BURKERT Type 2104 (SKU 20033099) 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 or PPS 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, making it ideal for decentralised automation.

It is a 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 degrees of protection and displays high chemical resistance. It is designed to meet stringent hygienic requirements, including FDA, USP Class VI, and 3-A Sanitary Standards.

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

Product Identification

The type label provides essential information including the type, control function, diaphragm size, materials, pilot pressure, operating pressure, and permitted temperatures.

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

Technical Data

Operating Conditions

• Medium: Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums.
• Control medium: Neutral gases, air.
• Ambient temperature: -10 °C to +60 °C (PPS actuator), up to +100 °C for stainless steel actuator.
• Medium temperature (Stainless steel body): -10 °C to +150 °C (depending on diaphragm material).

Diaphragm Medium 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

WARNING

Do not use the diaphragms as a steam shut-off element. The functional properties and service life of the diaphragm can deteriorate as the medium temperature rises.

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

• 3-A Sanitary Standards Inc.: The products comply with 3-A SSI as per certificate.
• FDA: Diaphragms comply with the Code of Federal Regulations published by the FDA.
• USP: Diaphragms are tested according to USP Class VI.
• EC Regulation 1935/2004: Suitable for use with food and beverages.
• ATEX/IECEx: EPS 18 ATEX 2 008 X / IECEx EPS 18.0007X (for specific variants).

DANGER

Explosion Hazard (ATEX/IECEx variants): If the device is used in a potentially explosive area, electrostatic charging must be avoided. Ground the actuator and valve body. Only use approved cleaning agents. Do not open the spring-loaded actuator.

Installation

Installation Position

The valve can be installed in any position, preferably with the actuator facing up. For circular pipelines, specific inclination angles are recommended to ensure self-draining capabilities.

For supply of medium:

For removal of medium:

Installation for leakage detection: One of the relief bores in the diaphragm bonnet for monitoring leakages must be at the lowest position.

Welding the Valve Body

WARNING

Damage to the diaphragm or the actuator: The diaphragm and actuator can be damaged when welding the valve body into the pipeline. Remove the actuator and diaphragm from the valve body before installation.

Tightening Torques for Body Connection

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

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

Maintenance

The device actuator is maintenance-free if operated correctly. The diaphragm and seals are wearing parts.

• Inspection: The relief bore must be inspected at regular intervals for any medium leakages. Tighten body screws crosswise after the first steam sterilisation.
• Replacement: Check the diaphragm for wear after 100,000 switching cycles at the latest. Shortened inspection intervals are required for muddy and abrasive media.