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 |