Khoom zoo
1. Khoom siv & sealing tshuab
FKM O-rings are molded from fluorocarbon rubber (vinylidene fluoride-hexafluoropropylene copolymer) with reinforcing fillers and curing agents. Sealing occurs via compression: contact stress exceeds medium pressure to block leakage. Failure when compression set >25%, swell >15%, los yog nto tawg.
2. Thermal & Chemical Resistance
Kev Pabcuam: -45℃mus rau 300℃txuas ntxiv, nrog kev sib tshuam nce mus txog 250-300℃.. Tau tshaj 1600+ chemicals incl. ntxhia roj, fuels, aromatics, ozone. Swell hauv ASTM Roj B (40℃× 72h) Tsawg dua lossis sib npaug li 8% (ASTM D471). Tsis yog rau ketones, esters, amines, fuming nitric acid, superheated chav.
3. Compression Set & Hardness
Hardness: Ntug A 70 ± 5 (kev cai 60 ~ 90). Compression teeb (200℃× 70h, 25% compression) Tsawg dua lossis sib npaug li 30% (ASTM D395). Tensile Ntau dua lossis sib npaug rau 16MPa, elongation Ntau dua lossis sib npaug li 150%.
4. Nto & Dimensional Precision
Cryogenic deflashing (trim Tsawg dua lossis sib npaug li 0.1mm). Nto Ra Tsawg dua lossis sib npaug li 1.6μm, tsis muaj npuas, tawg, lossis flash. Kev kam rau ua: GB / T 3452.1 M2 (± 0.080.13mm rau C / S; ID / OD kuj M2).
5. Txheem Geometry
Circular cross-section, tsis muaj qhov txav. Ua raws li GB/T 3452.1, AS568, ISO 3601. Standard off-- txee, kev cai ib daim duab.
Khoom Specifications
| Parameter | Specification |
|---|---|
| Khoom siv | Txheem FKM (Fluorocarbon) |
| Hardness (Shore A) | 70±5 |
| Kev Pabcuam Kub | -45℃~ +300 degree |
| Pom zoo Compression Ratio | Static axial: 15% ~ 30%; Static radial: 20% ~ 35%; Dynamic: 10% ~ 20% |
| Max Ua Haujlwm Siab | Tsis muaj lub nplhaib thaub qab Tsawg dua lossis sib npaug ntawm 10MPa; nrog lub nplhaib thaub qab Ntau dua lossis sib npaug ntawm 30MPa |
| Hla -section (C/S) Range | 1.0 ~ 7.0mm (qhov ntau thiab tsawg tau teev saum toj no) |
| ID/OD | Tag nrho GB / AS568 tus qauv loj; kev cai OD Ntau dua lossis sib npaug rau 1.8mm |
| Hla -section Shape | O-ntiv nplhaib (circular) |
| Xim | Dub (tus qauv), xim av / ntsuab yeem |
| Txuj | GB / T 3452.1 / AS568 / ISO 3601 / kev cai kos duab |
| Flash Trim | 45℃phua, txiav precision Tsawg dua los yog sib npaug rau 0.1mm |
| Compression teeb (200℃× 70h) | Tsawg dua lossis sib npaug li 30% (ASTM D395) |
| Tensile zog | Ntau dua lossis sib npaug li 16 MPa |
| Elongation ntawm Break | Ntau dua lossis sib npaug li 150% |
| Nto Roughness | Ra Tsawg dua lossis sib npaug li 1.6μm |
| Ntim | PE kaw lub hnab, cartons cim nrog batch, hnub tim, khoom |
Installation & Kev ua haujlwmTxheej txheem
Cov cheeb tsam no qhia txog qhov ua tiav cov qauv kev khiav hauj lwm tshwj xeeb rau O-ntiv nplhaib installation, npog ua ntej- kev tshuaj xyuas, lubrication, mounting txoj kev, compression tus nqi calibration thiab siab -siab tiv thaiv-extrusion tiv thaiv kom ntseeg tau tias sealing kev ua tau zoo thiab kev pab lub neej.
01
Ua ntej - kev npaj installation
Ua tib zoo ntxuav qhov chaw sib khi kom tshem tawm cov kab mob thiab tshuaj xyuas qhov khawb, qhov lossis burrs ntawm qhov chaw sib txuas.
02
Nto lubrication
Siv cov roj fluorinated uas siv tau los yog cov roj hauv lub cev rau O-rings kom txo cov kev sib txhuam coefficient thiab zam kev puas tsuaj saum npoo thaum sib dhos.
03
Standardized mounting & compression check
Siv cov hlua khi los yog lub tes tsho tapered rau nruab rings tsis muaj twisting; ntsuas lub caj pas qhov ntev txhawm rau txheeb xyuas qhov sib piv compression nyob rau hauv tus qauv ntau yam thiab kuaj tus ncej du txav.
04
High -kev tiv thaiv kev kub ntxhov
Rau siab tshaj 10MPa, haum PTFE/PEEK thaub qab rings ntawm lub siab sab los tswj extrusion qhov khoob thiab nres O- nplhaib extrusion tsis ua hauj lwm
