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6281EV Servo-Assisted 2/2-Way Diaphragm Valve
Brand: Burkert Fluid Control Systems
The 6281 valve is a servo-assisted solenoid valve of the S.EV series. A minimum differential pressure is always required for the proper function of the valve. Various diaphragm material combinations and methods of operation are available depending on the application.
The standard brass housing satisfies all European drinking water requirements. Dezincification-resistant brass is available for other markets. The housing offering is rounded out by a stainless steel version.
The solenoid coils are moulded with a chemically resistant epoxy. For reduced energy requirement, all coils can be delivered with electronic power reduction.
The valve can be equipped with manual override for easy maintenance and commissioning.
In combination with a plug in accordance with DIN EN 17301-803 Form A, the valves satisfy protection class IP65 - in combination with a stainless steel housing NEMA 4X.
Features:
- Servo-assisted diaphragm with diameter of up to DN 50
- Vibration-proof, central screwed coil system
- Damped design for quiet closing
- Moulded housing with high surface quality
- Service-friendly manual override
Specifications
Ambient Temperature Range
- Maximum
Approvals & Certifications
- European Gas Approval EPDM with KTW W270
- IECEx PTB 14.0049 x Ex Mb IIC T4 Gb Ex Mb IIIC T130° C (266° F) Db (Explosion-proofed), IECEx EPS 16.0021 x Ex Eb Mb IIC T4 Gb Ex Mb Tb IIIC T130° C (266° F) Db (Coil & Junction Box)
- PTB 14-ATEX-2023 x II 2 G Ex Mb IIC T4 Gb II 2D Ex Mb IIIC T130° C (266° F) Db (Explosion-proofed), EPS 16-ATEX-1046 x II 2 G Ex Eb Mb IIC T4 Gb II 2D Ex Mb Tb IIIC T130° C (266° F) Db (Coil & Junction Box)
- VDE Mark Approval According to DIN EN 60730
BSP Connection
- G 1" Female
- G 1/2" Female
- G 1-1/2" Female
- G 1-1/4" Female
- G 2" Female
- G 2-1/2" Female
- G 3/4" Female
- G 3/8" Female
- 1" BSPT Female
- 1/2" BSPT Female
- 1-1/2" BSPT Female
- 1-1/4" BSPT Female
- 2" BSPT Female
- 3/4" BSPT Female
Consumption
- Power Consumption (DC Hot/Cold Coil): 9 W - Ex Coil (with Internal Rectifier) Circuit Function A & B
- Power Consumption (Hold with Coil AC): 14 / 8 VA / W - Circuit Function A
- Power Consumption (Hold with Coil AC): 16 / 7 VA / W - Circuit Function B
- Power Consumption (Hold with Coil DC): 8/9.5 W (Hot/Cold Coil) - Circuit Function A & B
- Power Consumption (Inrush AC): 24 VA - Circuit Function A & B
- Power Consumption (Inrush, Hold with Coil AC): 9 VA / W - Ex Coil (with Internal Rectifier) Circuit Function A & B
Diaphragm Material
- Diaphragm Holder (PPSGF40, DN50): Brass
- Diaphragm Holder (PPSGF40, DN50): Stainless Steel
- EPDM
- FKM
- NBR
Duty Cycle
- 100% Continuous Rating
Electrical Connectors
- Tag Connector According to DIN EN 175301-803 Form A for Cable Plug Typical 2508
Electrical Contacts
- Normally Closed
- Normally Open
Enclosure, Body Material
- 316 Stainless Steel - ASTM A351 CF8M, 1.4408
- Brass According to DIN EN 50930-6
Environmental Protection
- IP65 with Junction Box, Cable Plug & Cable Connection
- IP66
- NEMA 4X
- Vibration-Proof
Flow Rate
- Water: 3.8 to 40 Kv (m³/hour)
Insulation
- Epoxy: Coil Isolation Class H
- Polyamide: Coil Isolation Class B
Internal Part Material
- Valve: Brass
- Valve: Plastic (PPS)
- Valve: Stainless Steel
Materials of Construction
- Coil: Epoxy with FKM Seal
- Coil: Polyamide with NBR, EPDM Seal
- Stopper, Magnetic Core: 434 Stainless Steel
Mounting Position
- Preferably with Actuator Upright
NPT Connection
- 1" NPT Female
- 1/2" NPT Female
- 1-1/2" NPT Female
- 1-1/4" NPT Female
- 2" NPT Female
- 2-1/2" NPT Female
- 3/4" NPT Female
O-Ring Material
- EPDM
- FKM
- NBR
Orifice Size
- 0.511" to 1.968" (13 to 50 mm)
Override
- Manual Override
Pressure Range
- psi: 2.901 to 232.1 (kPa: 20 to 1,600, bar: 0.2 to 16)
Process Temperature
- EPDM: -30° to 90° C (-22° to 194° F) [with Epoxy Coil to 100° C (212° F)]
- FKM: 0° to 90° C (32° to 194° F) [(with Epoxy Coil to 120° C (248° F)]
- NBR: -10° to 80° C (14° to 176° F)
Response Time
- 0.1 to 4 seconds (Depending on Orifice & Differential Pressure)
Ring Material
- Short Circuit Ring: Copper (Cu) with Brass Body
- Short Circuit Ring: Silver (Ag) with Stainless Steel Body
Seat / Seal Material
- Armature Seal: EPDM (Media: Oil & Fat-Free Fluids, Hot Water, Aceton, Aqueous Alkali Solution)
- Armature Seal: FKM (Media: Hot Air, Per-Solution)
- Armature Seal: NBR (Media: Neutral Fluids, Compressed Air, Water)
Solenoid Type
- 2/2-Way
Spring Material
- 301 Stainless Steel, 1.4310
Tolerance
- Voltage Tolerance: ± 10%
Voltage
- 230 V / 50/60 Hz / UC
- 24 V / 50/60 Hz / UC
- 24 Vdc
