PN16
BURKERT 20072712 (Type 6281) is a servo-assisted 2/2-way diaphragm valve. A minimum differential pressure is always required for the valve to function. The standard brass body meets European drinking water requirements. To reduce electrical power consumption during operation, this model features coils with integrated Kick-and-Drop (KD) electronics featuring double coil technology. The valve can be supplied with manual operation for easy maintenance and commissioning.
Key Features
- Servo-assisted diaphragm valve up to DN 50
- Vibration-resistant, centrally screwed coil system
- Damped design for quiet closing
- Energy-saving double coil technology with kick and drop variant
General Technical Data
| Product properties | |
|---|---|
| Seal | NBR, EPDM, FKM |
| Body | Brass acc. to DIN EN 50930 - 6, stainless steel |
| Inner valve parts | Stainless steel, brass, plastic (PPS) |
| Orifice | DN 10...DN 50 |
| Thermal insulation class | Polyamide coil class B, Epoxy coil class H |
| Duty cycle | 100 % continuous operation |
| Switching time | Opening: 0.1...1.5 s, Closing: 0.2...4 s |
| Voltage tolerance | ±10 % |
| Degree of protection | IP65 with cable plug, cable connection and terminal box |
| Installation | As required, preferably with actuator upright |
Circuit Functions
| Symbol | Description |
|---|---|
 | Circuit function A (CF A) 2/2-way solenoid valve Servo-controlled Normally closed |
Material Specifications
| No. | Element | Material |
|---|---|---|
| 1 | Coil | Polyamide or epoxy |
| 2 | Stopper | Stainless steel 1.4113 |
| 3 | Shading ring | Cu (brass variant), Ag (stainless steel variant) |
| 4 | Magnetic core | Stainless steel 1.4113 |
| 5 | O-ring | NBR, FKM, EPDM |
| 6 | Core seal | NBR, FKM, EPDM |
| 7 | Spring | Stainless steel 1.4310 |
| 8 | O-ring | NBR, FKM, EPDM |
| 9 | Diaphragm | NBR, FKM, EPDM |
| 10 | Diaphragm holder | PPSGF40, DN 50: brass and stainless steel |
| 11 | Valve body | Brass acc. to DIN EN 50930 - 6 or stainless steel 1.4408 (CF8M) |
Dimensions
Standard Threaded Variant
Note
- Dimensions in mm
- The dimensions F1 and G1 apply to G thread.
- The dimensions F2 and G2 apply to NPT thread.
- The dimensions F3 and G3 apply to Rc thread.
Type Label
| 1 Type | 2 Circuit function |
| 3 Orifice | 4 Sealing material |
| 5 Body material | 6 PN |
| 7 Connection type | 8 Power |
| 9 Frequency | 10 Voltage |
| 11 Manufacture code | 12 Article number |
Safety Instructions
DANGER!
Risk of injury from high pressure in the system
- Before loosening lines or valves, switch off the pressure and vent the lines.
Risk of injury from electric shock
- Before reaching into the device or the system, switch off the power supply and secure it against reactivation.
- Observe the applicable accident prevention and safety regulations for electrical devices.
WARNING!
Risk of injury due to improper installation
- Installation must be carried out by authorised technicians only and with the appropriate tools.
Risk of injury from unintentional activation of the system and uncontrolled restart
- Secure the system against unintentional activation.
- Ensure a controlled restart after installation.
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