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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