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The SUPERIOR NP-213 is a brass threaded inlet nipple designed for use with compressed gas cylinders and regulator assemblies. This fitting provides a secure, leak-resistant threaded connection between the cylinder valve outlet and downstream regulator or equipment. Constructed from brass, the NP-213 measures 1.25 inches in length and is rated for working pressures up to 500 psi. The 1/8 inch NPT thread size makes it compatible with standard regulator inlet ports. It ships as a single unit and is a standard component in industrial gas supply and service work.
This nipple is used in compressed gas systems where a CGA 540 connection standard applies, typically in oxygen service and similar high-pressure cylinder applications. It is suited for commercial, industrial, and medical gas distribution setups. Technicians and gas equipment service professionals install this fitting when assembling or replacing regulator inlet connections on CGA 540-compatible cylinder valves. The NP-213 is comparable to Western 305-3A for cross-reference purposes.
Designed for use with CGA 540 cylinder valve outlets. Comparable to Western 305-3A. Verify thread size and CGA standard against your regulator and cylinder valve specifications before installation.
Installation of compressed gas fittings should be performed by a qualified technician familiar with high-pressure gas systems and applicable codes. Always close the cylinder valve and bleed downstream pressure completely before removing or installing any fitting. Use appropriate thread sealant rated for the specific gas service — never use standard pipe dope on oxygen service fittings. Inspect threads for damage before assembly and do not overtighten, as brass threads can be damaged by excessive torque.
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