Burkert Type 2032 externally controlled diaphragm valve consists of a pneumatically operated piston actuator, a diaphragm, and a T-valve body. The proven and robust actuator with a plastic housing ensures reliable use in hygienic or aggressive ambient conditions. The flow-efficient valve bodies with little dead space enable high flow rates and a wide range of possible uses. The valve body and the diaphragm are available in all common materials and variants. The actuator features a compact, autoclavable design (PPS variant), making it ideal for sterile applications.

The integration of automation units such as Type 8690/8697 is possible in all configuration levels and can be retrofitted. An explosion-proof ATEX/IECEx device variant is also available. The actuator is equipped with an integrated, optical position indicator as standard, and a minimum/maximum stroke limiter can be installed optionally.

Structure and Functionality

Depending on the control function, spring force (CF A) or pneumatic pilot pressure (CF B, CF I) generates the closing force. A spindle connected to the actuator piston transfers the force to the compressor, which presses the diaphragm against the weir in the valve body.

• 1 Transparent cap with position
• 2 Actuator cover
• 3 Upper pilot air port for CF B and CF I
• 4 Lower pilot air port for CF A and CF I
• 5 Diaphragm bonnet
• 6 Relief bore
• 7 Diaphragm
• 8 Port connection
• 9 Valve body
• 10 Body screw

General Technical Data

Product Properties	Details
Block body (VH/VI)	Stainless steel block material 1.4435 according to DIN EN 10088 and 316L according to ASTM A479 / ASME BPE
Diaphragm	EPDM (AD), PTFE/EPDM (EA), Advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
Actuator	PPS, PA
Diaphragm size	8...100
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	7 bar (for actuator size 40...125/PPS); 6 bar (for actuator size 175 and 225/PA)
Pilot air port	Thread G 1/4, thread G 1/8 for actuator size 40 and 50
Operating medium	Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums
Control medium	Neutral gases, air
Nominal diameter	DN 06...DN 100 (1/8"...4")

Medium Temperature

Diaphragm Material	Medium Temperature	Comments
EPDM (AD)	-10 °C...+143 °C	Steam sterilisation max. +150 °C for 60 min
PTFE/EPDM (EA)	-10 °C...+130 °C	Steam sterilisation max. +140 °C for 60 min
Advanced PTFE/EPDM (EU)	-5 °C...+143 °C	Steam sterilisation max. +150 °C for 60 min
Laminate of GYLON® and EPDM (ER)	-5 °C...+130 °C	Steam sterilisation max. +140 °C for 60 min

Control Functions

Symbol	Description
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.
• 3-A Sanitary Standards Inc.: The products comply with 3-A Sanitary Standards Inc (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: Diaphragms are suitable for use with food and beverages.

Materials

Actuator Size 40…125

No.	Element	Material
1	Transparent cap	Polysulfone PSU
2	Cover	Polyphenylene sulphide PPS (standard), Polyamide PA (on request)
3	Pilot air ports	Stainless steel 1.4305
4	Piston seal	FKM
5	Socket	Sinter metal
6	Interface	Stainless steel 1.4404
7	Diaphragm	EPDM, PTFE/EPDM, Advanced PTFE/EPDM, laminate of GYLON® and EPDM

Dimensions

Actuator

Diaphragm size	Actuator size ∅	∅ A	C	K	H
8	40 (C)	53	34	G 1/8"	111
15	50 (D)	64	39	G 1/8"	137
15	63 (E)	80	52	G 1/4"	154
20	63 (E)	80	52	G 1/4"	165
20	80 (F)	101	52	G 1/4"	186
25	63 (E)	80	52	G 1/4"	170
25	80 (F)	101	60	G 1/4"	190

T-Body with Welded Connection

(Dimensions in mm, unless otherwise stated. Please refer to the full datasheet for comprehensive dimensional tables covering all port sizes and standards including DIN EN ISO 1127, ASME BPE, and SMS 3008).

T-Body with Clamp Connection

Note

The clamp dimensions must be added to the welded connection dimensions.

Installation

Installation Position

The diaphragm valve can be installed in any position, preferably with the actuator facing up. The following installation positions are recommended for the installation of T-valve bodies in circular pipelines to ensure self-draining capabilities:

Installation for Leakage Detection

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

Performance Specifications

Maximum Permissible Operating Pressure for Control Function A

Diaphragm size	Actuator size ∅	Pilot pressure [bar]	Max operating pressure EPDM, FKM [bar]	Max operating pressure PTFE, GYLON® [bar]
8	40 (C)	5.0...7	10	10
15	50 (D)	5.0...7	10	-
15	63 (E)	5.0...7	10	10
20	63 (E)	5.5...7	10	10
20	80 (F)	5.0...7	10	10
25	80 (F)	5.5...7	10	10
40	100 (G)	5.5...7	10	9
40	125 (H)	5.5...7	10	10

Pressure Limits

For low operating pressures, optional variants with reduced spring force (EC04) are recommended. The maximum operating pressure for laminate of GYLON® and EPDM (ER diaphragm) is 6 bar for size 40/100(G).

Product Accessories

Electric Position Feedback Indicator Type 8697

The position feedback Type 8697 is designed for integrated mounting on CLASSIC series 20XX process valves, suiting the requirements of hygienic process environments. Mechanical or inductive limit switches register the position of the valve.

• Compact design with LED position indicator.
• Easy-to-clean chemically resistant housing featuring IP65/IP67, 4X Rating.
• Optionally intrinsically safe variant according to ATEX/IECEx.