1. Uma ingxenye yokuvala ixega, ukuvuza kwenzeka.

isizathu:

1. Ukusebenza ngendlela engafanele kubangela ukuthi izingxenye zokuvala zibhajwe noma zeqe indawo ephezulu efile, okuholela ekulimaleni nokuphuka koxhumano;

2. Ukuxhumana kwengxenye evalayo kuntekenteke, kuyaxega, futhi akuzinzile;

3. Impahla yesiqeshana sokuxhuma ayizange ikhethwe ngokucophelela, futhi ayikwazi ukubekezelela ukugqwala kwe-medium kanye nokugqoka komshini.

Isu lokunakekela

1. Ukuqinisekisa ukusebenza kahle, valai-valvengobumnene futhi uyivule ngaphandle kokuya ngaphezu kwendawo efile ephezulu. Isondo lesandla lidinga ukuguqulwa kancane emuva lapho i-valve isivulwe ngokugcwele;

2. Kufanele kube ne-backstop ekuxhumekeni kwentambo kanye nokuxhumana okuvikelekile phakathi kwesigaba sokuvala nesiqu se-valve;

3. Izixhumi zazivame ukuhlanganisa i-i-valveisiqu nesigaba sokuvala kufanele sikwazi ukubekezelela ukugqwala okuphakathi futhi sibe nezinga elithile lamandla emishini nokumelana nokugqoka.

2. Ukupakisha ukuvuza (ngaphandle kweukuvuza kwe-valve,ukuvuza kokupakisha kuphezulu kakhulu).

isizathu:

1. Ukukhetha ukupakisha okungalungile; ukusebenza kwe-valve emazingeni okushisa aphezulu noma aphansi; ukumelana nokugqwala okuphakathi; ukucindezela okuphezulu noma ukumelana ne-vacuum; 2. Ukufakwa kokupakisha okungalungile, okuhlanganisa amaphutha amancane kangako esikhundleni esikhulu, ukuxhuma okunganele kwamakhoyili asongekile, nangaphezulu okuqinile nangaphansi;

3. Isigcwalisi sesigugile, sesidlulile isikhathi sokusebenziseka kwaso, futhi asisakwazi nokuvumelana nezimo.

4. Ukunemba kwesiqu se-valve kuphansi, futhi kukhona amaphutha ahlanganisa ukugoba, ukugqwala, nokuguga.

5. Indlala ayicindezelwa ngokuqinile futhi awekho imibuthano yokupakisha eyanele.

6. Indlala, amabhawodi, nezinye izakhi zonakele, okwenza kungenzeki ukuphusha indlala ngokuqinile;

7. Ukusetshenziswa ngendlela engafanele, amandla angafanele, njll.;

8. Indlala igwegwile, futhi isikhala phakathi kwendlala nesiqu se-valve sifushane kakhulu noma sikhulu kakhulu, okubangela ukuthi isiqu se-valve siguge ngaphambi kwesikhathi futhi ukupakishwa kulinyazwe.

Isu lokunakekela

1. Impahla yokugcwalisa kanye nomusa kufanele kukhethwe ngokusekelwe ezimweni zokusebenza;

2. Faka ukupakisha ngendlela efanele ngokuhambisana nemithethonqubo esebenzayo. Ukuhlangana kufanele kube ku-30°C noma ku-45°C, futhi ucezu ngalunye lokupakisha kufanele lubekwe futhi luhlanganiswe ngakunye. 3. Ukupakishwa kufanele kushintshwe ngokushesha lapho ifinyelela ekupheleni kokusebenziseka kwayo, ubudala, noma yonakaliswa;

4. Isiqu se-valve esilimele kufanele sishintshwe ngokushesha ngemva kokugoba nokuguga; kufanele-ke iqondiswe futhi ilungiswe.

5. I-gland kufanele ibe negebe langaphambi kokuqina elingaphezu kuka-5mm, ukupakisha kufanele kufakwe kusetshenziswa inombolo enqunyiwe yokuphenduka, futhi indlala kufanele iqiniswe ngokulinganayo futhi ngokulinganayo.

6. Amabhawodi alimele, izindlala, nezinye izingxenye kufanele kulungiswe ngokushesha noma kushintshwe;

7. Imiyalo yokusebenza kufanele ilandelwe, isondo lesandla elinomthelela lisebenza ngamandla ajwayelekile kanye nesivinini esingaguquki;

8. Qinisa amabhawodi edlala ngokulinganayo nangokulinganayo. Isikhala esiphakathi kwendlala nesiqu se-valve kufanele sinwetshwe ngokufaneleyo uma sisincane kakhulu, noma kufanele sishintshwe uma sikhulu kakhulu.

3. Indawo yokuvala iyavuza

isizathu:

1. Indawo yokubeka uphawu ayikwazi ukwenza umugqa oseduze futhi ayiphansi;

2. Isikhungo esiphezulu se-valve esixhumene nesiqu kuya ekuvaleni asiqondile, sonakele, noma siyalengiswa;

3. Izingxenye zokuvala zisontekile noma zisuke phakathi nendawo ngenxa yokuthi isiqu se-valve sikhubazekile noma singakhiwe ngendlela engafanele;

4. I-valve ayikhethiwe ngokuhambisana nezimo zokusebenza noma ikhwalithi yempahla yokuvala uphawu ayikhethiwe kahle.

Isu lokunakekela

1. Khetha kahle uhlobo lwe-gasket nezinto ezibonakalayo ngokuhambisana nendawo yokusebenza;

2. Ukusetha ngokucophelela nokusebenza okulula;

3. Amabhawodi kumele aqiniswe ngokulinganayo futhi aqiniswe ngokulinganayo. I-wrench ye-torque kufanele isetshenziswe uma kudingeka. Amandla okuqinisa ngaphambili kufanele abe anele futhi angabi phezulu kakhulu noma aphansi kakhulu. Phakathi kwe-flange kanye nokuxhumeka kwentambo, kufanele kube negebe lokuqinisa ngaphambili;

4. Amandla kufanele afane futhi umhlangano we-gasket kufanele ugxile. Akuvunyelwe ukusebenzisa ama-gaskets aphindwe kabili kanye nokudlula ama-gaskets;

5. Indawo yokuvala emile icutshunguliwe futhi igqwalile, yonakele, futhi inekhwalithi ephansi yokucubungula. Ukuqinisekisa ukuthi indawo emile yokuvala ihambisana nemibandela edingekayo, ukulungiswa, ukugaya, nokuhlolwa kombala kufanele kwenziwe;

6. Qaphela ukuhlanzeka lapho ufaka i-gasket. Uphalafini kufanele usetshenziselwe ukuhlanza indawo yokuvala, futhi i-gasket akufanele iwele phansi.