Sensus 143-16-005-00 Top Cap

The Sensus 143-16-005-00 Top Cap is a critical replacement component for the Sensus 243 Series Gas Pressure Regulator, specifically engineered for the 243-8 and 243-12 models with Internal Relief Valve (IRV) configurations. As a veteran-grade service part, this regulator cover cap provides the necessary seal for the adjustment spring housing, maintaining internal pressure integrity and protecting the adjustment spring button from environmental debris and mechanical interference. In large-capacity gas regulation applications, the absence or failure of this cap can lead to unstable operation or improper relief valve performance.

Constructed for durability in commercial and industrial settings, the 143-16-005-00 ensures a precise fit for the upper diaphragm case assembly. Field technicians should verify the presence of the O-ring seal (often required for a secondary moisture barrier) during installation. This cap is essential when performing routine maintenance or set-point adjustments on Sensus 243-8-2 and 243-12-2 units used in boilers, furnaces, and industrial meter sets.

• Compatible with Sensus 243-8 and 243-12 industrial gas regulators.
• Secures the adjustment screw to maintain consistent outlet pressure set-points.
• Critical for Internal Relief Valve (IRV) models to prevent atmospheric contamination of the spring housing.
• Rugged construction suitable for high-demand HVAC and combustion equipment environments.
• Direct OEM replacement part (Sensus 143-16-005-00) for exact field fitment.

Is this cap compatible with standard non-IRV regulators?
This specific part number is designed for the IRV (Internal Relief Valve) versions of the 243 series. Standard models may require the 143-16-005-08 variant; always verify your regulator's specific model number before installation.

Does this top cap include the O-ring?
While the 143-16-005-00 is the cap itself, it is frequently paired with a specific O-ring (e.g., #2-140 or #2-142) to ensure a gas-tight seal. Check your existing seal's condition when replacing the cap.

Can I operate the regulator without the top cap installed?
Operating without a secure Sensus regulator cap can lead to unstable pressure regulation and allows moisture or debris to enter the case, which may cause premature spring failure or internal corrosion.

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.