Ing materyales a pang-seal ning balbula metung yang importanting bage keng pamag-seal ning balbula. Nanu la reng materyales a pang-seal ning balbula? balu mi na ing valve sealing ring materials makadake ya keng adwang kategorya: metal ampo non-metal. Ing tutuki metung yang makuyad a pamagumpisa kareng kundisyun ning pamangamit kareng miyayaliwang materyales a pang-seal, ampo reng karaniwan a gagamitan a uri ning balbula.
1. Sintetikung goma
Ing komprehensibung katangian ning synthetic rubber antimo ing oil resistance, temperature resistance ampo corrosion resistance mas masanting la kesa kareng natural a goma. Keraklan, ing temperatura ning synthetic rubber t≤150°C ya, at ing temperatura ning natural a goma t≤60°C ya. Ing goma gagamitan de para isara ing globe valves,goma makalukluk keng gate valve, diaphragm valves,rubber seated butterfly valve, rubber seated swing check valve (check valves), pinch valves ampo reng aliwang valves a maki nominal pressure PN≤1MPa.
2. Nylon
Ing nylon atin yang katangian a malating friction coefficient ampo masanting a corrosion resistance. Ing nylon keraklan gagamitan de para kareng ball valves ampo globe valves a maki temperatura t≤90°C ampo nominal pressure PN≤32MPa.
3. PTFE
Ing PTFE keraklan gagamitan de para kareng globe valves,gate valves, ball valves, atbp. a maki temperatura t≤232°C ampo nominal pressure PN≤6.4MPa.
4. Cast iron
Ing cast iron gagamitan de para kenggate valve, globe valve, plug valve, atbp. para keng temperatura t≤100°C, nominal pressure PN≤1.6MPa, gas ampo oil.
5. Babbitt alloy
Ing Babbitt alloy magagamit ya para keng ammonia globe valve na ating temperatura t-70~150°C ampo nominal pressure PN≤2.5MPa.
6. Copper alloy
Deng karaniwan a materyales para keng copper alloys ilapin deng 6-6-3 tin bronze ampo 58-2-2 manganese brass. Ing copper alloy atin yang masanting a wear resistance at masanting ya para keng danum ampo steam na ating temperatura t≤200°C ampo nominal pressure PN≤1.6MPa. Maralas yang gagamitan kenggate valves, globe valves,check valves, plug valves, atbp.
7. Chrome stainless steel
Deng karaniwan a gagamitan a gradu ning chromium stainless steel ilapin deng 2Cr13 ampo 3Cr13, na me-quench ampo me-temper, ampo atin lang masanting a corrosion resistance. Maralas yang magagamit kareng balbula para kareng media antimo ing danum, steam ampo petroleum a maki temperatura t≤450°C ampo nominal pressure PN≤32MPa.
8. Chromium-nickel-titanium stainless steel
Ing karaniwan a gagamitan a grade ning chromium-nickel-titanium stainless steel yapin ing 1Cr18Ni9ti, na atin yang masanting a resistensya keng kaagnasan, resistensya keng erosion ampo resistensya keng pali. Iti masanting ya para keng steam, nitric acid ampo aliwang media na ating temperatura t≤600°C ampo nominal pressure PN≤6.4MPa, gagamitan ya para keng globe valve, ball valve, atbp.
9. Nitrided steel
Ing karaniwan a gagamitan a grade ning nitrided steel yapin ing 38CrMoAlA, na atin yang masanting a corrosion resistance ampo scratch resistance kaybat ning carburizing treatment. Keraklan magagamit ya keng power station gate valve na ating temperatura t≤540°C ampo nominal pressure PN≤10MPa.
10. Boronizing
Ing boronizing diretsu yang magprosesu keng sealing surface ibat keng materyales ning valve body o disc body, at kaybat gagawan na ing boronizing surface treatment, ing sealing surface atin yang masanting a wear resistance. ginamit ya keng power station blowdown valve.
Oras ning pamagpost: Jun-10-2022
