Jiangsu Longsheng Pump & Valve Manufacturing Co., Ltd.

Send the heat-exchanger and pipe-loop arrangement with the required circulation rate. Identify losses through heaters, fittings and any control elements, and distinguish normal operation from cleaning, start-up and changing concentration. If an axial-flow selection cannot provide the required head at that flow, ask the supplier to compare a mixed-flow selection using actual issued curves.

The ECP description specifies a single-stage cantilever mixed-flow construction. It identifies series-connected or multi-pass heating chambers, reverse-circulation and low-level evaporation arrangements, viscous concentrates and corrosive liquids containing some particles as application directions. The publication does not establish a quantified solids or viscosity allowance for every ECP size; provide those properties with the duty.

The published family envelope is 200–8,610 m³/h and 6–22 m head, with working pressure up to 1 MPa and temperature up to 170 °C. These are separate catalogue limits, not a single 8,610 m³/h at 22 m operating point or a guarantee that every material and seal can operate at all limits together. Request the selected curve, operating range and pressure–temperature rating for the offered construction.

ECP250 is explained as the family designation plus a 250 mm inlet/outlet size. The catalogue lists a connection-size direction from 150 to 800 mm and several metal/material options, including stainless steels, duplex, nickel-alloy and titanium directions. Specify corrosion chemistry, concentration, impurities, temperature and abrasion before agreeing an exact grade and the material of each wetted component.

The HZW-II page describes a cantilever rotor and front-opening maintenance arrangement intended to allow access without removing the pump body and connected pipework. It also describes a replaceable suction guide for abrasive service and packing or double mechanical-seal directions. Obtain a sectional drawing and confirm the offered seal, service access and replacement parts for your liquid.

Direct coupling, belt transmission and gearbox drive are listed across the HZW range, along with horizontal, vertical and suspended arrangements. The HZW-II page and family photograph emphasise belt transmission. Ask which construction is actually offered, its pulley ratio and pump speed, guards, foundation and alignment requirements; do not infer that every arrangement is interchangeable.

The two HZW-250 rows below show why the model designation alone is insufficient. The last column is shaft power, not a stated motor rating. Agree motor allowance against actual density, viscosity, starting conditions and operating range. Neither row is a promise for a different speed or process liquid.

SPP is described as mixed flow between axial and centrifugal directions, with a pull-out maintenance arrangement and oil-lubricated bearings. The catalogue includes process circulation and high-flow, low-head transfer of neutral or corrosive liquids, with some-particle service mentioned. State actual particle distribution, concentration, corrosion and viscosity, rather than interpreting that description as a universal slurry rating.

For SPP20-25, impeller A at 1,450 r/min is tabulated with a 270 mm impeller, 530 m³/h, 11.2 m head and 4 m required NPSH. This is one model/impeller/speed row. Required NPSH is a pump characteristic; it does not establish that the plant has enough available NPSH or that a 4 m suction lift is permissible.

That same row gives different motor powers for different liquid densities. Include the normal and highest density and concentration with the operating range. Obtain the selected motor and issued curve, and confirm flange standards, oil system, seal auxiliaries and assembly dimensions for the offered pump.

An evaporator circulation pump may receive liquid near its boiling condition. Provide vessel absolute pressure, liquid temperature and vapour pressure, minimum liquid level above the pump centreline, and the suction route and losses. Ask the supplier and process designer to check available NPSH against the selected pump’s required NPSH with an agreed margin over the operating range.

Describe start-up, concentration changes, crystal growth, cleaning and shutdown. These conditions can change liquid properties and seal requirements. Request the actual solids and temperature allowances, seal support and stopping/restart procedures for the offered configuration. The family’s application list is not an acceptance test for your process.

Large hot pipes also need their own support and thermal-expansion design. Obtain allowable nozzle loads and agree the support and alignment responsibilities. Broad catalogue statements about carrying pipeline loads should not replace a mechanical review of the complete installation.

The company profile identifies 江苏隆昇泵阀制造有限公司 in Xinqiao, Jingjiang and describes pumps, valves, pipeline parts and associated industrial components. It states casting, machining and material/testing capabilities. For a purchase, request the actual material traceability and inspection records relevant to the offered pump; the equipment list alone does not establish testing of an individual order.

Define the supply boundary for pump, motor, drive, baseplate, guards, seals and auxiliaries. Agree drawings, operation instructions, spare-part identification and installation/commissioning responsibility. Where certification or a witnessed test is a contract requirement, obtain current documents naming the actual contracting entity, site, scope and selected product.

Submit through KanBeng’s enquiry form with this factory named in your request.

Reviewed on 8 October 2026 from the company profile and dedicated ECP, HZW-II and SPP pages, including their original performance-table images. The suction guidance was cross-checked against Hydraulic Institute material. Historic certificates and platform listings are not treated as current registry or certification decisions. The examples keep speed, impeller and density conditions separate. Final suitability depends on the supplier’s issued selection for the actual process.

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