Danfoss 034L0025 Pressure Regulator

The Danfoss 034L0025 is a high-performance KVP22 evaporator pressure regulator designed to maintain a constant evaporating pressure and surface temperature in various refrigeration and air conditioning systems. Engineered with a 7/8" ODF solder connection, this valve is essential for systems requiring precise load matching or protection against low evaporating pressures. As a veteran-grade HVACR refrigeration control, it effectively prevents evaporator freezing in water chillers and allows for the differentiation of evaporating pressures in multi-evaporator systems linked to a single compressor. With a maximum working pressure of 260 psig and a broad temperature medium range of -49°F to 266°F, the Danfoss KVP 22 ensures reliable operation with oil-free refrigerants such as R1234ze(E) and R513A. The integrated Schrader valve access port simplifies the adjustment of the 29 psig factory setting, allowing technicians to fine-tune the modulating regulation via the suction line to meet specific application requirements.

Key Benefits

• Precise Pressure Modulation: Maintains consistent evaporator pressure control to ensure optimal surface temperatures and prevent product dehydration.
• System Protection: Acts as a critical safeguard against freezing in chiller applications by closing when pressure drops below the setpoint.
• Multi-Evaporator Efficiency: Enables smooth operation of multiple evaporators at different temperatures on a shared suction line.
• Durable Construction: Built to withstand max working pressure up to 260 psig (18 bar) with high-quality ODF solder connections for leak-free performance.
• Versatile Compatibility: Tested for use with a wide range of refrigerants including R22, R134a, R404A, and modern low-GWP alternatives.

Common Questions

How do I adjust the pressure setting on the KVP22?
Remove the protective cap and use the setting screw to dial in the desired pressure. Use the Schrader valve port to monitor the actual evaporating pressure during adjustment. One full turn typically equals a specific pressure change (refer to the Danfoss technical leaflet for the exact ratio).

Can this regulator be used with flammable refrigerants?
The KVP 12 to KVP 22 series is evaluated in accordance with EN13463-1 for use with R290, R600, R600a, and R1270, making it suitable for certain hydrocarbon applications.

What causes flow noise in the suction line when using this valve?
Flow noise often occurs if the gas velocity exceeds 40 m/s at the inlet. Ensure the 7/8" 034L0025 is correctly sized for your system's mass flow requirements; if the valve is undersized, increased velocities will generate turbulence and noise.

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.