Primary Pressure Regulating Valve (YOSHITAKE)

GPR-2000 Pilot operated type / Diaphram type
GD-20R Direct acting type / Ductile cast iron
GD-20RC Direct acting type / Ductile cast iron / Nylon coating
GD-21 Directacting type / Differential pressure regulating valve
GD-7R Direct acting type / Piston type
GD-4R Direct acting type / For low pressure