Kunkle Valve 6021GFT01AAM0125 Valve

The Kunkle Valve 6021GFT01AAM0125 is a high-capacity bronze safety relief valve designed specifically for ASME Section I steam boiler applications. Featuring a 1-1/4" MNPT inlet and a 1-1/2" FNPT side outlet, this unit is factory-set at 125 PSI with a certified flow capacity of 3590 PPH. Performance is driven by a Teflon (PFA) disc insert, which ensures superior leak-free shutoff across the full pressure range and reduces maintenance cycles by protecting the seating surface from steam-induced erosion. The full nozzle design and dual control rings allow for precise adjustability, ensuring the valve opens within 3% overpressure with exact blowdown control. Built with a heavy-duty bronze casting and a stainless steel spring, this Kunkle 6021 series valve utilizes a pivoting disc design to correct for spring side thrust and maintain critical alignment. It is the industry standard for overpressure protection in steam generators, pressure reducing stations, and unfired pressure vessels where reliability is non-negotiable.

Key Benefits:

• High Steam Capacity: Certified 3590 PPH flow rate at 125# set pressure meets rigorous ASME Section I standards.
• Tight Shutoff: Teflon (PFA) seat provides exceptional sealing integrity compared to metal-to-metal alternatives.
• Rugged Construction: Corrosion-resistant bronze body and stainless steel spring withstand temperatures up to 406°F.
• Easy Installation: Features a wide hex on the valve nozzle for wrench clearance and a side outlet for piped discharge.
• Manual Testing: Equipped with a heavy-duty plain lift lever for routine functional inspections.

Common Questions:

Can this valve be used for air or gas service?
While some 6000 series models are multi-service, the 6021 suffix indicates a Teflon disc insert optimized specifically for steam applications. For air/gas service, a metal-seated or O-ring model is typically required to meet specific code requirements.

Is the set pressure adjustable in the field?
These valves are factory-set and sealed to maintain National Board certification. Any field adjustments to the 125 PSI setpoint must be performed by an authorized VR-certified repair facility to ensure safety and compliance.

How should the discharge piping be configured?
Discharge piping must be at least the same size as the 1-1/2" FNPT outlet. It must be independently supported to prevent mechanical stress on the valve body and should be piped to a safe location to avoid injury during a relief event.

This item is not eligible for free shipping.

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.