BURKERT Type 2103 externally controlled diaphragm valve consists of a pneumatically operated piston actuator, a diaphragm, and a 2-way valve body. The actuator features a stainless steel housing for use in hygienic or aggressive ambient conditions. The flow-efficient valve bodies with little dead space enable high flow rates. The actuator has a compact, autoclavable design with gap-free seals. Integration of automation units Type ELEMENT is possible in all configuration levels, and an explosion-proof ATEX/IECEx device variant is available.

General Technical Data

Feature	Specification
Valve body material	Stainless steel 1.4435, 316L, PVC-C, PVC-U, PP, PVDF
Diaphragm material	EPDM, PTFE/EPDM, Advanced PTFE/EPDM, GYLON/EPDM
Actuator material	PPS (DN 08...65), Stainless steel 1.4308 (DN 65...100)
Maximum pilot pressure	10 bar (7 bar for actuator size 130, 225)
Medium temperature (EPDM)	-10...+143 °C (steam sterilisation +150 °C for 60 min)
Ambient temperature	-10...+60 °C (autoclavable)

Control Functions

• Control function A (CF A): Pneumatically operated 2/2-way on/off valve, bidirectional, normally closed by spring force.
• Control function B (CF B): Pneumatically operated 2/2-way on/off valve, bidirectional, normally opened by spring force.
• Control function I (CF I): Pneumatically operated 2/2-way on/off valve on either side, bidirectional, switching position dependent on external control.

Approvals and Conformities

• Explosion protection: ATEX (EPS 18 ATEX 2 008 X II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db), IECEx (IECEx EPS 18.0007X).
• Hygiene: 3-A Sanitary Standards Inc., FDA Code of Federal Regulations, USP Class VI, EC Regulation 1935/2004.

Explosion Hazard in ATEX Zones

If the device is used in potentially explosive areas (Zones 1/21 and 2/22), electrostatic discharge presents an explosion risk. Ground the actuator and valve body. If using a plastic valve body, ground the actuator separately. Only use media with conductivity ≤100 pS/m if flow velocity exceeds 1 m/s.

Operating Conditions

When using a pilot valve or a control unit mounted on the actuator, observe their permissible temperature ranges.

Pressure Limits

If the device bursts, escaping media may cause injuries. Observe the maximum permissible operating pressure for the specific control function and seal material. For CF A with EPDM/FKM seals, the maximum dynamic operating pressure is up to 10 bar depending on actuator size.

Installation Notes

• The installation site must provide sufficient space for installation, disassembly, and maintenance.
• The device and relief bore must be accessible for inspection.
• For optimum self-draining, observe the specific self-draining angle (α) which depends on the valve body size and inner diameter of the port connection.