Metal Silicone Rubber Bellows

Rubber Bellow, known as Expansion Joints, convoluted Rubber Boots, flexible medical silicone bellows, which made from elastomer rubber like EPDM , VMQ, CR, NBR etc, and as essential protective appliance to seal dust, oil proof and other environmental elements in aim to maintain equitment preformance in medical, automotive, pumping, industrial appliance.
Metal Rubber Bellows, which metal + silicone rubber overmolded when production.

Rubber Bellows Main Struction and Shape

Straight Convolution Rubber Bellows

Tapered Rubber Bellows


Metal + Rubber Overmolded Bellows

Rubber Bellows with Clamping, Holes & Locks


Rubber Bellows Main Materials

Material	Abbreviation	Temperature Range	Aging Weathering Ozone	Resistance to Oil & Grease	Water Swell Resistance	Flex-Fatigue	Economy of Material	Material Notes
Chloroprene(Neoprene)	CR	-40F to 250F	Good	Good	Average	Very Good	Good	exposure to refrigerants,can be compounded for FDA applications
Nitrile	NBR	-22F to 212F	Poor	Very Good	Good	Good	Very Good	Automotive Applications, Good Oil Proof
Ethylence-Propylene	EPDM,EPM	-60F to 300F	Very Good	Poor	Very Good	Good	Very Good	Outside Applications, Good Weather Proof
Silicone	VMQ	-75F to 450F	Very Good	Average	Very Good	Very Good	Average	Medical Applications
Fluo Rubber	FKM	5F   to 390F	Very Good	Very Good	Good	Average	Poor	Rubber King, Widely Applications