Type 2032
BURKERT 20121245 (Type 2933) is a manually operated 2/2-way diaphragm valve designed for hygienic and aggressive ambient conditions. It consists of a manual actuator with a plastic or stainless steel handwheel, a PTFE/EPDM diaphragm, and a flow-optimized 2-way forged stainless steel valve body. The minimum dead space design enables high flow values and a wide range of possible applications in the food, beverage, biotechnology, and pharmaceutical industries. The actuator features a compact, autoclavable design equipped with an integrated visual position indicator, a reproducible stroke scale, and an adjustable closing limiter.
General Technical Data
| Product properties | Description |
|---|---|
| Valve body material | Forged stainless steel 1.4435 in accordance with BN2 DIN EN 10222-5, F316L in accordance with ASTM A182/A182M and 316L in accordance with ASME BPE |
| Diaphragm material | PTFE with EPDM backing membrane (EA) |
| Actuator material | Stainless steel/PPS, PPS/PPS, stainless steel/stainless steel |
| Standard surface quality | Internally electrically polished: Ra ≤ 0.38 μm (ASME BPE SF4 / DIN HE4) |
| Operating medium | Neutral gases and liquids, highly purified, sterile, aggressive or abrasive media |
| Medium temperature | -10 to +130 °C (steam sterilisation +140 °C for 60 min) |
| Ambient temperature | -10 to +130 °C (short-term up to +150 °C), autoclavable |
Approvals and Conformities
- FDA: The diaphragms made of PTFE/EPDM comply with the Code of Federal Regulations published by the FDA.
- USP: The diaphragms are tested according to United States Pharmacopeial Convention (USP) Class VI.
- EC Regulation 1935/2004: Suitable for use with food and beverages.
- Explosion Protection: ATEX / IECEx Category 2 device suitable for zone 1/21 and zone 2/22 (valid for variable code PX51).
Function and Position Indicator
By manually overriding the handwheel, the force is transmitted via a spindle and the valve is opened or closed. Turning the handwheel anticlockwise opens the valve, turning it clockwise closes it.
Turning the handwheel counterclockwise reveals the yellow position indicator and the scale marked on it as the valve opens further. The stroke scale shows the relative position of the valve and serves as a fixation point for determining the rotation position.
TIP
To protect the actuator, we recommend not closing the actuator with more force than is required to close the valve tightly.
Dimensions
Forged Steel Valve Body (VS) with Clamp Connection
ASME BPE Dimensions (mm)
| Diaphragm size | Port connection Inch | ∅D1 | s | ∅D2 | L | h | H |
|---|---|---|---|---|---|---|---|
| 8 | 1/4" | 6.35 | 0.89 | 25.0 | 64.5 | 5.7 | 15.2 |
| 8 | 3/8" | 9.53 | 0.89 | 25.0 | 89 | 5.7 | 15.2 |
| 8 | 1/2" | 12.7 | 1.65 | 25.0 | 89 | 9.3 | 18.8 |
| 15 | 1/2" | 12.7 | 1.65 | 25.0 | 108 | 8.15 | 19.85 |
| 15 | 3/4" | 19.05 | 1.65 | 25.0 | 89 | 12.05 | 23.75 |
| 20 | 3/4" | 19.05 | 1.65 | 25.0 | 117 | 16 | 30.3 |
| 25 | 1" | 25.4 | 1.65 | 50.5 | 127 | 19 | 37 |
| 40 | 1 1/2" | 38.1 | 1.65 | 50.5 | 159 | 27.6 | 52.4 |
| 50 | 2" | 50.8 | 1.65 | 64.0 | 190 | 35.5 | 68.3 |
Performance Specifications
Flow Characteristics (Forged Steel Valve Body)
| Diaphragm size | Port connection (ASME BPE) | Kv value water [m³/h] |
|---|---|---|
| 8 | 1/4" | 0.7 |
| 8 | 3/8" | 1.6 |
| 8 | 1/2" | 1.5 |
| 15 | 1/2" | 3.1 |
| 15 | 3/4" | 6.5 |
| 20 | 3/4" | 8.4 |
| 25 | 1" | 15.5 |
| 40 | 1 1/2" | 37 |
| 50 | 2" | 66 |
Medium Pressure and Tightening Torques
| Diaphragm size | Max static operating pressure [bar] | Tightening torque for PTFE [Nm] |
|---|---|---|
| 8 | 10 | 1.1 |
| 15 | 10 | 1.7 |
| 20 | 10 | 3 |
| 25 | 10 | 3.5 |
| 32 | 10 | 4 |
| 40 | 10 | 7 |
| 50 | 10 | 11 |
WARNING
The tightening torques refer to the static media pressures specified above. Excessive torque can shorten the service life of the diaphragm. A tolerance of +10% applies to the tightening torques specified.
Installation
Installation Position for Self-Draining
It is the responsibility of the installer and the operator to ensure self-draining. Observe the rules for self-draining during installation:
- Inclination angle of the pipeline: The angle of inclination should correspond to the angle of inclination of the pipeline. For the pipeline, we recommend the inclination angles according to the valid ASME BPE.
- Self-draining angle for valve body: The self-draining angle (α) depends on the valve body size and the inner diameter of the port connection (DN). The marking on the port connection of the valve body serves as an orientation aid. The marking must point upwards.
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