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Buna n Expansion Bellows

Buna n Expansion Bellows are also called Nitrile & Buna n Expansion Bellows, which mainly are used as a protective cover expansion joints & boots to maintain inner equipment preformance, especially, oil-proof performance.

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Model:
BT-JRB

Product Description

Buna n Expansion Bellows

Buna n Expansion Bellow are also call Nitrile & Buna n Bellows, which are mainly used as a protective cover expansion joints & boots to maintain inner equipment preformance, especially, oil-proof performance. Elastomer Buna n Expansion Bellows mainly made by silicone rubber compression molding, extrusion moulding or rubber injection moulding.
Buna n Bellows

Buna n Expansion Bellows Advantage:
1. Excellent Oil-proof: Excellent oil resistance after polysulfide rubber, acrylate and FKM

2. High tensile strength and wear resistance.
3. Good Heat Resistance: Working Temperature -35^oC-110^oC. (Short-period working: 120^oC)
4. Good air tightness
5. Strong Adhesion

Buna n Expansion Bellows Disadvantage:

1. Poor ozone resistance, against storage

2. Poor electrical property

3. No resistance to aromatic solvents, halogenated hydrocarbon solvents and ketones & esters solvents

4. Low elasticity

Buna n Expansion Bellows Main Struction and Shape

Straight Convolution Buna n Expansion Bellows
Buna n Rubber Bellows

Tapered Buna n Expansion Bellows
Tapered Buna n Bellows

Metal + Buna n Overmolded Expansion Bellows

Buna n Expansion Bellows with Clamping, Holes & Locks
Buna n Bellows with Clamp

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

NBR

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Buna n Expansion Bellows

Buna n Expansion Bellows

Buna n Expansion Bellows

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