KELONG Rubber O-Ring Seals
Material	Hardness(Shore A)	Temperature	Size
			Standard Size	Available
NBR(Buna,Nitrile) FKM(FPM) EPDM Silicone(VMQ) HNBR EFKM PU PTFE	60-90 70-90 60-90 10-70 60-90 70-90 90~95 60~70	55℃-110℃ -20℃-250℃ -45℃-150℃ 60℃-280℃ 48℃-180℃ -18℃-326℃ -40℃-90℃ -100℃-280℃	AS-568(USA) JIS-B2401(Japan) DIN-3771(Germany) BS-1516(UK) ISO3601(International) R(France)	ID≤2000mm CS≤40mm
Resistance	Color	Certificate	Application
Hydraulic Fluid Engine Oil Chemical Ozone Steam & Hot Water Low Temperature High Temperature	Black Brown Red Green White Blue Clear Customized	IS09001 IS014001 TS16949 RoHS REACH FDA SGS	Auto Industry Construction Machinery Machine Tool Equipment Food Health Water Treatment Chemical Processing Hydraulic Pneumatic Industrial Manufaturing

Chemical Resistance Guide of Elastomer
	Fluid	HNBR	NBR	EPDM	CR	CSM	VMa	FKM	ACM
	Steam (150°℃)	〇	×	◎	×	×	×	△	×
Organic Acid	Acetic Acid	〇	〇	◎	◎	◎	◎	〇	×
Inorganic Acid	hydrochloric Acid (25%)	〇	〇	◎	◎	◎	◎	〇	×
	Phosphoric Acid (20%)	◎	〇	◎	〇	◎	〇	◎	—
	Nitric Acid (25%)	〇	×	〇	◎	◎	〇	△	×
Base	Sodium Hydroxide (30%)	◎	〇	◎	×	◎	〇	〇	一
Base	Ammonia(28%)	◎	◎	◎	◎	◎	◎	〇	×
Salt Solution	NaCl(30%)	◎	◎	◎	◎	◎	◎	◎	—
Salt Solution	Na: CO₃ (10%)	◎	◎	◎	◎	◎	◎	〇	—
Oxidizing Agent	Hydrogen Peroxide (3%)	〇	△	〇	△	◎	◎	◎	—
Oxidizing Agent	Sodium Chloride(5%)	〇	×	〇	×	〇	〇	◎	×
Parafinc Fluid	Isooctane	◎	◎	×	〇	〇	×	◎	◎
Aromatic Fluid	Benzene	△	△	×	×	×	△	◎	×
Chlorinated Fluid	Trichloroethylene	△	△	×	×	×	×	◎	一
Alcohol	Methanol	◎	◎	◎	◎	◎	◎	△	×
Alcohol	Ethanol	◎	◎	◎	◎	◎	◎	◎	×
Ether	Ethyl Ether	△	△	△	×	×	×	×	×
Ester	Ethyl Ester	×	×	〇	△	△	×	△	—
Ketone	Methyl Ethyl Ketone	×	×	◎	×	×	×	×	×
Aldehyde	Furfural	〇	△	◎	×	×	×	×	×
Amine	Trihydroxyethylamine	◎	△	◎	◎	◎	×	×	×
Amine	Carbon Disulfide	△	△	×	×	×	—	◎	—
◎ :Excellent 〇:Good △:Fair ×:Poor

FKM FFKM NBR O Rings Rubber EPDM O Ring Seal Customized SGS approved

Customized NBR O Rings