Tshawb xyuas cov khoom sib xyaw
Cov alloy muaj pes tsawg leeg yog lub hauv paus ntawm qhov zoo. Brass yog tooj liab-zinc alloy, thiab qhov piv txiav txim siab ua haujlwm. Tus qauv kav dej tooj dag (CuZn37) muaj kwv yees li 63% tooj liab thiab 37% zinc. Fittings nrog cov ntsiab lus tooj liab siab dua (85% lossis ntau dua) muab kev tiv thaiv corrosion zoo dua rau cov dej hiav txwv lossis kev ua phem. Nco ntsoov nug tus neeg muag khoom rau cov ntaub ntawv xeem cov ntaub ntawv txheeb xyuas qhov muaj pes tsawg leeg.
Txheeb xyuas Lead -Daim ntawv pov thawj pub dawb rau haus dej
Rau cov dej siv dej, qhov no yog qhov yuav tsum tau ua. Cov kev cai niaj hnub xav tau cov ntsiab lus txhuas hauv qab 0.25% (NSF/ANSI 372). Qee cov khoom siv hwm zoo siv CW511L tooj dag nrog cov hlau lead hauv qab 0.1%. Nrhiav cov cim xws li "NSF/ANSI 61" lossis "WRAS" ntawm qhov haum lossis ntim. Tsis txhob xav tias tag nrho cov tooj dag fittings yog txhuas- nyab xeeb; ib txwm txheeb xyuas daim ntawv pov thawj.
Txheeb xyuas qhov ntsuas qhov ntsuas siab thiab xov xov
Txhua qhov kev haum zoo qhia nws qhov ntsuas siab (PN10, PN16, PN20, PN25). Xyuas kom meej tias qhov ntsuas tau raws li koj qhov kev ua haujlwm siab tshaj plaws. Cov qauv xov yog qhov tseem ceeb sib npaug. Xyuas seb qhov haum siv BSP (British), NPT (Asmeskas), lossis Metric threads . Cov xov tsis sib xws yuav xau, tsis hais cov khoom zoo.
Tshawb xyuas qhov Nto Finish Visually
Kev kuaj pom pom qhia ntau txog kev tsim khoom zoo. Authentic tooj dag muaj qhov sov so, golden xim nrog ib tug du, txawm tiav. Tsis txhob fittings nrog pitting, ntxhib thaj ua rau thaj, xim tsis sib xws, lossis ntse burrs ntawm cov npoo. Rau plated fittings (chrome los yog npib tsib xee), xyuas kom cov txheej yog zoo ib yam thiab tsis muaj flaking. Lub siab - qhov chaw zoo qhia tau meej kev tsim khoom.
Ntsuam xyuas Dimensional Accuracy thiab Phab Ntsa Thickness
Siv lub caliper los xyuas qhov loj me. Ntsuas qhov sab nraud, sab hauv txoj kab uas hla, thiab xov suab. Sib piv cov no rau cov kev qhia tshwj xeeb. Phab ntsa thickness yuav tsum muaj ntau (feem ntau 2 hli los yog ntau tshaj rau cov kav dej txheem) kom tiv thaiv deformation nyob rau hauv siab. Dimensional tolerances yuav tsum nyob rau hauv ± 0.2mm rau qhov tob tob.
Nrhiav Cov Ntawv Pov Thawj Ua Haujlwm
Reputable manufacturers ua raws li cov qauv thoob ntiaj teb. Cov ntawv pov thawj tseem ceeb suav nrog ASTM B16 (US), EN 1254 (EU), ISO 228 (xov), thiab ASME B1.20.1 (NPT). Cov no xyuas kom haum raws li cov qauv tsim thiab kev nyab xeeb. Cov neeg muab khoom yuav tsum muab cov ntaub ntawv raws li qhov kev thov.
Nkag siab Forged vs. Cast Quality
Forged tooj dag fittings yog superior rau siab - kev siv siab . Cov txheej txheem forging compresses thiab aligns cov qauv nplej, tshem tawm cov voids thiab tsim kom muaj denser, cov khoom muaj zog. Cam khwb cia fittings yog kev lag luam ntau dua tab sis yuav muaj cov porosity sab hauv. Rau cov txheej txheem tseem ceeb, qhia kom meej forged fittings thiab xyuas qhov no nrog tus neeg muag khoom.
Thov kev kuaj ua ntej ua ntej yuav khoom ntau
Ua ntej cog lus rau kev txiav txim loj, thov cov qauv. Ua koj tus kheej cov kev kuaj xyuas yooj yim: ntsuas qhov ntev, tshuaj xyuas qhov chaw, thiab ntsuas qhov haum nrog cov khoom sib txuas. Rau cov ntawv thov kev tshaj lij, xav txog kev xa cov qauv mus rau qhov thib peb -chaw kuaj mob rau kev txheeb xyuas qhov sib xyaw. Qhov kev nqis peev me me no tiv thaiv kev poob qis.
Tshawb xyuas tshuaj lom neeg thiab corrosion kuj
Yog tias qhov haum yuav nqa dej nruj los yog siv sab nraum zoov, nug cov ntaub ntawv kuaj corrosion. Cov tuam txhab lag luam muaj koob npe ua cov tshuaj ntsev tshuaj tsuag thiab kev sim rau hauv dej kom simulate ib puag ncig hnyav. Rau marine lossis chloride- daim ntawv thov nplua nuj, qhia meej dezincification-resistant (DZR) tooj dag alloys .
Txheeb xyuas qhov tsis xws luag nrog kev sim yooj yim
Cov khoom siv tau zoo dhau los tsis yog -kev kuaj kev puas tsuaj rau cov kab nrib pleb lossis porosity . Rau kev yuav khoom tseem ceeb, nug txog eddy tam sim no kuaj lossis ultrasonic tsis pom kev. Thaum koj tsis tuaj yeem ua cov kev xeem no hauv lub khw, nug qhia koj qhov hnyav thiab yuav ua rau tus neeg muag khoom muab cov ntaub ntawv pov thawj.
Kev ntsuas ntsuas siab yog qhov tseem ceeb
Txhua qhov haum yuav tsum muaj peev xwm tiv taus kev ntsuas hydrostatic lossis pneumatic siab. Cov neeg muag khoom yuav tsum muab cov ntaub ntawv qhia tias lawv cov khoom siv tau raug sim rau cov qauv tsim nyog (xws li ISO 5208 lossis EN 12266). Qhov no tsis yog - sib tham tau rau cov pa roj lossis siab - cov tshuab dej siab.
Kev Tshawb Fawb Cov Khoom Siv Lub Npe thiab Tom Qab -Kev Pabcuam Muag
Thaum kawg, xaiv tus neeg muag khoom nrog cov ntaub ntawv teev tseg. Saib rau cov tuam txhab lag luam uas muaj kev tswj xyuas zoo, lub sij hawm teb ceev ceev, thiab cov neeg siv khoom zoo. Cov neeg muag khoom ntseeg tau muab cov ntawv pov thawj traceable batch thiab sawv tom qab lawv cov khoom.
