The KY-Z series covers two machines from KANGYUAN: the KY-Z immersed hydraulic valve test bench, and the KY-Z combined small-caliber immersed test bench. On both, the valve is clamped on a table that can be raised, lowered and turned through 90 degrees, and the test is run with the valve under water.
The KY-Z series takes the clamping and sealing arrangement of the KY range and puts the test piece under water. On the KY-Z immersed type the machine is delivered as three parts that are connected on site: the hydraulic pump station, the operating console, and the clamping table. The table carries the valve and moves up and down over the pool, so a valve is loaded at working height and then lowered into the water for the test itself.
Immersion changes what the operator can see. With the valve under water, a leak shows as bubbles at the point where it occurs instead of only as a pressure reading that falls. The catalogue gives the immersed arrangement, together with the 90 degree turning function of the clamping table, as the reason the KY-Z bench suits gas pressure testing in particular.
The immersed type is intended for the sealing pressure test and the body pressure test on flange-connected straight-through valves. High and low pressure water pump units are part of the machine, and the test medium is stored and recirculated.
The KY-Z series is built in two forms. Both work on the immersed principle; they differ in the size of valve they are intended for, and in the way the clamping and the pump station are arranged.
The immersed bench for the wider valve range. The clamping table lowers the valve into the pool and turns through 90 degrees, sealing is by flange end face with the clamp jaws behind the flange, and high and low pressure water pump units feed the test circuit. The catalogue carries no parameter table for this type, so its model range and dimensions are confirmed at quotation.
The small-caliber version of the immersed bench, built as a combined machine for small-bore valves and published in six models from KY-Z100 to KY-Z600. The complete parameter table for this series — spacing, strokes, flow, power, water tank dimensions, lift stroke and weight — follows below.
The combined small-caliber bench is the version of the immersed machine built for small-bore valves. It is published in six models covering DN15 to DN500, with the water tank, the lift stroke and the machine weight increasing with the model size.
| Parameter | KY-Z100 | KY-Z200 | KY-Z300 | KY-Z400 | KY-Z500 | KY-Z600 |
|---|---|---|---|---|---|---|
| Nominal diameter DN (mm) | 15–100 | 50–200 | 80–300 | 200–400 | 250–500 | 300–500 |
| Nominal pressure PN (MPa) | 1.6–32 | 1.6–32 | 1.6–32 | 1.6–15 | 1.0–15 | 1.0–15 |
| Maximum clamping spacing (mm) | ≤700 | ≤850 | ≤1100 | ≤1200 | ≤1400 | ≤1500 |
| Minimum clamping spacing (mm) | ≥200 | ≥250 | ≥280 | ≥350 | ≥450 | ≥450 |
| Axial stroke (mm) | ≤60 | ≤70 | ≤65 * | ≤105 | ≤105 | ≤105 |
| Radial stroke (mm) | ≤120 | ≤160 | ≤200 | ≤240 | ≤250 | ≤230 |
| Pressure-regulating range (MPa) | 0–6.3 | 0–6.3 | 0–6.3 | 0–6.3 | 0–6.3 | 0–6.3 |
| Flow rate (L/min) | 16 | 16 | 25 | 32 | 40 | 63 |
| High pressure / booster stage (MPa) | 3.0–31.5 | 3.0–31.5 | 3.0–31.5 | 3.0–31.5 | 3.0–31.5 | 3.0–31.5 |
| Oil pump pressure (MPa) | 0–5.0 | 0–5.0 | 0–5.0 | 0–5.0 | 0–5.0 | 0–5.0 |
| Voltage (V) | 380 | 380 | 380 | 380 | 380 | 380 |
| Frequency (Hz) | 50 | 50 | 50 | 50 | 50 | 50 |
| Power (kW) | 2.2 | 2.2 | 3 | 5.5 | 5.5 | 7.5 |
| Number of poles (P) | 6 | 6 | 6 | 6 | 6 | 6 |
| Water tank length L (mm) | 2200 | 2500 | 3050 | 3400 | 3500 | 3600 |
| Water tank width B (mm) | 730 | 820 | 1050 | 1270 | 1310 | 1380 |
| Water tank height H (mm) | 1100 | 1500 | 1900 | 2350 | 2500 | 2800 |
| Lift stroke (mm) | ≤500 | ≤800 | ≤1000 | ≤1300 | ≤1300 | ≤1500 |
| Weight (kg) | 2680 | 3580 | 4800 | 7200 | 7900 | 8800 |
* Confirmed against your valve data at quotation. The electrical components listed for the KY-Z range are JQX-10F/2E relays, YXC-100 electric-contact pressure gauges, JS14A time relays, LA19-110 push-button switches, Y112M-6 motors, NR2-25 thermal relays, CJZ-25[01] contactors, and 42L6 ammeters and voltmeters.
The hydraulic pump station, the operating console and the working clamping table are separate assemblies that are connected on site. That layout lets the pool and the clamping table be placed where the crane or the roller path reaches them, with the pump station and the console set back from the wet area.
The test piece is carried into the pool by the clamping table rather than being lowered in by hand, so the valve is clamped and sealed in the air and only then immersed. The table travels up and down, which is what makes the same machine usable for a visual check under water and for a normal pressure hold.
The clamping table is fitted with a 90 degree turning function. KANGYUAN gives this as the reason the immersed design suits gas pressure testing in particular, because it allows the test position required by the procedure to be reached with the valve still clamped.
Clamping is by flange end face: the clamp jaws grip the back of the valve flange and the sealing heads close on the machined flange faces. No external force is carried through the valve body while it is under test, so the sealing pressure and body pressure results are not influenced by the clamping arrangement.
The machine contains both a high pressure and a low pressure water pump unit. The low pressure stage fills the valve quickly, and the high pressure stage takes it up to the test pressure without the operator changing the rig between stages.
The test medium is held in the machine and recirculated instead of being drained to waste after every cycle. That keeps consumption and disposal down when the bench is running all shift, and it keeps the water level in the pool stable between tests.
The Chinese catalogue text for the KY-Z immersed type specifies water and air as the test media, selected by the user. The English text on the same catalogue page also lists kerosene; that entry appears to have been copied from the KY series page, so the medium for a KY-Z machine is confirmed at quotation.
A computer test data management system can be ordered with the machine, as on the rest of the KY range: pressure sensors, a PLC, an LCD touch screen, printing of the test record and CF card storage of the data.
KANGYUAN publishes no parameter table for the KY-Z immersed type on this page, because the catalogue does not print one: the pages that cover this machine carry its performance features, its structure drawing and its electrical diagram, but no dimensions and pressures. A table assembled without that data would be guesswork, so the parameters of this machine are confirmed at quotation instead. The combined small-caliber series above is a different machine and its table is published from the catalogue.
What is confirmed for the KY-Z immersed type from the catalogue is the scope of the machine:
Send the valve type, the size range, the face-to-face lengths and the test pressure you work to. KANGYUAN confirms the model, the clamping table size, the pool arrangement and the pump duty for your valves, and returns them in the technical proposal with the quotation.
KANGYUAN states that it works to the standards and systems below. They are quoted here as the manufacturer's own quality statement, and each machine is configured so that the pressures and hold times your procedure requires can be reached and held.
Test procedures follow GB/T13927-92, API 598 and whatever standard your own specification names.
The machines are used by valve manufacturers, in oil and petrochemical plants, natural gas engineering, power stations, and water supply and drainage works. Units from the KANGYUAN range are in service in the United States, Germany, Canada, Spain, the Netherlands, the United Arab Emirates, Japan, South Korea, Indonesia and Taiwan region, as well as elsewhere in Southeast Asia, the Middle East, India and Europe.
On both KY-Z machines the clamping table sits over a water tank and the valve is tested while it is submerged. The valve is clamped on the table, the table lowers the test piece into the water, and the test is carried out with the valve under water, so a leak shows as bubbles at the point where it occurs. The table can also be turned through 90 degrees, which is the position the catalogue gives for gas pressure testing. On the KY-Z immersed type the pump station, the operating console and the clamping table are connected on site.
Water and air. The Chinese catalogue text for the KY-Z immersed type specifies water and air, while the English text on the same page also lists kerosene; that line appears to have been carried over from the KY series page. The medium for a KY-Z machine is therefore confirmed with KANGYUAN at quotation, together with the circuit arrangement for each medium.
KANGYUAN gives the 90 degree turning function of the clamping table as the reason the immersed KY-Z bench suits gas pressure testing in particular. Sealing itself is by flange end face, with the clamp jaws gripping the back of the valve flange, so no external force is carried through the valve while it is under test and the result is not influenced by the clamping arrangement.
The KY-Z combined small-caliber immersed bench is published in six models from KY-Z100 to KY-Z600, covering DN15 to DN500, and its full parameter table is on this page. The KY-Z immersed type is the other machine in the family, and the catalogue carries no parameter table for it, so its model range, dimensions and pressures are confirmed with KANGYUAN at quotation. Send the valve type, the size range and the test pressure you work to, and the model, the clamping table size and the tank arrangement are confirmed in the technical proposal.
Yes. A computer test data management system is available as an option on the KY-Z series, as on the rest of the KANGYUAN KY range. It covers the pressure sensors, a PLC, an LCD touch screen, printing of the test record and CF card storage of the data. Without that option the machine is operated and read from the panel instruments.
Eight models from KY-100 to KY-1000 covering DN15 to DN1000, with the full catalogue parameter table published: spacing, strokes, pump pressures, power and machine weight for every model.
KY series details →
A vertical bench for flanged, welded and threaded valves, with clamp-jaw or top-pressing clamping. The same page covers the KY-L hydraulic hammer, the hydraulic valve grinder and the automated pipeline clamping machine.
KY-B and auxiliary machines →Tell us the valve sizes, the test pressures and the medium. Email, phone or WhatsApp — technical questions are answered by the people who build the machines.
