BURKERT 325950 (Type 2103) is an externally controlled 2/2-way diaphragm valve consisting of a pneumatically operated piston actuator, a PTFE/EPDM diaphragm, and a stainless steel valve body with ASME BPE clamp connections. The proven and robust PPS actuator ensures reliable use in hygienic or aggressive ambient conditions. The flow-efficient valve bodies with minimal dead space enable high flow rates and a wide range of possible uses. The actuator features a compact, autoclavable design with gap-free seals, making it highly suitable for the food, beverage, biotechnology, and pharmaceutical industries.

It is a compact, smooth-surfaced, and highly integrated system consisting of a valve and an automation unit with integrated pilot air ducts (no intake of ambient air). The valve offers IP65/67 and NEMA Type 4X protection degrees and displays high chemical resistance.

Product Overview

Item	Description	Item	Description
1	Transparent cap with position	2	Pilot air port 1 for CF A, CF B and CF I
3	Pilot air port 2 for CF I, exhaust port for CF A and CF B	4	Actuator cover
5	Actuator housing	6	Diaphragm bonnet
7	Diaphragm	8	Body screw
9	Valve body	10	Port connection

Control Functions

The Type 2103 series supports multiple control functions. Model 325950 is configured for Control Function A.

• 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

• 3-A Sanitary Standards Inc.: The products comply with 3-A Sanitary Standards Inc (3-A SSI) as per certificate.
• FDA: The diaphragms made of PTFE/EPDM comply with the Code of Federal Regulations published by the FDA.
• USP: The diaphragms are tested according to USP Class VI.
• EC Regulation 1935/2004: Suitable for use with food and beverages.

ATEX / 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 Ex h IIC T4…T2 Gb / Ex h IIIC T135 °C…T300 °C Db Only use devices that are approved for use in a potentially explosive atmosphere. Observe the additional instructions with Ex labelling.

Technical Data

Property	Value
Operating medium	Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums
Control medium	Neutral gases, air
Maximum pilot pressure	10 bar (7 bar for actuator size 130, 225)
Pilot air port	Push-in connector for outer diameter 6 mm or 1/4" (standard)
Ambient temperature	-10...+60 °C (autoclavable)
PTFE/EPDM Medium Temperature	-10...+130 °C (steam sterilisation +140 °C for 60 min)

Product Identification

Item	Description	Item	Description
1	Type	2	Control function
3	Diaphragm size / actuator size	4	Diaphragm material
5	Valve body material	6	Pilot pressure
7	CE marking	8	Manufacture code
9	Port connection main dimensions	10	Operating pressure
11	Permitted medium temperature	12	Permitted ambient temperature
13	Article number

Determination of Actuator Size

∅ A [mm]	Corresponds to actuator size
64.5	50 (D)
91	70 (M)
120	90 (N)
159	130 (P)
245	225 (L)

Installation and Self-Draining

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 (α) of the valve body must be observed. The marking for self-draining angles on the port connection serves as a guide and must point upwards.

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

Danger due to escaping medium

If the diaphragm is worn, medium can escape and seriously injure people. The relief bore must be regularly inspected for any medium leakages. If medium is leaking from the relief bore, replace the diaphragm immediately.