Hopeet Safety Valves · Taichung, Taiwan · Since 1968
Precision under pressure.
We design, machine, assemble and test safety valves under one roof in Taichung — since 1968.
01 — Who we are
A valve maker, not a reseller.
Hopeet has made safety and relief valves since 1968. Almost everything inside a Hopeet valve is made right here.
02 — Machining
Cut from solid metal.
Raw brass is checked on a Hitachi spectrometer when it arrives, then machined on our own CNC lines.
02 — Machining
Five axes. One setup.
Complex bodies are finished on DMG MORI 5-axis machines, cutting more faces in every clamping.
02 — Machining
Robots load. People check.
Robots tend the lathes. Hardness, roughness and roundness are checked every two hours.
02 — Machining
Every part, our own.
We keep outside parts to a minimum, so nothing gets knocked about in transit between suppliers.
03 — Testing
Set to the label. Then tested.
A safety valve is only worth something if it opens at exactly the pressure on its label. Each one is set and leak-tested to API 527 on our own benches.
04 — The valve
SU-SSS safety valve.
Stainless steel, threaded inlet and outlet. This is the CAD model we machine it from — keep scrolling to take it apart.
04 — Inside
14 parts. One job.
Nozzle, disc, guide, spring, stem, adjusting screw and cap — and they all have to work the first time pressure climbs.
04 — How it works
How it opens.
The spring holds the disc down on the nozzle seat. When pressure under the disc beats the spring, the disc lifts and the excess vents out the side.
04 — How it works
Then it closes again.
Once the pressure drops, the spring puts the disc back on its seat and the system keeps running.
Not a render
The real thing, cut.
A Hopeet valve, sectioned to show the spring chamber, the threads and the seat.
05 — Traced
Tested. Traced. For five years.
Each valve’s test report and test footage are kept for at least five years. Scan it to open the report in our Cloud Test Report Center.
Makino a61nx · horizontal machining cell
Brass bodies on a tombstone fixture
DMG MORI DMU 50 · 5-axis
Robot-tended CNC lathe
Machined brass, ready to assemble
Set-pressure test fixture
SU-SSS · Hopeet CAD data
Sectioned valve
3D scan inspection
