The Kunkle Valve 0537-D01-AHM0050 is a high-capacity ASME Section IV pressure relief valve specifically engineered for protection against overpressure in hot water boilers

It should be replaced whenever the gas/air arm is disassembled for service or if there are visible signs of degradation or combustion leaks

Automatic Reset Logic: The 40°F differential (resetting at 150°F) facilitates a reliable auto-reset limit switch cycle without manual system restarts

providing contractors with a reliable way to safeguard high-value assets against vandalism and condenser unit theft

Technically designated as a diaphragm hung valve

Belimo ZG-R03 Resistor Kit 318172-701 The Kunkle Valve 0537-D01-AHM0050 isThe Belimo ZG R03 is a critical resistor kit designed specifically for field integrating MFT95 actuators into legacy 0 135 Ohm control applications. As a veteran technician knows, matching modern Multi Function Technology with older 135 ohm proportional controllers requires precise impedance matching to ensure stable signal response. This 135 ohm resistor bridges the gap between the high input impedance of MFT actuators and the specific current