What are the temperature and chemical compatibility limits for the O-ring seal (range 18x1.5 Ã· 35x4), NBR70?

O-ring seal (range 18x1.5 Ã· 35x4), NBR70 Temperature limits: - Typical service temperature range: -30Â°C to +100Â°C. - Short-term peaks may be tolerated up to about +120Â°C, but prolonged exposure above +100Â°C will accelerate hardening and loss of elasticity. - Below -30Â°C NBR becomes stiffer and loses sealing performance. Chemical compatibility (general guidance): - Good compatibility: mineral oils, hydraulic oils, petroleum-based fuels, greases, water (fresh), alcohols (short contact), dilute acids and alkalis (weak concentrations). - Limited/conditional compatibility: animal and vegetable oils, certain brake fluids, refrigerants (depends on type), steam (low pressure, brief exposure) . performance may be reduced. - Poor/incompatible: aromatic and chlorinated hydrocarbons (benzene, toluene, xylene, trichloroethylene), ketones (acetone), esters, strong oxidizing acids, hot concentrated acids/alkalis, silicone fluids, ozone and many chlorinated solvents . these cause swelling, softening, cracking or rapid degradation. Notes: - Compatibility varies with temperature, chemical concentration and exposure time; for critical applications, perform specific compatibility testing or consult supplier chemical resistance charts for NBR (Nitrile, 70 Shore A).

How should I size grooves for the O-ring seal (range 18x1.5 Ã· 35x4), NBR70 to ensure proper compression and sealing?

For O-ring seal (range 18x1.5 Ã· 35x4), NBR70: Size grooves to achieve 20â30% static compression (squeeze) and 5â15% radial stretch where applicable. Use these guidelines: - Cross-section squeeze: target 20â30% of O-ring cross-section diameter (e.g., for 3.5 mm cord, squeeze 0.7â1.05 mm). - Groove depth (static face/gland): groove depth = cord diameter â target squeeze. Example: 3.5 mm cord â depth â 2.45â2.8 mm. - Groove width: cord diameter + 2Ã extrusion gap (0.5â1.0 mm total). For 3.5 mm cord â width â 4.0â5.0 mm. - For radial applications (shaft/bore): allow 5â15% stretch; inner diameter clearance must account for stretch and assembly. - Surface finish: Ra â¤ 0.8 Âµm; hardness compatibility with NBR70. - Tolerances: follow ISO 3601 or AS568 guidance for groove dimensions and manufacturing tolerances. - Lubrication: use compatible lubricant during assembly to prevent damage. Validate with actual cord sizes in range 18x1.5 Ã· 35x4 and prototype test under pressure and temperature expected.

Can O-ring seal (range 18x1.5 Ã· 35x4), NBR70 be used in dynamic applications (reciprocating/rotating) and what are limits?

O-ring seal (range 18x1.5 Ã· 35x4), NBR70 Format. suitability for dynamic applications and limits Yes. O-ring seal (range 18x1.5 Ã· 35x4), NBR70 can be used in dynamic applications (reciprocating and low-speed rotary), but with clear limitations. NBR (nitrile rubber) hardness 70 Shore A gives good resistance to oil, fuels and many hydraulic fluids and reasonable mechanical strength; however its performance in dynamic sealing depends on geometry, surface finish, lubrication and operating conditions. Key limits and recommendations: - Motion type and speed: Suitable for reciprocating motion and slow rotary (<0.5â1 m/s surface speed). For higher rotary speeds friction, heat build-up and extrusion risk increase; prefer dedicated rotary seals for continuous rotation. - Pressure: For moderate pressures typical of general-purpose Oârings. At higher pressures use backup rings to prevent extrusion, especially with larger cross-sections (up to 35x4). - Temperatures: Typical NBR operating range about -30Â°C to +100Â°C (short excursions to ~120Â°C possible). Above this range NBR hardens/ages faster; low temps reduce elasticity and increase friction. - Wear and friction: NBR70 has moderate friction and wear resistance; ensure good lubrication (fluid being sealed or external lubricant) and polished mating surfaces (Ra preferably â¤0.4 Âµm for dynamic seals) to minimize wear. - Groove design and squeeze: Correct gland design and appropriate squeeze (typically 10â25% compression depending on application) are critical to avoid excessive friction or extrusion. For reciprocating seals minimize twist and side-load. - Stroke and frequency: Short to moderate strokes and moderate cycle rates are acceptable. Long strokes or high-frequency reciprocation increase rolling/sliding wear. - Fluid compatibility: Excellent with mineral oils and many hydrocarbons; poor with ketones, some esters, strong acids/alkalis and certain solvents. verify compatibility with the specific medium. - Size effects: Smaller cross-sections (18x1.5 range) are more prone to extrusion and faster wear; larger cross-sections (up to 35x4) provide better durability but require proper groove clearance and may increase friction. Conclusion: Use O-ring seal (range 18x1.5 Ã· 35x4), NBR70 for reciprocating and low-speed rotary applications with moderate pressure, correct gland design, good lubrication, and within NBR temperature and chemical limits. For continuous high-speed rotation, high pressure without back-up rings, aggressive chemicals or extreme temperatures choose specialized dynamic seals or alternative materials.

O-ring seal (range 18×1.5 ÷ 35×4), NBR70

All products, General purpose seals/

O-ring seal (range 18x1.5 ÷ 35x4), NBR70

Additional information

Maximum operating temperature [°C]	100
Minimum operating temperature [°C]	-30

Circular cross-section gasket (o-ring) for general use (range 18×1.5 to 35×4). Material: NBR, hardness 70 Shore.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-UO-018,64X3,53-N70	O-ring 18.64x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-018,72X2,62-N70	O-ring 18.72x2.62 NBR70	-	-	In stock	Enquiry
TI-UO-018X1,5-N70	O-ring 18x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-018X2-N70	O-ring 18x2 NBR70	-	-	In stock	Enquiry
TI-UO-018X3-N70	O-ring 18x3 NBR70	-	-	In stock	Enquiry
TI-UO-018X4,5-N70	O-ring 18x4.5 NBR70	-	-	In stock	Enquiry
TI-UO-018X5-N70	O-ring 18x5 NBR70	-	-	In stock	Enquiry
TI-UO-019,3X2,4-N70	O-ring 19.3x2.4 NBR70	-	-	In stock	Enquiry
TI-UO-019X1,5-N70	O-ring 19x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-019X2,5-N70	O-ring 19x2.5 NBR70	-	-	In stock	Enquiry
TI-UO-019X2-N70	O-ring 19x2 NBR70	-	-	In stock	Enquiry
TI-UO-019X3-N70	O-ring 19x3 NBR70	-	-	In stock	Enquiry
TI-UO-020,22X3,53-N70	O-ring 20.22x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-020,29X2,62-N70	O-ring 20.29x2.62 NBR70	-	-	In stock	Enquiry
TI-UO-020,3X2,4-N70	O-ring 20.3x2.4 NBR70	-	-	In stock	Enquiry
TI-UO-020X1,5-N70	O-ring 20x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-020X2-N70	O-ring 20x2 NBR70	-	-	In stock	Enquiry
TI-UO-020X3,5-N70	O-ring 20x3.5 NBR70	-	-	In stock	Enquiry
TI-UO-020X3-N70	O-ring 20x3 NBR70	-	-	In stock	Enquiry
TI-UO-021,82X3,53-N70	O-ring 21.82x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-021,95X1,78-N70	O-ring 21.95x1.78 NBR70	-	-	In stock	Enquiry
TI-UO-021X1,5-N70	O-ring 21x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-021X1-N70	O-ring 21x1 NBR70	-	-	In stock	Enquiry
TI-UO-021X2-N70	O-ring 21x2 NBR70	-	-	In stock	Enquiry
TI-UO-021X3,5-N70	O-ring 21x3.5 NBR70	-	-	In stock	Enquiry
TI-UO-022,3X2,4-N70	O-ring 22.3x2.4 NBR70	-	-	In stock	Enquiry
TI-UO-022X1,5-N70	O-ring 22x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-022X1-N70	O-ring 22x1 NBR70	-	-	In stock	Enquiry
TI-UO-022X2,5-N70	O-ring 22x2.5 NBR70	-	-	In stock	Enquiry
TI-UO-022X2-N70	O-ring 22x2 NBR70	-	-	In stock	Enquiry
TI-UO-022X3-N70	O-ring 22x3 NBR70	-	-	In stock	Enquiry
TI-UO-023,2X3-N70	O-ring 23.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-023,4X3,53-N70	O-ring 23.4x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-023X1,5-N70	O-ring 23x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-024,2X3-N70	O-ring 24.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-024,99X3,53-N70	O-ring 24.99x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-024X1,5-N70	O-ring 24x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-024X2-N70	O-ring 24x2 NBR70	-	-	In stock	Enquiry
TI-UO-024X3-N70	O-ring 24x3 NBR70	-	-	In stock	Enquiry
TI-UO-024X4-N70	O-ring 24x4 NBR70	-	-	In stock	Enquiry
TI-UO-025,2X3-N70	O-ring 25.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-025,3X2,4-N70	O-ring 25.3x2.4 NBR70	-	-	In stock	Enquiry
TI-UO-025X1,5-N70	O-ring 25x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-025X1-N70	O-ring 25x1 NBR70	-	-	In stock	Enquiry
TI-UO-025X2-N70	O-ring 25x2 NBR70	-	-	In stock	Enquiry
TI-UO-025X3-N70	O-ring 25x3 NBR70	-	-	In stock	Enquiry
TI-UO-025X4-N70	O-ring 25x4 NBR70	-	-	In stock	Enquiry
TI-UO-026,2X3-N70	O-ring 26.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-026,58X3,53-N70	O-ring 26.58x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-026X1,5-N70	O-ring 26x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-026X2-N70	O-ring 26x2 NBR70	-	-	In stock	Enquiry
TI-UO-026X3-N70	O-ring 26x3 NBR70	-	-	In stock	Enquiry
TI-UO-027,3X2,4-N70	O-ring 27.3x2.4 NBR70	-	-	In stock	Enquiry
TI-UO-027X1,5-N70	O-ring 27x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-027X2,5-N70	O-ring 27x2.5 NBR70	-	-	In stock	Enquiry
TI-UO-027X2-N70	O-ring 27x2 NBR70	-	-	In stock	Enquiry
TI-UO-027X3-N70	O-ring 27x3 NBR70	-	-	In stock	Enquiry
TI-UO-028,17X3,53-N70	O-ring 28.17x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-028X1,5-N70	O-ring 28x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-028X2-N70	O-ring 28x2 NBR70	-	-	In stock	Enquiry
TI-UO-028X3-N70	O-ring 28x3 NBR70	-	-	In stock	Enquiry
TI-UO-028X4-N70	O-ring 28x4 NBR70	-	-	In stock	Enquiry
TI-UO-029,75X3,53-N70	O-ring 29.75x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-029X1,5-N70	O-ring 29x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-030,2X3-N70	O-ring 30.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-030X1,5-N70	O-ring 30x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-030X2-N70	O-ring 30x2 NBR70	-	-	In stock	Enquiry
TI-UO-030X3-N70	O-ring 30x3 NBR70	-	-	In stock	Enquiry
TI-UO-030X4-N70	O-ring 30x4 NBR70	-	-	In stock	Enquiry
TI-UO-031,34X3,53-N70	O-ring 31.34x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-031X1,5-N70	O-ring 31x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-032,2X3-N70	O-ring 32.2x3 NBR70	-	-	In stock	Enquiry
TI-UO-032,92X3,53-N70	O-ring 32.92x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-032X1,5-N70	O-ring 32x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-032X2-N70	O-ring 32x2 NBR70	-	-	In stock	Enquiry
TI-UO-032X3-N70	O-ring 32x3 NBR70	-	-	In stock	Enquiry
TI-UO-032X4-N70	O-ring 32x4 NBR70	-	-	In stock	Enquiry
TI-UO-033X1,5-N70	O-ring 33x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-033X2-N70	O-ring 33x2 NBR70	-	-	In stock	Enquiry
TI-UO-034,3X4,6-N70	O-ring 34.3x4.6 NBR70	-	-	In stock	Enquiry
TI-UO-034,52X3,53-N70	O-ring 34.52x3.53 NBR70	-	-	In stock	Enquiry
TI-UO-034X1,5-N70	O-ring 34x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-034X2-N70	O-ring 34x2 NBR70	-	-	In stock	Enquiry
TI-UO-034X3-N70	O-ring 34x3 NBR70	-	-	In stock	Enquiry
TI-UO-035X1,5-N70	O-ring 35x1.5 NBR70	-	-	In stock	Enquiry
TI-UO-035X2,5-N70	O-ring 35x2.5 NBR70	-	-	In stock	Enquiry
TI-UO-035X2-N70	O-ring 35x2 NBR70	-	-	In stock	Enquiry
TI-UO-035X4-N70	O-ring 35x4 NBR70	-	-	In stock	Enquiry