进口美国减压阀

美国MillerMl减压阀技术参数：

Steam, liquids and gases usually flow at high pressure to the points of use. At these points, a pressure-reducing valve lowers the pressure for safety and efficiency, and to match the requirements of the application. There are three types of PRVs.

• Direct-Acting. The direct-acting type operates with either a flat diaphragm or convoluted bellows. Completely self-contained, it does not need an external sensing line downstream to operate.
• Internally Piloted Piston-Operated. This type incorporates a pilot and main valve in one unit. The pilot valve has a design similar to the direct-acting valve. The discharge from the pilot valve acts on top of the piston, which opens the main valve.
• Externally Piloted. In this type, double diaphragms replace the piston operator of the internally piloted design. This increased diaphragm area can open a larger main valve, allowing a greater capacity per line size than the internally piloted valve.

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