Burkert Type 2031 (SKU 558801) is an externally controlled 2/2-way diaphragm valve with a pneumatic piston actuator and diaphragm seal. It uses neutral gases or air to control the flow of media and is self-draining when in the appropriate installation position. The proven and robust actuator with a stainless steel valve body ensures reliable operation in hygienic or aggressive environments. The flow-optimised valve body with minimal dead space enables high volume flow rates and a wide range of possible applications.

Product Overview

Item	Description	Item	Description
1	Transparent cap with position indicator	2	Actuator cover
3	Upper pilot air port (for CF A and CF I)	4	Lower pilot air port (for CF A and CF I)
5	Diaphragm bonnet	6	Diaphragm
7	Body screw	8	Port connection
9	Valve body

Technical Data

• Operating Pressure: 0 to 10 bar
• Medium Temperature: -10 °C to +130 °C (PTFE diaphragm)
• Ambient Temperature: +5 °C to +140 °C (PPS actuator)
• Control Medium: Neutral gases, air
• Pilot Pressure: 5 to 7 bar (for Control Function A)
• Kv Value (Water): 5.3 m³/h

Approvals

This device is ATEX and IECEx certified (II 2 D Ex h IIIC T135°C...T300°C Db, II 2 G Ex h IIC T4...T2 Gb). It is also CIP and SIP capable.

Installation

Ensuring Self-Draining

The installer and the operator are responsible for ensuring self-draining. For optimum self-draining, the inclination angle of the pipeline and the self-draining angle of the valve body must be observed.

• β: Inclination angle of the pipeline (recommended as per ASME BPE).
• α: Self-draining angle (depends on valve body size and inner diameter).
• 1: Marking for self-draining (must point upwards).

Welding into the Pipeline

Damage to the diaphragm or the actuator

The diaphragm and actuator can be damaged when welding or bonding the valve body into the pipeline. Remove the actuator and diaphragm from the valve body before installation.

1. Clamp the valve body in a holding device.
2. For Control Function A: Pressurise the lower pilot air port with compressed air to detach the diaphragm without damage from the body.
3. Loosen the body screws crosswise and remove the actuator and diaphragm from the valve body.
4. Weld the valve body into the pipeline.
5. After welding the surface of the valve body, smooth by sanding if necessary and clean carefully.

Compressor Alignment

Risk of crushing

If the compressor is not positioned correctly and the actuator is actuated, this may result in injuries and damage to the device. Before actuating the actuator, ensure that the compressor is in the correct position.