Umuyoboro wa Vacuum uhendutse
Ibicuruzwa Bigufi Ibisobanuro:
- Umuyoboro uhenze wa vacuum wapanze kugirango ugenzure neza ubushyuhe
- Yakozwe ninganda zacu zizewe
- Yongera ingufu kandi ikagabanya gutakaza ubushyuhe mu nganda zitandukanye
Ibisobanuro birambuye ku bicuruzwa:
- Ubushobozi bwo Kugenzura Ubushyuhe Bwiza: Urutonde rwacu rwa Vacuum ruhendutse rutanga igisubizo cyiza kandi cyiza cyo gukomeza ubushyuhe bwiza mubisabwa bitandukanye. Iyi miyoboro yashizweho kugirango igabanye ubushyuhe mu gihe cyo kohereza amazi ashyushye cyangwa akonje, itume ingufu zikoreshwa neza ndetse no kuzigama amafaranga mu nganda nko gutunganya imiti, ibiribwa n'ibinyobwa, peteroli na gaze, n'ibindi.
- Amashanyarazi yizewe yizewe: Hamwe nubuhanga bwabo buhanitse bwogukoresha insimburangingo, imiyoboro yacu ihendutse ya Vacuum itanga imiyoboro ihanitse. Kubaka inkuta ebyiri, bigizwe n'umuyoboro w'imbere n'inyuma, ukora icyumba cya vacuum kibuza ihererekanyabubasha. Iyi insulasiyo igabanya neza gutakaza ubushyuhe, bigatuma ubushyuhe bwifuzwa bugumaho mugihe cyose cyo gutwara ibintu.
- Ubwubatsi burambye no kuramba: Twishimiye ubwiza nigihe kirekire cyibicuruzwa byacu. Imiyoboro yacu ya Vacuum ihendutse yubatswe kugirango ihangane n’imiterere mibi no kurwanya ruswa, bigatuma iba nziza mu nganda. Ubwubatsi bukomeye nibikoresho byujuje ubuziranenge bitanga imikorere irambye, byemeza igisubizo cyizewe kandi cyigiciro cyinshi kubikenewe byo kugenzura ubushyuhe.
- Kongera ingufu zingirakamaro: Gushora mumashanyarazi yacu ahendutse ya Vacuum Yagizwe Umuyoboro uragufasha kugabanya cyane gukoresha ingufu. Mugabanye gutakaza ubushyuhe mugihe cyo gutwara amazi, iyi miyoboro ifasha kunoza imikorere yingufu, bigatuma ibiciro bikora. Ibi bituma bahitamo kuramba bitagirira akamaro umurongo wawe wo hasi gusa ahubwo binagabanya ikirenge cyawe.
- Ibisubizo byihariye: Twumva ko buri nganda nibisabwa bifite ibisabwa byihariye. Imiyoboro yacu ya Vacuum ihendutse irashobora guhindurwa kugirango uhuze ibyo ukeneye. Byaba ari ukugaragaza uburebure bwa insulasiyo, guhitamo ibikoresho, cyangwa ibipimo by'imiyoboro, itsinda ryacu rizakorana cyane nawe kugirango utange igisubizo kiboneye cyerekana neza imikorere.
Kuzamura ubushyuhe bwawe bwo kugenzura ubushyuhe hamwe na Vacuum ihendutse kandi ikora neza. Yakozwe ninganda zacu zizwi, imiyoboro yacu itanga ibikoresho byiza byo kubika ubushyuhe bwumuriro, bigatuma ubushyuhe bugabanuka kandi bikongerera ingufu ingufu. Wungukire kubikorwa byabo biramba, kuramba, no guhitamo. Twandikire uyu munsi kugirango tuganire kubyo usabwa kandi ushake igisubizo cyiza cyo kugabanya ubushyuhe mu nganda zawe.
Video
Umuyoboro wa Vacuum
Umuyoboro wa Vacuum (VI Piping), aribyo Umuyoboro wa Vacuum Jacketed (VJ Piping), nk'umusemburo mwiza usimbuza imiyoboro isanzwe. Ugereranije no gukwirakwiza imiyoboro isanzwe, agaciro k'ubushyuhe bwa VIP ni inshuro 0,05 ~ 0.035 gusa yo gukwirakwiza imiyoboro isanzwe. Bika neza kuzigama ingufu nigiciro kubakiriya.
Ibicuruzwa bikurikirana bya Vacuum Jacketed Pipe, Vacuum Jacketed Hose, Vacuum Jacketed Valve, na Phase Separator muri Sosiyete ya HL Cryogenic ibikoresho, byanyuze muburyo butandukanye bwo kuvura tekinike, bikoreshwa muguhana ogisijeni y'amazi, azote yuzuye, argon y'amazi, hydrogène y'amazi, helium y'amazi, LEG na LNG, kandi ibyo bicuruzwa bikoreshwa mubikoresho bya kirogenike (urugero: tanki ya cryogenic, dewars na bokisi ikonje nibindi) mubikorwa byo gutandukanya ikirere, gaze, indege, electronike, superconductor, chip, guteranya ibyuma, ibiryo & ibinyobwa, farumasi, ibitaro, biobank, reberi, ibikoresho bishya bikora inganda zikora imiti, ibyuma & ibyuma, nubushakashatsi bwa siyansi nibindi.
Ubwoko butatu bwo guhuza imiyoboro ya VI
Ubwoko butatu bwo guhuza hano bukurikizwa gusa kumyanya ihuza imiyoboro ya VI. Iyo umuyoboro wa VI uhuza nibikoresho, ikigega cyo kubika nibindi, guhuza guhuza birashobora gutegurwa ukurikije ibyo abakiriya bakeneye.
Mu rwego rwo kurushaho gukenera abakiriya batandukanye, Umuyoboro wa Vacuum wateje imbere ubwoko butatu bwo guhuza, aribwo Ubwoko bwa Vacuum Bayonet Bwihuza na Clamps, Ubwoko bwa Vacuum Bayonet Ubwoko bwa Flanges na Bolts hamwe nubwoko bwa Welded. Bafite ibyiza bitandukanye kandi birakwiriye mubikorwa bitandukanye.
Igipimo cyo gusaba
Vacuum Bayonet Ihuza Ubwoko hamwe na Clamps | Vacuum Bayonet Ihuza Ubwoko hamwe na Flanges na Bolts | Ubwoko bwo guhuza ubwoko | |
Ubwoko bwihuza | Clamps | Flanges na Bolts | Weld |
Ubwoko bw'Ingingo ku ngingo | Vacuum | Vacuum | Perlite cyangwa Vacuum |
Ku rubuga | No | No | Nibyo, perlite yuzuye cyangwa vacuum pompe ivuye mumaboko yiziritse ku ngingo. |
Nominal Diameter yumuyoboro wimbere | DN10 (3/8 ") ~ DN25 (1") | DN10 (3/8 ") ~ DN80 (3") | DN10 (3/8 ") ~ DN500 (20") |
Igishushanyo | ≤8 bar | ≤16 bar | ≤64 bar |
Kwinjiza | Biroroshye | Biroroshye | Weld |
Gushushanya Ubushyuhe | -196 ℃ ~ 90 ℃ (LH2 & LHe : -270 ℃ ~ 90 ℃) | ||
Uburebure | Metero 1 ~ 8.2 / pc | ||
Ibikoresho | 300 Urukurikirane rw'icyuma | ||
Hagati | LN2, LOX, LAr, LHe, LH2, LEG, LNG |
Ibicuruzwa bitangwa
Ibicuruzwa | Ibisobanuro | Vacuum Bayonet Ihuza na Clamps | Vacuum Bayonet Ihuza na Flanges na Bolts | Kwihuza |
Umuyoboro wa Vacuum | DN8 | Yego | Yego | Yego |
DN15 | Yego | Yego | Yego | |
DN20 | Yego | Yego | Yego | |
DN25 | Yego | Yego | Yego | |
DN32 | / | Yego | Yego | |
DN40 | / | Yego | Yego | |
DN50 | / | Yego | Yego | |
DN65 | / | Yego | Yego | |
DN80 | / | Yego | Yego | |
DN100 | / | / | Yego | |
DN125 | / | / | Yego | |
DN150 | / | / | Yego | |
DN200 | / | / | Yego | |
DN250 | / | / | Yego | |
DN300 | / | / | Yego | |
DN400 | / | / | Yego | |
DN500 | / | / | Yego |
Ibiranga tekiniki
Igishushanyo Cy'indishyi | ≥4.0MPa |
Gushushanya Ubushyuhe | -196C ~ 90 ℃ (LH2& LHe : -270 ~ 90 ℃) |
Ubushyuhe bwibidukikije | -50 ~ 90 ℃ |
Igipimo cyo Kumeneka | ≤1 * 10-10Pa*m3/S |
Urwego rwa Vacuum nyuma ya garanti | ≤0.1 Pa |
Uburyo bwakorewe | Ikirere Cyinshi Cyinshi. |
Adsorbent na Getter | Yego |
NDE | Ikizamini cya Radiyo 100% |
Umuvuduko w'ikizamini | 1.15 Ibihe Byashushanyije |
Hagati | LO2LN2LAr 、 LH2、 LHe 、 LEG 、 LNG |
Sisitemu ya Dynamic na Static Vacuum Yashizwe Kumurongo
Sisitemu yo kuvoma Vacuum (VI) irashobora kugabanywa muri Dynamic na Static VI Piping Sisitemu.
lImiyoboro ya Static VI yuzuye yuzuye muruganda rukora.
lUmuyoboro wa Dynamic VI utangwa na vacuum itajegajega hamwe nogukomeza kuvoma sisitemu ya pompe ya vacuum kurubuga, naho ibindi byose byo guterana no kuvura biracyari muruganda rukora.
Dynamic Vacuum Yashizwemo Sisitemu | Sisitemu ya Vacuum Ihagaze | |
Intangiriro | Urwego rwa vacuum rwumwanya wa vacuum rukurikiranwa ubudahwema, kandi pompe vacuum ihita igenzurwa kugirango ifungure kandi ifunge, kugirango habeho ituze ningirakamaro kurwego rwa vacuum. | VJPs irangiza imirimo yo kubika vacuum muruganda rukora. |
Ibyiza | Kugumana vacuum birahamye, ahanini bikuraho kubungabunga vacuum mumirimo iri imbere. | Ishoramari ryinshi ryubukungu kandi ryoroshye kurubuga |
Vacuum Bayonet Ihuza Ubwoko hamwe na Clamps | Bikurikizwa | Bikurikizwa |
Vacuum Bayonet Ihuza Ubwoko hamwe na Flanges na Bolts | Bikurikizwa | Bikurikizwa |
Ubwoko bwo guhuza ubwoko | Bikurikizwa | Bikurikizwa |
Dynamic Vacuum Yashizwemo Sisitemu: Igizwe na Vacuum Yashizwemo Imiyoboro, Jumper Hoses na Sisitemu ya Vacuum (harimo pompe ya vacuum, valve solenoid na gage ya vacuum).
Ibisobanuro na Model
HL-PX-X-000-00-X
Ikirango
HL Ibikoresho bya Cryogenic
Ibisobanuro
PD: Umuyoboro wa VI
PS: Umuyoboro wa VI uhagaze
Ubwoko bwihuza
W: Ubwoko bwo gusudira
B: Ubwoko bwa Vacuum Bayonet hamwe na Clamps
F: Ubwoko bwa Vacuum Bayonet hamwe na Flanges na Bolts
Nominal Diameter yumuyoboro wimbere
010: DN10
…
080: DN80
…
500: DN500
Igishushanyo
08: 8bar
16: 16bar
25: 25bar
32: 32bar
40: 40bar
Ibikoresho by'umuyoboro w'imbere
Igisubizo: SS304
B: SS304L
C: SS316
D: SS316L
E: Ibindi
Sisitemu ya Vacuum Ihagaze
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPSB01008X | Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Clamps ya Sisitemu ya Vacuum Ihagaritswe | DN10, 3/8 " | 8 bar
| 300 Urukurikirane rw'icyuma | ASME B31.3 | X: Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPSB01508X | DN15, 1/2 " | |||||
HLPSB02008X | DN20, 3/4 " | |||||
HLPSB02508X | DN25, 1 " |
Nominal Diameter yumuyoboro wimbere:Basabwe ≤ DN25 cyangwa 1 ". Cyangwa ugahitamo Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Flanges na Bolts (kuva DN10, 3/8" kugeza DN80, 3 "), Ubwoko bwa Welded Ubwoko bwa VIP (kuva DN10, 3/8" kugeza DN500, 20 " )
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Igitutu cyo Gushushanya: Basabwe ≤ 8 bar. Cyangwa ugahitamo Ubwoko bwa Vacuum Bayonet hamwe na Flanges na Bolts (bar16 bar), Ubwoko bwo guhuza Welded (bar 64)
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPSF01000X | Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Flanges na Bolts kuri sisitemu ya Vacuum Ihagaritse Sisitemu | DN10, 3/8 " | 8 ~ 16 bar | 300 Urukurikirane rw'icyuma | ASME B31.3 | 00: Igishushanyo. 08 ni 8bar, 16 ni 16bar.
X: Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPSF01500X | DN15, 1/2 " | |||||
HLPSF02000X | DN20, 3/4 " | |||||
HLPSF02500X | DN25, 1 " | |||||
HLPSF03200X | DN32, 1-1 / 4 " | |||||
HLPSF04000X | DN40, 1-1 / 2 " | |||||
HLPSF05000X | DN50, 2 " | |||||
HLPSF06500X | DN65, 2-1 / 2 " | |||||
HLPSF08000X | DN80, 3 " |
Nominal Diameter yumuyoboro wimbere:Basabwe ≤ DN80 cyangwa 3 ". Cyangwa ugahitamo Ubwoko bwo guhuza Welded (kuva DN10, 3/8" kugeza DN500, 20 "), Ubwoko bwa Vacuum Bayonet hamwe na Clamps (kuva DN10, 3/8" kugeza DN25, 1 ").
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Igitutu cyo Gushushanya: Basabwe ≤ 16 bar. Cyangwa hitamo Ubwoko bwa Welded Ubwoko (bar 64 bar).
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPSW01000X | Ubwoko bwa Welded Ubwoko bwa Static Vacuum Yashizwemo Sisitemu | DN10, 3/8 " | 8 ~ 64 bar | 300 Urukurikirane rw'icyuma | ASME B31.3 | 00: Igishushanyo 08 ni 8bar, 16 ni 16bar, na 25, 32, 40, 64.
X: Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPSW01500X | DN15, 1/2 " | |||||
HLPSW02000X | DN20, 3/4 " | |||||
HLPSW02500X | DN25, 1 " | |||||
HLPSW03200X | DN32, 1-1 / 4 " | |||||
HLPSW04000X | DN40, 1-1 / 2 " | |||||
HLPSW05000X | DN50, 2 " | |||||
HLPSW06500X | DN65, 2-1 / 2 " | |||||
HLPSW08000X | DN80, 3 " | |||||
HLPSW10000X | DN100, 4 " | |||||
HLPSW12500X | DN125, 5 " | |||||
HLPSW15000X | DN150, 6 " | |||||
HLPSW20000X | DN200, 8 " | |||||
HLPSW25000X | DN250, 10 " | |||||
HLPSW30000X | DN300, 12 " | |||||
HLPSW35000X | DN350, 14 " | |||||
HLPSW40000X | DN400, 16 " | |||||
HLPSW45000X | DN450, 18 " | |||||
HLPSW50000X | DN500, 20 " |
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Dynamic Vacuum Yashizwemo Sisitemu
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPDB01008X | Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Clamps ya Sisitemu ya Vacuum Ihagaritswe | DN10, 3/8 " | 8 bar | 300 Urukurikirane rw'icyuma | ASME B31.3 | X:Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPDB01508X | DN15, 1/2 " | |||||
HLPDB02008X | DN20, 3/4 " | |||||
HLPDB02508X | DN25, 1 " |
Nominal Diameter yumuyoboro wimbere:Basabwe ≤ DN25 cyangwa 1 ". Cyangwa ugahitamo Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Flanges na Bolts (kuva DN10, 3/8" kugeza DN80, 3 "), Ubwoko bwa Welded Ubwoko bwa VIP (kuva DN10, 3/8" kugeza DN500, 20 " )
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Igitutu cyo Gushushanya: Basabwe ≤ 8 bar. Cyangwa ugahitamo Ubwoko bwa Vacuum Bayonet hamwe na Flanges na Bolts (bar16 bar), Ubwoko bwo guhuza Welded (bar 64)
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Imiterere y'imbaraga:Urubuga rukeneye gutanga amashanyarazi kuri pompe vacuum no kumenyesha ibikoresho bya HL Cryogenic ibikoresho byamashanyarazi byaho (Voltage na Hertz)
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPDF01000X | Ubwoko bwa Vacuum Bayonet Ihuza hamwe na Flanges na Bolts kuri sisitemu ya Vacuum Ihagaritse Sisitemu | DN10, 3/8 " | 8 ~ 16 bar | 300 Urukurikirane rw'icyuma | ASME B31.3 | 00: Igishushanyo. 08 ni 8bar, 16 ni 16bar.
X: Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPDF01500X | DN15, 1/2 " | |||||
HLPDF02000X | DN20, 3/4 " | |||||
HLPDF02500X | DN25, 1 " | |||||
HLPDF03200X | DN32, 1-1 / 4 " | |||||
HLPDF04000X | DN40, 1-1 / 2 " | |||||
HLPDF05000X | DN50, 2 " | |||||
HLPDF06500X | DN65, 2-1 / 2 " | |||||
HLPDF08000X | DN80, 3 " |
Nominal Diameter yumuyoboro wimbere:Basabwe ≤ DN80 cyangwa 3 ". Cyangwa ugahitamo Ubwoko bwo guhuza Welded (kuva DN10, 3/8" kugeza DN500, 20 "), Ubwoko bwa Vacuum Bayonet hamwe na Clamps (kuva DN10, 3/8" kugeza DN25, 1 ").
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Igitutu cyo Gushushanya: Basabwe ≤ 16 bar. Cyangwa hitamo Ubwoko bwa Welded Ubwoko (bar 64 bar).
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Imiterere y'imbaraga:Urubuga rukeneye gutanga amashanyarazi kuri pompe vacuum no kumenyesha ibikoresho bya HL Cryogenic ibikoresho byamashanyarazi byaho (Voltage na Hertz)
Mimpumuro nziza | KwihuzaAndika | Nominal Diameter yumuyoboro wimbere | Igishushanyo | IbikoreshoUmuyoboro w'imbere | Bisanzwe | Ongera wibuke |
HLPDW01000X | Ubwoko bwa Welded Ubwoko bwa Dynamic Vacuum Yashizwemo Sisitemu | DN10, 3/8 " | 8 ~ 64 bar | Ibyuma bitagira umwanda 304, 304L, 316, 316L | ASME B31.3 | 00: Igishushanyo 08 ni 8bar, 16 ni 16bar, na 25, 32, 40, 64. .
X: Ibikoresho by'umuyoboro w'imbere. A ni 304, B ni 304L, C ni 316, D ni 316L, E ni bindi. |
HLPDW01500X | DN15, 1/2 " | |||||
HLPDW02000X | DN20, 3/4 " | |||||
HLPDW02500X | DN25, 1 " | |||||
HLPDW03200X | DN32, 1-1 / 4 " | |||||
HLPDW04000X | DN40, 1-1 / 2 " | |||||
HLPDW05000X | DN50, 2 " | |||||
HLPDW06500X | DN65, 2-1 / 2 " | |||||
HLPDW08000X | DN80, 3 " | |||||
HLPDW10000X | DN100, 4 " | |||||
HLPDW12500X | DN125, 5 " | |||||
HLPDW15000X | DN150, 6 " | |||||
HLPDW20000X | DN200, 8 " | |||||
HLPDW25000X | DN250, 10 " | |||||
HLPDW30000X | DN300, 12 " | |||||
HLPDW35000X | DN350, 14 " | |||||
HLPDW40000X | DN400, 16 " | |||||
HLPDW45000X | DN450, 18 " | |||||
HLPDW50000X | DN500, 20 " |
Nominal Diameter yumuyoboro wo hanze:Byasabwe na Enterprises ya Enterineti ya HL Cryogenic ibikoresho. Irashobora kandi kubyazwa umusaruro ukurikije ibyo umukiriya asabwa.
Ibikoresho by'umuyoboro wo hanze: Hatariho ibisabwa bidasanzwe, ibikoresho byumuyoboro wimbere nu muyoboro wo hanze bizatoranywa kimwe.
Imiterere y'imbaraga:Urubuga rukeneye gutanga amashanyarazi kuri pompe vacuum no kumenyesha ibikoresho bya HL Cryogenic ibikoresho byamashanyarazi byaho (Voltage na Hertz)