BURKERT 348199 Type 2031 is an externally controlled 2/2-way diaphragm valve with a pneumatic PA (polyamide) piston actuator and an EPDM diaphragm seal. It uses neutral gases or air to control the flow of media. The valve features a stainless steel tube body (1.4435-BN2 / 316L) with a G1/2 threaded port and a 15mm orifice. It is designed for control function B (opened by spring force) and is self-draining when installed in the appropriate 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	2	Actuator cover
3	Upper pilot air port	4	Lower pilot air port
5	Diaphragm bonnet	6	Diaphragm
7	Body screw	8	Port connection
9	Valve body

Product Identification

Type Label

Item	Description	Item	Description
1	Type	2	Control function
3	Diaphragm size	4	Diaphragm material
5	Valve body material	6	Operating pressure
7	Pilot pressure	8	CE marking
9	Manufacture code	10	Article number
11	Serial number	12	Port connection

Labelling on Tube Valve Body

Item	Description	Item	Description
1	Manufacturer	2	Heat number
3	Nominal diameter and pipe dimensions	4	Self-draining angle
5	Marking for self-draining angle	6	Production number and serial number
7	Pressure level	8	Material

Functionality

Control function B (CF B): Pneumatically operated 2/2-way on/off valve. Bidirectional. Opened by spring force in rest position.

Depending on the control function, pneumatic pilot pressure generates the closing force. A spindle connected to the actuator piston transfers the force to the compressor, which presses the diaphragm against the weir in the valve body.

Operating Conditions

• Operating medium: Neutral gases and liquids, ultrapure, sterile, aggressive or abrasive media.
• Control medium: Neutral gases, air.
• Permissible ambient temperature (PA actuator ≤125 mm): -10...+60 °C.
• Medium temperature (EPDM diaphragm): -10...+143 °C (Steam sterilisation max. +150°C for 60 min). Note: The specific SKU 348199 limits medium temperature to 100°C.
• Maximum pilot pressure: 10 bar.

Pressure Limits

Do not exceed the maximum permissible pilot pressure or maximum permissible operating pressure. Observe specifications on the type label. Excessively high pressure or temperatures may damage the device and cause leaks.

Installation and Self-Draining

Any installation position is possible, preferably with the actuator facing up.

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 for the valve body must be observed.

• β: Inclination angle of the pipeline
• α: Self-draining angle
• 1: Marking for self-draining

For leakage detection, one of the relief bores in the diaphragm bonnet for monitoring leakages must be at the lowest position.