Danfoss EVO 103 Solenoid Valve with BB230AS Coil 230V (032L2070)

Danfoss EVO 103 (032L2070) is a servo-operated solenoid valve, normally closed (NC), supplied as a complete assembly with BB230AS 230 V / 50 Hz coil and DIN connector (IP65). Designed for liquid, suction and hot gas lines in professional refrigeration, freezing and industrial air conditioning systems. Handles a wide range of refrigerants – both synthetic (HFC/HFO) and natural flammable (R290, R600a, R1234yf).

Key Features and Benefits

• Complete assembly ready for installation: valve supplied with BB230AS coil and DIN connector – no need to order coil separately, which shortens preparation time and eliminates the risk of selecting incompatible accessories.
• Servo operation for high flow rates: floating diaphragm principle allows control of large main orifice with minimal coil power (10 W) – energy savings at high Kv 2.2 m3/h.
• Extended brazing ends: no need to disassemble the valve during connection brazing – significant time savings on-site and elimination of risk of internal damage from overheating.
• Full compatibility with flammable refrigerants: valve validated per ISO 5149 and IEC 60335 for R290, R600a, R1234yf and other A2L/A3 class refrigerants – ready for use in "natural" refrigerant systems without additional modifications.
• Wide range of pressures and temperatures: max. operating pressure 45.2 bar, medium temperature from –40 to +105 °C (up to 130 °C during hot gas defrost) – operation on hot gas line without restrictions.
• IP65 protection rating with DIN connector mounted: resistance to moisture and dust – ideal for refrigerated rooms, freezing chambers and outdoor equipment.
• Manual override capability: using a magnetic tester (018F0091) the valve can be opened or closed without power supply – useful during system startup and maintenance.

Technical Data

Nominal Capacities EVO 103 – Selected Refrigerants

Capacities determined at: t_e = –10 °C, t_l = 25 °C, 916;p = 0.15 bar (liquid and suction); t_c = 40 °C, 916;p = 0.8 bar, t_h = 65 °C, 916;t_sub = 4 K (hot gas).

For other refrigerants and operating conditions, use the Coolselector®2 tool available on the Danfoss website.

Operating Principle – Servo (EVO 102 / EVO 103)

EVO 103 operates in a servo-controlled system with floating diaphragm. In the de-energized state, the pilot orifice and main orifice are closed by spring force and pressure difference. When voltage is applied, the armature opens the pilot orifice, which equalizes pressure above the diaphragm with the outlet side – the pressure difference between inlet and outlet opens the main orifice for full flow. The minimum required pressure difference for opening is 0.03 bar. When the coil is de-energized, the pilot orifice closes, pressure above the diaphragm equalizes with the inlet and the diaphragm closes the main orifice.

Available EVO Series Versions

Applications

• Liquid line – shutoff of condenser or evaporator supply at system shutdown
• Suction line – vapor flow control in multi-compressor systems
• Hot gas line – hot gas defrost and bypass regulation
• Systems with natural refrigerants: propane (R290), isobutane (R600a), propane/butane
• Commercial refrigeration, freezing, industrial air conditioning and heat pumps

FAQ – Frequently Asked Questions

Are the coil and DIN connector included with the valve?

Yes. Code 032L2070 is a complete valve supplied with BB230AS coil (230 V / 50 Hz, 10 W, code 018F7351) and DIN 43650-A PG 11 connector (code 042N0156). No need to order the coil separately.

What is the difference between EVO 103 and EVO 102?

Both valves operate in a servo system with floating diaphragm. The difference lies in the orifice size and flow coefficient: EVO 102 has Kv = 1.0 m3/h (connection 10 or 12 mm), while EVO 103 has Kv = 2.2 m3/h – almost twice higher flow, designed for larger capacity refrigeration systems.

What is the minimum pressure difference required for EVO 103 to open?

EVO 103, being a servo-operated valve, requires a minimum pressure difference of 916;p = 0.03 bar between inlet and outlet to open and maintain the main orifice in the open position. The maximum allowable pressure difference (MOPD) is 38 bar.

Is EVO 103 032L2070 suitable for operation with R290?

Yes. The valve is validated for R290 (propane) according to ISO 5149 and IEC 60335 standards. The manufacturer has assessed the ignition risk and confirmed approval for use with this refrigerant. However, the detailed Danfoss guidelines for installations with flammable refrigerants must be observed.

What pipe sizes does the EVO 103 032L2070 valve handle?

The 032L2070 version has a brazed connection 12 mm. For 16 mm / ? in diameter, version 032L2071 is available with the same Kv = 2.2 m3/h.

Can the valve be opened manually without power supply?

Yes. After removing the coil, the valve can be manually forced open or closed using a Danfoss solenoid valve tester (permanent magnet, code 018F0091). This is useful during system startup and maintenance diagnostics.

What is the maximum operating temperature on the hot gas line?

The medium temperature can be maximum 105 °C during normal operation. During hot gas defrost, the allowable medium temperature is 130 °C. The coil ambient temperature should not exceed 80 °C.