Maxitrol R9110-512 Spring

The Maxitrol R9110-512 is a field-proven blue spring engineered for precise pressure regulation within the 5-12" WC (water column) range. Designed specifically for use with high-capacity RV91 and 210E Series regulators, this component is essential for technicians performing regular service or manifold pressure adjustments on commercial gas systems. As a genuine Maxitrol replacement part, it ensures your straight-thru-flow (STF) regulators maintain peak sensitivity and accuracy, even at low pressure differentials, preventing common issues like flame instability or lockout on high-demand equipment.

This gas regulator spring is constructed from corrosion-resistant spring steel, providing the reliable cycling required for industrial and multi-stage commercial boilers. By swapping the standard spring for the R9110-512, contractors can expand the operational flexibility of natural gas and LP systems without replacing the entire valve body. Whether you are troubleshooting gas pressure drop issues or conducting a new installation, this blue color-coded spring offers immediate visual identification for fast verify and calibrate procedures in the field.

• Specifically calibrated for 5" to 12" W.C. outlet pressure delivery.
• Compatible with Maxitrol RV91 and 210E Series gas regulators.
• Supports Straight-Thru-Flow design for maximum capacity and precise control.
• Durable steel construction resists mechanical fatigue during high-cycle operation.
• Simple color-coded blue identification prevents incorrect field installation.

• How do I install the R9110-512 into an RV91 regulator? Remove the regulator seal cap, back out the adjustment screw, remove the existing spring, and seat the blue spring carefully before re-calibrating the outlet pressure with a manometer.
• Can this spring be used for Liquid Propane (LP) applications? Yes, this spring is compatible with natural, manufactured, mixed gases, and LP gas-air mixtures when used in the correct regulator body.
• What is the difference between the blue and green springs? The blue R9110-512 covers the 5-12" WC range, whereas the green R9110-515 is designed for higher outlet pressures between 5-15" WC.

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.