Optional built-in safety relief device ● Optional integrated monitoring pressure regulating device● Simple pressure setting ● High pressure regulation accuracy ● Inlet pressure range: 8.6bar ● Outlet pressure range: 27-520mbar, multiple spring segments available ● Flow rate: 400Nm3/h ● Accuracy: ±2.5%  ● Especially suitable for direct-fired equipment ● Applicable to natural gas, air, and other gases ● Designed for economical pressure reduction control, suitable for residential, commercial, and industrial applications ● Precise regulation, sensitive shut-off, simple pressure setting ● Integrated overpressure and underpressure cut-off and safety relief devices ensure user safety ● Maintainable online, can be installed in any position ● Connection: 2" threaded, ● Material: Cast iron/WCB steel valve body ● Temperature: -29° to 66°C