Valve proving system VDK 200 A S02/S06 Dungs
- These valve proving systems VDK 200 A S02 may be used with any other valve whose tightness in counter-flow direction excludes by construction a leakage in flow direction.
- Device operates independent of inlet pressure.
- Test volum ≤ 20 l.
- Setting possible on site. The complete test procedure is defined.
- Release time: 10 ÷ 26 s.
- Tightness or leaks are displayed by a LED.
- Electrical connection at screw terminals via PG 11 cable entry.
- VDK 200 A S02 is suitable for all Dungs valves according to EN 161 Class A.
- The VDK can always be used with systems with a burner
capacity < 500 kW or a test volume < 6 l. If the system has a burner capacity > 500 kW or a test volume > 6 l, the VDK 200 A S 02 can be used only if the burner capacity is higher than the minimum burner capacity specified in the diagram (see lower). - Suitable for gases of gas families 1, 2, 3 and other neutral, technical burnable gases.
Defining the minimum burner capacity:
For the images that aren't clear move the mouse over them to zoom.
1) Determine the test volume (see. manuals)
2) Test volume - Inlet pressure curve.
3) Inlet pressure curve - Reading the minimum burner capacity.
4) The VDK can be used if the burner capacity is higher than the read minimum burner capacity.
Technical specifications VDK 200
| Type valve proving system | Code | Voltage (V) | Frequency (Hz) | pmax (mbar) | Ambient temp. (oC) | Max. number of test cycles | Release time (sec) | Degree of protection |
|---|---|---|---|---|---|---|---|---|
| VDK 200 A S02 | 211229 | 240 | 50 | 360 | -10÷60 | 15/h | 10÷26 | IP 40 |
| VDK 200 A S02 | 211222 | 230 | 50 | |||||
| VDK 200 A S02 | 211927 | 120 | 60 | |||||
| VDK 200 A S02 | 211224 | 110 | 50 | |||||
| VDK 200 A S02 | 211226 | 230 | 50 | |||||
| VDK 200 A S02 | 226081 | 230 | 50 | |||||
| VDK 200 A S02 | 226082 | 230 | 50 | |||||
| VDK 200 A S06 | 253734 | 120 | 60 | - | - | - | - | NEMA 12 |
Dimensions valve proving system (mm)
VDK 200 Function principle
VDK operates according to the pressure build-up principle. The program module starts to function when heat is requested. Test is performed depending on the burner functional procedure:
- Test prior to burner start or
- Test during pre-purge time or
- Test after burner shut-down.
Program flowchart VDK 200
- Idle state: Valves V1 and V2 are closed.
- Pressure build-up: The internal motor pump increases the gas pressure in the test section by about 35 mbar compared with the pressure arising on the inlet side at valve V1. During the test period (pump period), the installed differential pressure switch monitors the test section for leaks. When the test pressure is reached, the motor pump switches off (end of test period) and the yellow LED flashes until the contact is released. The release time (max. 26 s) is dependent on the test volume (max 20 l) and inlet pressure (max. 360 mbar). If the test section is leak-tight, the contact is released to the automatic burner control after 26 seconds and the yellow LED comes on. If the test section is leaky or if the pressure rise by +35 mbar is not reached during the test period (max. 26 s), the VDK 200 A S02 switches to fault. The red signal lamp lights as long as the contact is released by the regulator or thermostat (heat request).
- An automatic restart is performed on short-term voltage failure during the test or in burner mode.
Prices
| Code | Type | Prices without VAT |
|---|---|---|
| 211229 | Valve proving system VDK 200 A S02 | 0.00 |
| 211222 | Valve proving system VDK 200 A S02 - In Stock | 0.00 |
| 211927 | Valve proving system VDK 200 A S02 | 0.00 |
| 211224 | Valve proving system VDK 200 A S02 | 0.00 |
| 211226 | Valve proving system VDK 200 A S02 | 0.00 |
| 226081 | Valve proving system VDK 200 A S02 | 0.00 |
| 226082 | Valve proving system VDK 200 A S02 | 0.00 |
| 253734 | Valve proving system VDK 200 A S06 | 0.00 |
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