Koj xav tau lub qhov dej rau cov kab tshuaj, tab sis PVC txheem tsis yog ib qho kev xaiv. Kev xaiv cov khoom tsis raug yuav ua rau muaj kev xau, kev nchuav txaus ntshai, thiab kev puas tsuaj loj rau koj lub cev tag nrho.

Lub pob valve PP yog lub valve kaw uas ua los ntawm polypropylene, ib hom thermoplastic polymer. Nws yog xaiv tshwj xeeb rau nws txoj kev tiv taus ntau yam acids, bases, thiab cov tshuaj solvents, tshwj xeeb tshaj yog qhov twg PVC yuav ua tsis tau zoo.

Thaum kuv tham nrog kuv cov neeg koom tes zoo li Budi hauv Indonesia, kev sib tham feem ntau mus dhau qhov kev siv dej ib txwm muaj. Ntau tus ntawm nws cov neeg siv khoom ua haujlwm hauv kev lag luam xws li kev ua tshuaj lom neeg lossis kev kho dej, qhov twg cov kua dej muaj zog dua li dej dawb. Rau cov haujlwm no, tsuas yog siv tus qauvPVC lub qhov dejtsis txaus. Koj xav tau cov khoom siv uas ua los rau kev ua haujlwm hnyav yam tsis muaj kev puas tsuaj. Cov khoom siv ntawd feem ntau yog polypropylene, lossis PP. Nws muab kev nyab xeeb thiab kev ntseeg siab rau cov kev siv hauv kev lag luam tseem ceeb no.

Daim ntawv tag nrho ntawm PP hauv cov li qub yog dab tsi?

Koj pom "PP" teev nyob rau hauv daim ntawv teev khoom tab sis tsis paub meej tias nws sawv cev rau dab tsi. Qhov no ua rau nws nyuaj rau nrhiav nws cov khoom lossis piav qhia nws cov txiaj ntsig rau koj cov neeg siv khoom nrog kev ntseeg siab.

Cov ntaub ntawv tag nrho ntawm PP hauv cov li qub yog Polypropylene. Nws yog ib qho thermoplastic uas ruaj khov thiab sib dua uas yog ib feem ntawm tib tsev neeg ntawm cov yas li PVC (Polyvinyl Chloride) thiab PE (Polyethylene).

Polypropylene yog ib qho ntawm cov yas uas siv tau ntau yam tshaj plaws hauv ntiaj teb. Nws yog cov khoom siv ua haujlwm siv rau txhua yam los ntawm cov khoom siv hauv tsheb mus rau cov khoom siv hauv chaw kuaj mob vim nws cov yam ntxwv tshwj xeeb. Hauv ntiaj teb ntawm cov li qub thiab cov kav dej, nws cov txiaj ntsig tseem ceeb yog nws qhov zoo kawg nkauskev tiv thaiv tshuaj lom neegTsis zoo li PVC, nws tuaj yeem ua tau ntau yam kua qaub, alkalis, thiab cov organic solvents yam tsis muaj kev puas tsuaj. Qhov no yog vim li cas peb ntawm Pntek muaj cov kab tshwj xeeb ntawmPP li qubPeb paub tias rau qee yam haujlwm hauv kev lag luam, tsis muaj ib yam dab tsi hloov tau. Kev nkag siab tias "PP" txhais tau tias polypropylene yog thawj kauj ruam los xaiv lub valve zoo rau kev siv tshuaj lom neeg nyuaj.

Polypropylene (PP) vs. Polyvinyl Chloride (PVC)

Vaj tse	Polypropylene (PP)	Polyvinyl Chloride (PVC)
Lub Npe Khoom Siv	Polypropylene	Polyvinyl Chloride
Kev Siv Tseem Ceeb	Kev lag luam tshuaj lom neeg, chaw kuaj mob, electroplating, kev siv rau hauv kev lag luam.	Kev thauj mus los hauv dej, kev ywg dej, cov kav dej hauv tsev, cov pas dej ua ke.
Kev Tiv Thaiv Tshuaj	Zoo heev; tshwj xeeb tshaj yog tiv thaiv cov kua qaub, cov hauv paus, thiab cov kuab tshuaj.	Zoo; tab sis tsis muaj zog rau qee cov kuab tshuaj thiab cov tshuaj chlorine.
Kev Txwv Kub	Siab dua; feem ntau tuaj yeem tswj cov kua dej txog li 80-90 ° C (175-195 ° F).	Qis dua; feem ntau txwv rau 60°C (140°F).
Txoj Kev Sib Txuas	Kev sib xyaw ua ke kub (welding) yog ib qho uas pom ntau, kuj muaj nrog cov qhov (sockets/threads)	Cov cement solvent (gluing) rau cov qhov (socket) kawg, xov.

Lub pob PP yog dab tsi?

Koj pom ib lub valve nrog lub cev PVC tab sis lub pob PP. Cov khoom sib xyaw ua ke no zoo li txawv txawv, thiab koj xav tsis thoob tias nws puas yog kev txiav nqi lossis ib qho feature nrog lub hom phiaj tiag tiag.

Lub pob PP yog lub pob uas tig tau sab hauv lub valve ua los ntawm polypropylene. Kev siv lub pob PP sab hauv lub valve PVC yog ib qho kev xaiv tsim qauv zoo uas txhim kho kev tiv thaiv tshuaj lom neeg rau lub plawv ntawm lub valve thaum tseem tswj tus nqi kom qis.

Qhov no yog ib qho lus sib tham uas txhua tus neeg tham txog. Lub pob thiab lub rooj zaum yog cov khoom ntawm lub valve uas ib txwm sib cuag nrog cov kua dej, txawm tias thaum lub valve kaw lawm los xij. Lawv hu ua "cov khoom ntub dej"Lub cev valve, ntawm qhov tod tes, tsuas yog raug nthuav tawm thaum lub valve qhib. Rau cov ntawv thov nrog cov kua dej uas muaj zog me ntsis, koj yuav tsis xav tau tag nrho lub cev valve ua los ntawm cov khoom kim heev, qib siab. Los ntawm kev siv apob PP uas tiv taus tshuaj lom neegsab hauv lub cev PVC txheem, peb tsim ib qho pheej yiglub valveuas tseem muab kev tiv thaiv zoo dua qhov twg nws tseem ceeb tshaj plaws. Nws yog hais txog kev muab kev daws teeb meem uas tsom mus rau qhov sib npaug ntawm kev ua tau zoo thiab kev siv nyiaj rau peb cov neeg koom tes cov kev xav tau tshwj xeeb.

Qhov ntsuas siab ntawm PP pob valve yog dab tsi?

Koj paub tias PP zoo rau cov tshuaj lom neeg, tab sis nws puas tuaj yeem tswj tau qhov siab? Kev siv lub valve uas tsis tau ntsuas zoo yog qhov txaus ntshai heev uas tuaj yeem ua rau lub kaw lus tawg thiab cov tshuaj lom neeg nchuav.

Qhov ntsuas siab rau Pntek's PP pob valves yog PN16, uas yog 16 bar lossis li 235 PSI ntawm chav tsev kub (20 ° C). Nws yog ib qho tseem ceeb kom nco ntsoov qhov ntsuas no txo ​​qis thaum cov kua dej kub nce ntxiv. Ib txwm xyuas daim ntawv qhia siab-kub ntawm lub chaw tsim khoom.

Peb liPP pob valventawm Pntek muaj qhov ntsuas PN16 ruaj khov. Qhov no txhais tau tias lawv tuaj yeem tswj tau 16 bar ntawm qhov siab, uas yog kwv yees li 235 PSI. Qhov ntsuas siab no yog lub cim ntawm kev lag luam zoo, tab sis nws tsis yog tag nrho zaj dab neeg. Qhov tseem ceeb tshaj plaws uas kuv piav qhia rau cov neeg koom tes zoo li Budi yog tias qhov ntsuas siab no yog khi ncaj qha rau qhov kub ntawm cov kua dej. Txhua yam thermoplastics, suav nrog polypropylene, tau softer thiab tsis khov kho thaum lawv kub dua. Thaum cov khoom mos, nws lub peev xwm los tswj qhov siab txo qis heev. Kev tsis quav ntsej qhov nkhaus 'derating' no tsis yog kev coj ua tsis zoo xwb; nws yog qhov txaus ntshai. Peb muab daim ntawv qhia meej nrog peb cov li qub kom tiv thaiv kev ua tsis tiav ntawm lub kaw lus thiab xyuas kom meej tias peb cov neeg siv khoom muaj kev nyab xeeb yog qhov tseem ceeb tshaj plaws.

Lub Luag Haujlwm Tseem Ceeb ntawm Kev Kub Derating

Kub ntawm cov kua dej	Siab Ua Haujlwm Siab Tshaj Plaws (PN16 Valve)
20°C (68°F)	16 bar (235 PSI)
60°C (140°F)	6.4 bar (94 PSI)
80°C (176°F)	3.2 bar (47 PSI)

Lus Cim: Qhov no yog ib qho piv txwv rau lub valve PN16. Ib txwm saib daim ntawv qhia txog Pntek kom paub meej cov lej.

Lub valve PP-H yog dab tsi?

Koj ntsib ntau hom PP sib txawv, xws li "PP-H." Koj tsis paub meej tias "-H" txhais li cas lossis yog tias nws yog cov khoom sib txawv koj yuav tsum txhawj txog thaum koj xaj khoom.

Lub qhov dej PP-H yog ua los ntawm Polypropylene Homopolymer. Qhov no yog ib qib tshwj xeeb, ruaj khov ntawm PP uas paub txog nws lub zog zoo heev, kev tawv, thiab kev ua haujlwm kub siab, ua rau nws zoo tagnrho rau cov qhov dej thiab cov khoom siv hauv kev lag luam.

Tsis yog txhua yam polypropylene yog tsim sib npaug. Tus "-H" sawv cev rau Homopolymer, uas txhais tau tias cov yas yog ua los ntawm tsuas yog ib hom monomer building block (propylene). Qhov no ua rau cov khoom siv uas muaj zog heev thiab tawv, uas yog qhov koj xav tau rau lub cev valve uas xav tau kev siab thiab tiv taus kev khoov. Muaj lwm hom, xws li copolymers (PP-B, PP-R), uas yog ua los ntawm kev ntxiv lwm monomer. Cov hom no muaj kev ywj pheej ntau dua lossis muaj lub zog cuam tshuam zoo dua ntawm qhov kub qis, ua rau lawv haum rau lwm yam, xws li cov kav dej uas xav tau kev khoov. Ntawm Pntek, peb xaiv PP-H rau peb cov valve kev lag luam vim nws qhov kev nruj thiab kev tiv taus cua sov muab kev ua tau zoo tshaj plaws thiab lub neej ua haujlwm ntev tshaj plaws.

Cov Hom Polypropylene Feem Ntau

Hom	Lub Npe Tag Nrho	Cov Khoom Tseem Ceeb	Cov Ntaub Ntawv Siv Zoo Tshaj Plaws
PP-H	Homopolymer	Kev ua kom tawv ncauj, lub zog, kev tiv taus cua sov thiab tshuaj lom neeg zoo heev.	Cov li qub, cov khoom siv kev lag luam, cov tso tsheb hlau luam tshuaj lom neeg.
PP-B	Cov tshuaj copolymer thaiv	Lub zog cuam tshuam siab, tshwj xeeb tshaj yog thaum kub tsawg.	Cov thawv roj teeb, cov khoom lag luam uas xav tau kev cuam tshuam ruaj khov.
PP-R	Cov tshuaj sib xyaw ua ke	Softer, ntau saj zawg zog, zoo ntev lub sijhawm tiv thaiv cua sov.	Cov kav dej kub thiab dej txias.

Xaus lus

A PP pob valveyog ib qho tseem ceeb rau kev siv cov tshuaj lom neeg kom muaj kev nyab xeeb. Los ntawm kev nkag siab txog nws cov khoom siv, kev txwv siab, thiab ntau qib xws li PP-H, koj tuaj yeem xaiv lub valve zoo rau cov haujlwm lag luam uas nyuaj.