CHV150-300
Kama majina yanavyoashiria, vali hii ina lango linalozunguka ambalo limebanwa juu na hufunguka wakati umajimaji unapita ndani yake. Njia laini ya mtiririko hutolewa na vali ya kuangalia swing wakati diski ya vali iko katika nafasi iliyo wazi kabisa. Ndani ya vali, njia hii laini hutoa mtikisiko mdogo na kupungua kwa shinikizo. Ili vali ifanye kazi kikamilifu, lazima kuwe na shinikizo la chini kabisa ili kufungua diski. Wakati mtiririko wa umajimaji unaporudi nyuma, shinikizo na uzito wa kati dhidi ya diski husukuma diski kwenye kiti, na hivyo kuzuia mtiririko wote wa kurudi nyuma. Vali za kuangalia kwa kawaida huchukuliwa kama vifaa vya usalama au kinga.
Valvu ya Kukagua Chuma cha Kutupwa ya Daraja la 150-300 ni vali ya kukagua iliyotengenezwa kwa chuma cha kutupwa. Imegawanywa katika darasa la 150 na darasa la 300 kulingana na darasa la shinikizo. Sifa zake ni pamoja na muundo rahisi, ukubwa mdogo, uzito mwepesi, utendaji mzuri wa kuziba, na uendeshaji rahisi. Vali hii inafaa kwa mazingira yenye shinikizo kubwa na halijoto ya juu ili kuzuia mtiririko wa maji kwenye mabomba kinyume. Kwa kawaida hutumika katika mifumo ya mabomba katika nyanja za viwanda kama vile mafuta, tasnia ya kemikali, na umeme.
Ni vali inayotumia uendeshaji wa mzunguko ili kudhibiti mtiririko wa maji. Kwa kawaida huwa na mwili wa vali, kifuniko cha vali, diski ya vali, shina la vali, na kifaa cha uendeshaji. Aina hii ya vali hufanikisha mtiririko wa kati ili kufungua au kufunga kwa kuzungusha diski ya vali, na ina utendaji mzuri wa kuziba, ambao unaweza kuzuia uvujaji wa kati kwa ufanisi.

| HAPANA. | SEHEMU | Nyenzo ya ASTM | ||||
| WCB | LCB | WC6 | CF8(M) | CF3(M) | ||
| 1 | MWILI | A216 WCB | A352 LCB | A217 WC6+STL | A351 CF8(M)+STL | A351 CF3(M)+STL |
| 2 | KITI | A105+13Cr | A105+13Cr | - | - | - |
| 3 | DISK | A216 WCB+13Cr | A352 LCB+13Cr | A217 WC6+STL | A351 CF8(M) | A351 CF3(M) |
| 4 | KIUNGO | A216 WCB | A182 F6 | A182 F6 | A351 CF8(M) | A351 CF3(M) |
| 5 | PIN YA HINGE | A276 304 | A182 F6 | A182 F6 | A182 F304(F316) | A182 F304(F316) |
| 6 | UMA | A216 WCB | A352 LCB | A217 WC6 | A351 CF8(M) | A351 CF3(M) |
| 7 | KIFUNIKO CHA KUFUNGA | A193 B7 | A320 L7 | A193 B16 | A193 B8(M) | A193 B8(M) |
| 8 | Njugu za Kufunika | A194 2H | A194 7 | A194 4 | A194 8(M) | A194 8(M) |
| 9 | GASKETI | SS304+GRAPHITE | PTFE/SS304+GRAFITI | PTFE/SS316+GRAFITI | ||
| 10 | JALADA | A216 WCB | A352 LCB | A217 WC6 | A351 CF8(M) | A351 CF3(M) |
| Ukubwa | in | 1/2 | 3/4 | 1 | 11/2 | 2 | 21/2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 26 |
| mm | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 650 | |
| L/L1 (RF/BW) | in | 4.25 | 4.62 | 5 | 6.5 | 8 | 8.5 | 9.5 | 11.5 | 14 | 19.5 | 24.5 | 27.5 | 31 | 34 | 38.5 | 38.5 | 51 | - |
| mm | 108 | 117 | 127 | 165 | 203 | 216 | 241 | 292 | 356 | 495 | 622 | 699 | 787 | 864 | 978 | 978 | 1295 | - | |
| L2 (RTJ) | in | - | - | - | - | 8.5 | 9 | 10 | 12 | 14.5 | 20 | 25 | 28 | 31.5 | 34.5 | 39 | 39 | 21.5 | - |
| mm | - | - | - | - | 216 | 229 | 254 | 305 | 368 | 508 | 635 | 711 | 800 | 876 | 991 | 991 | 1308 | - | |
| H (Wazi) | in | 3.12 | 3.38 | 3.88 | 4.38 | 6 | 6.5 | 6.88 | 8 | 11.5 | 13.88 | 15.38 | 17 | 18.75 | 20.62 | 22.88 | 24.62 | 24.75 | - |
| mm | 80 | 85 | 100 | 110 | 152 | 165 | 175 | 204 | 293 | 353 | 390 | 432 | 475 | 525 | 582 | 627 | 883 | - | |
| WT (Kilo) | BW | 2.5 | 3.5 | 5 | 7.5 | 14 | 20 | 25 | 40 | 71 | 118 | 177 | 263 | 353 | 542 | 632 | 855 | 970 | - |
| RF/RTJ | 2 | 3 | 3.5 | 5.5 | 10 | 12 | 17 | 29 | 57 | 96 | 143 | 227 | 295 | 468 | 552 | 755 | 831 | - |
Vipimo na Uzito Darasa la 150
| Ukubwa | in | 1/2 | 3/4 | 1 | 11/2 | 2 | 21/2 | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 | 26 |
| mm | 15 | 20 | 25 | 40 | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 650 | |
| L/L1 (RF/BW) | in | 6 | 7 | 8 | 9 | 10.5 | 11.5 | 12.5 | 14 | 17.5 | 21 | 24.5 | 28 | 33 | 34 | 38.5 | 40 | 53 | - |
| mm | 152 | 178 | 203 | 229 | 267 | 292 | 318 | 356 | 445 | 533 | 622 | 711 | 838 | 864 | 978 | 1016 | 1346 | - | |
| L2 (RTJ) | in | - | - | - | - | 11.12 | 12.12 | 13.12 | 14.62 | 18.12 | 21.62 | 25.12 | 28.62 | 33.62 | 34.62 | 39.12 | 40.75 | 53.88 | - |
| mm | - | - | - | - | 283 | 308 | 333 | 371 | 460 | 549 | 638 | 727 | 854 | 879 | 994 | 1035 | 1368 | - | |
| H (Wazi) | in | 3.12 | 3.38 | 3.88 | 4.38 | 6 | 6.5 | 6.88 | 8 | 11.5 | 13.88 | 15.38 | 17 | 18.75 | 20.62 | 22.88 | 24.62 | 34.75 | - |
| mm | 80 | 85 | 100 | 110 | 152 | 165 | 175 | 204 | 293 | 353 | 390 | 432 | 475 | 525 | 582 | 627 | 883 | - | |
| WT (Kilo) | BW | 3 | 4 | 6 | 10 | 16 | 23 | 29 | 46 | 82 | 136 | 204 | 302 | 405 | 625 | 730 | 985 | 1115 | - |
| RF/RTJ | 2.5 | 3.5 | 5 | 7 | 11 | 13 | 18 | 31 | 61 | 103 | 155 | 245 | 315 | 503 | 593 | 812 | 895 | - |