The Danfoss 034G2851 electric regulating valve (KVS 42) is engineered for high-capacity HVAC and refrigeration systems. Designed for systems using refrigerants such as R22, R134a, and R404A, this valve offers precision flow control, energy-efficient operation, and reliable performance under a wide temperature range. Ideal for industrial chillers, walk-in freezers, and large-scale commercial refrigeration.

Key Features

• Refrigerant compatibility: R22, R134a, R404A, R407A, R407C, R407F, R410A, R422B, R422D, R438A, R448A, R449A, R450A, R452A, R507A, R513A, R1234ze(E)
• Rated capacity: 40.4 kW (11.4 tons) with R22, 29.3 kW (8.3 tons) with R134a, 35.3 kW (10 tons) with R404A
• Temperature range: -40 F to 150 F
• Connections: 1 3/8 inch Solder ODF inlet × 1 3/8 inch Solder ODF outlet
• Valve type: Straightway, externally equalized, bi-flow
• Capillary tube: Not applicable
• Maximum working pressure: 493 psig
• Flow time speed: 12.7 to 25.4 seconds
• Enclosure rating: IP67
• Electrical connection: M12, 4-pin male, step motor (bi-polar), 11.5V to 13.8V DC
• Resistance: 0.1 kOhm
• Compatible controllers: EKC 368, EKE 1A, EKE 1B, EKE 1C
• Balanced port: Yes

Applications

This high-capacity electric regulating valve is suitable for use in large commercial and industrial refrigeration systems, such as cold storage warehouses, process chillers, and supermarket refrigeration racks requiring precise electronic expansion valve control with multi-refrigerant flexibility.

Competitor Equivalent Part Numbers

• Emerson EXV-N-35-404A
• Sporlan SEH-20-RA
• Alco EX8-04-R22

Frequently Asked Questions

• What refrigerants can be used with the Danfoss 034G2851 valve?
  This valve supports a wide range including R22, R134a, R404A, R407 series, R410A, and newer low-GWP refrigerants like R1234ze(E).
• What is the rated cooling capacity?
  It provides up to 40.4 kW (11.4 tons) with R22 under standard conditions, making it ideal for high-capacity systems.
• Is the valve suitable for bi-flow applications?
  Yes, the 034G2851 is designed for bi-directional refrigerant flow with balanced port operation.
• What are the electrical specifications?
  It operates with a bi-polar step motor at 11.5V to 13.8V DC, using an M12 4-pin male connector.