Product Description
Crown CR 74239 is an OEM quad ring for electric lift truck hydraulic and pneumatic sealing applications, molded from NBR elastomer to standard industrial quad ring profile, compatible with reciprocating and static service, and specified for typical system pressures up to 1500 PSI.
Specifications
Material & Construction
| Surface Finish | Precision-molded elastomer with low friction contact surfaces |
Part Numbers
| OEM Part Number | CR 74239 |
| Manufacturer Part Number | CR74239 |
Frequently Asked Questions
Q: What material is the CR 74239 quad ring made from?
A: The CR 74239 is molded from NBR (nitrile butadiene rubber) elastomer. NBR provides reliable sealing performance across a wide temperature and pressure range in hydraulic and pneumatic systems.
Q: What is the maximum pressure rating for the CR 74239?
A: The CR 74239 is rated for system pressures up to 1500 PSI. It is designed for both static and reciprocating service in electric lift truck hydraulic and pneumatic applications.
Q: What is the difference between a quad ring and an O-ring?
A: The CR 74239 quad ring has four sealing surfaces instead of the two on a standard O-ring. The quad ring profile reduces friction and provides superior sealing performance in reciprocating applications.
Q: How does the CR 74239 perform in high-temperature environments?
A: NBR elastomer, used in the CR 74239, maintains seal integrity across typical industrial operating temperatures. Consult the full specification sheet for exact temperature range limits before use in extreme conditions.
Q: What does precision-molded elastomer mean on the CR 74239 specification?
A: Precision-molded elastomer indicates the CR 74239 is manufactured to strict dimensional tolerances and finished with low-friction contact surfaces. This ensures consistent seal performance and reduces internal friction losses.