Page 49 - Bürkert

2/2-way Proportional Valve

2873 G 1/8” and G 1/4”, DN0.8-4.0 mm

• Excellent range
• Very good repeatability
• Compact Design

2 (A)

1 (P)

The direct-acting solenoid control valve, Type 2873 ,(32 mm installation Dimensions [mm] (see datasheet for further Details)
width) is used as the regulating unit in control loops. Due to an elas-
tomeric seat seal the valve closes tight, up to the DN specific nominal
pressure.
The operation lever of the valve is suspended frictionless, which leads
to an extraordinary adjustment characteristic. Valve control takes place
through a PWM signal (see control electronics, Type 8605).
C
Technical data

Body material Brass, stainless steel
Medium Neutral gases, liquids on request
Span 1 : 200
Response sensitivity 0.25% of full scale
Rotation time <20 ms A
PWM frequency 1200 Hz B
Medium temperature -10 °C to 90 °C
Ambient temperature Max. 55 °C
Size A B C
Seal material FKM G 1/8” 32 32 57
Operating voltages 24 V DC G 1/4” 32 46 69.5
Power consumption 9 W
Max. coil current 1) 420 mA
Duty cycle 100 % continuously rated
Electrical connection Cable Plug Type 2508 acc. to DIN EN 175301-
803 Form A (previously DIN 43650)
(not included)
Typical control data 2)
at PWM control
Hysteresis <5 %
Repeatability < 0.5 % F.S. 3)
Protection class IP65 (with cable plug)
1) Maximum value, value depends on operating pressure
2) Characteristic data of control behaviour depends on process conditions
3) by flow measurement

Options/Accessories
• Seal material EPDM
• 12V coil
• Oxygen versions
• Parts oil-, fat- and silicon free
• Flange

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