Danfoss 034L0046 Pressure Regulator

The Danfoss 034L0046 (KVL 28) Crankcase Pressure Regulator is a critical component for protecting compressor motors against overload during startup after long standstill periods or defrost cycles. Engineered with 1-1/8 inch ODF solder connections, this regulator maintains a maximum suction pressure, ensuring the motor is not lugging under high load conditions. The KVL 28 features a regulation range of 3 to 87 PSIG and comes with a factory setting of 29 PSIG. Its hermetic construction and stainless steel bellows offer superior vibration resistance and long-term reliability in demanding commercial refrigeration environments. This model is compatible with a wide array of CFC, HCFC, and HFC refrigerants, including R404A, R448A, R449A, R507, and R134a, and is rated for oil-free applications with R1234ze.

Key Benefits for Contractors

• Compressor Motor Protection: Effectively prevents suction pressure from exceeding set limits to avoid motor burnout.
• High Flow Capacity: Delivers a Cv value of 9.25 gal/min, ensuring minimal pressure drop during standard operation.
• Wide Temperature Envelope: Rated for medium temperatures ranging from -76°F to 266°F, making it versatile for various rack configurations.
• Precise Adjustment: The top-mounted adjustment screw allows for fine-tuning the crankcase pressure limit to meet specific system requirements.
• Field Efficiency: Solder ODF connections provide a secure, leak-free joint for 1-1/8" copper lines.

Common Questions

What is the maximum working pressure for the KVL 28?
The Danfoss 034L0046 has a maximum working pressure (MWP) of 260 PSIG, suitable for most low-to-medium pressure refrigerants.

Can this regulator be used with A2L refrigerants?
Yes, the KVL series is designed to be compatible with many newer low-GWP refrigerants; however, always verify specific refrigerant compatibility charts for your specific application.

Where should the KVL be installed in the system?
It must be installed in the suction line immediately before the compressor to effectively regulate the inlet pressure.

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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.