NBR Rubber Bellows
NBR Rubber Bellow, also known as Nitrile Rubber Bellows & NBR Rubber Bellows are mainly used as a cover or expansion joint for connecting moving parts and protect inner components against oil, dust, water, grease, acids, bleaches, etc, also called protective cover and expansion joint bellows.
NBR Rubber Bellows are produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding.
NBR Rubber Bellows Advantages:
1. Excellent Oil-proof: Excellent oil resistance ranks only second to polysulfide rubber, acrylate and FKM 2. High tensile strength and wear resistance.
3. Good Heat Resistance: Working Temperature ranging -35oC-110oC. (Short-period working: 120oC)
4. Good air tightness
5. Strong Adhesion
NBR Rubber Bellows Disadvantages: 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
NBR Rubber Bellows Main Struction and Shape
Straight Convolution NBR Rubber Bellows
Tapered NBR Rubber Bellows
Metal + NBR Rubber Overmolded Bellows NBR Rubber Bellows with Clamp & 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 |
