The flagship differential-pressure flow element to the ISO 5167 international standard
DH-OF Series Orifice Plate
The orifice plate is the most widely used differential-pressure flow element; its simple construction and high reliability have made it the standard flow measurement device at industrial sites worldwide.
The Daehan Instruments DH-OF Series fully complies with the ISO 5167-2 international standard and guarantees stable quality backed by 35 years of manufacturing experience and over 2,000 installations.
| Model | Pipe Diameter | Materials | Pressure rating | Features | Download |
|---|---|---|---|---|---|
| DH-OF100 | DN25 ~ DN100 | SS304, SS316L | Class 150~300 | Small-bore pipes, general process | 📄 Spec Sheet |
| DH-OF200 | DN100 ~ DN300 | SS316L, Hastelloy | Class 300~600 | Medium-pressure/high-temperature plants | 📄 Spec Sheet |
| DH-OF300 | DN300 ~ DN600 | SS316L, Duplex | Class 600~900 | Large-diameter, high-pressure applications | 📄 Spec Sheet |
| DH-OF500 | DN600 ~ DN1500 | Alloy steel, Inconel | Class 900~2500 | Very large diameter, power/petrochemical | 📄 Spec Sheet |
| DH-OF-RTJ | DN50 ~ DN600 | SS316L, Monel | Class 1500~2500 | Ring Type Joint, ultra-high pressure | 📄 Spec Sheet |
Download detailed specifications for all models at once
📊 Download Full Model Comparison (PDF) 📞 Request Custom Spec ConsultationThe most common type, with a circular bore at the pipe center
Bore at the bottom of the pipe prevents solids settling
Semicircular opening suited to slurries and dirty fluids
Boiler feedwater, main steam and fuel flow measurement
Refining process and chemical reactor flow measurement
Raw water and chemical dosing flow at water treatment plants
All orifice plate technical documents in one place
Specialists with 35 years of experience will propose the right solution
