"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 | 25 340 |
| WATERSTRY SB 1-3 | WR20133801-3ST | 0,37 | DN25 | 25 530 |
| WATERSTRY SB 1-4 | WR20133801-4ST | 0,37 | DN25 | 26 580 |
| WATERSTRY SB 1-5 | WR20133801-5ST | 0,37 | DN25 | 27 640 |
| WATERSTRY SB 1-6 | WR20133801-6ST | 0,37 | DN25 | 28 690 |
| WATERSTRY SB 1-7 | WR20133801-7ST | 0,37 | DN25 | 29 780 |
| WATERSTRY SB 1-8 | WR20133801-8ST | 0,55 | DN25 | 31 250 |
| WATERSTRY SB 1-9 | WR20133801-9ST | 0,55 | DN25 | 32 300 |
| WATERSTRY SB 1-10 | WR20133801-10ST | 0,55 | DN25 | 33 920 |
| WATERSTRY SB 1-11 | WR20133801-11 | 0,55 | DN25 | 26 470 |
| WATERSTRY SB 1-11 | WR20133801-11ST | 0,55 | DN25 | 34 970 |
| WATERSTRY SB 1-12 | WR30133801-12 | 0,55 | DN25 | 37 470 |
| WATERSTRY SB 1-13 | WR30133801-13 | 0,75 | DN25 | 38 540 |
| WATERSTRY SB 1-15 | WR30133801-15 | 0,75 | DN25 | 40 550 |
| WATERSTRY SB 1-17 | WR30133801-17 | 1,1 | DN25 | 47 770 |
| WATERSTRY SB 1-19 | WR30133801-19 | 1,1 | DN25 | 49 810 |
| WATERSTRY SB 1-21 | WR30133801-21 | 1,1 | DN25 | 52 400 |
| WATERSTRY SB 1-23 | WR30133801-23 | 1,1 | DN25 | 54 490 |
| WATERSTRY SB 1-25 | WR30133801-25 | 1,5 | DN25 | 60 320 |
| WATERSTRY SB 1-27 | WR30133801-27 | 1,5 | DN25 | 62 340 |
| WATERSTRY SB 1-30 | WR30133801-30 | 1,5 | DN25 | 66 060 |
| WATERSTRY SB 1-33 | WR30133801-33 | 2,2 | DN25 | 71 060 |
| WATERSTRY SB 1-36 | WR30133801-36 | 2,2 | DN25 | 74 060 |
| WATERSTRY SB 3-2 | WR20133803-2ST | 0,37 | DN25 | 25 330 |
| WATERSTRY SB 3-3 | WR20133803-3ST | 0,37 | DN25 | 25 520 |
| WATERSTRY SB 3-4 | WR20133803-4ST | 0,37 | DN25 | 26 560 |
| WATERSTRY SB 3-5 | WR20133803-5ST | 0,37 | DN25 | 27 620 |
| WATERSTRY SB 3-6 | WR20133803-6ST | 0,55 | DN25 | 29 070 |
| WATERSTRY SB 3-7 | WR20133803-7ST | 0,55 | DN25 | 30 150 |
| WATERSTRY SB 3-8 | WR30133803-8 | 0,75 | DN25 | 32 610 |
| WATERSTRY SB 3-9 | WR30133803-9 | 0,75 | DN25 | 33 660 |
| WATERSTRY SB 3-10 | WR30133803-10 | 0,75 | DN25 | 35 280 |
| WATERSTRY SB 3-11 | WR30133803-11 | 1,1 | DN25 | 41 510 |
| WATERSTRY SB 3-12 | WR30133803-12 | 1,1 | DN25 | 42 600 |
| WATERSTRY SB 3-13 | WR30133803-13 | 1,1 | DN25 | 43 660 |
| WATERSTRY SB 3-15 | WR30133803-15 | 1,1 | DN25 | 45 670 |
| WATERSTRY SB 3-17 | WR30133803-17 | 1,5 | DN25 | 51 400 |
| WATERSTRY SB 3-19 | WR30133803-19 | 1,5 | DN25 | 53 430 |
| WATERSTRY SB 3-21 | WR30133803-21 | 2,2 | DN25 | 58 010 |
| WATERSTRY SB 3-23 | WR30133803-23 | 2,2 | DN25 | 60 100 |
| WATERSTRY SB 3-25 | WR30133803-25 | 2,2 | DN25 | 62 200 |
| WATERSTRY SB 3-27 | WR30133803-27 | 2,2 | DN25 | 64 210 |
| WATERSTRY SB 3-29 | WR30133803-29 | 2,2 | DN25 | 66 810 |
| WATERSTRY SB 3-31 | WR30133803-31 | 3,0 | DN25 | 75 400 |
| WATERSTRY SB 3-33 | WR30133803-33 | 3,0 | DN25 | 77 420 |
| WATERSTRY SB 5-2 | WR20133805-2ST | 0,37 | DN25 | 25 060 |
| WATERSTRY SB 5-3 | WR20133805-3ST | 0,55 | DN25 | 26 670 |
| WATERSTRY SB 5-4 | WR20133805-4ST | 0,55 | DN25 | 27 860 |
| WATERSTRY SB 5-5 | WR20133805-5ST | 0,75 | DN25 | 28 490 |
| WATERSTRY SB 5-5 | WR30133805-5 | 0,75 | DN25 | 30 250 |
| WATERSTRY SB 5-6 | WR30133805-6 | 1,1 | DN25 | 36 630 |
| WATERSTRY SB 5-7 | WR30133805-7 | 1,1 | DN25 | 37 820 |
| WATERSTRY SB 5-8 | WR30133805-8 | 1,1 | DN25 | 39 640 |
| WATERSTRY SB 5-9 | WR30133805-9 | 1,5 | DN25 | 44 460 |
| WATERSTRY SB 5-10 | WR30133805-10 | 1,5 | DN25 | 45 790 |
| WATERSTRY SB 5-11 | WR30133805-11 | 2,2 | DN25 | 48 910 |
| WATERSTRY SB 5-12 | WR30133805-12 | 2,2 | DN25 | 50 300 |
| WATERSTRY SB 5-13 | WR30133805-13 | 2,2 | DN25 | 52 130 |
| WATERSTRY SB 5-14 | WR30133805-14 | 2,2 | DN25 | 53 320 |
| WATERSTRY SB 5-15 | WR30133805-15 | 2,2 | DN25 | 54 520 |
| WATERSTRY SB 5-16 | WR30133805-16 | 2,2 | DN25 | 55 770 |
| WATERSTRY SB 5-18 | WR30133805-18 | 3,0 | DN25 | 65 310 |
| WATERSTRY SB 5-20 | WR30133805-20 | 3,0 | DN25 | 67 780 |
| WATERSTRY SB 5-22 | WR30133805-22 | 4,0 | DN25 | 74 900 |
| WATERSTRY SB 5-24 | WR30133805-24 | 4,0 | DN25 | 78 310 |
| WATERSTRY SB 5-26 | WR30133805-26 | 4,0 | DN25 | 80 750 |
| WATERSTRY SB 5-29 | WR30133805-29 | 4,0 | DN25 | 84 980 |
| WATERSTRY SB 5-32 | WR30133805-32 | 5,5 | DN25 | 106 280 |
| WATERSTRY SB 5-36 | WR30133805-36 | 5,5 | DN25 | 112 490 |
| WATERSTRY SB 10-2 | WR30133810-2 | 0,75 | DN40 | 35 050 |
| WATERSTRY SB 10-3 | WR30133810-3 | 1,1 | DN40 | 42 800 |
| WATERSTRY SB 10-4 | WR30133810-4 | 1,5 | DN40 | 48 250 |
| WATERSTRY SB 10-5 | WR30133810-5 | 2,2 | DN40 | 52 440 |
| WATERSTRY SB 10-6 | WR30133810-6 | 2,2 | DN40 | 54 640 |
| WATERSTRY SB 10-7 | WR30133810-7 | 3,0 | DN40 | 63 850 |
| WATERSTRY SB 10-8 | WR30133810-8 | 3,0 | DN40 | 66 050 |
| WATERSTRY SB 10-9 | WR30133810-9 | 3,0 | DN40 | 69 010 |
| WATERSTRY SB 10-10 | WR30133810-10 | 4,0 | DN40 | 76 120 |
| WATERSTRY SB 10-12 | WR30133810-12 | 4,0 | DN40 | 80 810 |
| WATERSTRY SB 10-14 | WR30133810-14 | 5,5 | DN40 | 104 760 |
| WATERSTRY SB 10-16 | WR30133810-16 | 5,5 | DN40 | 110 280 |
| WATERSTRY SB 10-18 | WR30133810-18 | 7,5 | DN40 | 118 420 |
| WATERSTRY SB 10-20 | WR30133810-20 | 7,5 | DN40 | 123 490 |
| WATERSTRY SB 10-22 | WR30133810-22 | 7,5 | DN40 | 128 530 |
| WATERSTRY SB 15-1 | WR30133815-1 | 1,1 | DN50 | 43 650 |
| WATERSTRY SB 15-2 | WR30133815-2 | 2,2 | DN50 | 50 160 |
| WATERSTRY SB 15-3 | WR30133815-3 | 3,0 | DN50 | 60 150 |
| WATERSTRY SB 15-4 | WR30133815-4 | 4,0 | DN50 | 68 240 |
| WATERSTRY SB 15-5 | WR30133815-5 | 4,0 | DN50 | 72 250 |
| WATERSTRY SB 15-6 | WR30133815-6 | 5,5 | DN50 | 94 740 |
| WATERSTRY SB 15-7 | WR30133815-7 | 5,5 | DN50 | 99 580 |
| WATERSTRY SB 15-8 | WR30133815-8 | 7,5 | DN50 | 106 340 |
| WATERSTRY SB 15-9 | WR30133815-9 | 7,5 | DN50 | 110 430 |
| WATERSTRY SB 15-10 | WR30133815-10 | 11,0 | DN50 | 144 200 |
| WATERSTRY SB 15-12 | WR30133815-12 | 11,0 | DN50 | 152 000 |
| WATERSTRY SB 15-14 | WR30133815-14 | 11,0 | DN50 | 159 100 |
| WATERSTRY SB 20-1 | WR30133820-1 | 1,1 | DN50 | 43 660 |
| WATERSTRY SB 20-2 | WR30133820-2 | 2,2 | DN50 | 50 180 |
| WATERSTRY SB 20-3 | WR30133820-3 | 4,0 | DN50 | 64 290 |
| WATERSTRY SB 20-4 | WR300338020-4 | 5,5 | DN50 | 86 670 |
| WATERSTRY SB 20-4 | WR30133820-4 | 5,5 | DN50 | 81 080 |
| WATERSTRY SB 20-5 | WR300338020-5 | 5,5 | DN50 | 90 760 |
| WATERSTRY SB 20-5 | WR30133820-5 | 5,5 | DN50 | 84 910 |
| WATERSTRY SB 20-6 | WR30133820-6 | 7,5 | DN50 | 97 500 |
| WATERSTRY SB 20-7 | WR30133820-7 | 7,5 | DN50 | 102 350 |
| WATERSTRY SB 20-8 | WR30133820-8 | 11,0 | DN50 | 134 660 |
| WATERSTRY SB 20-10 | WR30133820-10 | 11,0 | DN50 | 144 270 |
| WATERSTRY SB 20-12 | WR30133820-12 | 15,0 | DN50 | 158 370 |
| WATERSTRY SB 20-14 | WR30133820-14 | 15,0 | DN50 | 165 480 |
| WATERSTRY SB 20-17 | WR30133820-17 | 18,5 | DN50 | 204 820 |
| WATERSTRY SB 32-1 | WR301338032-1 | 2,2 | DN65 | 68 820 |
| WATERSTRY SB 32-1-1 | WR301338032-1-1 | 1,5 | DN65 | 66 870 |
| WATERSTRY SB 32-2 | WR301338032-2 | 4,0 | DN65 | 88 580 |
| WATERSTRY SB 32-2-2 | WR301338032-2-2 | 3,0 | DN65 | 83 530 |
| WATERSTRY SB 32-3 | WR300338032-3 | 5,5 | DN65 | 102 710 |
| WATERSTRY SB 32-3 | WR301338032-3 | 5,5 | DN65 | 116 250 |
| WATERSTRY SB 32-3-2 | WR301338032-3-2 | 5,5 | DN65 | 116 350 |
| WATERSTRY SB 32-4 | WR301338032-4 | 7,5 | DN65 | 129 300 |
| WATERSTRY SB 32-4-2 | WR301338032-4-2 | 7,5 | DN65 | 129 410 |
| WATERSTRY SB 32-4-2 | WR300338032-4-2 | 7,5 | DN65 | 114 340 |
| WATERSTRY SB 32-5 | WR301338032-5 | 11,0 | DN65 | 167 630 |
| WATERSTRY SB 32-5-2 | WR301338032-5-2 | 11,0 | DN65 | 167 730 |
| WATERSTRY SB 32-6 | WR301338032-6 | 11,0 | DN65 | 175 590 |
| WATERSTRY SB 32-6-2 | WR301338032-6-2 | 11,0 | DN65 | 175 690 |
| WATERSTRY SB 32-7 | WR301338032-7 | 15,0 | DN65 | 190 000 |
| WATERSTRY SB 32-7-2 | WR301338032-7-2 | 15,0 | DN65 | 190 110 |
| WATERSTRY SB 32-7-2 | WR300338032-7-2 | 15,0 | DN65 | 167 960 |
| WATERSTRY SB 32-8 | WR301338032-8 | 15,0 | DN65 | 201 410 |
| WATERSTRY SB 32-8-2 | WR301338032-8-2 | 15,0 | DN65 | 201 510 |
| WATERSTRY SB 32-9 | WR301338032-9 | 18,5 | DN65 | 238 010 |
| WATERSTRY SB 32-9-2 | WR301338032-9-2 | 18,5 | DN65 | 238 200 |
| WATERSTRY SB 32-10 | WR301338032-10 | 18,5 | DN65 | 246 070 |
| WATERSTRY SB 32-10-2 | WR301338032-10-2 | 18,5 | DN65 | 246 170 |
| WATERSTRY SB 32-11 | WR301338032-11 | 22,0 | DN65 | 286 680 |
| WATERSTRY SB 32-11-2 | WR301338032-11-2 | 22,0 | DN65 | 286 800 |
| WATERSTRY SB 32-12 | WR301338032-12 | 22,0 | DN65 | 296 000 |
| WATERSTRY SB 32-12-2 | WR301338032-12-2 | 22,0 | DN65 | 296 120 |
| WATERSTRY SB 32-13 | WR301338032-13 | 30,0 | DN65 | 334 370 |
| WATERSTRY SB 32-13-2 | WR301338032-13-2 | 30,0 | DN65 | 334 490 |
| WATERSTRY SB 32-14 | WR301338032-14 | 30,0 | DN65 | 343 730 |
| WATERSTRY SB 32-14-2 | WR301338032-14-2 | 30,0 | DN65 | 343 850 |
| WATERSTRY SB 45-1 | WR300338045-1 | 4,0 | DN80 | 91 590 |
| WATERSTRY SB 45-1-1 | WR300338045-1-1 | 3,0 | DN80 | 86 490 |
| WATERSTRY SB 45-2 | WR300338045-2 | 7,5 | DN80 | 122 370 |
| WATERSTRY SB 45-2-2 | WR300338045-2-2 | 5,5 | DN80 | 118 260 |
| WATERSTRY SB 45-3 | WR300338045-3 | 11,0 | DN80 | 168 310 |
| WATERSTRY SB 45-3-2 | WR300338045-3-2 | 11,0 | DN80 | 168 430 |
| WATERSTRY SB 45-4 | WR300338045-4 | 15,0 | DN80 | 184 850 |
| WATERSTRY SB 45-4-2 | WR300338045-4-2 | 15,0 | DN80 | 184 960 |
| WATERSTRY SB 45-5 | WR300338045-5 | 18,5 | DN80 | 223 880 |
| WATERSTRY SB 45-5-2 | WR300338045-5-2 | 18,5 | DN80 | 224 000 |
| WATERSTRY SB 45-6 | WR300338045-6 | 22,0 | DN80 | 263 820 |
| WATERSTRY SB 45-6-2 | WR300338045-6-2 | 22,0 | DN80 | 263 950 |
| WATERSTRY SB 45-7 | WR300338045-7 | 30,0 | DN80 | 305 810 |
| WATERSTRY SB 45-7-2 | WR300338045-7-2 | 30,0 | DN80 | 305 950 |
| WATERSTRY SB 45-8 | WR300338045-8 | 30,0 | DN80 | 322 340 |
| WATERSTRY SB 45-8-2 | WR300338045-8-2 | 30,0 | DN80 | 322 470 |
| WATERSTRY SB 45-9 | WR300338045-9 | 37,0 | DN80 | 355 250 |
| WATERSTRY SB 45-9-2 | WR300338045-9-2 | 30,0 | DN80 | 334 460 |
| WATERSTRY SB 45-10 | WR300338045-10 | 37,0 | DN80 | 368 090 |
| WATERSTRY SB 45-10-2 | WR300338045-10-2 | 37,0 | DN80 | 368 230 |
| WATERSTRY SB 45-11 | WR300338045-11 | 45,0 | DN80 | 406 450 |
| WATERSTRY SB 45-11-2 | WR300338045-11-2 | 45,0 | DN80 | 406 590 |
| WATERSTRY SB 45-12 | WR300338045-12 | 45,0 | DN80 | 419 060 |
| WATERSTRY SB 45-12-2 | WR300338045-12-2 | 45,0 | DN80 | 419 200 |
| WATERSTRY SB 45-13-2 | WR300338045-13-2 | 45,0 | DN80 | 431 820 |
| WATERSTRY SB 64-1 | WR300338064-1 | 5,5 | DN100 | 113 410 |
| WATERSTRY SB 64-1-1 | WR300338064-1-1 | 4,0 | DN100 | 97 100 |
| WATERSTRY SB 64-2 | WR300338064-2 | 11,0 | DN100 | 161 600 |
| WATERSTRY SB 64-2-1 | WR300338064-2-1 | 11,0 | DN100 | 161 660 |
| WATERSTRY SB 64-2-2 | WR300338064-2-2 | 7,5 | DN100 | 130 400 |
| WATERSTRY SB 64-3 | WR300338064-3 | 18,5 | DN100 | 213 150 |
| WATERSTRY SB 64-3-1 | WR300338064-3-1 | 15,0 | DN100 | 184 240 |
| WATERSTRY SB 64-3-2 | WR300338064-3-2 | 15,0 | DN100 | 184 300 |
| WATERSTRY SB 64-4 | WR300338064-4 | 22,0 | DN100 | 254 880 |
| WATERSTRY SB 64-4-1 | WR300338064-4-1 | 22,0 | DN100 | 254 950 |
| WATERSTRY SB 64-4-2 | WR300338064-4-2 | 18,5 | DN100 | 224 640 |
| WATERSTRY SB 64-5 | WR300338064-5 | 30,0 | DN100 | 298 700 |
| WATERSTRY SB 64-5-1 | WR300338064-5-1 | 30,0 | DN100 | 298 770 |
| WATERSTRY SB 64-5-2 | WR300338064-5-2 | 30,0 | DN100 | 298 850 |
| WATERSTRY SB 64-6 | WR300338064-6 | 37,0 | DN100 | 332 440 |
| WATERSTRY SB 64-6-1 | WR300338064-6-1 | 37,0 | DN100 | 332 510 |
| WATERSTRY SB 64-6-2 | WR300338064-6-2 | 30,0 | DN100 | 312 630 |
| WATERSTRY SB 64-7 | WR300338064-7 | 45,0 | DN100 | 372 620 |
| WATERSTRY SB 64-7-1 | WR300338064-7-1 | 37,0 | DN100 | 346 840 |
| WATERSTRY SB 64-7-2 | WR300338064-7-2 | 37,0 | DN100 | 347 850 |
| WATERSTRY SB 64-8-1 | WR300338064-8-1 | 45,0 | DN100 | 392 740 |
| WATERSTRY SB 64-8-2 | WR300338064-8-2 | 45,0 | DN100 | 392 810 |
| WATERSTRY SB 90-1 | WR300338090-1 | 7,5 | DN100 | 128 090 |
| WATERSTRY SB 90-1-1 | WR300338090-1-1 | 5,5 | DN100 | 119 830 |
| WATERSTRY SB 90-2 | WR300338090-2 | 15,0 | DN100 | 183 440 |
| WATERSTRY SB 90-2-2 | WR300338090-2-2 | 11,0 | DN100 | 170 530 |
| WATERSTRY SB 90-3 | WR300338090-3 | 22,0 | DN100 | 262 680 |
| WATERSTRY SB 90-3-2 | WR300338090-3-2 | 18,5 | DN100 | 225 620 |
| WATERSTRY SB 90-4 | WR300338090-4 | 30,0 | DN100 | 312 000 |
| WATERSTRY SB 90-4-2 | WR300338090-4-2 | 30,0 | DN100 | 304 280 |
| WATERSTRY SB 90-5 | WR300338090-5 | 37,0 | DN100 | 353 220 |
| WATERSTRY SB 90-5-2 | WR300338090-5-2 | 37,0 | DN100 | 345 110 |
| WATERSTRY SB 90-6 | WR300338090-6 | 45,0 | DN100 | 398 730 |
| WATERSTRY SB 90-6-2 | WR300338090-6-2 | 45,0 | DN100 | 390 620 |
| WATERSTRY SB 120-1 | WR3003380120-1 | 11,0 | DN125 | 309 800 |
| WATERSTRY SB 120-2 | WR3003380120-2 | 22,0 | DN125 | 444 030 |
| WATERSTRY SB 120-2-1 | WR3003380120-2-1 | 18,5 | DN125 | 406 870 |
| WATERSTRY SB 120-3 | WR3003380120-3 | 30,0 | DN125 | 552 760 |
| WATERSTRY SB 120-4-1 | WR3003380120-4-1 | 37,0 | DN125 | 613 100 |
| WATERSTRY SB 120-5-1 | WR3003380120-5-1 | 45,0 | DN125 | 708 030 |
| WATERSTRY SB 120-6-1 | WR3003380120-6-1 | 55,0 | DN125 | 854 260 |
| WATERSTRY SB 120-7 | WR3003380120-7 | 75,0 | DN125 | 1 025 790 |
| WATERSTRY SB 150-1 | WR3003380150-1 | 15,0 | DN150 | 328 210 |
| WATERSTRY SB 150-1-1 | WR3003380150-1-1 | 11,0 | DN150 | 311 200 |
| WATERSTRY SB 150-2-1 | WR3003380150-2-1 | 22,0 | DN150 | 440 320 |
| WATERSTRY SB 150-3 | WR3003380150-3 | 37,0 | DN150 | 573 130 |
| WATERSTRY SB 150-3-2 | WR3003380150-3-2 | 30,0 | DN150 | 557 960 |
| WATERSTRY SB 150-4-1 | WR3003380150-4-1 | 45,0 | DN150 | 670 580 |
| WATERSTRY SB 150-5-2 | WR3003380150-5-2 | 55,0 | DN150 | 818 360 |
| WATERSTRY SB 150-6 | WR3003380150-6 | 75,0 | DN150 | 994 900 |
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