PN16
BURKERT 20043587 (Type 6213 EV) is a servo-assisted 2/2-way diaphragm valve with a brass body, G 1/2 threaded process connections, and an EPDM sealing system. The valve utilizes a spring coupling between the solenoid armature and the diaphragm to assist opening. Article 20043587 is configured for direct-current operation at 12 V DC with an operating pressure rating of 0 to 10 bar (PN 10) and a nominal orifice of 13 mm (1/2 inch).
With a water flow coefficient (Kv) of 3.6 m³/h and a nominal air flow rate (QNn) of 3,900 l/min, this valve provides high fluid throughput within a compact 58 mm installation length. The soft-closing damped design limits pressure surges during actuation. Media-wetted components comply with drinking water contact requirements under WRAS/WRC and UBA assessment guidelines.
Circuit Function and Operating Principle
Article 20043587 operates according to circuit function A (CF A). It is a 2/2-way valve that remains closed when de-energized.
In the de-energized state, the pilot core closes the pilot control orifice (1.1 mm diameter). Upstream pressure accumulates above the diaphragm through a small control bypass, pressing the diaphragm against the valve seat. When energized by a 12 V DC electrical signal, the magnetic core lifts, opening the pilot orifice and venting the chamber above the diaphragm. The elastic spring coupling between the plunger and the diaphragm supports the lifting movement, opening the valve across the main orifice.
Differential Pressure Requirements
The spring-assisted diaphragm design initiates opening without differential pressure. Opening the full valve cross-section requires a minimum differential pressure of 0.5 bar. For gas and vacuum applications without differential pressure, the specialized HP00 variant is recommended by Bürkert.
Technical Specifications
| Parameter | Value (Article 20043587) |
|---|---|
| Valve Type | 6213 EV (Generation EV) |
| Circuit Function | Circuit function A (WW A), normally closed (NC) |
| Orifice Size (DN) | 13 mm (pilot orifice: 1.1 mm) |
| Process Connection | G 1/2 internal thread |
| Operating Voltage | 12 V DC (tolerance ±10%) |
| Operating Pressure Range | 0.00 to 10.00 bar (gauge pressure, PN 10) |
| Flow Factor Kv (Water) | 3.6 m³/h |
| Flow Rate QNn (Gas) | 3,900 l/min |
| Valve Body Material | Brass (acc. to DIN EN 50930-6) |
| Seal Material | EPDM (seat seal and external seals) |
| Pilot Control Material | PA (Polyamide) |
| Medium Temperature Range | -30 °C to +90 °C (polyamide coil) |
| Ambient Temperature Range | -30 °C to +55 °C |
| Maximum Viscosity | 21 mm²/s |
| Power Consumption | Cold: 11 W; Warm: 10 W |
| Switching Time (Opening) | 10 to 100 ms |
| Switching Time (Closing) | 100 to 200 ms |
| Electrical Connection | Form A plug according to DIN EN 175301-803 |
| Degree of Protection | IP65 with cable plug (e.g., Type 2518) |
| Installation Length | 58 mm |
| Total Weight | 0.5 kg (DC version) |
| Conformities and Approvals | CE, UBA drinking water assessment principles, WRAS/WRC |
Sectional View and Material Specifications
| Item | Component | Material |
|---|---|---|
| 1 | Nut | Steel (thick-film passivated acc. to RoHS) / Stainless steel 1.4305, PTFE-coated |
| 2 | Coil | Polyamide (PA) |
| 3 | Stopper | Stainless steel 1.4113 |
| 4 | Shading ring | Copper (Cu) for brass bodies (AC only; not fitted on DC article 20043587) |
| 5 | Magnetic core | Stainless steel 1.4113 |
| 6 | O-ring | FKM |
| 7 | Plunger seal | EPDM (Ethylene-propylene-diene rubber) |
| 8 | Bonnet | PA6 (Polyamide 6) |
| 9 | Cover | Stainless steel 1.4301 (DN 10 to DN 25) |
| 10 | Spring | Stainless steel 1.4310 |
| 11 | Diaphragm | EPDM (Ethylene-propylene-diene rubber) |
| 12 | Diaphragm support | PPS GF40 combined with brass parts |
| 13 | Valve body | Brass |
Dimensions and Mounting Geometry
| Dimension Parameter | Value for DN 13 G 1/2 Brass |
|---|---|
| Total Height (A) | 82.6 mm |
| Height from Port Centerline to Top (B) | 95.9 mm |
| Width Across Body (C) | 44.5 mm |
| Depth Across Actuator (D) | 56.7 mm |
| Port Centerline Height (E) | 27.25 mm |
| Thread Engagement Depth (F1) | 14 mm |
| Thread Specification (G 1) | G 1/2 |
| Port-to-Port Length (L) | 58 mm |
| Wrench Flat Width (SW) | 27 mm |
| Coil Size Code | 6 (solenoid width 40 mm) |
Electrical Data and Power Consumption
Article 20043587 is powered by 12 V DC with a permitted supply tolerance of ±10%. It incorporates a size 6 (40 mm width) polyamide solenoid coil without Kick and Drop electronics.
| Coil Variant | Inrush Power (Cold) | Holding Power (Cold) | Holding Power (Warm) |
|---|---|---|---|
| Size 6 (40 mm) DC | — | 11 W | 10 W |
| Size 5 (32 mm) AC | 34–38 VA | 14 VA / 8 W | — |
| Size K (42 mm) DC | — | 21 W | 16 W |
Duty Cycle and Thermal Behaviour
The solenoid actuator is rated for 100% continuous duty (ED). Continuous energization produces surface heating. Keep the valve body away from combustible materials and avoid touching uninsulated surfaces during operation.
Installation and Commissioning Guidelines
Pressure and Electrical Safety
- Relieve pipeline pressure and vent fluid lines completely before loosening fittings or servicing the valve.
- Switch off the electrical power supply and secure it against reactivation before handling wiring or the coil assembly.
- Mounting Position: Install the valve in any spatial orientation. Mounting upright with the solenoid actuator on top is recommended to minimize particulate settling in the core guide tube.
- Pipeline Cleanliness: Flush supply lines thoroughly prior to mounting. Install an upstream dirt trap or strainer with a mesh size ≤ 500 µm to prevent blockage of the pilot channel.
- Body Piping: Check the flow direction arrow cast into the brass body. Use an open-end wrench on the body flats (SW 27 mm). Do not use the solenoid housing as a lever arm.
- Wiring the Cable Plug: Insert the connector seal and tighten the central plug screw to a maximum torque of 1 Nm. Connect the protective ground conductor (PE) and check electrical continuity between the solenoid ground terminal and the brass valve body.
Solenoid Mounting and Tightening Torques
- Slide the coil over the core guide tube and secure it with the top fixing nut using an open-end wrench.
- For coil size 6 (AC10 family, 40 mm width), tighten the nut to 5 Nm.
- Do not over-tighten or continue to rotate firmly seated nuts. Operating the solenoid without the valve body will cause rapid coil overheating and destruction.
Maintenance, Troubleshooting, and Spare Parts
Troubleshooting Matrix
| Fault Symptom | Probable Cause | Corrective Action |
|---|---|---|
| Valve fails to open | Coil circuit interrupted or shorted | Check power supply, plug wiring, and 12 V DC operating voltage |
| Core or plunger guide area contaminated | Disassemble coil assembly and clean core chamber | |
| Operating pressure out of specification | Verify process pressure is within 0 to 10 bar range | |
| Valve fails to close | Pilot control orifice in diaphragm blocked | Inspect and clean pilot hole and valve interior |
| Foreign matter under valve seat | Disassemble housing cover and flush sealing surfaces | |
| Worn or deformed diaphragm | Replace diaphragm seal assembly using genuine spare kit |
Spare Part Sets
Bürkert supplies wear-part replacement sets for Type 6213. Specify the set code and the device article number (20043587) when ordering:
- SET 1: Plunger, return spring, and associated internal O-rings.
- SET 3: Complete diaphragm assembly with PPS support and guide components.
- SET 7: Comprehensive valve overhaul kit including seals, core guide parts, and fixing fasteners.
Compatible Accessories and Electrical Plugs
| Accessory Description | Product Code / Type | Electrical Data | Article Number |
|---|---|---|---|
| Cable Plug Form A DIN EN 175301-803 (standard) | Type 2518 | 0 to 250 V AC/DC, unshielded | 314802 |
| Cable Plug Form A with LED indicator | Type 2518 | 12 to 24 V AC/DC | 314812 |
| Cable Plug Form A with LED and varistor | Type 2518 | 12 to 24 V AC/DC | 314820 |
| Cable Plug Form A without wiring (ATEX Cat. 3 GD / UL) | Type 2509 | 0 to 250 V AC/DC | 137943 |
| Electronic Timer Plug (Analogue) | Type 1087 | 10 to 30 V AC/DC (1087-A-BCH-UC-28) | 348828 |
| Electronic Timer Plug (Digital) | Type 1087 | 10 to 48 V AC/DC (1087-A-BFW-UC-29) | 348830 |
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