Type 3281

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1.

General technical data

1.1. General

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 6.

Material

Further information can be found in chapter “3.2. Material specifications” on page 5.

Valve body

Stainless steel

Seal

PTFE

Design

Globe control valve

Connection nominal diameter

DN 15, NPS ½

Safety setting in case of power

failure

With capacitive buffer module as accessory, see chapter “4.5. Capacitive buffer module” on page

10.

Flow direction

Against closing direction (below seat)

Controller variant

Position controller or process controller

Weight

~1.1 kg

Status indicator

LED (Refer to the operating instructions for more information.)

LED (Refer to the operating instructions Type 3281  for more information.)

Performance data

Typical values of positioning behaviour1.)

Dead band of the position

control

± 0.5 % (corresponds to setting range 1:100)

Closing time

2.5 s

Operating pressure

0…16 bar(g) (depending on seat size, see chapter “6.2. Pressure range” on page 12)

Nominal pressure

PN 25 (DIN EN 1333)

K

VS value

0.57…2.25 m³/h (see chapter “6.2. Pressure range” on page 12)

Seat leakage (DIN EN 60534 - 4)

Class VI

Electrical data

Operating voltage

24 V DC ± 10 % (max. residual ripple 10 %)

Duty cycle

Up to 100 % (depending on medium and ambient temperature)

Power consumption

< 1 W holding power

Max. 12 W (short term 20 W)

Medium data

Operating medium

Neutral gases, liquids

Medium temperature

- 20 °C…130 °C

Viscosity

Max. 600 mm²/s (cSt)

Process/Port connection & communication

Port connection2.)

• Threaded connection

– G (EN ISO 228 - 1)

– Rc (EN ISO 228 - 1, ISO 7/1 / DIN EN 10226 - 2)

– NPT (ASME B 1.20.1)

• Welded connection

– DIN EN ISO 1127/ISO 4200/DIN 11866 B

– DIN 11850 2/DIN 11866 A/DIN EN 10357 A

Communication and control

Standard signal (analogue)

Setpoint: 0/4…20 mA, 0…5/10 V and digital input, see chapter “1.2. Electrical control and inter-

faces” on page 4.

Fieldbus (digital)

• Bürkert system bus (büS)

• CANopen (optional)

EDIP

Field device for integration into the EDIP platform via Bürkert system bus (büS)

Further information can be found in chapter “8.2. Bürkert Communicator Software” on page 15.

Approvals and conformities

Degree of protection

IP54

Foods and beverages/Hygiene

Further information can be found in chapter “2.4. Foods and beverages/Hygiene” on page 4.