What is the Burkert Type 2104 valve used for?

The Burkert Type 2104 is an externally controlled T-diaphragm valve with a pneumatic actuator designed for hygienic or aggressive ambient conditions. Its zero dead volume design makes it suitable for highly purified, sterile, aggressive, or abrasive mediums in the food, beverage, biotechnology, pharmaceutical, and cosmetics industries.

What are the available control functions for the Burkert 2104 pneumatic actuator?

The Burkert Type 2104 actuator is available in three control functions. Control function A (CF A) is normally closed by spring force, control function B (CF B) is normally opened by spring force, and control function I (CF I) is pneumatically operated on both sides with the switching position dependent on external control.

What are the maximum temperature limits for the diaphragms in the Type 2104 valve?

The maximum medium temperature depends on the diaphragm material selected. EPDM and Advanced PTFE/EPDM diaphragms can handle temperatures up to +143 °C, with steam sterilization up to +150 °C for 60 minutes. PTFE/EPDM and GYLON/EPDM diaphragms are rated up to +130 °C, with steam sterilization up to +140 °C for 60 minutes.

What materials are used for the valve body and actuator of the Burkert 2104?

The valve body is machined from stainless steel block material 1.4435 (DIN EN 10088) or 316L (ASTM A479 / ASME BPE). The actuator material varies by size, utilizing polyphenylene sulphide (PPS) for sizes DN 08 to DN 65, and stainless steel 1.4308 for sizes DN 65 to DN 100.

What hygienic and explosion-proof certifications does the Burkert 2104 hold?

The Burkert Type 2104 features ATEX/IECEx explosion protection for hazardous environments. For hygienic applications, the diaphragms comply with FDA regulations, USP Class VI, EC Regulation 1935/2004, and the products meet 3-A Sanitary Standards.

What is the maximum pilot pressure allowed for the pneumatic actuator?

The maximum pilot pressure for the Burkert Type 2104 pneumatic actuator is 10 bar. However, this limit is reduced to 7 bar for the larger actuator sizes 130 and 225.

What are the standard surface finish options for the valve body?

The standard internal surface quality is electrically polished to Ra ≤ 0.38 μm (ASME BPE SF4 / DIN HE4) or mechanically polished to Ra ≤ 0.5 μm (ASME BPE SF1). The external surface finish is standardized at Ra ≤ 1.6 μm.

BURKERT 20051139 2104 T-Diaphragm Valve with Pneumatic Actuator

Burkert Type 2104 externally controlled diaphragm valve consists of a pneumatically operated piston actuator, a diaphragm, and a T-valve body. The proven and robust actuator with a stainless steel housing ensures reliable use in hygienic or aggressive ambient conditions. The flow-efficient valve bodies with zero dead volume enable high flow rates and a wide range of possible uses in the food, beverage, biotechnology, pharmaceutical, and cosmetics industries.

The valve body and the diaphragm are available in all common materials and variants. 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 (can be retrofitted); a fieldbus interface can also be integrated. An explosion-proof ATEX/IECEx device variant is available.

Product Overview

BURKERT 20051139 Burkert 2104 product overview and anatomy of T-valve

No.	Component	No.	Component
1	Pilot air port 1 for CF A, CF B and CF I	2	Pilot air port 2 for CF I, exhaust port for CF A and CF B
3	Transparent cap with position	4	Actuator cover
5	Actuator housing	6	Relief bore
7	Diaphragm	8	Port connection
9	Valve body	10	Diaphragm bonnet
11	Body screw

General Technical Data

Product properties	Description
Block body (VH/VI)	Stainless steel block material 1.4435 according to DIN EN 10088 and 316L according to ASTM A479 / A479M / ASME BPE
Diaphragm	EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
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
Standard surface quality	Internally electrically polished: Ra ≤ 0.38 μm (ASME BPE SF4 / DIN HE4). Internally mechanically polished: Ra ≤ 0.5 μm (ASME BPE SF1). Externally Ra ≤ 1.6 μm
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), thread G 1/8"
Operating medium	Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums
Medium temperature	EPDM: -10 °C...+ 143 °C (steam sterilisation max. + 150 °C for 60 min) PTFE/EPDM: -10 °C...+ 130 °C (steam sterilisation max. + 140 °C for 60 min) Advanced PTFE/EPDM: -5 °C...+ 143 °C (steam sterilisation max. + 150 °C for 60 min) GYLON®/EPDM: -5 °C...+ 130 °C (steam sterilisation max. + 140 °C for 60 min)
Nominal diameter	DN 06...DN 100 (1/8"...4")
Ambient temperature	-10 °C...+ 60 °C (autoclavable)

Control Functions

Control Function	Description
Control function A (CF A)	Pneumatically operated T-valve. Normally closed by spring force.
Control function B (CF B)	Pneumatically operated T-valve. Normally opened by spring force.
Control function I (CF I)	Pneumatically operated T-valve on either side. Switching position dependent on external control.

Approvals and Conformities

ATEX / IECEx: EPS 18 ATEX 2 008 X II 2G Ex h IIC T4…T2 Gb / II 2D 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 the variable code PE05).
FDA: The diaphragms made of EPDM, PTFE/EPDM, Advanced PTFE/EPDM and laminate of GYLON® and 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: The diaphragms are suitable for use with food and beverages.
TA Luft: Technical instruction on air quality control (valid for the variable code PM01).

Materials

BURKERT 20051139 Burkert 2104 material specifications and components

No.	Element	Material
1	Ground terminal	Stainless steel 1.4301/1.4305 (only for ATEX/IECEx variant)
2	Transparent cap	Polysulfone PSU
3	Pilot air ports	Push-in connector PP (standard), Thread G 1/8" stainless steel 1.4305
4	Actuator	Polyphenylene sulphide PPS
5	Cover	Stainless steel 1.4561 (316Ti)
6	Piston seal	FKM
7	Diaphragm	EPDM (AD), PTFE/EPDM (EA), advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
8	Valve body	Stainless steel block material

BURKERT 20051139 Burkert 2104 material specifications for stainless steel actuator

No.	Element	Material
1	Transparent cover	Polysulfon PSU
2	Drive cover	Stainless steel 1.4308
3	Barrel liner	Stainless steel 1.4404
4	Piston seal	FKM
5	Nut	Stainless steel 1.4301
6	Diaphragm base	Stainless steel CF3M
7	Diaphragm	EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
8	Valve body	Stainless steel block material

Dimensions

Actuator

BURKERT 20051139 Burkert 2104 actuator dimensions with 360 degree rotatable interface

Diaphragm size	Actuator size ∅	∅ A	HS with 8691 / 8695	HS with 8690 / 8697	H+M (MT86)
8	50 (D)	65	232	219	138
15	50 (D)	65	240	226	146
15	70 (M)	92	262	229	166
20	70 (M)	92	262	229	166
25	70 (M)	92	268	235	172
25	90 (N)	120	301	269	205
32	90 (N)	120	313	280	217
40	90 (N)	120	317	285	221
40	130 (P)	160	370	337	274
50	130 (P)	160	379	346	282
65	130 (P)	160	383	350	287
65	225 (L)	245	427	395	330
80	225 (L)	245	433	401	336
100	225 (L)	245	429	397	332

T-Body with Welded Connection

BURKERT 20051139 Burkert 2104 T-Body with welded connection dimensions

(Dimensions vary extensively by standard such as DIN EN ISO 1127, ASME BPE, SMS 3008, and DIN 11850. Please refer to the full datasheet for comprehensive port-to-port dimensions.)

T-Body with Clamp Connection

BURKERT 20051139 Burkert 2104 T-Body with clamp connection dimensions

INFO

Clamp dimensions must be added to the welded connection dimensions.

Installation and Maintenance

Tightening Torques for Body Connection

When installing the actuator on the valve body, tighten the body screws in three stages (approx. 1/3, then 2/3, and then full tightening torque) crosswise.

Diaphragm size	Tightening torques [Nm] (EPDM, FKM)	Tightening torques [Nm] (PTFE, GYLON®)
8	2	2.5
15	3.5	4
20	4	4.5
25	5	6
40	8	10
50	12	15
65	20	30
80	30	40
100	40	50

WARNING

Damage to diaphragms with threaded connection If the pin is live, the diaphragm may be damaged. First screw on the diaphragm hand-tight, then loosen it by one-half turn anticlockwise.

Explosion Protection (ATEX/IECEx)

For devices with the PX51 code (EPS 18 ATEX 2008 X / IECEx EPS 18.0007 X mech.Ex h IIC T4…T2 Gb / Ex h IIIC T135 °C…T300 °C Db), the valve actuator is suitable for use as Category 2 equipment in Zones 1/21 and 2/22.

BURKERT 20051139 Burkert 2104 grounding strap clip and grounding terminal for ATEX

DANGER

Explosion hazard due to electrostatic discharge!

Take appropriate measures to ensure that static electricity cannot accumulate in the potentially explosive area.
Only wipe the device surfaces gently with a damp or anti-static cloth.
Ground the actuator and the valve body. If a plastic valve body is used, ground the actuator separately.

To establish potential equalization, ground the valve body to the piping system using a conductive connection. Conductive parts must be grounded separately using a grounding strap clip or grounding terminal.