Sensus 143-16-508-00 Throat Block

The Sensus 143-16-508-00 Throat Block is an essential internal component designed specifically for industrial gas pressure regulation systems. This version is the throat block without O-ring seal, engineered for integration into Sensus 243 and Model 143-80 service regulators. Built to maintain structural integrity under high-flow conditions, this acetal or cast aluminum insert ensures proper stem guide alignment and support within the lower diaphragm case. In the field, technicians rely on this part to facilitate consistent response times in commercial gas regulators, preventing turbulence and protecting the primary diaphragm assembly from mechanical stress during rapid load changes.

For contractors servicing Sensus 243-8 or 243-12 series units, verify that your specific application does not require the secondary stem seal, as the 143-16-508-00 provides a standard mechanical interface rather than an airtight secondary isolation point. This part is fully compatible with natural gas, air, LPG, and other non-corrosive gas services. Its precision-molded design ensures a drop-in fit, reducing labor time during gas regulator maintenance and ensuring the internal relief valve (IRV) or low-pressure cut-off (LPCO) mechanisms function within factory tolerances. Whether you are performing a routine inspection or a complete rebuild, using authentic Sensus regulator parts is critical for maintaining the safety footprint of industrial heating burners and district regulator stations.

• Optimized Flow Dynamics: Reduces internal turbulence to ensure stable outlet pressure control across varying inlet pressures.
• Precision Alignment: Acts as a heavy-duty stem guide, preventing lateral movement that can lead to uneven seat wear.
• Broad Compatibility: Engineered for use in Sensus 243 and 143-80 models across residential and commercial distribution and metering applications.
• Durable Construction: Resistant to the chemical properties of LPG, propane, and nitrogen for long-term service life in the field.

• Is the O-ring included with the 143-16-508-00? No, this specific part number is the throat block without the O-ring seal. If your regulator requires an airtight stem isolation, you must source the version with the O-ring groove.
• Which Sensus regulators use this throat block? It is most commonly found in the Sensus 243 industrial series and some variations of the 143-80 domestic service regulator.
• Can this be used for underground or buried service? No, Sensus 243 and 143 series regulators are not recommended for buried service; they should be installed in protected, above-ground piping arrangements.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.