BURKERT 20072310 (Type 2104) is an externally controlled pneumatic T-diaphragm valve designed for hygienic, sterile, and demanding process applications. The assembly integrates a pneumatic piston actuator with a stainless steel outer casing, a high-purity diaphragm, and a machined stainless steel T-valve body. It provides a compact flow diverter or sampling solution with zero dead leg in pipe distribution systems, conforming to ASME BPE and DIN 11866 series C dimensions. Operating in control function A (normally closed by spring force), this valve delivers bi-directional tight shut-off from 0 to 10 bar medium pressure.

Equipped with an Advanced PTFE diaphragm backed by an EPDM cushion, the unit withstands continuous process media temperatures from -5 °C to +143 °C and short-term steam sterilisation up to +150 °C for 60 minutes. The valve is completely CIP and SIP capable. The actuator incorporates internal pilot air channels to prevent ambient air intake into the spring chamber, achieving IP65/IP67 and NEMA Type 4X protection in aggressive or washdown plant environments.

Valve Design and Construction

Type 2104 valves feature a dead-space-free block body geometry machined from forged or bar stainless steel. The ELEMENT pneumatic actuator features a polyphenylene sulphide (PPS) core enclosed in a 1.4561 (316Ti) stainless steel jacket. A 360° rotatable pilot air interface facilitates direct mounting of control heads or positioners without external tubing.

Item	Component	Material
1	Ground terminal	Stainless steel 1.4301 / 1.4305 (for ATEX/IECEx variants)
2	Transparent optical cap	Polysulfone (PSU)
3	Pilot air ports	Polypropylene (PP) push-in connector (6 mm standard); optional G 1/8 stainless steel 1.4305
4	Actuator body	Polyphenylene sulphide (PPS)
5	Actuator cover	Stainless steel 1.4561 (316Ti)
6	Piston seal	Fluoroelastomer (FKM)
7	Diaphragm	Advanced PTFE with EPDM backing (EU)
8	Valve body	Stainless steel block 1.4435 (DIN EN 10088) / 316L (ASTM A479 / ASME BPE)

Technical Specifications and Operating Limits

Parameter	Value
Product identification	Type 2104 (Article 20072310)
Port connection 1 (run)	Weld end DN 65 (2 1/2", OD 63.5 mm, ID 60.2 mm, wall 1.65 mm)
Pipe standard	ASME BPE / DIN 11866 Series C
Diaphragm orifice / branch	DN 40 (diaphragm size 40)
Control function	CF A: normally closed by spring force
Actuator size	130 mm diameter (Code P)
Operating medium pressure	0 bar to 10 bar
Pilot control pressure	5.0 bar to 7.0 bar (neutral gases, air)
Medium temperature range	-5 °C to +143 °C (steam sterilisation up to +150 °C for 60 min)
Ambient temperature range	-5 °C to +60 °C (actuator autoclavable)
Pressure classes	PN 16 (DIN EN 1333) / Class 150 (DIN EN 1759)
Internal surface roughness	Mechanically polished Ra ≤ 0.5 µm (SF1); electropolished Ra ≤ 0.38 µm (SF4)
External surface roughness	Ra ≤ 1.6 µm
Pilot air connection	6 mm push-in fitting (accessories for interface)
Protection rating	IP65 / IP67, NEMA Type 4X

Medium Pressure and Actuator Sizing

Operating pressures are certified for control function A up to the maximum rating based on diaphragm size and actuator diameter. The 130 mm (P) actuator installed on diaphragm size 40 provides tight shut-off up to 10 bar static operating pressure with Advanced PTFE diaphragms.

Diaphragm Size	Actuator Size ∅ [mm]	Pilot Pressure [bar]	Max. Static Pressure (EPDM, FKM) [bar]	Max. Static Pressure (PTFE/EPDM, Adv. PTFE) [bar]
8	50 (D)	3.7 to 10.0	10.0	10.0 (reinforced spring)
15	50 (D)	5.0 to 10.0	10.0	—
15	70 (M)	4.8 to 10.0	10.0	10.0
20	70 (M)	4.8 to 10.0	10.0	10.0
25	70 (M)	5.5 to 10.0	10.0	6.0
25	90 (N)	5.0 to 10.0	10.0	10.0
40	90 (N)	5.5 to 10.0	7.5	6.0
40	130 (P)	5.0 to 7.0	10.0	10.0
50	130 (P)	5.0 to 7.0	10.0	10.0
65	130 (P)	5.0 to 7.0	7.5	5.0
65	225 (L)	2.7 to 7.0	10.0	10.0
80	225 (L)	5.4 to 7.0	10.0	10.0
100	225 (L)	5.6 to 7.0	10.0	9.0 (Adv. PTFE) / 10.0 (PTFE)

Dimensions and Port Configuration

Dimensions for the ASME BPE / DIN 11866 series C welded T-body with diaphragm size 40 are listed below. For article 20072310, the main run is DN 65 (OD 63.50 mm) and the branch is DN 40 (OD 38.10 mm).

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]	Product Key
40	40...40	38.10	1.65	38.10	1.65	152.0	25.0	99.6	25.0	121.0	58.0	35.0	6.4	SODH-SODH
40	50...40	50.80	1.65	38.10	1.65	162.0	30.0	101.6	25.0	131.0	72.0	43.0	14.4	SODI-SODH
40	65...40	63.50	1.65	38.10	1.65	162.0	30.0	107.9	25.0	143.0	85.0	50.0	21.4	SODJ-SODH
40	80...40	76.20	1.65	38.10	1.65	162.0	30.0	114.3	25.0	156.0	98.0	56.0	27.4	SODK-SODH

Actuator heights and envelope dimensions depend on the automation module fitted to the upper interface.

Diaphragm Size	Actuator Size ∅	Actuator Envelope ∅ A [mm]	Height HS with 8691 / 8695 [mm]	Height HS with 8690 / 8697 [mm]	Height H+M (MT86) [mm]
40	90 (N)	120	317	285	221
40	130 (P)	160	370	337	274

Hygienic Standards and Approvals

BURKERT 20072310 complies with international hygiene, material safety, and pharmaceutical guidelines:

Standard / Authority	Scope and Description
FDA	Code of Federal Regulations title 21 compliance for Advanced PTFE/EPDM membranes
USP	Tested and certified according to USP Class VI biological reactivity tests
EC 1935/2004	Compliance with European regulations for materials in contact with food and beverages
3-A SSI	3-A Sanitary Standards Inc. certified (applicable with variable code PE05)
TA Luft	Certified according to the German Technical Instructions on Air Quality Control (code PM01)
Material Testing	Factory certificate DIN EN 10204 2.1 for diaphragm; 3.1 inspection certificate enclosed

Explosion Protection and Hazardous Area Operation

When equipped with ATEX/IECEx specification (code PX51), Type 2104 is certified as category 2 mechanical non-electrical equipment with structural safety (Ex h) for Zones 1/21 and Zones 2/22.

• ATEX marking: 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 marking: IECEx EPS 18.0007X Ex h IIC T4…T2 Gb / Ex h IIIC T135 °C…T300 °C Db

Temperature Class	Maximum Surface Temperature	Permissible Ambient Temperature	Maximum Medium Temperature
T2	+300 °C	-40 °C to +130 °C	+285 °C
T3	+200 °C	-40 °C to +130 °C	+185 °C
T4	+135 °C	-40 °C to +100 °C	+125 °C

Static Discharge Hazard

In potentially explosive atmospheres, prevent electrostatic charging on exterior surfaces. Clean the device only using a damp or antistatic cloth. The valve body and actuator envelope must be connected to the plant equipotential bonding (PA) system.

Media velocity restrictions apply under IEC 60079-32-1 based on electrical conductivity:

1. Media with conductivity ≤ 100 pS/m require flow velocities ≤ 1 m/s or pipe dry-run protection.
2. Media with conductivity between 100 pS/m and 1,000 pS/m are permitted only for particle-free liquids, steam, or pure gas.
3. Media with conductivity > 1,000 pS/m have no velocity limitations.

Automation Units and System Combinations

Type 2104 can be configured with modular ELEMENT automation heads to form complete automated valve assemblies:

• Valve System 8801-TB (On/Off Automation):
  • Type 8691: Control head with contactless inductive sensor, colored high-visibility LEDs, and AS-i, IO-Link, or büS communication (actuators ∅ 70 to 225 mm).
  • Type 8695: Compact control head for actuator size ∅ 50 mm.
  • Type 8690 / Type 8697: Pneumatic control units with mechanical or inductive limit switches.
• Valve System 8802-TB (Continuous Control Automation):
  • Type 8692 / Type 8694: Electropneumatic positioners with graphic display or DIP switch setup.
  • Type 8693: Digital process controller with automatic TUNE adaptation.
  • Type 8792 / Type 8793: SideControl remote positioner/process controller paired with Type 8798 remote displacement sensor.

All control heads utilize an internal ventilation channel that flushes clean pilot air into the actuator spring chamber, protecting mechanical return springs from aggressive plant atmospheres.