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3285 2/2-Way Proportional Valve
Brand: Burkert Fluid Control Systems
The direct-acting proportional valve of Type 3285 is used for dosing of liquids and gases in closed or open control loops.
The valve features a stepper motor as the actuator. The integrated electronics simplifies the process integration; additional actuation modules are not necessary.
The motor’s power consumption to hold a specific opening position of the valve is zero. This key feature can reduce the energy consumption of a plant dramatically and thus make it more efficient.
Type 3285 is available as a standard ON/OFF or proportional valve, as a version with integrated positioner and as a version with integrated process controller.
Specifications
Ambient Temperature Range
- -10° to 60° C (14° to 140° F)
Applications
- Flow
Approvals & Certifications
- cULus
- UR
BSP Connection
- G 1” Female
- G 1/2” Female
- G 3/4” Female
Communication
- FOUNDATION Fieldbus
Consumption
- Power: < 1 W (Holding Position)
- Power: 12 W, Max.
Cover Material
- Fluid: Polyphenylene Sulfide (PPS)
Disc Material
- Control, Fixed Seat: Technical Ceramic
Duty Cycle
- 100 % Duty Cycle - Depending on Fluid & Ambient Temperature
Electrical Connectors
- M12 Plug (A-Coded, 8-Pin)
- Process Controller: M12 Socket (A-Coded, 5-Pin)
Enclosure, Body Material
- Fluidic: Brass
- Fluidic: Stainless Steel
- Polycarbonate (PC)
- Polyphenylene Sulfide (PPS)
Environmental Protection
- IP50
Flow Rate
- 1.8 to 9.6 m³/hour (Kvs) - Water
Frequency
- Extension Sensor Input (Process Controller Digital): 5 to 2,000 Hz
Hysteresis
- < 5 %
Indication
- Status Display: LED
Input
- Positioner Analog, Process Controller Analog (Setpoint): 0-20 mA
- Proportional Valve (Setpoint): 800 Hz (PWM)
- Proportional Valve, Positioner Analog, Process Controller Analog (Setpoint): 0-10 V
- Proportional Valve, Positioner Analog, Process Controller Analog (Setpoint): 4-20 mA
- Standard ON/OFF (Setpoint): 10-30 V (Log 1, Valve Open)
- Standard ON/OFF, Positioner Analog, Process Controller Analog (Setpoint): 0-5 V (Log 0, Valve Closed)
Input Impedance
- Analog Input (Proportional Valve, Positioner Analog, Process Controller): 60 ohms (Current)
- Analog Input (Standard ON/OFF, Proportional Valve, Positioner Analog, Process Controller): 22 kiloohms (Voltage)
Interface Connection
- CAN
Media
- Liquids
- Neutral Gas
Mounting Position
- Preferably with Actuator Upright
Nominal Pressure
- psig: 87 (kPa: 600, bar: 6)
NPT Connection
- 1” NPT Female
- 1/2” NPT Female
- 3/4” NPT Female
O-Ring Material
- FKM
- NBR
Operation
- Electrical Operation
- Manual Operation
Orifice Size
- 0.31” to 0.98” (8 to 25 mm)
Output
- Digital Current Limit (Standard ON/OFF, Proportional Valve): 100 mA - Max.
- Positioner Analog, Process Controller Analog: 0-20 / 4-20 mA - (560 ohms, Max.)
- Positioner Analog, Process Controller Analog: 0-5 / 0-10 V - (10 mA - Max.)
Power Supply
- 24 Vdc ± 10 %, Max.
Pressure Range
- psi: 0 to 90 (kPa: 0 to 600, bar: 0 to 6)
Process Temperature
- Fluid: 0° to 70° C (32° to 158° F)
Ratio
- Span - 1:100
Repeatability
- < 1 % of Full Scale
Response Time
- Closure Time: 4 seconds
Seat / Seal Material
- Seal: EPDM
- Seal: FKM
- Seal: NBR
- Technical Ceramic
Sensitivity
- < 1 % of Full Scale
Shaft Material
- Actuator: Stainless Steel
Shaft Seal Material
- Actuator: FKM
- Actuator: NBR
Spring Material
- Stainless Steel
