The Danfoss EV251B 032U538002 solenoid valve is a versatile 2/2-way valve with assisted lift, designed for a wide range of applications with water, oil, and compressed air. This valve, supplied in normally closed (NC) configuration, ensures reliable and precise control of liquid and gas flow in systems with low or fluctuating pressure, as well as where there is zero differential pressure.

Functional from 0 bar

Reliable operation even at zero differential pressure, ideal for closed and low-pressure systems.

Clip-on coil system

Innovative system for quick, safe, and easy coil installation and removal without tools.

Resistance to dirt

Built-in self-cleaning filter protects the pilot system of the valve, minimizing maintenance requirements.

High resistance to water hammer

Optimized diaphragm design reduces water hammer to as low as 1.5 bar, extending system life and reducing noise.

Technical Specifications:

• Type: Solenoid valve, 2/2-way, with assisted lift
• Function: Normally closed (NC)
• Connection: G 3/8" (ISO 228/1)
• Nominal size: DN 10 mm
• Flow coefficient (Kvs): 1.5 m³/h
• Valve body material: Brass
• Seal material: NBR
• Operating pressure range: 0 - 10 bar (differential pressure)
• Maximum test pressure: 15 bar
• Media temperature: -10 °C to +90 °C
• Ambient temperature: Max. +50 °C (for 24VDC coil), Max. +80 °C (for 230V/50Hz coil)
• Media viscosity: Max. 50 cSt
• Supply voltage: 24V DC
• Power consumption: 18 W (for 24V DC)
• Coil protection: IP65 (depending on coil)
• Opening time (water): Approx. 50 ms
• Closing time (water): Approx. 300 ms

Applications:

• Water (technical, potable – recommended to adhere to hardness and conductivity values)
• Oil (up to 50 cSt)
• Compressed air
• Other neutral liquid and gaseous media
• Closed systems with low and fluctuating pressure
• Open systems with differential pressure up to 0 bar
• Industrial heating systems
• Safety systems (e.g., water shut-off)

Construction and Function:

• Valve body: Brass
• Armature, armature tube, armature stop, spring: Stainless steel
• O-ring: FKM (some versions without O-ring)
• Diaphragm: NBR
• NC function: When the coil voltage is disconnected, the plunger is pressed down, pressure accumulates above the diaphragm, and the valve closes. When voltage is applied, the armature lifts, pressure above the diaphragm drops, and the valve opens.

The Danfoss EV251B is a cost-effective solution for everyday industrial applications, offering high reliability and long service life due to its robust construction and innovative features such as water hammer damping and resistance to dirt. It is an ideal choice for those seeking trouble-free operation even in demanding conditions.