Burkert Type 2103 (SKU 321032) is an externally controlled 2/2-way diaphragm valve consisting of a pneumatically operated piston actuator, a diaphragm, and a 2-way valve body. The proven and robust actuator with a stainless steel housing ensures use in hygienic or aggressive ambient conditions. The flow-efficient valve bodies with little dead space enable high flow rates and a wide range of possible uses. The actuator has a compact, autoclavable design with a large stainless steel housing and gap-free seals. The integration of automation units Type ELEMENT is possible in all configuration levels; a fieldbus interface can also be integrated. An explosion-proof ATEX/IECEx device variant is available.

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 the degrees of protection IP65/67 and NEMA Type 4X and displays high chemical resistance.

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 Ex h IIC T4…T2 Gb / Ex h IIIC T135 °C…T300 °C Db.
• 3-A Sanitary Standards Inc.: The products comply with 3-A Sanitary Standards Inc (3-A SSI) as per certificate (valid for variable code PE05).
• FDA: The diaphragms made of EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU) and laminate of GYLON® and EPDM (ER) 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.

Materials and Specifications

• Forged steel valve body (VS): Forged stainless steel 1.4435 in accordance with BN2 DIN EN 1022-5, F316L in accordance with ASTM, A182/A182M and 316L in accordance with ASME BPE.
• Actuator: DN 08...65, PPS; DN 65...100, stainless steel 1.4308.
• Actuator casing: DN 08...65, stainless steel 1.4561 (316Ti); DN 65...100, stainless steel 1.4308.
• Diaphragm: EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER).

Permissible Temperatures

Diaphragm material	Medium temperature [°C]	Comments
EPDM (AD)	-10...+143	Steam sterilisation max. +150°C for 60 min
FKM (FF)	0...+130	No steam, dry heat max +150°C for 60 min
PTFE (EA)	-10...+130	Steam sterilisation max. +140°C for 60 min
Advanced PTFE (EU)	-5...+143	Steam sterilisation max. +150°C for 60 min
GYLON® (ER)	-5...+130	Steam sterilisation max. +140°C for 60 min

Dimensions

Actuator

Diaphragm size	Actuator size ∅	∅ A	H	HS with 8691/8695	HS with 8690/8697	H+M
8	50 (D)	65	119	207	194	141
15	50 (D)	65	132	220	206	146
15	70 (M)	92	147	242	209	165
20	70 (M)	92	153	248	215	165
25	70 (M)	92	154	248	215	171
25	90 (N)	120	187	282	249	204
32	90 (N)	120	202	297	264	215
40	90 (N)	120	206	300	268	221
40	130 (P)	159	259	353	320	273
50	130 (P)	159	275	369	336	281

Forged Steel Valve Body (VS) with Welded Connection

Diaphragm size	Port connection DN	∅ D1	s	L	h	H	Product key
DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B
8	8	13.5	1.6	90	9.3	18.8	SA40
15	8	13.5	1.6	108	8.2	19.9	SA40
8	10	17.2	1.6	90	9.3	18.8	SA41
15	10	17.2	1.6	110	12.1	23.8	SA41
15	15	21.3	1.6	110	12.1	23.8	SA42
20	15	21.3	1.6	119	16.0	30.3	SA42
20	20	26.9	1.6	119	16.0	30.3	SA43
25	20	26.9	1.6	119	19.0	37.0	SA43
25	25	33.7	2	129	19.0	37.0	SA44

Additional Dimension Tables

Due to the extensive range of connection variants (Clamp, Threaded, Flange, True Union) across multiple standards (ASME BPE, SMS, BS, JIS) and materials (Cast, Tube, Plastic), please refer to the full manufacturer datasheet for exhaustive dimension tables beyond the primary forged steel welded configuration.

Performance Specifications

Flow Characteristics (Forged Steel Valve Body)

Diaphragm size	Port connection DN	Actuator size ∅	Diaphragm material	Kvs value [m3/h]
DIN 11850-2 / DIN 11866 series A / DIN EN 10357 series A
8	10	50 (D)	EPDM	1.5
8	10	50 (D)	PTFE	1.9
15	15	70 (M)	EPDM	6.5
15	15	70 (M)	PTFE	6.0
20	20	70 (M)	EPDM	12.4
20	20	70 (M)	PTFE	12.0
25	25	70 (M), 90 (N)	EPDM	20.0
25	25	70 (M), 90 (N)	PTFE	17.0

Medium Pressure (Control Function A)

Diaphragm size	Actuator size ∅	Pilot pressure [bar]	Maximum static operating pressure (EPDM, FKM) [bar]	Maximum static operating pressure (PTFE, GYLON) [bar]
8	50 (D)	3.7...10	10	10
15	50 (D)	5.0...10	10	-
15	70 (M)	4.8...10	10	10
20	70 (M)	4.8...10	10	10
25	70 (M)	4.8...10	10	6
25	90 (N)	5.0...10	10	10

Risk of bursting due to overpressure

If the device bursts, escaping media may cause injuries, burns or scalds. Observe the values indicated on the type label. Valves with reduced spring force require reduced pilot pressure.

Product Accessories and Automation

The Type 2103 can be combined with various Bürkert control units for decentralised automation:

• Type 8691 / 8695: Control heads for decentralised automation of ELEMENT process valves.
• Type 8690 / 8697: Pneumatic control units / position feedback.
• Type 8692 / 8694 / 8696: Digital electropneumatic positioners for integrated mounting.
• Type 8693: Digital electropneumatic process controller.
• Type 8792 / 8793: SideControl Remote positioners and process controllers.

Safety and Installation Notes

Ensuring Self-Draining

The installer and the operator are responsible for ensuring self-draining. The inclination angle should correspond to the inclination angle of the pipeline. For pipelines, the inclination angles specified in the valid ASME BPE standard are recommended. The marking for self-draining angles on the port connection serves as a guide and must point upwards.

Explosion Hazard in ATEX Zones

If the device is used in a potentially explosive area (Zones 1/21 and 2/22), appropriate measures must be taken to ensure that static electricity cannot accumulate. The actuator and valve body must be grounded. If a plastic valve body is used, ground the actuator separately. Only use media with a conductivity ≤100 pS/m if there are no flow velocities >1 m/s or if dry running is prevented by special monitoring.