AX742X diaphragm type safety relief valve is installed in the building, water supply system and other water supply system pipeline, when the pressure in the water supply pipeline exceeds the set pressure of the relief valve, AX742X diaphragm type safety relief valve automatically opens to relieve the pressure, it can also be used as a pressure holding valve, in line with the water supply pressure upstream of the main valve. When the pipeline from the inlet end of the water supply, the water flow through the needle valve into the main valve control room, the export pressure through the conduit to the pilot valve, when the export pressure is higher than the pilot valve set value, the pilot valve closes, the control room to stop draining, at this time, the main valve control room pressure rises and closes the main valve, the export pressure is no longer rising; when the export pressure falls to the pilot valve set pressure pilot valve opens, the control room to the downstream of the water discharge, due to the drainage volume of the pilot valve larger than the water inlet of the needle valve, the pressure in the main valve control room decreases, and the inlet pressure opens the main valve; in steady state, the control room has the same water inlet and discharge, the opening degree is unchanged, and the outlet pressure is unchanged. Adjusting the pilot valve spring can set the outlet pressure.
Work Characteristics
- Stable pressure control. The pilot valve and main valve work continuously, and the downstream pressure change is continuous and smooth, with little influence from the inlet pressure.
- Easy to operate. Once the working pressure is set, the main valve automatically adjusts when upstream pressure or flow changes, maintaining stable downstream pressure.
- The valve body features a full-bore, straight-through, streamlined design. It minimizes hydraulic loss and delivers excellent energy-saving performance.
Scope of Application
Urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection and other fields.
Product Parameters
Product Model | AX742X-16Q |
Valve body material | Ductile Iron |
Nominal pressure | ≤1.6Mpa |
Applicable medium | Water and so on |
Applicable temperature | ≤80°C |
Product Size Reference
Nominal Diameter | L | H |
DN40 | 235 | 300 |
DN50 | 235 | 300 |
DN65 | 250 | 337 |
DN80 | 275 | 467 |
DN100 | 275 | 520 |
DN125 | 325 | 580 |
DN150 | 375 | 640 |
DN200 | 430 | 778 |
DN250 | 490 | 889 |
DN300 | 565 | 1010 |
DN350 | 655 | 1037 |
DN400 | 695 | 1264 |
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