Danfoss 034N0084 CPCE22 Bypass Regulator

The Danfoss 034N0084 CPCE22 Hot Gas Bypass Regulator is a servo-operated valve engineered to synchronize compressor capacity with actual evaporator load. This 7/8" ODF hot gas bypass valve maintains a stable minimum suction pressure by injecting hot gas into the low-pressure side of the system, typically between the expansion valve and the evaporator. By utilizing a Danfoss CPCE 22 regulator, technicians can effectively prevent evaporator icing and erratic cycling during low-load conditions. This model features a 0 to 85 psig regulation range and is compatible with a broad spectrum of refrigerants, including R410A, R404A, R448A, and R134a. Designed for high-pressure applications, it supports a maximum working pressure of 406 psig and operates within a temperature range of -58°F to 284°F. Its robust construction facilitates direct connection to the suction line via a 7/16"-20 UNF flare pilot connection, ensuring precise superheat control and extended compressor service life in commercial HVACR installations.

Key Benefits for Contractors

• Enhanced System Stability: Maintains constant evaporator pressure to prevent coil freeze-ups and short-cycling in variable load environments.
• Broad Refrigerant Compatibility: Fully approved for use with modern low-GWP refrigerants like R448A, R449A, and R452A, as well as legacy fluids like R22 and R134a.
• Advanced Serviceability: Designed for field maintenance with components compatible with standard Danfoss KV valve spare parts, reducing long-term downtime.
• Precise Capacity Matching: Allows for hot gas injection through an LG liquid gas mixer to ensure a homogeneous mixture, protecting the compressor from liquid slugging.
• Durable Technical Build: Features a 450 psig test pressure rating and UL certification, meeting rigorous safety standards for industrial and commercial refrigeration.

Common Questions

Where should the CPCE 22 be installed in the refrigeration circuit?
For optimal performance, the CPCE 22 should be installed in a bypass line between the high-pressure discharge side and the low-pressure side. Injection is most effective when introduced between the thermostatic expansion valve and the evaporator inlet, ideally using a Danfoss LG liquid gas mixer.

Can the regulation range be adjusted in the field?
Yes, the regulator features an adjustable set point within the 0 to 85 psig range, allowing technicians to calibrate the bypass threshold based on specific system suction pressure requirements.

Is this model compatible with POE or PVE oils?
The materials and seals used in the 034N0084 construction are compatible with standard refrigeration oils used in modern HFC and HFO systems, including POE and PAG lubricants.

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.