Vacuum Furnaces
In addition to the vacuum pumps used, the valve technology used in vacuum furnaces is decisive for process efficiency and quality. In addition to prec...
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62.8 HV Gas Dosing Valve
Outstanding Controllability of Pressure in Vacuum Chambers through the Gas Flow
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Reproducible Precision Over Exceptionally Large Pressure Ranges
The main requirements of a modern automated Gas Dosing Valve are the degree of its controllability and its ability to reliably and precisely follow a predefined flow setting. The 62.8 HV Gas Dosing Valve series delivers both.
The 62.8 series is driven by a stepper motor and is able to control the pressure in a range from < 1 x 10-8 mbar to 3 bar at any level to a very fine degree.
The flow characteristic from the initial opening to full conductance can be fully controlled at any pressure level making the 62.8 series outstanding in its operational range, providing just one valve solution where normally several different valves would be needed.
The series also provides unprecedented controllability. The special isolation and controlling system of the 62.8 – a needle and plate mechanism allow very smooth opening characteristics that avoid any pressure change peaks even at very low conductance.
The chosen flow characteristic can be defined via a fixed setting or they can be operated in a dynamic setting where the 62.8 is connected via its controller to a pressure sensor in the process.
Due to its O-ring sealed feedthrough the number of dynamic seals is limited to just the plate seal, increasing the valve reliability and availability by reducing servicing needs. Tested in many of demanding applications under various process conditions, the 62.8 series has proven its outstanding performance.
DN 16
The 62.8 HV Gas Dosing Valve is available in stainless steel with ISO-KF for DN 16. The standard bonnet seal is FKM but the material can be adjusted if special applications are requiring this.
With the Control Performance Analyzer a software to be run on any PC, laptop or tablet the 62.8 performance can easily be monitored and analyses to adjust the valve settings to the required process parameters.
Key Features of the 62.8 HV Gas Dosing Valve
Features:
- Outstanding wide flow control range
- Outstanding controllability at very small conductance
- Integrated power failure shut-off function (option)
- CPA software to read/write valve settings
Benefits:
- Outstanding process controllability
- A single valve solution for different pressure regimes
- Excellent reliability and lifetime
- Low cost of ownership
- Easy adjustments to process requirements
Technical data
| Sizes | DN 16 mm (5⁄8") | |
|---|---|---|
| Actuator | Stepper motor | |
| Body Material | Stainless Steel | |
| Feedthrough | Rotary Feedthrough | |
| Standard Flanges | ISO-KF | |
| Leak Rate1) | Valve Body, Valve Seat | < 1 × 10-9 mbar ls-1 |
| Pressure Range1) | < 1 × 10-8 mbar to 3 bar (abs) | |
| Differential Pressure on the Plate | ≤ 3 bar | |
| Temperature | Ambient | ≤ 40 °C |
| Material | Valve Body Needle Filter Gate |
AISI 304 (1.4301) AISI 304 (1.4301) AISI 316L (1.4404) AISI 316L (1.4435) |
| Seal | Feedthrough Gate Dosing nozzle Nozzle fixation Filter |
FKM FKM PTFE FKM FKM |
| Mounting Position | Any | |
| Controllable Conductance | Minimum / Maximum | 5 x 10-4 / 900 mbar ls-1 (with 1 filter) 5 x 10-4 / 800 mbar ls-1 (with 2 filter) |
| Operating Time | Closing / Opening | ≤ 2 s / ≤ 1.7 s |
| Power Supply | 24 VDC | |
| Control | Digital | |
| Weight | 2.4 kg / 5.3 lbs |
1) Unheated on delivery.
