Type 2032
BURKERT 20031623 (Type 2104) is an externally controlled pneumatic diaphragm T-valve engineered for hygienic and decentralised process automation. The valve assembly integrates a pneumatically actuated ELEMENT piston drive in a stainless steel casing, a zero-deadleg T-valve body, and a sealing diaphragm. Control function A operates in a normally closed configuration, holding the valve shut via spring force until pilot pressure is applied. Port connection 1 provides a DN 50 (2 inch) weld end adhering to ASME BPE and DIN 11866 Series C piping standards, with an outer diameter of 50.8 mm, an inner diameter of 47.5 mm, and a 1.65 mm wall thickness. The valve body orifice corresponds to a nominal diameter of 25 mm, matching diaphragm size 25.
Designed for neutral gases, deionised water, ultra-pure fluids, sterile liquids, and chemically aggressive process media, article 20031623 operates over a media pressure range of 0 to 10 bar (PN 16 / Class 150) and a medium temperature range of -5 °C to +130 °C. The valve supports clean-in-place (CIP) and sterilisation-in-place (SIP) cycles, with steam sterilisation ratings up to +140 °C for 60 minutes. Pneumatic actuation requires a control air pressure between 5 and 10 bar via a female threaded G 1/8" connection.
Technical Data
| Parameter | Specification |
|---|---|
| Product Type | Type 2104 T-diaphragm valve complete assembly |
| Article Number (SKU) | 20031623 |
| Control Function | Control function A (CF A, normally closed by spring force) |
| Number of Switching Positions | 2 |
| Fluidic Ports | 3 (3/2-way T-port pattern) |
| Port 1 Connection Type | Weld end |
| Port 1 Pipe Standard | ASME BPE / DIN 11866 Series C |
| Port 1 Nominal Diameter | DN 50 (2 inch) |
| Port 1 Dimensions | OD 50.8 mm, ID 47.5 mm, wall thickness 1.65 mm (0.065") |
| Body Nominal Size | 25 mm (Diaphragm size 25) |
| Operating Medium Pressure | 0 to 10 bar |
| Nominal Pressure Class | PN 16 / ASME Class 150 |
| Pilot Pressure Range | 5 to 10 bar |
| Pilot Air Connection | G 1/8" female thread (or push-in connector ∅ 6 mm / 1/4") |
| Medium Temperature | -5 °C to +130 °C (Steam sterilisation max. +140 °C for 60 min) |
| Ambient Temperature | -5 °C to +100 °C (Standard -10 °C to +60 °C, autoclavable) |
| CIP / SIP Capability | Yes, fully cleanable and steam-sterilisable |
| Body Material | Stainless steel block material 1.4435 (DIN EN 10088) / 316L (ASME BPE) |
| Actuator Envelope / Body | PPS actuator core with stainless steel 1.4561 (316Ti) casing |
| Diaphragm Material | GYLON® laminated with EPDM backing (ER) |
| Piston Seal Material | FKM |
| Degree of Protection | IP65 / IP67, NEMA Type 4X |
Material Specifications
The ELEMENT stainless steel actuator assembly and valve body utilize the following structural components:
| Item No. | Element | Material |
|---|---|---|
| 1 | Ground terminal | Stainless steel 1.4301 / 1.4305 (for ATEX / IECEx variants) |
| 2 | Transparent cap | Polysulfone (PSU) |
| 3 | Pilot air ports | Push-in connector PP (standard), G 1/8" thread stainless steel 1.4305 |
| 4 | Actuator body | Polyphenylene sulphide (PPS) |
| 5 | Actuator cover | Stainless steel 1.4561 (316Ti) |
| 6 | Piston seal | FKM |
| 7 | Diaphragm | GYLON® laminated with EPDM (ER); also EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU) |
| 8 | Valve body | Stainless steel 1.4435 (DIN EN 10088) / 316L (ASTM A479 / ASME BPE) |
Wetted internal surfaces are finished to sanitary requirements, with internal electropolishing to Ra ≤ 0.38 µm (ASME BPE SF4 / DIN HE4) or mechanical polishing to Ra ≤ 0.5 µm (ASME BPE SF1). External block surfaces maintain a surface roughness of Ra ≤ 1.6 µm.
Dimensions
Welded Body Dimensions (ASME BPE / DIN 11866 Series C)
For diaphragm size 25 with a DN 50 main line reduced or branched to DN 25 (Port 1–Port 2 designation 50...25, product key SODI-SODF):
| Diaphragm Size | Port 1–Port 2 DN | ∅D1 (mm) | s1 (mm) | ∅D2 (mm) | s2 (mm) | A (mm) | B (mm) | C (mm) | E (mm) | F (mm) | G (mm) | H (mm) | I (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 50...25 | 50.80 | 1.65 | 25.40 | 1.65 | 134.5 | 30.0 | 87.5 | 25.0 | 120.0 | 75.0 | 44.0 | 24.0 |
Actuator Dimensions
Actuator dimensions for diaphragm size 25 across standard ELEMENT actuator sizes:
| Diaphragm Size | Actuator Size ∅ (mm) | ∅ A (mm) | Total Height with Type 8691 / 8695 (mm) | Total Height with Type 8690 / 8697 (mm) | Height H+M (MT86) (mm) |
|---|---|---|---|---|---|
| 25 | 70 (M) | 92 | 268 | 235 | 172 |
| 25 | 90 (N) | 120 | 301 | 269 | 205 |
Operating Pressure Limits
Static operating pressure limits for control function A under one-sided pressure application:
| Diaphragm Size | Actuator Size ∅ (mm) | Pilot Pressure (bar) | Max. Operating Pressure (EPDM / FKM) | Max. Operating Pressure (PTFE / GYLON® / EPDM) |
|---|---|---|---|---|
| 25 | 70 (M) | 5.5...10 | 10 bar | 6 bar |
| 25 | 90 (N) | 5.0...10 | 10 bar | 10 bar |
Factory Configuration
Article 20031623 is rated for full 0 to 10 bar medium operating pressure with a required control air supply of 5 to 10 bar.
Approvals and Standards
BURKERT Type 2104 diaphragm valves comply with the following international directives and standards:
- Food Contact and Sanitary Standards: Diaphragms in GYLON®/EPDM comply with FDA 21 CFR regulations, USP Class VI requirements, and Regulation (EC) No 1935/2004 for food and beverage contact. Conforms to 3-A Sanitary Standards (variable code PE05).
- Pressure and Material Quality: Supplied with manufacturer inspection certificate EN 10204 3.1 and membrane certificate 2.1.
- Air Quality: Meets Technical Instruction on Air Quality Control (TA Luft, variable code PM01).
- Protection Ratings: Ingress protection ratings IP65 / IP67 and NEMA Type 4X.
Explosion Protection (ATEX and IECEx)
Type 2104 can be deployed in hazardous areas under mechanical explosion protection standards:
- ATEX Certificate: EPS 18 ATEX 2 008 X
- IECEx Certificate: IECEx EPS 18.0007X
- Classification: II 2G Ex h IIC T4…T2 Gb / II 2D Ex h IIIC T135 °C…T300 °C Db
Temperature Classes for Hazardous Areas
| Temperature Class | T4 | T3 | T2 |
|---|---|---|---|
| Maximum Surface Temperature | +135 °C | +200 °C | +300 °C |
| Permissible Ambient Temperature | -40 °C to +100 °C | -40 °C to +130 °C | -40 °C to +130 °C |
| Maximum Medium Temperature | +125 °C | +185 °C | +285 °C |
Electrostatic Precautions in Hazardous Zones
Electrostatic discharges in Zone 1/21 or 2/22 present an ignition risk. Adhere to the following measures:
- Wipe exterior surfaces solely with a damp or antistatic cloth.
- Establish equipotential bonding by grounding the valve body to the piping system.
- Electrically ground conductive actuator parts using the grounding terminal (1.4301/1.4305) or grounding strap.
- When pumping media with conductivity ≤ 100 pS/m, flow velocity must not exceed 1 m/s, or the pipeline must be protected against running dry per IEC 60079-32-1.
Automation Integration Options
Type 2104 can be combined with decentralised automation control heads and positioners:
- Control Heads (Type 8691 / 8695): Contactless inductive position sensing, integrated pilot valve with manual override, high-intensity coloured LEDs for valve status indication, and AS-Interface, IO-Link, or büS communication.
- Pneumatic Feedback Units (Type 8690 / 8697): Mechanical or inductive limit switches for binary valve position feedback.
- Positioners and Process Controllers (Type 8692 / 8693 / 8694 / 8696): Electropneumatic continuous positioning and process control with autotune commissioning, diagnostic functions, and fieldbus options (PROFIBUS DPV1, PROFINET, EtherNet/IP, Modbus TCP).
- SideControl Remote Units (Type 8792 / 8793 / 8791): Remote mountable positioning system coupled with external linear displacement sensor Type 8798.
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