
| WATERSTRY SB 5-2 | WR20133805-2ST | 0,37 | DN25 | 24 790 |
| WATERSTRY SB 5-3 | WR20133805-3ST | 0,55 | DN25 | 26 380 |
| WATERSTRY SB 5-4 | WR20133805-4ST | 0,55 | DN25 | 27 560 |
| WATERSTRY SB 5-5 | WR20133805-5ST | 0,75 | DN25 | 28 180 |
| WATERSTRY SB 5-5 | WR30133805-5 | 0,75 | DN25 | 29 920 |
| WATERSTRY SB 5-6 | WR30133805-6 | 1,1 | DN25 | 36 230 |
| WATERSTRY SB 5-7 | WR30133805-7 | 1,1 | DN25 | 37 410 |
| WATERSTRY SB 5-8 | WR30133805-8 | 1,1 | DN25 | 39 210 |
| WATERSTRY SB 5-9 | WR30133805-9 | 1,5 | DN25 | 43 980 |
| WATERSTRY SB 5-10 | WR30133805-10 | 1,5 | DN25 | 45 300 |
| WATERSTRY SB 5-11 | WR30133805-11 | 2,2 | DN25 | 48 380 |
| WATERSTRY SB 5-12 | WR30133805-12 | 2,2 | DN25 | 49 750 |
| WATERSTRY SB 5-13 | WR30133805-13 | 2,2 | DN25 | 51 560 |
| WATERSTRY SB 5-14 | WR30133805-14 | 2,2 | DN25 | 52 740 |
| WATERSTRY SB 5-15 | WR30133805-15 | 2,2 | DN25 | 53 930 |
| WATERSTRY SB 5-16 | WR30133805-16 | 2,2 | DN25 | 55 160 |
| WATERSTRY SB 5-18 | WR30133805-18 | 3,0 | DN25 | 64 610 |
| WATERSTRY SB 5-20 | WR30133805-20 | 3,0 | DN25 | 67 050 |
| WATERSTRY SB 5-22 | WR30133805-22 | 4,0 | DN25 | 74 090 |
| WATERSTRY SB 5-24 | WR30133805-24 | 4,0 | DN25 | 77 460 |
| WATERSTRY SB 5-26 | WR30133805-26 | 4,0 | DN25 | 79 870 |
| WATERSTRY SB 5-29 | WR30133805-29 | 4,0 | DN25 | 84 060 |
| WATERSTRY SB 5-32 | WR30133805-32 | 5,5 | DN25 | 105 130 |
| WATERSTRY SB 5-36 | WR30133805-36 | 5,5 | DN25 | 111 270 |
| WATERSTRY SB 10-2 | WR30133810-2 | 0,75 | DN40 | 34 670 |
| WATERSTRY SB 10-3 | WR30133810-3 | 1,1 | DN40 | 42 340 |
| WATERSTRY SB 10-4 | WR30133810-4 | 1,5 | DN40 | 47 730 |
| WATERSTRY SB 10-5 | WR30133810-5 | 2,2 | DN40 | 51 870 |
| WATERSTRY SB 10-6 | WR30133810-6 | 2,2 | DN40 | 54 050 |
| WATERSTRY SB 10-7 | WR30133810-7 | 3,0 | DN40 | 63 160 |
| WATERSTRY SB 10-8 | WR30133810-8 | 3,0 | DN40 | 65 340 |
| WATERSTRY SB 10-9 | WR30133810-9 | 3,0 | DN40 | 68 260 |
| WATERSTRY SB 10-10 | WR30133810-10 | 4,0 | DN40 | 75 290 |
| WATERSTRY SB 10-12 | WR30133810-12 | 4,0 | DN40 | 79 940 |
| WATERSTRY SB 10-14 | WR30133810-14 | 5,5 | DN40 | 103 630 |
| WATERSTRY SB 10-16 | WR30133810-16 | 5,5 | DN40 | 109 080 |
| WATERSTRY SB 10-18 | WR30133810-18 | 7,5 | DN40 | 117 140 |
| WATERSTRY SB 10-20 | WR30133810-20 | 7,5 | DN40 | 122 160 |
| WATERSTRY SB 10-22 | WR30133810-22 | 7,5 | DN40 | 127 140 |
| WATERSTRY SB 15-1 | WR30133815-1 | 1,1 | DN50 | 43 180 |
| WATERSTRY SB 15-2 | WR30133815-2 | 2,2 | DN50 | 49 620 |
| WATERSTRY SB 15-3 | WR30133815-3 | 3,0 | DN50 | 59 500 |
| WATERSTRY SB 15-4 | WR30133815-4 | 4,0 | DN50 | 67 500 |
| WATERSTRY SB 15-5 | WR30133815-5 | 4,0 | DN50 | 71 470 |
| WATERSTRY SB 15-6 | WR30133815-6 | 5,5 | DN50 | 93 720 |
| WATERSTRY SB 15-7 | WR30133815-7 | 5,5 | DN50 | 98 500 |
| WATERSTRY SB 15-8 | WR30133815-8 | 7,5 | DN50 | 105 190 |
| WATERSTRY SB 15-9 | WR30133815-9 | 7,5 | DN50 | 109 230 |
| WATERSTRY SB 15-10 | WR30133815-10 | 11,0 | DN50 | 142 650 |
| WATERSTRY SB 15-12 | WR30133815-12 | 11,0 | DN50 | 150 360 |
| WATERSTRY SB 15-14 | WR30133815-14 | 11,0 | DN50 | 157 380 |
| WATERSTRY SB 20-1 | WR30133820-1 | 1,1 | DN50 | 43 190 |
| WATERSTRY SB 20-2 | WR30133820-2 | 2,2 | DN50 | 49 630 |
| WATERSTRY SB 20-3 | WR30133820-3 | 4,0 | DN50 | 63 600 |
| WATERSTRY SB 20-4 | WR300338020-4 | 5,5 | DN50 | 85 730 |
| WATERSTRY SB 20-4 | WR30133820-4 | 5,5 | DN50 | 80 200 |
| WATERSTRY SB 20-5 | WR300338020-5 | 5,5 | DN50 | 89 780 |
| WATERSTRY SB 20-5 | WR30133820-5 | 5,5 | DN50 | 83 990 |
| WATERSTRY SB 20-6 | WR30133820-6 | 7,5 | DN50 | 96 440 |
| WATERSTRY SB 20-7 | WR30133820-7 | 7,5 | DN50 | 101 240 |
| WATERSTRY SB 20-8 | WR30133820-8 | 11,0 | DN50 | 133 200 |
| WATERSTRY SB 20-10 | WR30133820-10 | 11,0 | DN50 | 142 710 |
| WATERSTRY SB 20-12 | WR30133820-12 | 15,0 | DN50 | 156 660 |
| WATERSTRY SB 20-14 | WR30133820-14 | 15,0 | DN50 | 163 690 |
| WATERSTRY SB 20-17 | WR30133820-17 | 18,5 | DN50 | 202 610 |
| WATERSTRY SB 32-1 | WR301338032-1 | 2,2 | DN65 | 68 070 |
| WATERSTRY SB 32-1-1 | WR301338032-1-1 | 1,5 | DN65 | 66 150 |
| WATERSTRY SB 32-2 | WR301338032-2 | 4,0 | DN65 | 87 630 |
| WATERSTRY SB 32-2-2 | WR301338032-2-2 | 3,0 | DN65 | 82 630 |
| WATERSTRY SB 32-3 | WR300338032-3 | 5,5 | DN65 | 101 600 |
| WATERSTRY SB 32-3 | WR301338032-3 | 5,5 | DN65 | 114 990 |
| WATERSTRY SB 32-3-2 | WR301338032-3-2 | 5,5 | DN65 | 115 090 |
| WATERSTRY SB 32-4 | WR301338032-4 | 7,5 | DN65 | 127 900 |
| WATERSTRY SB 32-4-2 | WR301338032-4-2 | 7,5 | DN65 | 128 020 |
| WATERSTRY SB 32-4-2 | WR300338032-4-2 | 7,5 | DN65 | 113 100 |
| WATERSTRY SB 32-5 | WR301338032-5 | 11,0 | DN65 | 165 820 |
| WATERSTRY SB 32-5-2 | WR301338032-5-2 | 11,0 | DN65 | 165 920 |
| WATERSTRY SB 32-6 | WR301338032-6 | 11,0 | DN65 | 173 690 |
| WATERSTRY SB 32-6-2 | WR301338032-6-2 | 11,0 | DN65 | 173 790 |
| WATERSTRY SB 32-7 | WR301338032-7 | 15,0 | DN65 | 187 950 |
| WATERSTRY SB 32-7-2 | WR301338032-7-2 | 15,0 | DN65 | 188 050 |
| WATERSTRY SB 32-7-2 | WR300338032-7-2 | 15,0 | DN65 | 166 150 |
| WATERSTRY SB 32-8 | WR301338032-8 | 15,0 | DN65 | 199 230 |
| WATERSTRY SB 32-8-2 | WR301338032-8-2 | 15,0 | DN65 | 199 330 |
| WATERSTRY SB 32-9 | WR301338032-9 | 18,5 | DN65 | 235 430 |
| WATERSTRY SB 32-9-2 | WR301338032-9-2 | 18,5 | DN65 | 235 620 |
| WATERSTRY SB 32-10 | WR301338032-10 | 18,5 | DN65 | 243 410 |
| WATERSTRY SB 32-10-2 | WR301338032-10-2 | 18,5 | DN65 | 243 510 |
| WATERSTRY SB 32-11 | WR301338032-11 | 22,0 | DN65 | 283 580 |
| WATERSTRY SB 32-11-2 | WR301338032-11-2 | 22,0 | DN65 | 283 690 |
| WATERSTRY SB 32-12 | WR301338032-12 | 22,0 | DN65 | 292 800 |
| WATERSTRY SB 32-12-2 | WR301338032-12-2 | 22,0 | DN65 | 292 920 |
| WATERSTRY SB 32-13 | WR301338032-13 | 30,0 | DN65 | 330 750 |
| WATERSTRY SB 32-13-2 | WR301338032-13-2 | 30,0 | DN65 | 330 870 |
| WATERSTRY SB 32-14 | WR301338032-14 | 30,0 | DN65 | 340 010 |
| WATERSTRY SB 32-14-2 | WR301338032-14-2 | 30,0 | DN65 | 340 130 |
| WATERSTRY SB 45-1 | WR300338045-1 | 4,0 | DN80 | 90 590 |
| WATERSTRY SB 45-1-1 | WR300338045-1-1 | 3,0 | DN80 | 85 550 |
| WATERSTRY SB 45-2 | WR300338045-2 | 7,5 | DN80 | 121 050 |
| WATERSTRY SB 45-2-2 | WR300338045-2-2 | 5,5 | DN80 | 116 980 |
| WATERSTRY SB 45-3 | WR300338045-3 | 11,0 | DN80 | 166 490 |
| WATERSTRY SB 45-3-2 | WR300338045-3-2 | 11,0 | DN80 | 166 610 |
| WATERSTRY SB 45-4 | WR300338045-4 | 15,0 | DN80 | 182 850 |
| WATERSTRY SB 45-4-2 | WR300338045-4-2 | 15,0 | DN80 | 182 960 |
| WATERSTRY SB 45-5 | WR300338045-5 | 18,5 | DN80 | 221 460 |
| WATERSTRY SB 45-5-2 | WR300338045-5-2 | 18,5 | DN80 | 221 580 |
| WATERSTRY SB 45-6 | WR300338045-6 | 22,0 | DN80 | 260 970 |
| WATERSTRY SB 45-6-2 | WR300338045-6-2 | 22,0 | DN80 | 261 100 |
| WATERSTRY SB 45-7 | WR300338045-7 | 30,0 | DN80 | 302 500 |
| WATERSTRY SB 45-7-2 | WR300338045-7-2 | 30,0 | DN80 | 302 640 |
| WATERSTRY SB 45-8 | WR300338045-8 | 30,0 | DN80 | 318 850 |
| WATERSTRY SB 45-8-2 | WR300338045-8-2 | 30,0 | DN80 | 318 990 |
| WATERSTRY SB 45-9 | WR300338045-9 | 37,0 | DN80 | 351 410 |
| WATERSTRY SB 45-9-2 | WR300338045-9-2 | 30,0 | DN80 | 330 840 |
| WATERSTRY SB 45-10 | WR300338045-10 | 37,0 | DN80 | 364 110 |
| WATERSTRY SB 45-10-2 | WR300338045-10-2 | 37,0 | DN80 | 364 240 |
| WATERSTRY SB 45-11 | WR300338045-11 | 45,0 | DN80 | 402 050 |
| WATERSTRY SB 45-11-2 | WR300338045-11-2 | 45,0 | DN80 | 402 190 |
| WATERSTRY SB 45-12 | WR300338045-12 | 45,0 | DN80 | 414 530 |
| WATERSTRY SB 45-12-2 | WR300338045-12-2 | 45,0 | DN80 | 414 670 |
| WATERSTRY SB 45-13-2 | WR300338045-13-2 | 45,0 | DN80 | 427 150 |
| WATERSTRY SB 64-1 | WR300338064-1 | 5,5 | DN100 | 112 190 |
| WATERSTRY SB 64-1-1 | WR300338064-1-1 | 4,0 | DN100 | 96 050 |
| WATERSTRY SB 64-2 | WR300338064-2 | 11,0 | DN100 | 159 850 |
| WATERSTRY SB 64-2-1 | WR300338064-2-1 | 11,0 | DN100 | 159 910 |
| WATERSTRY SB 64-2-2 | WR300338064-2-2 | 7,5 | DN100 | 128 990 |
| WATERSTRY SB 64-3 | WR300338064-3 | 18,5 | DN100 | 210 850 |
| WATERSTRY SB 64-3-1 | WR300338064-3-1 | 15,0 | DN100 | 182 250 |
| WATERSTRY SB 64-3-2 | WR300338064-3-2 | 15,0 | DN100 | 182 310 |
| WATERSTRY SB 64-4 | WR300338064-4 | 22,0 | DN100 | 252 120 |
| WATERSTRY SB 64-4-1 | WR300338064-4-1 | 22,0 | DN100 | 252 190 |
| WATERSTRY SB 64-4-2 | WR300338064-4-2 | 18,5 | DN100 | 222 210 |
| WATERSTRY SB 64-5 | WR300338064-5 | 30,0 | DN100 | 295 470 |
| WATERSTRY SB 64-5-1 | WR300338064-5-1 | 30,0 | DN100 | 295 540 |
| WATERSTRY SB 64-5-2 | WR300338064-5-2 | 30,0 | DN100 | 295 610 |
| WATERSTRY SB 64-6 | WR300338064-6 | 37,0 | DN100 | 328 840 |
| WATERSTRY SB 64-6-1 | WR300338064-6-1 | 37,0 | DN100 | 328 920 |
| WATERSTRY SB 64-6-2 | WR300338064-6-2 | 30,0 | DN100 | 309 250 |
| WATERSTRY SB 64-7 | WR300338064-7 | 45,0 | DN100 | 368 590 |
| WATERSTRY SB 64-7-1 | WR300338064-7-1 | 37,0 | DN100 | 343 090 |
| WATERSTRY SB 64-7-2 | WR300338064-7-2 | 37,0 | DN100 | 344 090 |
| WATERSTRY SB 64-8-1 | WR300338064-8-1 | 45,0 | DN100 | 388 490 |
| WATERSTRY SB 64-8-2 | WR300338064-8-2 | 45,0 | DN100 | 388 560 |
| WATERSTRY SB 90-1 | WR300338090-1 | 7,5 | DN100 | 126 700 |
| WATERSTRY SB 90-1-1 | WR300338090-1-1 | 5,5 | DN100 | 118 530 |
| WATERSTRY SB 90-2 | WR300338090-2 | 15,0 | DN100 | 181 450 |
| WATERSTRY SB 90-2-2 | WR300338090-2-2 | 11,0 | DN100 | 168 680 |
| WATERSTRY SB 90-3 | WR300338090-3 | 22,0 | DN100 | 259 840 |
| WATERSTRY SB 90-3-2 | WR300338090-3-2 | 18,5 | DN100 | 223 180 |
| WATERSTRY SB 90-4 | WR300338090-4 | 30,0 | DN100 | 308 630 |
| WATERSTRY SB 90-4-2 | WR300338090-4-2 | 30,0 | DN100 | 300 990 |
| WATERSTRY SB 90-5 | WR300338090-5 | 37,0 | DN100 | 349 400 |
| WATERSTRY SB 90-5-2 | WR300338090-5-2 | 37,0 | DN100 | 341 380 |
| WATERSTRY SB 90-6 | WR300338090-6 | 45,0 | DN100 | 394 420 |
| WATERSTRY SB 90-6-2 | WR300338090-6-2 | 45,0 | DN100 | 386 400 |
| WATERSTRY SB 120-1 | WR3003380120-1 | 11,0 | DN125 | 306 450 |
| WATERSTRY SB 120-2 | WR3003380120-2 | 22,0 | DN125 | 439 220 |
| WATERSTRY SB 120-2-1 | WR3003380120-2-1 | 18,5 | DN125 | 402 470 |
| WATERSTRY SB 120-3 | WR3003380120-3 | 30,0 | DN125 | 546 780 |
| WATERSTRY SB 120-4-1 | WR3003380120-4-1 | 37,0 | DN125 | 606 470 |
| WATERSTRY SB 120-5-1 | WR3003380120-5-1 | 45,0 | DN125 | 700 370 |
| WATERSTRY SB 120-6-1 | WR3003380120-6-1 | 55,0 | DN125 | 845 020 |
| WATERSTRY SB 120-7 | WR3003380120-7 | 75,0 | DN125 | 1 014 690 |
| WATERSTRY SB 150-1 | WR3003380150-1 | 15,0 | DN150 | 324 660 |
| WATERSTRY SB 150-1-1 | WR3003380150-1-1 | 11,0 | DN150 | 307 840 |
| WATERSTRY SB 150-2-1 | WR3003380150-2-1 | 22,0 | DN150 | 435 560 |
| WATERSTRY SB 150-3 | WR3003380150-3 | 37,0 | DN150 | 566 930 |
| WATERSTRY SB 150-3-2 | WR3003380150-3-2 | 30,0 | DN150 | 551 930 |
| WATERSTRY SB 150-4-1 | WR3003380150-4-1 | 45,0 | DN150 | 663 330 |
| WATERSTRY SB 150-5-2 | WR3003380150-5-2 | 55,0 | DN150 | 809 510 |
| WATERSTRY SB 150-6 | WR3003380150-6 | 75,0 | DN150 | 984 140 |
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