Burkert Type 2104 externally controlled diaphragm T-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 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 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.

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 add-on body is optionally available in plastic or stainless steel (can be rotated 360°). The valve offers the degrees of protection IP65/67 and NEMA Type 4X and displays high chemical resistance.

Product Overview

Fig. 1: Product overview of T-valve Type 2104

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

Fig. 2: Product overview of 3-position actuator

1 Transparent cap	2 Locknut
3 Nut for setting the middle position	4 Actuator cover
5 Actuator housing	6 Pilot air port 1 for CF A (open valve)
7 Pilot air port 2 for CF A (middle position)

Fig. 3: Product overview of T-valve Type 2104 with stainless steel actuator 225

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 Diaphragm bonnet
7 Relief bore	8 Diaphragm
9 Port connection	10 Valve body
11 Body screw

General Technical Data

Product properties
Material
Block body (VH)	Stainless steel block material 1.4435 according to DIN EN 10088 and 316L according to ASTM A479 / A479M
Block body (VI)	Stainless steel block material 1.4435 according to DIN EN 10088 and 316L according to ASME BPE (Table MM- 2.1.1, Ed. 2024) BN2 available on request
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
Diaphragm size	8...100
Standard surface quality
Block body (VH/VI)	Internally electrically polished: Ra ≤ 0.38 μm (NO17) (ASME BPE SF4 / DIN HE4) (externally Ra ≤ 1.6 μm) Internally mechanically polished: Ra ≤ 0.5 μm (NO14) (ASME BPE SF1) (externally Ra ≤ 1.6 μm)
Performance data
Maximum pilot pressure (SF A)	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"
Medium data
Operating medium	Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums
Medium temperature
EPDM (AD)	-10 °C...+ 143 °C (steam sterilisation max. + 150 °C for 60 min)
PTFE/EPDM (EA)	-10 °C...+ 130 °C (steam sterilisation max. + 140 °C for 60 min)
Advanced PTFE/EPDM (EU)	-5 °C...+ 143 °C (steam sterilisation max. + 150 °C for 60 min)
Laminate of GYLON® and EPDM (ER)	-5 °C...+ 130 °C (steam sterilisation max. + 140 °C for 60 min)
Control medium	Neutral gases, air
Product connections
Nominal diameter	DN 06...DN 100 (1⁄8"...4")
Stainless steel body
Welded connection	DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B DIN 11850 - 2 / DIN 11866 series A / DIN EN 10357 series A ASME BPE / DIN 11866 series C
Clamp connection	DIN 32676 series A (DIN pipe) DIN 32676 series B (ISO pipe) ASME BPE
Environment and installation
Installation position	Any installation position, preferably with the actuator facing up
Ambient temperature	-10 °C...+ 60 °C, autoclavable

WARNING

The ambient and medium temperature range may be limited by non-ex-relevant specifications. Observe the Operating Instructions.

Control Functions

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
3-position actuator
Control function A (CF A) Pneumatically operated 2/3-way position valve Bidirectional Normally closed by spring force

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 / 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.
• 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: The diaphragms are suitable for use with food and beverages.

Materials

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

Dimensions

Actuator

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

(Dimensions available for DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B, DIN 11850 - 2 / DIN 11866 series A / DIN EN 10357 series A, ASME BPE / DIN 11866 series C, SMS 3008, DIN 11850-0)

T-Body with Clamp Connection

(Clamp dimensions must be added to the welded connection dimensions. Available for DIN 32676 series A, DIN 32676 series B, ASME BPE)

Performance Specifications

Medium Pressure (Control Function A)

INFO

For low operating pressures, optional variants with reduced spring force (EC04) are recommended. Pressure data [bar]: Overpressure to atmospheric pressure. Static: When closed, the valve is pressurised on one side with the maximum operating pressure.

Diaphragm size [mm]	Actuator size ∅	Pilot pressure [bar]	Maximum static operating pressure EPDM, FKM [bar]	Maximum static operating pressure PTFE/EPDM, advanced PTFE/EPDM, 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)	5.5...10	10	6
25	90 (N)	5.0...10	10	10
40	90 (N)	5.5...10	7.5	6
40	130 (P)	5.0...7	10	10
50	130 (P)	5.0...7	10	10
65	130 (P)	5.0...7	7.5	5
65	225 (L)	2.7...7	10	10
80	225 (L)	5.4...7	10	10
100	225 (L)	5.6...7	10	10

Compatible Automation Units

The Type 2104 can be combined with various Burkert control heads and positioners for decentralised automation:

• Type 8691 / 8695: Control head for decentralised automation of ELEMENT process valves.
• Type 8690 / 8697: Pneumatic control unit / position feedback.
• Type 8692 / 8694 / 8696: Digital electropneumatic positioner for integrated mounting.
• Type 8693: Digital electropneumatic process controller for integrated mounting.
• Type 8792 / 8793: Positioner and Process controller SideControl Remote.