DYC-Q series low vacuum electro-magnetic pressure difference valve is a new vacuum valve which has been installed in the gas inlet of the mechanical pump. The working principle is the valve and pump should be connected in the same power . When the pump stops working or power supply is suddenly interrupted, the valve will depend on atmospheric and vacuum pressure on making the valve plate closes automatically, will be closed Vacuum system to maintain their vacuum, and the atmosphere through the throttle valve into the pump chamber in order to avoid pump oil return to Vacuum system. In this way, it protects the Vacuum system and is beneficial for the re-starting of mechanical pump.
The applicable active medium of this valve are air, non-corrosive gas.
Main technical performance:
| Scope (Pa) | 105～102 |
| Valve Leakage Rate(Pa.L/S) | ＜6.5×10-2 |
| Medium temperature (℃) | -25～+40 |
| Time for opening and closing the valve (S) | ≤3 |
| Rated voltage (V/Hz) | 220/50 |
| Installation | Vertical |
（KF)Outline dimension and connection size (GB4982)
| Model | Nominal Diameter (DN) | ΦW | ΦD | ΦB | H | L | Flange standard |
| DYC-Q16/KF | 16 | 60 | 30 | 17.2 | 115 | 63 | GB4982 |
| DYC-Q25/KF | 25 | 70 | 40 | 26.2 | 130 | 67 | |
| DYC-Q40/KF | 40 | 100 | 55 | 41.2 | 160 | 81 | |
| DYC-Q50/KF | 50 | 110 | 75 | 52.2 | 195 | 85 | / |
Connection and outline dimension (GB/T6070)
| Model | Nominal Diameter (DN) | ΦD | ΦB | H | L | n-d | Flange standard |
| DYC-Q16 | 16 | 60 | 45 | 75 | 63 | 4-M6 | GB/T6070 |
| DYC-Q20 | 20 | 65 | 50 | 80 | 67 | ||
| DYC-Q25 | 25 | 70 | 55 | 90 | 67 | ||
| DYC-Q32 | 32 | 90 | 70 | 100 | 75 | 4-M8 | |
| DYC-Q40 | 40 | 100 | 80 | 110 | 81 | ||
| DYC-Q50 | 50 | 110 | 90 | 123 | 85 | ||
| DYC-Q65 | 65 | 125 | 105 | 147 | 95 | ||
| DYC-Q80 | 80 | 145 | 125 | 147 | 102 | ||
| DYC-Q100 | 100 | 165 | 145 | 140 | 112 | 8-M8 | |
| DYC-Q125 | 125 | 200 | 175 | 185 | 121 | 8-M10 | |
| DYC-Q160 | 160 | 225 | 200 | 210 | 138 | ||
| DYC-Q200 | 200 | 285 | 260 | 240 | 170 | 12-M10 | |
| DYC-Q250 | 250 | 335 | 310 | 285 | 195 | ||
| DYC-Q320 | 320 | 425 | 395 | 310 | 241 | 12-M12 |
If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.
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