Jiangsu Leye Hydraulic Pump Co., Ltd.

The company introduction and footer identify Jiangsu Leye Oil Pump Co., Ltd. in Qidong and describe design, manufacture, component sales and engineering packages. They name machine builders and hydraulic-package companies as customers, with aftermarket service as another direction. The site’s page title uses a different enterprise name; confirm the Chinese contracting name shown here rather than assuming those names establish a documented corporate succession.

Original utility-model publication CN221957733U, announced on 5 November 2024, names 江苏乐液油泵有限公司 in Qidong as the patent holder. It concerns an axial-piston return arrangement using springs and connecting components. This provides an independent identity and technical-document reference; it does not establish that every catalogue assembly contains that arrangement, that it improves lifetime by a measured amount, or that the patent remains in force.

The company states that it has machining centres, CNC equipment and precision inspection equipment. Make the drawing, inspection and traceability requirements specific to the supplied component. General quality-system wording on the site is not a current certificate with an inspected holder, scope and validity; include those documents in the enquiry if required.

The CY description uses a rotating cylinder block and valve-plate distribution. Its explanation separates the hydraulic body from several control mechanisms. A pump with the same displacement but another control suffix can behave differently through a machine cycle: steady displacement, manual setting, pressure-related reduction and a staged reduction are distinct choices.

MCY14-1B is described with a fixed swashplate. SCY14-1B uses an external handwheel and variable piston to change the angle; the documentation says adjustment during work requires unloading. Treat that as an installation-specific operating procedure to agree with the machine integrator, rather than adjusting a loaded circuit based only on the catalogue.

YCY14-1B is described as pressure-compensated variable operation, with output following an approximately constant-power relationship over a defined range. MYCY14-1B uses internal or external control pressure for a staged reduction; the general description places its change at about 3–4 MPa. Specify the required starting and final pressures, low/high-pressure flows and control source on an issued curve. That descriptive range is not a fixed setting for every delivery.

The CY pages explain the designation using 160YCY14-1G: 160 mL/rev, nominal pressure 31.5 MPa and an increased-speed pressure-compensated variant. They give 160 L/min nominal flow at 1,000 r/min. That example does not turn the 10YCY14-1B page heading into a 160 mL/rev model, and nominal displacement flow is different from measured delivery under load.

Provide shaft speed, normal and peak pressure, the required pressure-flow curve and the intended working cycle. Ask for delivered flow and absorbed power at agreed oil temperature, viscosity and pressure, with efficiency and leakage accounted for. Do not choose motor power from displacement alone.

The 63YCY-B motor-unit and 160BCY electrical-control entries reproduce general CY material rather than a complete drive specification. Request motor rating, voltage/frequency, coupling, base, control supply and the actual circuit diagram. The brochure statement about changing a distribution plate for motor use is not permission to convert an installed pump without a specified motor configuration.

The HY160Y description identifies a swashplate axial-piston pump for an open circuit. It distinguishes continuous pressure up to 315 bar from momentary maximum pressure up to 400 bar. Agree the selected displacement, control option, speed, continuous load and permissible transient duration; the momentary maximum is not a continuous operating rating.

Its case-drain statement allows drain pressure no more than 0.5 bar above inlet pressure and no more than 2 bar absolute. Check the applicable issued manual and pressure reference before designing the return line. Include drain routing, tank pressure and restrictions in the circuit review; a discharge relief valve alone does not define case-drain conditions.

The page claims a CY-compatible mounting flange and SAE-style oil-port flanges. Compare dimensioned drawings, shaft, rotation, port position and control connections instead of treating that general statement as universal drop-in replacement. The parameter table is labelled theoretical, excluding mechanical/hydraulic and volumetric efficiency; ask for tested delivery rather than presenting it as measured output.

A2F456.1P1 is listed under fixed-displacement axial-piston pumps/motors. Its description specifies bent-axis construction for hydrostatic pump or motor service in open or closed circuits. For a pump, identify shaft drive and delivered flow; for a motor, identify inlet flow, pressure difference, required speed and torque. Confirm ports, direction, drainage and the exact pump/motor suffix; a shared family name does not settle those interfaces.

The OS-A4VSO page describes an open-circuit variable swashplate pump with through-drive construction and nominal pressure up to 35 MPa. Through-drive permits a combined-pump arrangement, which needs a specified coupling, rear-pump load and overall installation drawing. Its fire-resistant-fluid wording also states that operating parameters are reduced. Request the fluid-specific rating and seal compatibility rather than carrying the mineral-oil envelope into another fluid.

A7V160LV has a catalogue entry, but the accessible description does not provide a model-specific rating schedule. Use the exact designation when requesting current technical data; do not borrow another manufacturer’s A7V table or infer controller meaning from the letters. Decide between the listed directions using the machine’s circuit and an issued selection.

For a machine replacement, send the original full nameplate and drawing, including any control-block and motor-unit references. Compare shaft form, mounting pilot and bolt pattern, rotation viewed from the specified end, suction/discharge/control/drain connections and available clearances. Agree which existing pipes, couplings and control signals can remain and which need modification.

For a new machine package, divide the quotation into the hydraulic component, drive assembly and circuit integration. Agree oil grade, operating/starting viscosity, cleanliness and filtration, inlet supply, leakage return and cooling requirements using the selected manual. The catalogue’s application list is not a record of a completed project for your machine.

Acceptance should cover the issued pressure-flow/control curve, selected speed and oil conditions, leakage, adjustment response and the installed protection functions. Include serial identification, drawings, manuals, spare-part references and the destination service arrangement. A generic hotline or service statement does not guarantee overseas on-site support or a fixed response time.

Start with the machine task and whether this is a component replacement or a complete pump-and-drive order. A useful response should identify one configuration, its interfaces and its acceptance conditions, so competing offers can be compared on the same duty.

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