Is the O-ring gasket for SAE flanges, NBR compatible with hydraulic oils and common industrial fluids?

Format: O-ring gasket for SAE flanges, NBR Yes. The O-ring gasket for SAE flanges, NBR (nitrile rubber, also known as NBR or Buna-N) is broadly compatible with hydraulic oils and most common industrial fluids. NBR exhibits excellent resistance to petroleum-based hydraulic fluids, mineral oils, lubricating oils, and many greases, making it a standard choice for hydraulic sealing applications including SAE flange connections. It also offers good mechanical properties such as tensile strength and abrasion resistance, suitable for static and dynamic sealing in typical operating temperatures (commonly approximately -30Â°C to +100Â°C, depending on formulation). Limitations: NBR has reduced compatibility with some fluids . it is not recommended for continuous exposure to phosphate esters, certain synthetic hydraulic fluids (e.g., some PAO, ester-based fluids), ketones, strong acids/alkalis, chlorinated hydrocarbons, and some brake fluids. High temperatures, ozone, and prolonged exposure to aggressive chemicals can accelerate swelling, hardening, or loss of elasticity. For critical or atypical fluids (synthetic oils, flame-retardant hydraulics, aggressive solvents), verify compatibility with the specific NBR compound and operating conditions or consider alternative elastomers (e.g., FKM, EPDM, HNBR). Conclusion: For standard petroleum-based hydraulic oils and common industrial fluids, the O-ring gasket for SAE flanges, NBR is generally suitable; for unusual fluids, high temperatures, or safety-critical systems, confirm compatibility with fluid manufacturer data or choose a more resistant material.

What temperature range can the O-ring gasket for SAE flanges, NBR reliably operate within?

What temperature range can the O-ring gasket for SAE flanges, NBR reliably operate within? The O-ring gasket for SAE flanges, NBR typically operates reliably between -40Â°C and +100Â°C (-40Â°F to +212Â°F). Continuous use above +100Â°C may reduce elasticity and lifespan; short-term exposure up to +120Â°C can be tolerated in some cases. Below -40Â°C the NBR becomes harder and less sealing-effective. Exact limits depend on formulation and pressure - consult supplier data for specific application.

How should I size the O-ring gasket for SAE flanges, NBR to ensure proper sealing and fit?

How should I size the O-ring gasket for SAE flanges, NBR to ensure proper sealing and fit? To size the O-ring gasket for SAE flanges, NBR correctly, follow these steps: 1. Identify the SAE flange standard and groove type (SAE J518 / J1453 common). Confirm flange class and whether it uses O-ring boss, flat-face with O-ring, or male/female O-ringed face. 2. Measure flange groove dimensions: - Groove diameter (ID): measure the inner diameter of the groove where the O-ring sits. - Groove width and depth: measure to determine recommended cross-section and compression. - If no groove, measure flange mating surface diameter where the O-ring will compress. 3. Select O-ring cross-section (CS) and material: - For NBR (nitrile), choose cross-section that achieves proper squeeze per SAE specâtypically 10â30% radial compression for static flange seals. Common CS sizes: 3.53 mm (AS568-214), 4.57 mm (AS568-214/215 range), or per SAE groove callout. - Ensure NBR hardness (durometer, e.g., 70 Shore A) suits fluid/temperature. 4. Determine O-ring inner diameter (ID): - For groove-installed O-rings, O-ring ID equals groove ID minus nominal stretch/relaxation allowance. Many flange specs call for O-ring to sit un-stretched in groove; use groove ID equal to O-ring ID. - For face seals where O-ring sits on male part, choose O-ring ID slightly smaller to provide slight stretch (typically 1â3% stretch) for retention without excessive stress. 5. Check squeeze and stretch: - Radial compression (squeeze) should be 10â30% of cross-section for effective static sealing. Calculate squeeze = (CS - compressed CS) / CS. - If O-ring is stretched, keep stretch under ~3â5% for NBR to avoid reduced life; high stretch increases tension and extrusion risk. 6. Consider gland fill and extrusion gaps: - Ensure groove depth allows proper compression and that clearance to mating face prevents extrusionâuse backup rings if necessary for low hardness or high pressure. - For high-pressure SAE applications, verify groove design matches SAE recommended dimensions or use compatible backup rings. 7. Temperature, fluid compatibility, and pressure: - Confirm NBR is suitable for the hydraulic fluid and operating temperature (NBR typically -30Â°C to +100Â°C). Adjust material or hardness if needed. - For pressures beyond NBR capability, consider reinforced seal designs. 8. Verify with SAE and manufacturer tables: - Cross-check measurements with SAE standard tables or O-ring manufacturer catalogs for recommended O-ring size (ID x CS) for the specific flange and groove. 9. Prototype and test: - Install the chosen O-ring gasket for SAE flanges, NBR, assemble at recommended torque, and perform pressure and leak testing under operating conditions. Following these steps ensures the O-ring gasket for SAE flanges, NBR fits correctly, achieves proper squeeze and retention, and provides reliable sealing.

O-ring gasket for SAE flanges, NBR

All products, Fittings for high-pressure hoses/

Additional information

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

O-ring gasket for SAE flanges. Material: NBR.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-USK110-08	O-ring seal 18.64x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-12	O-ring seal 24.99x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-16	O-ring seal 32.92x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-20	O-ring seal 37.69x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-24	O-ring seal 47.22x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-32	O-ring seal 56.74x3.53 mm, NBR90	-	-	In stock	Enquiry
TI-USK110-40	O-ring seal 69.44x3.53 mm (2.1/2"), NBR90	-	-	In stock	Enquiry
TI-USK110-48	O-ring gasket 85.32x3.53 mm (3"), NBR90	-	-	In stock	Enquiry
TI-USK110-56	O-ring seal 98.02x3.53 mm (3.1/2"), NBR90	-	-	In stock	Enquiry
TI-USK110-64	O-ring gasket 110.72x3.53 mm (4"), NBR90	-	-	In stock	Enquiry