"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 | 24 760 |
| WATERSTRY SB 1-3 | WR20133801-3ST | 0,37 | DN25 | 24 950 |
| WATERSTRY SB 1-4 | WR20133801-4ST | 0,37 | DN25 | 25 970 |
| WATERSTRY SB 1-5 | WR20133801-5ST | 0,37 | DN25 | 27 010 |
| WATERSTRY SB 1-6 | WR20133801-6ST | 0,37 | DN25 | 28 040 |
| WATERSTRY SB 1-7 | WR20133801-7ST | 0,37 | DN25 | 29 100 |
| WATERSTRY SB 1-8 | WR20133801-8ST | 0,55 | DN25 | 30 530 |
| WATERSTRY SB 1-9 | WR20133801-9ST | 0,55 | DN25 | 31 560 |
| WATERSTRY SB 1-10 | WR20133801-10ST | 0,55 | DN25 | 33 140 |
| WATERSTRY SB 1-11 | WR20133801-11 | 0,55 | DN25 | 25 860 |
| WATERSTRY SB 1-11 | WR20133801-11ST | 0,55 | DN25 | 34 170 |
| WATERSTRY SB 1-12 | WR30133801-12 | 0,55 | DN25 | 36 610 |
| WATERSTRY SB 1-13 | WR30133801-13 | 0,75 | DN25 | 37 650 |
| WATERSTRY SB 1-15 | WR30133801-15 | 0,75 | DN25 | 39 620 |
| WATERSTRY SB 1-17 | WR30133801-17 | 1,1 | DN25 | 46 680 |
| WATERSTRY SB 1-19 | WR30133801-19 | 1,1 | DN25 | 48 660 |
| WATERSTRY SB 1-21 | WR30133801-21 | 1,1 | DN25 | 51 190 |
| WATERSTRY SB 1-23 | WR30133801-23 | 1,1 | DN25 | 53 240 |
| WATERSTRY SB 1-25 | WR30133801-25 | 1,5 | DN25 | 58 940 |
| WATERSTRY SB 1-27 | WR30133801-27 | 1,5 | DN25 | 60 910 |
| WATERSTRY SB 1-30 | WR30133801-30 | 1,5 | DN25 | 64 540 |
| WATERSTRY SB 1-33 | WR30133801-33 | 2,2 | DN25 | 69 430 |
| WATERSTRY SB 1-36 | WR30133801-36 | 2,2 | DN25 | 72 360 |
| WATERSTRY SB 3-2 | WR20133803-2ST | 0,37 | DN25 | 24 750 |
| WATERSTRY SB 3-3 | WR20133803-3ST | 0,37 | DN25 | 24 930 |
| WATERSTRY SB 3-4 | WR20133803-4ST | 0,37 | DN25 | 25 950 |
| WATERSTRY SB 3-5 | WR20133803-5ST | 0,37 | DN25 | 26 990 |
| WATERSTRY SB 3-6 | WR20133803-6ST | 0,55 | DN25 | 28 400 |
| WATERSTRY SB 3-7 | WR20133803-7ST | 0,55 | DN25 | 29 460 |
| WATERSTRY SB 3-8 | WR30133803-8 | 0,75 | DN25 | 31 870 |
| WATERSTRY SB 3-9 | WR30133803-9 | 0,75 | DN25 | 32 890 |
| WATERSTRY SB 3-10 | WR30133803-10 | 0,75 | DN25 | 34 470 |
| WATERSTRY SB 3-11 | WR30133803-11 | 1,1 | DN25 | 40 560 |
| WATERSTRY SB 3-12 | WR30133803-12 | 1,1 | DN25 | 41 630 |
| WATERSTRY SB 3-13 | WR30133803-13 | 1,1 | DN25 | 42 660 |
| WATERSTRY SB 3-15 | WR30133803-15 | 1,1 | DN25 | 44 620 |
| WATERSTRY SB 3-17 | WR30133803-17 | 1,5 | DN25 | 50 230 |
| WATERSTRY SB 3-19 | WR30133803-19 | 1,5 | DN25 | 52 210 |
| WATERSTRY SB 3-21 | WR30133803-21 | 2,2 | DN25 | 56 680 |
| WATERSTRY SB 3-23 | WR30133803-23 | 2,2 | DN25 | 58 720 |
| WATERSTRY SB 3-25 | WR30133803-25 | 2,2 | DN25 | 60 780 |
| WATERSTRY SB 3-27 | WR30133803-27 | 2,2 | DN25 | 62 740 |
| WATERSTRY SB 3-29 | WR30133803-29 | 2,2 | DN25 | 65 280 |
| WATERSTRY SB 3-31 | WR30133803-31 | 3,0 | DN25 | 73 670 |
| WATERSTRY SB 3-33 | WR30133803-33 | 3,0 | DN25 | 75 650 |
| WATERSTRY SB 5-2 | WR20133805-2ST | 0,37 | DN25 | 24 490 |
| WATERSTRY SB 5-3 | WR20133805-3ST | 0,55 | DN25 | 26 060 |
| WATERSTRY SB 5-4 | WR20133805-4ST | 0,55 | DN25 | 27 220 |
| WATERSTRY SB 5-5 | WR20133805-5ST | 0,75 | DN25 | 27 830 |
| WATERSTRY SB 5-5 | WR30133805-5 | 0,75 | DN25 | 29 560 |
| WATERSTRY SB 5-6 | WR30133805-6 | 1,1 | DN25 | 35 790 |
| WATERSTRY SB 5-7 | WR30133805-7 | 1,1 | DN25 | 36 950 |
| WATERSTRY SB 5-8 | WR30133805-8 | 1,1 | DN25 | 38 730 |
| WATERSTRY SB 5-9 | WR30133805-9 | 1,5 | DN25 | 43 440 |
| WATERSTRY SB 5-10 | WR30133805-10 | 1,5 | DN25 | 44 740 |
| WATERSTRY SB 5-11 | WR30133805-11 | 2,2 | DN25 | 47 790 |
| WATERSTRY SB 5-12 | WR30133805-12 | 2,2 | DN25 | 49 150 |
| WATERSTRY SB 5-13 | WR30133805-13 | 2,2 | DN25 | 50 930 |
| WATERSTRY SB 5-14 | WR30133805-14 | 2,2 | DN25 | 52 090 |
| WATERSTRY SB 5-15 | WR30133805-15 | 2,2 | DN25 | 53 270 |
| WATERSTRY SB 5-16 | WR30133805-16 | 2,2 | DN25 | 54 490 |
| WATERSTRY SB 5-18 | WR30133805-18 | 3,0 | DN25 | 63 820 |
| WATERSTRY SB 5-20 | WR30133805-20 | 3,0 | DN25 | 66 220 |
| WATERSTRY SB 5-22 | WR30133805-22 | 4,0 | DN25 | 73 190 |
| WATERSTRY SB 5-24 | WR30133805-24 | 4,0 | DN25 | 76 510 |
| WATERSTRY SB 5-26 | WR30133805-26 | 4,0 | DN25 | 78 900 |
| WATERSTRY SB 5-29 | WR30133805-29 | 4,0 | DN25 | 83 030 |
| WATERSTRY SB 5-32 | WR30133805-32 | 5,5 | DN25 | 103 850 |
| WATERSTRY SB 5-36 | WR30133805-36 | 5,5 | DN25 | 109 910 |
| WATERSTRY SB 10-2 | WR30133810-2 | 0,75 | DN40 | 34 250 |
| WATERSTRY SB 10-3 | WR30133810-3 | 1,1 | DN40 | 41 820 |
| WATERSTRY SB 10-4 | WR30133810-4 | 1,5 | DN40 | 47 140 |
| WATERSTRY SB 10-5 | WR30133810-5 | 2,2 | DN40 | 51 230 |
| WATERSTRY SB 10-6 | WR30133810-6 | 2,2 | DN40 | 53 390 |
| WATERSTRY SB 10-7 | WR30133810-7 | 3,0 | DN40 | 62 390 |
| WATERSTRY SB 10-8 | WR30133810-8 | 3,0 | DN40 | 64 540 |
| WATERSTRY SB 10-9 | WR30133810-9 | 3,0 | DN40 | 67 420 |
| WATERSTRY SB 10-10 | WR30133810-10 | 4,0 | DN40 | 74 370 |
| WATERSTRY SB 10-12 | WR30133810-12 | 4,0 | DN40 | 78 960 |
| WATERSTRY SB 10-14 | WR30133810-14 | 5,5 | DN40 | 102 360 |
| WATERSTRY SB 10-16 | WR30133810-16 | 5,5 | DN40 | 107 750 |
| WATERSTRY SB 10-18 | WR30133810-18 | 7,5 | DN40 | 115 710 |
| WATERSTRY SB 10-20 | WR30133810-20 | 7,5 | DN40 | 120 660 |
| WATERSTRY SB 10-22 | WR30133810-22 | 7,5 | DN40 | 125 580 |
| WATERSTRY SB 15-1 | WR30133815-1 | 1,1 | DN50 | 42 650 |
| WATERSTRY SB 15-2 | WR30133815-2 | 2,2 | DN50 | 49 010 |
| WATERSTRY SB 15-3 | WR30133815-3 | 3,0 | DN50 | 58 770 |
| WATERSTRY SB 15-4 | WR30133815-4 | 4,0 | DN50 | 66 670 |
| WATERSTRY SB 15-5 | WR30133815-5 | 4,0 | DN50 | 70 590 |
| WATERSTRY SB 15-6 | WR30133815-6 | 5,5 | DN50 | 92 570 |
| WATERSTRY SB 15-7 | WR30133815-7 | 5,5 | DN50 | 97 300 |
| WATERSTRY SB 15-8 | WR30133815-8 | 7,5 | DN50 | 103 900 |
| WATERSTRY SB 15-9 | WR30133815-9 | 7,5 | DN50 | 107 890 |
| WATERSTRY SB 15-10 | WR30133815-10 | 11,0 | DN50 | 140 900 |
| WATERSTRY SB 15-12 | WR30133815-12 | 11,0 | DN50 | 148 520 |
| WATERSTRY SB 15-14 | WR30133815-14 | 11,0 | DN50 | 155 450 |
| WATERSTRY SB 20-1 | WR30133820-1 | 1,1 | DN50 | 42 660 |
| WATERSTRY SB 20-2 | WR30133820-2 | 2,2 | DN50 | 49 030 |
| WATERSTRY SB 20-3 | WR30133820-3 | 4,0 | DN50 | 62 820 |
| WATERSTRY SB 20-4 | WR300338020-4 | 5,5 | DN50 | 84 680 |
| WATERSTRY SB 20-4 | WR30133820-4 | 5,5 | DN50 | 79 220 |
| WATERSTRY SB 20-5 | WR300338020-5 | 5,5 | DN50 | 88 680 |
| WATERSTRY SB 20-5 | WR30133820-5 | 5,5 | DN50 | 82 960 |
| WATERSTRY SB 20-6 | WR30133820-6 | 7,5 | DN50 | 95 260 |
| WATERSTRY SB 20-7 | WR30133820-7 | 7,5 | DN50 | 100 000 |
| WATERSTRY SB 20-8 | WR30133820-8 | 11,0 | DN50 | 131 570 |
| WATERSTRY SB 20-10 | WR30133820-10 | 11,0 | DN50 | 140 970 |
| WATERSTRY SB 20-12 | WR30133820-12 | 15,0 | DN50 | 154 740 |
| WATERSTRY SB 20-14 | WR30133820-14 | 15,0 | DN50 | 161 690 |
| WATERSTRY SB 20-17 | WR30133820-17 | 18,5 | DN50 | 200 130 |
| WATERSTRY SB 32-1 | WR301338032-1 | 2,2 | DN65 | 67 240 |
| WATERSTRY SB 32-1-1 | WR301338032-1-1 | 1,5 | DN65 | 65 340 |
| WATERSTRY SB 32-2 | WR301338032-2 | 4,0 | DN65 | 86 550 |
| WATERSTRY SB 32-2-2 | WR301338032-2-2 | 3,0 | DN65 | 81 620 |
| WATERSTRY SB 32-3 | WR300338032-3 | 5,5 | DN65 | 100 350 |
| WATERSTRY SB 32-3 | WR301338032-3 | 5,5 | DN65 | 113 580 |
| WATERSTRY SB 32-3-2 | WR301338032-3-2 | 5,5 | DN65 | 113 680 |
| WATERSTRY SB 32-4 | WR301338032-4 | 7,5 | DN65 | 126 330 |
| WATERSTRY SB 32-4-2 | WR301338032-4-2 | 7,5 | DN65 | 126 450 |
| WATERSTRY SB 32-4-2 | WR300338032-4-2 | 7,5 | DN65 | 111 720 |
| WATERSTRY SB 32-5 | WR301338032-5 | 11,0 | DN65 | 163 790 |
| WATERSTRY SB 32-5-2 | WR301338032-5-2 | 11,0 | DN65 | 163 890 |
| WATERSTRY SB 32-6 | WR301338032-6 | 11,0 | DN65 | 171 560 |
| WATERSTRY SB 32-6-2 | WR301338032-6-2 | 11,0 | DN65 | 171 660 |
| WATERSTRY SB 32-7 | WR301338032-7 | 15,0 | DN65 | 185 650 |
| WATERSTRY SB 32-7-2 | WR301338032-7-2 | 15,0 | DN65 | 185 750 |
| WATERSTRY SB 32-7-2 | WR300338032-7-2 | 15,0 | DN65 | 164 110 |
| WATERSTRY SB 32-8 | WR301338032-8 | 15,0 | DN65 | 196 790 |
| WATERSTRY SB 32-8-2 | WR301338032-8-2 | 15,0 | DN65 | 196 890 |
| WATERSTRY SB 32-9 | WR301338032-9 | 18,5 | DN65 | 232 550 |
| WATERSTRY SB 32-9-2 | WR301338032-9-2 | 18,5 | DN65 | 232 740 |
| WATERSTRY SB 32-10 | WR301338032-10 | 18,5 | DN65 | 240 430 |
| WATERSTRY SB 32-10-2 | WR301338032-10-2 | 18,5 | DN65 | 240 530 |
| WATERSTRY SB 32-11 | WR301338032-11 | 22,0 | DN65 | 280 100 |
| WATERSTRY SB 32-11-2 | WR301338032-11-2 | 22,0 | DN65 | 280 220 |
| WATERSTRY SB 32-12 | WR301338032-12 | 22,0 | DN65 | 289 210 |
| WATERSTRY SB 32-12-2 | WR301338032-12-2 | 22,0 | DN65 | 289 330 |
| WATERSTRY SB 32-13 | WR301338032-13 | 30,0 | DN65 | 326 700 |
| WATERSTRY SB 32-13-2 | WR301338032-13-2 | 30,0 | DN65 | 326 820 |
| WATERSTRY SB 32-14 | WR301338032-14 | 30,0 | DN65 | 335 850 |
| WATERSTRY SB 32-14-2 | WR301338032-14-2 | 30,0 | DN65 | 335 970 |
| WATERSTRY SB 45-1 | WR300338045-1 | 4,0 | DN80 | 89 490 |
| WATERSTRY SB 45-1-1 | WR300338045-1-1 | 3,0 | DN80 | 84 510 |
| WATERSTRY SB 45-2 | WR300338045-2 | 7,5 | DN80 | 119 570 |
| WATERSTRY SB 45-2-2 | WR300338045-2-2 | 5,5 | DN80 | 115 550 |
| WATERSTRY SB 45-3 | WR300338045-3 | 11,0 | DN80 | 164 450 |
| WATERSTRY SB 45-3-2 | WR300338045-3-2 | 11,0 | DN80 | 164 570 |
| WATERSTRY SB 45-4 | WR300338045-4 | 15,0 | DN80 | 180 610 |
| WATERSTRY SB 45-4-2 | WR300338045-4-2 | 15,0 | DN80 | 180 720 |
| WATERSTRY SB 45-5 | WR300338045-5 | 18,5 | DN80 | 218 750 |
| WATERSTRY SB 45-5-2 | WR300338045-5-2 | 18,5 | DN80 | 218 860 |
| WATERSTRY SB 45-6 | WR300338045-6 | 22,0 | DN80 | 257 770 |
| WATERSTRY SB 45-6-2 | WR300338045-6-2 | 22,0 | DN80 | 257 900 |
| WATERSTRY SB 45-7 | WR300338045-7 | 30,0 | DN80 | 298 800 |
| WATERSTRY SB 45-7-2 | WR300338045-7-2 | 30,0 | DN80 | 298 930 |
| WATERSTRY SB 45-8 | WR300338045-8 | 30,0 | DN80 | 314 950 |
| WATERSTRY SB 45-8-2 | WR300338045-8-2 | 30,0 | DN80 | 315 080 |
| WATERSTRY SB 45-9 | WR300338045-9 | 37,0 | DN80 | 347 100 |
| WATERSTRY SB 45-9-2 | WR300338045-9-2 | 30,0 | DN80 | 326 790 |
| WATERSTRY SB 45-10 | WR300338045-10 | 37,0 | DN80 | 359 650 |
| WATERSTRY SB 45-10-2 | WR300338045-10-2 | 37,0 | DN80 | 359 790 |
| WATERSTRY SB 45-11 | WR300338045-11 | 45,0 | DN80 | 397 130 |
| WATERSTRY SB 45-11-2 | WR300338045-11-2 | 45,0 | DN80 | 397 270 |
| WATERSTRY SB 45-12 | WR300338045-12 | 45,0 | DN80 | 409 460 |
| WATERSTRY SB 45-12-2 | WR300338045-12-2 | 45,0 | DN80 | 409 590 |
| WATERSTRY SB 45-13-2 | WR300338045-13-2 | 45,0 | DN80 | 421 920 |
| WATERSTRY SB 64-1 | WR300338064-1 | 5,5 | DN100 | 110 810 |
| WATERSTRY SB 64-1-1 | WR300338064-1-1 | 4,0 | DN100 | 94 880 |
| WATERSTRY SB 64-2 | WR300338064-2 | 11,0 | DN100 | 157 900 |
| WATERSTRY SB 64-2-1 | WR300338064-2-1 | 11,0 | DN100 | 157 960 |
| WATERSTRY SB 64-2-2 | WR300338064-2-2 | 7,5 | DN100 | 127 410 |
| WATERSTRY SB 64-3 | WR300338064-3 | 18,5 | DN100 | 208 260 |
| WATERSTRY SB 64-3-1 | WR300338064-3-1 | 15,0 | DN100 | 180 020 |
| WATERSTRY SB 64-3-2 | WR300338064-3-2 | 15,0 | DN100 | 180 080 |
| WATERSTRY SB 64-4 | WR300338064-4 | 22,0 | DN100 | 249 040 |
| WATERSTRY SB 64-4-1 | WR300338064-4-1 | 22,0 | DN100 | 249 110 |
| WATERSTRY SB 64-4-2 | WR300338064-4-2 | 18,5 | DN100 | 219 490 |
| WATERSTRY SB 64-5 | WR300338064-5 | 30,0 | DN100 | 291 860 |
| WATERSTRY SB 64-5-1 | WR300338064-5-1 | 30,0 | DN100 | 291 930 |
| WATERSTRY SB 64-5-2 | WR300338064-5-2 | 30,0 | DN100 | 292 000 |
| WATERSTRY SB 64-6 | WR300338064-6 | 37,0 | DN100 | 324 820 |
| WATERSTRY SB 64-6-1 | WR300338064-6-1 | 37,0 | DN100 | 324 890 |
| WATERSTRY SB 64-6-2 | WR300338064-6-2 | 30,0 | DN100 | 305 460 |
| WATERSTRY SB 64-7 | WR300338064-7 | 45,0 | DN100 | 364 070 |
| WATERSTRY SB 64-7-1 | WR300338064-7-1 | 37,0 | DN100 | 338 890 |
| WATERSTRY SB 64-7-2 | WR300338064-7-2 | 37,0 | DN100 | 339 880 |
| WATERSTRY SB 64-8-1 | WR300338064-8-1 | 45,0 | DN100 | 383 730 |
| WATERSTRY SB 64-8-2 | WR300338064-8-2 | 45,0 | DN100 | 383 810 |
| WATERSTRY SB 90-1 | WR300338090-1 | 7,5 | DN100 | 125 150 |
| WATERSTRY SB 90-1-1 | WR300338090-1-1 | 5,5 | DN100 | 117 080 |
| WATERSTRY SB 90-2 | WR300338090-2 | 15,0 | DN100 | 179 230 |
| WATERSTRY SB 90-2-2 | WR300338090-2-2 | 11,0 | DN100 | 166 620 |
| WATERSTRY SB 90-3 | WR300338090-3 | 22,0 | DN100 | 256 660 |
| WATERSTRY SB 90-3-2 | WR300338090-3-2 | 18,5 | DN100 | 220 450 |
| WATERSTRY SB 90-4 | WR300338090-4 | 30,0 | DN100 | 304 850 |
| WATERSTRY SB 90-4-2 | WR300338090-4-2 | 30,0 | DN100 | 297 300 |
| WATERSTRY SB 90-5 | WR300338090-5 | 37,0 | DN100 | 345 120 |
| WATERSTRY SB 90-5-2 | WR300338090-5-2 | 37,0 | DN100 | 337 200 |
| WATERSTRY SB 90-6 | WR300338090-6 | 45,0 | DN100 | 389 590 |
| WATERSTRY SB 90-6-2 | WR300338090-6-2 | 45,0 | DN100 | 381 670 |
| WATERSTRY SB 120-1 | WR3003380120-1 | 11,0 | DN125 | 302 690 |
| WATERSTRY SB 120-2 | WR3003380120-2 | 22,0 | DN125 | 433 850 |
| WATERSTRY SB 120-2-1 | WR3003380120-2-1 | 18,5 | DN125 | 397 540 |
| WATERSTRY SB 120-3 | WR3003380120-3 | 30,0 | DN125 | 540 090 |
| WATERSTRY SB 120-4-1 | WR3003380120-4-1 | 37,0 | DN125 | 599 040 |
| WATERSTRY SB 120-5-1 | WR3003380120-5-1 | 45,0 | DN125 | 691 800 |
| WATERSTRY SB 120-6-1 | WR3003380120-6-1 | 55,0 | DN125 | 834 670 |
| WATERSTRY SB 120-7 | WR3003380120-7 | 75,0 | DN125 | 1 002 270 |
| WATERSTRY SB 150-1 | WR3003380150-1 | 15,0 | DN150 | 320 690 |
| WATERSTRY SB 150-1-1 | WR3003380150-1-1 | 11,0 | DN150 | 304 070 |
| WATERSTRY SB 150-2-1 | WR3003380150-2-1 | 22,0 | DN150 | 430 220 |
| WATERSTRY SB 150-3 | WR3003380150-3 | 37,0 | DN150 | 559 990 |
| WATERSTRY SB 150-3-2 | WR3003380150-3-2 | 30,0 | DN150 | 545 170 |
| WATERSTRY SB 150-4-1 | WR3003380150-4-1 | 45,0 | DN150 | 655 210 |
| WATERSTRY SB 150-5-2 | WR3003380150-5-2 | 55,0 | DN150 | 799 600 |
| WATERSTRY SB 150-6 | WR3003380150-6 | 75,0 | DN150 | 972 100 |
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