Danfoss 034L0052 Pressure Regulator

The Danfoss 034L0052 KVL 35 Crankcase Pressure Regulator is a critical component for protecting compressor motors against overload during startup or after long periods of standstill. This 1-3/8" ODF solder regulator modulates the suction gas flow based on the outlet pressure, ensuring the compressor never exceeds its maximum allowable suction pressure. Built for versatility, the KVL 35 is oil-free compatible and supports a broad range of refrigerants, including R410A, R134a, R404A, R507A, and low-GWP options like R1234ze. With a Max Working Pressure (MWP) of 260 PSIG and a wide regulation range of 3 to 87 PSIG, this valve provides technician-level precision for commercial refrigeration and HVAC systems. Its robust design allows for reliable operation across an ambient temperature range of -76°F to 266°F, making it an essential fail-safe for high-capacity systems.

Key Benefits for Contractors:

• Compressor Protection: Prevents motor burnout by limiting suction pressure during hot pulls or high-load conditions.
• Superior Flow Capacity: Features a high Cv value of 9.25 gal/min, minimizing pressure drop across the suction line once the system reaches operating equilibrium.
• Hermetic Construction: The solder ODF connection ensures a leak-free installation, maintaining system integrity even in high-vibration environments.
• Broad Compatibility: Fully compatible with HCFC, HFC, and HFO refrigerants, as well as oil-free centifugal or screw compressor oil-free systems.
• Field Adjustable: While factory set at 29 PSIG, the KVL 35 allows for precise field tuning to meet specific suction pressure requirements.

Common Questions:

Where should the KVL 35 be installed in the system?
The regulator must be installed in the suction line immediately before the compressor. Always ensure the flow arrow on the valve body points toward the compressor.

Can this regulator handle high discharge temperatures?
Yes, the unit is rated for media temperatures up to 266°F, allowing it to withstand the demanding conditions found in high-cycle commercial applications.

Does the Danfoss 034L0052 require a specific mounting orientation?
While it can be installed in any position, it is best practice to install it in a horizontal line to prevent oil trapping, prioritizing the protection of the compressor crankcase.

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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.