Customized EPDM NBR Rubber Bellows Expansion Joint

• Customization: Available
• Material: EPDM
• Capability: Acid Alkali Resistant Rubber Hose
• Model NO.: RB-07
• Materials: Rubber, Silicone, EPDM, Nitrile, FKM, Neoprene
• Forming: Rubber Compression&Injection Molded
• Hardness: 30-90 Shore a
• Function: Anti-Dust & Water & Oil & Grease & Acids etc
• Applications: Machinery, Automobile, Medical Device etc.
• Working Temperature: -40c~230c
• Design Type: Tapered, Straight, Metal Rubber Overmolding etc.
• Surface Finish Process: EDM, Matt Smooth
• OEM&ODM: Yes
• Typical Applications: Expansion Joint, Covers, Sealing etc.
• Transport Package: PP Bags, Carton Boxes
• Specification: SGS, ROHS, FDA etc.
• Trademark: Better
• Origin: Xiamen, China
• HS Code: 39241000
• Production Capacity: 100, 0000/Month

Product Description

EPDM NBR Rubber Bellows Expansion Joint

Rubber Bellows Expansion Joint are used as a cover or expansion joint to protect device or machines, which are made by rubber compression molding, rubber injection mold or extrusion tool.
Rubber Expansion Bellows are designed as a cover mainly protect against dust, water, oil, grease, acids, bleaches, spatter or other environment elements.

Rubber Bellows Expansion Joint-Main Structions and Shapes

Straight Convolution Rubber Bellows

Spiral Convolution Rubber Bellows

Concentric Rubber Bellows

Tapered Rubber Bellows

Metal+Rubber Overmold Bellows 

Rubber Bellows with Clamping, Hole & Lock

Rubber Bellows Expansion Joint-Materials Ddoption

RUBBER COUMPOUNDS TYPES AND REFERENCES
Material	Abbreviation	Temperature Range (dry heat)	Aging Weathering  Ozone	Oil& Grease  Resistance	Water Swell Resistance	Flex-Fatigue	Economy of Material	Material Notes
(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
Fluorocarbon	FKM	5F to 390F	Very Good	Very Good	Good	Average	Poor	Rubber King, Widely Applications

Rubber Bellows Expansion Joint-Design Guide (5 factors considered)

Direction of Travel Required	straight-line motion
	articulating motion
Length of Travel Required	small delta between peak and valley of convolutes
	large delta between peak and valley of convolutes
Interface between Rubber Bellows Ends and Mating Components	An extended straight section with a hose clamp
	A locking grommet securing the bellows into a panel or sheet metal
	An integrated flange with mounting holes
	Completely enclosed bellows ends for protecting parts going up and down
Outside Constraints	Tapered rubber bellows for tapered mechanisms
	Straight rubber bellows (cylindrical rubber bellows) for components with external space constraints.
	Other bellows with different convolutions
Working Environment	Important for materials adoption

Rubber Bellows Expansion Joint-Some Typical Applications:
Expansion joints
Rod & Ball screw covers
Piping penetration seals
Fan duct connections
Compressor and engine intake and exhaust manifold connections

Custom Rubber Bellows Expansion Joint Requirements:
1. Offer 2D, 3D design drawings or samples, and also tell us your sizes telorance demands.
2. Bellows Materials Demands: Rubber, Silicone, EPDM, Nitrile, etc, or tell us operating environments, functions etc.
3. Durometer Demands (Hardness Shore A): 
4.. Silicone Bellows Surface Demand
5. Working Environmment Demands
6.Silicon Bellows Flashing Demands etc.
(Note: Different Silicone Rubber Bellows durometer demands, surface demands, parting lines demands or rubber flashing demands have different production difficulty and production cost. Epecially for mold-making technology demands, compression mold steel choice, mold maintain when mass production etc.)