Burkert Type 2104 is an externally controlled diaphragm T-valve consisting 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 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, offering IP65/67 and NEMA Type 4X protection. The 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

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)
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
Ambient temperature	-10 °C...+ 60 °C (autoclavable)

Product Overview

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

Control Functions

• 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

• Explosion protection: ATEX (II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db) and IECEx.
• Foods and beverages/Hygiene: 3-A Sanitary Standards Inc., FDA (Code of Federal Regulations), USP Class VI, EC Regulation 1935/2004.
• Others: TA Luft (Technical instruction on air quality control).

ATEX/IECEx Safety

For use in potentially explosive atmospheres, observe the information on the device and the additional instructions with Ex labelling. The device must be properly grounded to prevent electrostatic charging hazards.

Operating Conditions

Medium Temperature for Diaphragms

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

Installation and Maintenance

Installation Position

The valve can be installed in any position, preferably with the actuator facing up. For leakage detection, one of the relief bores in the diaphragm bonnet must be at the lowest position.

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	EPDM, FKM [Nm]	PTFE, advanced PTFE, GYLON® [Nm]
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