"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 | 24 820 |
| WATERSTRY SB 1-3 | WR20133801-3ST | 0,37 | DN25 | 25 010 |
| WATERSTRY SB 1-4 | WR20133801-4ST | 0,37 | DN25 | 26 040 |
| WATERSTRY SB 1-5 | WR20133801-5ST | 0,37 | DN25 | 27 080 |
| WATERSTRY SB 1-6 | WR20133801-6ST | 0,37 | DN25 | 28 110 |
| WATERSTRY SB 1-7 | WR20133801-7ST | 0,37 | DN25 | 29 170 |
| WATERSTRY SB 1-8 | WR20133801-8ST | 0,55 | DN25 | 30 610 |
| WATERSTRY SB 1-9 | WR20133801-9ST | 0,55 | DN25 | 31 640 |
| WATERSTRY SB 1-10 | WR20133801-10ST | 0,55 | DN25 | 33 230 |
| WATERSTRY SB 1-11 | WR20133801-11 | 0,55 | DN25 | 25 920 |
| WATERSTRY SB 1-11 | WR20133801-11ST | 0,55 | DN25 | 34 250 |
| WATERSTRY SB 1-12 | WR30133801-12 | 0,55 | DN25 | 36 700 |
| WATERSTRY SB 1-13 | WR30133801-13 | 0,75 | DN25 | 37 750 |
| WATERSTRY SB 1-15 | WR30133801-15 | 0,75 | DN25 | 39 720 |
| WATERSTRY SB 1-17 | WR30133801-17 | 1,1 | DN25 | 46 790 |
| WATERSTRY SB 1-19 | WR30133801-19 | 1,1 | DN25 | 48 780 |
| WATERSTRY SB 1-21 | WR30133801-21 | 1,1 | DN25 | 51 320 |
| WATERSTRY SB 1-23 | WR30133801-23 | 1,1 | DN25 | 53 370 |
| WATERSTRY SB 1-25 | WR30133801-25 | 1,5 | DN25 | 59 080 |
| WATERSTRY SB 1-27 | WR30133801-27 | 1,5 | DN25 | 61 060 |
| WATERSTRY SB 1-30 | WR30133801-30 | 1,5 | DN25 | 64 700 |
| WATERSTRY SB 1-33 | WR30133801-33 | 2,2 | DN25 | 69 600 |
| WATERSTRY SB 1-36 | WR30133801-36 | 2,2 | DN25 | 72 540 |
| WATERSTRY SB 3-2 | WR20133803-2ST | 0,37 | DN25 | 24 810 |
| WATERSTRY SB 3-3 | WR20133803-3ST | 0,37 | DN25 | 25 000 |
| WATERSTRY SB 3-4 | WR20133803-4ST | 0,37 | DN25 | 26 020 |
| WATERSTRY SB 3-5 | WR20133803-5ST | 0,37 | DN25 | 27 060 |
| WATERSTRY SB 3-6 | WR20133803-6ST | 0,55 | DN25 | 28 470 |
| WATERSTRY SB 3-7 | WR20133803-7ST | 0,55 | DN25 | 29 530 |
| WATERSTRY SB 3-8 | WR30133803-8 | 0,75 | DN25 | 31 950 |
| WATERSTRY SB 3-9 | WR30133803-9 | 0,75 | DN25 | 32 970 |
| WATERSTRY SB 3-10 | WR30133803-10 | 0,75 | DN25 | 34 560 |
| WATERSTRY SB 3-11 | WR30133803-11 | 1,1 | DN25 | 40 660 |
| WATERSTRY SB 3-12 | WR30133803-12 | 1,1 | DN25 | 41 730 |
| WATERSTRY SB 3-13 | WR30133803-13 | 1,1 | DN25 | 42 770 |
| WATERSTRY SB 3-15 | WR30133803-15 | 1,1 | DN25 | 44 730 |
| WATERSTRY SB 3-17 | WR30133803-17 | 1,5 | DN25 | 50 350 |
| WATERSTRY SB 3-19 | WR30133803-19 | 1,5 | DN25 | 52 330 |
| WATERSTRY SB 3-21 | WR30133803-21 | 2,2 | DN25 | 56 820 |
| WATERSTRY SB 3-23 | WR30133803-23 | 2,2 | DN25 | 58 870 |
| WATERSTRY SB 3-25 | WR30133803-25 | 2,2 | DN25 | 60 930 |
| WATERSTRY SB 3-27 | WR30133803-27 | 2,2 | DN25 | 62 890 |
| WATERSTRY SB 3-29 | WR30133803-29 | 2,2 | DN25 | 65 440 |
| WATERSTRY SB 3-31 | WR30133803-31 | 3,0 | DN25 | 73 850 |
| WATERSTRY SB 3-33 | WR30133803-33 | 3,0 | DN25 | 75 830 |
| WATERSTRY SB 5-2 | WR20133805-2ST | 0,37 | DN25 | 24 550 |
| WATERSTRY SB 5-3 | WR20133805-3ST | 0,55 | DN25 | 26 120 |
| WATERSTRY SB 5-4 | WR20133805-4ST | 0,55 | DN25 | 27 290 |
| WATERSTRY SB 5-5 | WR20133805-5ST | 0,75 | DN25 | 27 900 |
| WATERSTRY SB 5-5 | WR30133805-5 | 0,75 | DN25 | 29 630 |
| WATERSTRY SB 5-6 | WR30133805-6 | 1,1 | DN25 | 35 880 |
| WATERSTRY SB 5-7 | WR30133805-7 | 1,1 | DN25 | 37 040 |
| WATERSTRY SB 5-8 | WR30133805-8 | 1,1 | DN25 | 38 830 |
| WATERSTRY SB 5-9 | WR30133805-9 | 1,5 | DN25 | 43 550 |
| WATERSTRY SB 5-10 | WR30133805-10 | 1,5 | DN25 | 44 850 |
| WATERSTRY SB 5-11 | WR30133805-11 | 2,2 | DN25 | 47 910 |
| WATERSTRY SB 5-12 | WR30133805-12 | 2,2 | DN25 | 49 270 |
| WATERSTRY SB 5-13 | WR30133805-13 | 2,2 | DN25 | 51 060 |
| WATERSTRY SB 5-14 | WR30133805-14 | 2,2 | DN25 | 52 220 |
| WATERSTRY SB 5-15 | WR30133805-15 | 2,2 | DN25 | 53 400 |
| WATERSTRY SB 5-16 | WR30133805-16 | 2,2 | DN25 | 54 620 |
| WATERSTRY SB 5-18 | WR30133805-18 | 3,0 | DN25 | 63 970 |
| WATERSTRY SB 5-20 | WR30133805-20 | 3,0 | DN25 | 66 390 |
| WATERSTRY SB 5-22 | WR30133805-22 | 4,0 | DN25 | 73 370 |
| WATERSTRY SB 5-24 | WR30133805-24 | 4,0 | DN25 | 76 700 |
| WATERSTRY SB 5-26 | WR30133805-26 | 4,0 | DN25 | 79 090 |
| WATERSTRY SB 5-29 | WR30133805-29 | 4,0 | DN25 | 83 240 |
| WATERSTRY SB 5-32 | WR30133805-32 | 5,5 | DN25 | 104 100 |
| WATERSTRY SB 5-36 | WR30133805-36 | 5,5 | DN25 | 110 180 |
| WATERSTRY SB 10-2 | WR30133810-2 | 0,75 | DN40 | 34 330 |
| WATERSTRY SB 10-3 | WR30133810-3 | 1,1 | DN40 | 41 930 |
| WATERSTRY SB 10-4 | WR30133810-4 | 1,5 | DN40 | 47 260 |
| WATERSTRY SB 10-5 | WR30133810-5 | 2,2 | DN40 | 51 360 |
| WATERSTRY SB 10-6 | WR30133810-6 | 2,2 | DN40 | 53 520 |
| WATERSTRY SB 10-7 | WR30133810-7 | 3,0 | DN40 | 62 540 |
| WATERSTRY SB 10-8 | WR30133810-8 | 3,0 | DN40 | 64 700 |
| WATERSTRY SB 10-9 | WR30133810-9 | 3,0 | DN40 | 67 590 |
| WATERSTRY SB 10-10 | WR30133810-10 | 4,0 | DN40 | 74 550 |
| WATERSTRY SB 10-12 | WR30133810-12 | 4,0 | DN40 | 79 150 |
| WATERSTRY SB 10-14 | WR30133810-14 | 5,5 | DN40 | 102 610 |
| WATERSTRY SB 10-16 | WR30133810-16 | 5,5 | DN40 | 108 020 |
| WATERSTRY SB 10-18 | WR30133810-18 | 7,5 | DN40 | 115 990 |
| WATERSTRY SB 10-20 | WR30133810-20 | 7,5 | DN40 | 120 960 |
| WATERSTRY SB 10-22 | WR30133810-22 | 7,5 | DN40 | 125 890 |
| WATERSTRY SB 15-1 | WR30133815-1 | 1,1 | DN50 | 42 760 |
| WATERSTRY SB 15-2 | WR30133815-2 | 2,2 | DN50 | 49 130 |
| WATERSTRY SB 15-3 | WR30133815-3 | 3,0 | DN50 | 58 920 |
| WATERSTRY SB 15-4 | WR30133815-4 | 4,0 | DN50 | 66 840 |
| WATERSTRY SB 15-5 | WR30133815-5 | 4,0 | DN50 | 70 770 |
| WATERSTRY SB 15-6 | WR30133815-6 | 5,5 | DN50 | 92 800 |
| WATERSTRY SB 15-7 | WR30133815-7 | 5,5 | DN50 | 97 540 |
| WATERSTRY SB 15-8 | WR30133815-8 | 7,5 | DN50 | 104 160 |
| WATERSTRY SB 15-9 | WR30133815-9 | 7,5 | DN50 | 108 160 |
| WATERSTRY SB 15-10 | WR30133815-10 | 11,0 | DN50 | 141 250 |
| WATERSTRY SB 15-12 | WR30133815-12 | 11,0 | DN50 | 148 880 |
| WATERSTRY SB 15-14 | WR30133815-14 | 11,0 | DN50 | 155 840 |
| WATERSTRY SB 20-1 | WR30133820-1 | 1,1 | DN50 | 42 770 |
| WATERSTRY SB 20-2 | WR30133820-2 | 2,2 | DN50 | 49 150 |
| WATERSTRY SB 20-3 | WR30133820-3 | 4,0 | DN50 | 62 980 |
| WATERSTRY SB 20-4 | WR300338020-4 | 5,5 | DN50 | 84 890 |
| WATERSTRY SB 20-4 | WR30133820-4 | 5,5 | DN50 | 79 410 |
| WATERSTRY SB 20-5 | WR300338020-5 | 5,5 | DN50 | 88 900 |
| WATERSTRY SB 20-5 | WR30133820-5 | 5,5 | DN50 | 83 160 |
| WATERSTRY SB 20-6 | WR30133820-6 | 7,5 | DN50 | 95 500 |
| WATERSTRY SB 20-7 | WR30133820-7 | 7,5 | DN50 | 100 250 |
| WATERSTRY SB 20-8 | WR30133820-8 | 11,0 | DN50 | 131 900 |
| WATERSTRY SB 20-10 | WR30133820-10 | 11,0 | DN50 | 141 320 |
| WATERSTRY SB 20-12 | WR30133820-12 | 15,0 | DN50 | 155 120 |
| WATERSTRY SB 20-14 | WR30133820-14 | 15,0 | DN50 | 162 090 |
| WATERSTRY SB 20-17 | WR30133820-17 | 18,5 | DN50 | 200 620 |
| WATERSTRY SB 32-1 | WR301338032-1 | 2,2 | DN65 | 67 400 |
| WATERSTRY SB 32-1-1 | WR301338032-1-1 | 1,5 | DN65 | 65 500 |
| WATERSTRY SB 32-2 | WR301338032-2 | 4,0 | DN65 | 86 770 |
| WATERSTRY SB 32-2-2 | WR301338032-2-2 | 3,0 | DN65 | 81 820 |
| WATERSTRY SB 32-3 | WR300338032-3 | 5,5 | DN65 | 100 600 |
| WATERSTRY SB 32-3 | WR301338032-3 | 5,5 | DN65 | 113 860 |
| WATERSTRY SB 32-3-2 | WR301338032-3-2 | 5,5 | DN65 | 113 960 |
| WATERSTRY SB 32-4 | WR301338032-4 | 7,5 | DN65 | 126 640 |
| WATERSTRY SB 32-4-2 | WR301338032-4-2 | 7,5 | DN65 | 126 760 |
| WATERSTRY SB 32-4-2 | WR300338032-4-2 | 7,5 | DN65 | 112 000 |
| WATERSTRY SB 32-5 | WR301338032-5 | 11,0 | DN65 | 164 190 |
| WATERSTRY SB 32-5-2 | WR301338032-5-2 | 11,0 | DN65 | 164 290 |
| WATERSTRY SB 32-6 | WR301338032-6 | 11,0 | DN65 | 171 990 |
| WATERSTRY SB 32-6-2 | WR301338032-6-2 | 11,0 | DN65 | 172 090 |
| WATERSTRY SB 32-7 | WR301338032-7 | 15,0 | DN65 | 186 110 |
| WATERSTRY SB 32-7-2 | WR301338032-7-2 | 15,0 | DN65 | 186 210 |
| WATERSTRY SB 32-7-2 | WR300338032-7-2 | 15,0 | DN65 | 164 520 |
| WATERSTRY SB 32-8 | WR301338032-8 | 15,0 | DN65 | 197 280 |
| WATERSTRY SB 32-8-2 | WR301338032-8-2 | 15,0 | DN65 | 197 380 |
| WATERSTRY SB 32-9 | WR301338032-9 | 18,5 | DN65 | 233 130 |
| WATERSTRY SB 32-9-2 | WR301338032-9-2 | 18,5 | DN65 | 233 310 |
| WATERSTRY SB 32-10 | WR301338032-10 | 18,5 | DN65 | 241 020 |
| WATERSTRY SB 32-10-2 | WR301338032-10-2 | 18,5 | DN65 | 241 120 |
| WATERSTRY SB 32-11 | WR301338032-11 | 22,0 | DN65 | 280 800 |
| WATERSTRY SB 32-11-2 | WR301338032-11-2 | 22,0 | DN65 | 280 910 |
| WATERSTRY SB 32-12 | WR301338032-12 | 22,0 | DN65 | 289 930 |
| WATERSTRY SB 32-12-2 | WR301338032-12-2 | 22,0 | DN65 | 290 040 |
| WATERSTRY SB 32-13 | WR301338032-13 | 30,0 | DN65 | 327 510 |
| WATERSTRY SB 32-13-2 | WR301338032-13-2 | 30,0 | DN65 | 327 630 |
| WATERSTRY SB 32-14 | WR301338032-14 | 30,0 | DN65 | 336 680 |
| WATERSTRY SB 32-14-2 | WR301338032-14-2 | 30,0 | DN65 | 336 800 |
| WATERSTRY SB 45-1 | WR300338045-1 | 4,0 | DN80 | 89 710 |
| WATERSTRY SB 45-1-1 | WR300338045-1-1 | 3,0 | DN80 | 84 710 |
| WATERSTRY SB 45-2 | WR300338045-2 | 7,5 | DN80 | 119 860 |
| WATERSTRY SB 45-2-2 | WR300338045-2-2 | 5,5 | DN80 | 115 840 |
| WATERSTRY SB 45-3 | WR300338045-3 | 11,0 | DN80 | 164 860 |
| WATERSTRY SB 45-3-2 | WR300338045-3-2 | 11,0 | DN80 | 164 970 |
| WATERSTRY SB 45-4 | WR300338045-4 | 15,0 | DN80 | 181 060 |
| WATERSTRY SB 45-4-2 | WR300338045-4-2 | 15,0 | DN80 | 181 170 |
| WATERSTRY SB 45-5 | WR300338045-5 | 18,5 | DN80 | 219 290 |
| WATERSTRY SB 45-5-2 | WR300338045-5-2 | 18,5 | DN80 | 219 400 |
| WATERSTRY SB 45-6 | WR300338045-6 | 22,0 | DN80 | 258 410 |
| WATERSTRY SB 45-6-2 | WR300338045-6-2 | 22,0 | DN80 | 258 540 |
| WATERSTRY SB 45-7 | WR300338045-7 | 30,0 | DN80 | 299 540 |
| WATERSTRY SB 45-7-2 | WR300338045-7-2 | 30,0 | DN80 | 299 670 |
| WATERSTRY SB 45-8 | WR300338045-8 | 30,0 | DN80 | 315 730 |
| WATERSTRY SB 45-8-2 | WR300338045-8-2 | 30,0 | DN80 | 315 860 |
| WATERSTRY SB 45-9 | WR300338045-9 | 37,0 | DN80 | 347 960 |
| WATERSTRY SB 45-9-2 | WR300338045-9-2 | 30,0 | DN80 | 327 600 |
| WATERSTRY SB 45-10 | WR300338045-10 | 37,0 | DN80 | 360 540 |
| WATERSTRY SB 45-10-2 | WR300338045-10-2 | 37,0 | DN80 | 360 670 |
| WATERSTRY SB 45-11 | WR300338045-11 | 45,0 | DN80 | 398 110 |
| WATERSTRY SB 45-11-2 | WR300338045-11-2 | 45,0 | DN80 | 398 250 |
| WATERSTRY SB 45-12 | WR300338045-12 | 45,0 | DN80 | 410 470 |
| WATERSTRY SB 45-12-2 | WR300338045-12-2 | 45,0 | DN80 | 410 610 |
| WATERSTRY SB 45-13-2 | WR300338045-13-2 | 45,0 | DN80 | 422 960 |
| WATERSTRY SB 64-1 | WR300338064-1 | 5,5 | DN100 | 111 090 |
| WATERSTRY SB 64-1-1 | WR300338064-1-1 | 4,0 | DN100 | 95 110 |
| WATERSTRY SB 64-2 | WR300338064-2 | 11,0 | DN100 | 158 290 |
| WATERSTRY SB 64-2-1 | WR300338064-2-1 | 11,0 | DN100 | 158 350 |
| WATERSTRY SB 64-2-2 | WR300338064-2-2 | 7,5 | DN100 | 127 720 |
| WATERSTRY SB 64-3 | WR300338064-3 | 18,5 | DN100 | 208 780 |
| WATERSTRY SB 64-3-1 | WR300338064-3-1 | 15,0 | DN100 | 180 460 |
| WATERSTRY SB 64-3-2 | WR300338064-3-2 | 15,0 | DN100 | 180 520 |
| WATERSTRY SB 64-4 | WR300338064-4 | 22,0 | DN100 | 249 650 |
| WATERSTRY SB 64-4-1 | WR300338064-4-1 | 22,0 | DN100 | 249 720 |
| WATERSTRY SB 64-4-2 | WR300338064-4-2 | 18,5 | DN100 | 220 030 |
| WATERSTRY SB 64-5 | WR300338064-5 | 30,0 | DN100 | 292 580 |
| WATERSTRY SB 64-5-1 | WR300338064-5-1 | 30,0 | DN100 | 292 650 |
| WATERSTRY SB 64-5-2 | WR300338064-5-2 | 30,0 | DN100 | 292 720 |
| WATERSTRY SB 64-6 | WR300338064-6 | 37,0 | DN100 | 325 620 |
| WATERSTRY SB 64-6-1 | WR300338064-6-1 | 37,0 | DN100 | 325 690 |
| WATERSTRY SB 64-6-2 | WR300338064-6-2 | 30,0 | DN100 | 306 220 |
| WATERSTRY SB 64-7 | WR300338064-7 | 45,0 | DN100 | 364 970 |
| WATERSTRY SB 64-7-1 | WR300338064-7-1 | 37,0 | DN100 | 339 730 |
| WATERSTRY SB 64-7-2 | WR300338064-7-2 | 37,0 | DN100 | 340 720 |
| WATERSTRY SB 64-8-1 | WR300338064-8-1 | 45,0 | DN100 | 384 680 |
| WATERSTRY SB 64-8-2 | WR300338064-8-2 | 45,0 | DN100 | 384 750 |
| WATERSTRY SB 90-1 | WR300338090-1 | 7,5 | DN100 | 125 460 |
| WATERSTRY SB 90-1-1 | WR300338090-1-1 | 5,5 | DN100 | 117 370 |
| WATERSTRY SB 90-2 | WR300338090-2 | 15,0 | DN100 | 179 670 |
| WATERSTRY SB 90-2-2 | WR300338090-2-2 | 11,0 | DN100 | 167 030 |
| WATERSTRY SB 90-3 | WR300338090-3 | 22,0 | DN100 | 257 300 |
| WATERSTRY SB 90-3-2 | WR300338090-3-2 | 18,5 | DN100 | 220 990 |
| WATERSTRY SB 90-4 | WR300338090-4 | 30,0 | DN100 | 305 600 |
| WATERSTRY SB 90-4-2 | WR300338090-4-2 | 30,0 | DN100 | 298 040 |
| WATERSTRY SB 90-5 | WR300338090-5 | 37,0 | DN100 | 345 970 |
| WATERSTRY SB 90-5-2 | WR300338090-5-2 | 37,0 | DN100 | 338 030 |
| WATERSTRY SB 90-6 | WR300338090-6 | 45,0 | DN100 | 390 550 |
| WATERSTRY SB 90-6-2 | WR300338090-6-2 | 45,0 | DN100 | 382 610 |
| WATERSTRY SB 120-1 | WR3003380120-1 | 11,0 | DN125 | 303 440 |
| WATERSTRY SB 120-2 | WR3003380120-2 | 22,0 | DN125 | 434 920 |
| WATERSTRY SB 120-2-1 | WR3003380120-2-1 | 18,5 | DN125 | 398 520 |
| WATERSTRY SB 120-3 | WR3003380120-3 | 30,0 | DN125 | 541 420 |
| WATERSTRY SB 120-4-1 | WR3003380120-4-1 | 37,0 | DN125 | 600 520 |
| WATERSTRY SB 120-5-1 | WR3003380120-5-1 | 45,0 | DN125 | 693 510 |
| WATERSTRY SB 120-6-1 | WR3003380120-6-1 | 55,0 | DN125 | 836 730 |
| WATERSTRY SB 120-7 | WR3003380120-7 | 75,0 | DN125 | 1 004 750 |
| WATERSTRY SB 150-1 | WR3003380150-1 | 15,0 | DN150 | 321 480 |
| WATERSTRY SB 150-1-1 | WR3003380150-1-1 | 11,0 | DN150 | 304 820 |
| WATERSTRY SB 150-2-1 | WR3003380150-2-1 | 22,0 | DN150 | 431 290 |
| WATERSTRY SB 150-3 | WR3003380150-3 | 37,0 | DN150 | 561 370 |
| WATERSTRY SB 150-3-2 | WR3003380150-3-2 | 30,0 | DN150 | 546 520 |
| WATERSTRY SB 150-4-1 | WR3003380150-4-1 | 45,0 | DN150 | 656 820 |
| WATERSTRY SB 150-5-2 | WR3003380150-5-2 | 55,0 | DN150 | 801 570 |
| WATERSTRY SB 150-6 | WR3003380150-6 | 75,0 | DN150 | 974 500 |
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