A manufacturer of hydraulic valve pressure testing equipment in Oubei town, Wenzhou, Zhejiang — the company behind the KY series of valve test benches.
KANGYUAN is the brand of Kangyuan Fluid Control (Zhejiang) Co., Ltd (康源流体控制(浙江)有限公司), a Chinese manufacturer of hydraulic valve pressure testing equipment. The company designs, fabricates, assembles, wires and pressure-tests its machines at No.137, SanPu road, HouYang, OuBei town, WenZhou, Zhejiang, and sells them under the KY series name. The company has been building valve testing equipment for more than 20 years, and works as a manufacturer rather than a trading company.
The range has six machine families. The KY series hydraulic valve test bench (KY-100 to KY-1000) covers flange-connected valves from DN15 to DN1000. The KY-Z immersed bench lowers the workpiece into a water pool and turns it through 90° for gas-pressure testing, and a combined small-caliber immersed version covers small valve batches. The KY-A series (KY-A/100 to KY-A/800) is built for large-caliber welded and threaded power-station valves. The KY-T series (KY-T300 to KY-T2000) handles flanged and wafer butterfly valves, including disc opening and closing and electric actuator torque testing. The KY-B vertical machine takes flanged, welded and threaded valves with either clamp-jaw or top-pressure clamping.
Auxiliary machines complete the line: the KY-L hydraulic hammer, a hydraulic valve grinder and an automated pipeline clamping machine. Every machine integrates hydraulics, electromechanics, pressure testing and test-medium storage and circulation in one system, and can be ordered with a computerised test-data management package — pressure sensors, PLC, liquid-crystal touch screen, printing and CF-card storage.
The company states that it works to GB/T13927-92 (general valve pressure test), API 598 (valve inspection and test) and the ISO 9000 quality management system, among other relevant standards. It states that its equipment serves valve manufacturers, petrochemical plants, natural gas engineering, power plants and water supply and drainage, and that machines are in use in the USA, Germany, Canada, Spain, the Netherlands, the UAE, Japan, South Korea, Indonesia and Taiwan region.
All six families are built in the same works and share the same approach to clamping and sealing. The valve type, size range and test medium decide which one is quoted.
| Family | Models | Valves it is built for | Notes |
|---|---|---|---|
| KY Series Hydraulic Valve Test Bench | KY-100 to KY-1000 | Flange-connected gate, globe, check and similar valves, DN15 to DN1000 | Flange end-face sealing with clamp jaws on the flange back; 90° turnover; 0-6.3 MPa regulating range; 3.0-31.5 MPa boost; 380 V, 50 Hz, 2.2-7.5 kW |
| KY-Z Series Immersed Hydraulic Valve Test Bench | KY-Z series | Flange-connected valves tested immersed in a water pool | Clamping table lowers into the pool and turns through 90° for gas-pressure seat testing; medium water or air |
| KY-Z Series Combined Small-Caliber Immersed Test Bench | KY-Z series | Small-caliber flange valves, in batches | Combined clamping and control unit for a compact footprint |
| KY-A Series Large-Caliber Power-Station Valve Test Bench | KY-A/100 to KY-A/800 | Large-caliber welded and threaded power-station valves, DN15-100 up to DN400-800 | Oil pump working pressure 0-6.3 MPa; oil cylinder up to 31.5 MPa; 380 V, 50 Hz, 2.2-7.5 kW |
| KY-T Series Hydraulic Butterfly Valve Test Bench | KY-T300 to KY-T2000 | Flanged and wafer butterfly valves | Shell and seat pressure tests plus disc opening and closing and electric actuator torque tests; synchronous clamp-jaw clamping |
| KY-B Vertical Hydraulic Valve Test Bench | KY-B | Flanged, welded and internally or externally threaded valves | Clamp-jaw or top-pressure clamping; upper cross-beam swings back 90°; medium water, air or kerosene |
Auxiliary machines: KY-L hydraulic hammer, KY hydraulic valve grinder and an automated pipeline clamping machine.
Valve type, size range, pressure class, flange standard, body shape and the number of valves per shift decide the family and the model: a KY bench, a KY-Z immersed bench, a KY-A power-station bench, a KY-T butterfly bench or the KY-B vertical machine. Sealing plate and clamp jaws are made for your flange face rather than for a nominal bore.
The hydraulic system, the electromechanical clamping and control, the pressure test circuit and the test-medium storage and circulation are designed as one machine. On the KY bench a high-pressure pump and a large-flow low-pressure water pump are built into the unit, and the test medium is stored and recirculated from the machine's own tank.
Because the valve is sealed on the flange end face and held by clamp jaws on the flange back, no external force influences the result, and the clamped valve can be turned through 90° mid-test. That is what makes gas (air) seat-tightness testing practical on the KY and KY-Z machines.
Machines can be ordered with a data package built on pressure sensors, a PLC, a liquid-crystal touch screen, printing and CF-card storage, so each test can be recorded rather than written up by hand. Machines supplied without it work from analogue or digital gauges, and the choice is made at quotation stage.
The company states that its equipment serves valve manufacturers, petrochemical plants, natural gas engineering, power plants and water supply and drainage, and that its machines are in use in the USA, Germany, Canada, Spain, the Netherlands, the UAE, Japan, South Korea, Indonesia and Taiwan region, as well as across China.
诚信通天下，质量保未来
Integrity connects the world, quality ensures the future.
Unclear scope is the most common source of dispute on a machine order, so we state the boundary before the quotation rather than after it.
These are the questions that separate a machine built for your production from a machine built for a catalogue photograph.
Test pressures, hold times and acceptance criteria are always agreed against the specification you provide. Any capacity figure given before that stage is an indicative range — the final specification is confirmed in the technical proposal for your valve. KANGYUAN builds and proves the machine; the valve specification stays with you and your customer.
Send your valve type, size range, test pressure and the standard you test against. You will get a technical proposal naming the KY series family and model, with layout, sealing arrangement and lead time.
