Page 99 - Bürkert

2/2- and 3/2-way Solenoid Valve for analytical applications

6628 TwinPower

• 22 mm Installation width
2 (A)
• Isolating diaphragm for aggressive
fluids 1 (P)
• High back-pressure tightness 2 (A)

• Minimal internal volume with good 1 (P)
cleanability 2(A)

1(P) 3(R)

Direct acting medium separated 2/2- and 3/2-way Rocker Solenoid Dimensions [mm] (see datasheet for further Details)
Valve for control of aggressive fluids and gases in analytical medical

applications, the food industry, and also the chemical industry for dosing,
filling, mixing and distribution.

The medium is in contact with fluid housing and seal material solely
through the isolating diaphragm. This valve with the new TwinPower
actuator, robust screw-in connection and 22 mm installation width, will
fulfil the highest requirements. The established rocker solenoid technol-
ogy is characterized through full back pressure tightness, good rinsing
capability and low internal volume. Type 6628 is available in different
technical versions and by virtue of several body options, it offers a perfect
adaption in fluid applications.

Technical data C
Orifice DN2.0 or 3.0 mm
Body material PEEK or PPS (PVDF, PP on request)
Seal material FFKM, FKM or EPDM
Medium Resistant to neutral and aggressive gases and
liquids acc. to our chemical resistance chart A
Medium temperature
FKM, EPDM, FFKM 0 °C to +55 °C B
+10 °C to +55 °C
–10 °C to +55 °C A B C
Ambient temperature 45.8 16 59.9
FKM, EPDM, FFKM 0 °C to +55 °C
+10 °C to +55 °C
–10 °C to +55 °C
Internal volume ca. 200 µl
Viscosity max. ca. 21 mm²/s
Electrical connection • PFA single flying leads, 0.5 mm², 500 mm Technical data (continued)
• Rectangular plug for cable plug Type 2505 (not Protection class IP54 (IP40 with rectangular plug Type 2505)
included) Response times Measurement at valve output with 2 bar and 20 °C
• Industry plug acc. to DIN 43650 Form B for acc. to DIN ISO 12238:2001
cable plug Type 2507 (not included) Opening 25 ms (Pressure rise 0-10%)
• Circular connector M8 on request Closing 25 ms (Pressure drop 100-90%)
Operating voltages 24V DC, other voltages on request Manual override on request
Voltage tolerance ±10%
Nominal power 5 W
Duty cycle 100 % continuous operation
Installation As required, preferably with actuator upright

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