BURKERT 20012212 (Type 2032) is an externally piloted CLASSIC series T-diaphragm valve designed for ultra-pure, sterile, and hygienic process installations. The assembly consists of a pneumatically operated PPS piston actuator (size 40 / C), an internal PTFE/EPDM backing membrane, and a zero-deadleg T-valve body machined from high-purity stainless steel block material 1.4435 (316L). Configured with Control Function A (normally closed by spring force), the valve controls fluid routing across three process ports with weld-end connections configured to ASME BPE and DIN 11866 Series C (3/8" outer diameter, 9.53 mm OD x 0.89 mm wall thickness, DN 10 / diaphragm size 8).

The unit features a static operating pressure range of 0 to 10 bar, an internal electropolished surface finish of Ra ≤ 0.38 µm (ASME BPE SF4 / DIN HE4), and full compatibility with CIP and SIP cleaning regimens. The high-performance PPS actuator body is autoclavable, operates across ambient temperatures from +5 °C to +140 °C, and includes an optical position indicator as standard. Each valve ships complete with an EN 10204 3.1 inspection certificate and a 2.1 factory certification for the diaphragm.

Technical Specifications

Specification Parameter	Value / Range
Model / SKU	20012212
Type Series	2032 CLASSIC
Configuration Type	Valve complete, 3/2-way T-pattern
Operating Mode	Pneumatic, externally piloted
Control Function	Control Function A (normally closed, NC)
Diaphragm Size	Size 8 mm
Process Port Size	DN 10 (3/8" outer diameter)
Port 1 Outer Diameter (OD)	9.53 mm (0.375")
Port 1 Inner Diameter (ID)	7.75 mm
Port 1 Wall Thickness	0.89 mm (0.035")
Connection Standard	ASME BPE, DIN 11866 Series C
Connection End	Butt weld end
Medium Operating Pressure (Static)	0.00 to 10.00 bar
Nominal Pressure Class	PN 16 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot Air Pressure Range	5.0 to 7.0 bar
Pilot Air Connection	G 1/8" female thread
Medium Temperature (PTFE/EPDM)	-10 °C to +130 °C (SIP max. +140 °C for 60 min)
Ambient Temperature (PPS Actuator)	+5 °C to +140 °C
Valve Body Material	Stainless steel block 1.4435 (DIN EN 10088) / 316L (ASME BPE)
Actuator Housing Material	Polyphenylene sulphide (PPS), size 40 (C)
Diaphragm Material	PTFE with EPDM backing membrane (EA code)
Piston Seal Material	FKM (fluor rubber)
Surface Roughness (Wetted)	Internal electropolished: Ra ≤ 0.38 µm (external Ra ≤ 1.6 µm)
Cleanability Compliance	CIP capable, SIP capable
Documentation Included	EN 10204 3.1 manufacturer certificate, 2.1 diaphragm certificate

Actuator Construction & Materials

The CLASSIC actuator housing for sizes 40 to 125 uses an autoclavable thermoplastic construction designed for aggressive ambient atmospheres and washdown environments. Individual components are selected for resistance to sterilisation cycles and process chemicals:

Item No.	Element	Material
1	Transparent Cap	Polysulfone (PSU)
2	Cover / Actuator Body	Polyphenylene sulphide (PPS standard, PA optional)
3	Pilot Air Ports	Stainless steel 1.4305
4	Piston Seal	Fluor rubber (FKM)
5	Socket	Sinter metal
6	Interface	Stainless steel 1.4404
7	Diaphragm	PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), EPDM (AD), GYLON®/EPDM (ER)
8	Valve Body	Stainless steel block material 1.4435 / 316L

Actuator & T-Body Dimensions

Actuator Dimensions (Diaphragm Size 8, Actuator Size 40 C)

Diaphragm Size	Actuator Size ∅	∅ A [mm]	C [mm]	Pilot Port K	H [mm]	Height with MT85 / Type 8697 (HM + MT85) [mm]
8	40 (C)	53	34	G 1/8"	111	207

ASME BPE / DIN 11866 Series C Welded T-Body Dimensions (Diaphragm Size 8)

Diaphragm Size	Main Run DN – Branch DN	Run ∅D1 [mm]	Run Wall s1 [mm]	Branch ∅D2 [mm]	Branch Wall s2 [mm]	A [mm]	B [mm]	C [mm]	E [mm]	F [mm]	G [mm]	H [mm]	I [mm]	Product Key Code
8	20 to 8	19.05	1.65	6.35	0.89	88.0	25	49.90	20	61	32	20	10.0	SA93-SA90
8	25 to 10	25.40	1.65	9.53	0.89	88.0	25	53.00	20	68	38	23	13.0	SODF-SA91
8	40 to 8	38.10	1.65	6.35	0.89	88.0	25	59.40	20	80	49	28	18.0	SODH-SA90
8	50 to 8	50.80	1.65	6.35	0.89	98.0	30	65.80	20	93	59	32	22.0	SODI-SA90
8	65 to 8	63.50	1.65	6.35	0.89	98.0	30	72.10	20	106	70	36	26.0	SODJ-SA90

Medium Pressure and Pilot Control Data

For Control Function A (normally closed), static pressure limits depend on actuator sizing and diaphragm elastomer characteristics:

Diaphragm Size [mm]	Actuator Size ∅	Pilot Pressure [bar]	Max Static Operating Pressure: EPDM, FKM [bar]	Max Static Operating Pressure: PTFE/EPDM, GYLON® [bar]
8	40 (C)	5.0 to 7.0	10	10
15	50 (D)	5.0 to 7.0	10	—
15	63 (E)	5.0 to 7.0	10	10
20	63 (E)	5.5 to 7.0	10	10
20	80 (F)	5.0 to 7.0	10	10
25	80 (F)	5.5 to 7.0	10	10
40	100 (G)	5.5 to 7.0	10	9 (6 bar for GYLON®)
40	125 (H)	5.5 to 7.0	10	10
50	125 (H)	5.5 to 7.0	10	10

Medium Pressure Definition

All stated pressure values represent gauge pressure relative to atmospheric pressure. Static pressure refers to conditions where maximum operating pressure is applied to one side of the valve in the closed state.

Standards, Approvals & Conformity

BURKERT Type 2032 valves comply with relevant European Directives and global sanitary manufacturing criteria:

• Sanitary Standard Compliance: 3-A Sanitary Standards Inc. (variable code PE05).
• FDA Conformity: EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), and GYLON®/EPDM (ER) diaphragms comply with the Code of Federal Regulations published by the FDA.
• USP Class VI: Diaphragm materials are tested and certified in accordance with USP Class VI.
• EC Regulation 1935/2004: Wetted elastomer materials conform to European regulations for contact with food and beverages.
• Fugitive Emissions: TA-Luft compliance certified for variable code PM01.
• Explosion Protection (Optional variable code PX51): ATEX EPS 18 ATEX 2 008 X (II 2G Ex h IIC T4…T2 Gb, II 2D Ex h IIIC T135 °C…T300 °C Db) and IECEx EPS 18.0007X.

Installation Guidelines & Piping Integration

The valve can be mounted in any orientation, but positioning the actuator upright is recommended for prolonged cycle life. When integrating the T-valve into loop distribution piping, observe the manufacturer-defined orientation to prevent fluid hold-up:

1. Ensure piping lines maintain a continuous decline of 1° to 5° to ensure self-draining performance.
2. Ensure the leak detection weep hole in the actuator bonnet points toward the lowest point to detect diaphragm wear immediately.
3. Support and align pipe runs prior to fitting the body to eliminate thermal and mechanical pipe stress on the valve body.

Dismount Actuator and Diaphragm Before Welding

Thermal damage from orbital or manual welding will destroy elastomer diaphragms and actuator internal seals. Always remove the actuator and diaphragm prior to welding the valve body into the line.

Actuator Dismounting Procedure Prior to Welding (Control Function A)

1. Connect compressed air (5.0 to 7.0 bar) to the lower pilot air port (Port 1) to lift the diaphragm away from the valve seat weir.
2. Loosen body fasteners crosswise while pilot air pressure is applied.
3. Remove the actuator assembly with the attached diaphragm away from the stainless steel block body.
4. Perform pipeline welding and chemical passivation.
5. Reassemble the actuator only after the body has cooled completely.

Diaphragm Replacement & Maintenance

For diaphragm size 8, the valve uses a snap-in mounting mechanism (unthreaded snap connection). Inspection of the overflow weep hole should be performed routinely for any media ingress.

Diaphragm Installation Sequence (Control Function A)

1. Supply pilot air pressure to the lower pilot port to hold the actuator spindle in the retracted position.
2. Snap the new diaphragm securely into the spindle retainer. Align the diaphragm alignment tab perpendicular to the fluid flow axis.
3. Position the actuator onto the valve body.
4. Screw in body bolts lightly crosswise until the diaphragm is captured evenly between body and actuator.
5. Cycle the valve pneumatically twice to seat the elastomer correctly.
6. Depressurise the pilot port completely.
7. Tighten body fasteners in three progressive torque increments (approx. 1/3, 2/3, and 3/3 of nominal torque) in a crosswise pattern to the final torque specified below.

Tightening Torques for Diaphragm Fasteners

Diaphragm Size	Forged / Block / Cast Bodies (VS, VG, Block): EPDM/FKM [Nm]	Forged / Block / Cast Bodies: PTFE / Advanced PTFE [Nm]	Tube-Formed Bodies (VA, VP): EPDM/FKM [Nm]	Tube-Formed Bodies: PTFE / Advanced PTFE [Nm]
8	2.0	2.5	2.5	2.5
15	3.5	4.0	3.5	4.0
20	4.0	4.5	4.0	4.5
25	5.0	6.0	7.0	8.0
32	6.0	8.0	8.0	10.0
40	8.0	10.0	12.0	15.0
50	12.0	15.0	15.0	20.0
65	20.0	30.0	20.0	30.0

Torque Limits

Tightening torque tolerance is +10%. For size 8 PTFE/EPDM diaphragms, exact nominal torque is 2.5 Nm. Over-tightening fasteners will reduce diaphragm operating life. Re-torque fasteners crosswise after the initial steam sterilisation run.

Spare Parts Identification

Component Description	Order Code / Article No.
Seal kit for PPS Actuator Size C (Size 8)	011 465
Replacement Diaphragm Size 8: PTFE (EA)	677 674 (marking L04/L10)
Replacement Diaphragm Size 8: Advanced PTFE (EU)	679 540 (marking L05/L09)
Replacement Diaphragm Size 8: EPDM (AD)	688 421 (marking E03/E04)
Replacement Diaphragm Size 8: GYLON® Laminate (ER)	693 175 (marking L06/L08)