Changsha Tongda Pump Industry Co., Ltd.

Changsha Tongda Pump Industry Co., Ltd. uses the Chinese company name 长沙同大水泵实业有限公司. Its current introduction lists supply equipment, sewage and centrifugal pumps, inline and metering pumps, together with sales and installation. The catalogue includes individual pump units, packaged supply systems, electrical cabinets and stainless-steel tanks. Decide which of those boundaries belongs in the order before comparing a price.

The company’s published management-system documents distinguish a registered address in Changsha from business and production addresses in Tianyi Economic Development Zone, Xiangtan County, Hunan. That distinction matters when agreeing the supplier, inspection location and delivery documents. It does not establish plant ownership, production capacity or the configuration of any particular photographed pump.

Tongda’s constant-pressure equipment description says its inlet draws from a storage tank or reservoir where municipal pressure is insufficient. The non-negative-pressure description instead connects directly to the municipal network where incoming pressure is available. The catalogue also separates a constant-pressure supply unit and GSK/BM/P variable-speed cabinets. A cabinet-only order is therefore different from a complete hydraulic package.

For a tank-fed installation, provide the available storage volume, operating water levels and pump inlet arrangement. For direct network boosting, provide incoming pressure and available flow at peak demand, together with the permitted connection conditions. Define the outlet pressure and demand profile in both cases, but do not assume the same source-water arrangement or uninterrupted supply.

The illustrated descriptions list 50/60 Hz and broad catalogue ranges. Select the actual pump count, curves, motor ratings, voltage, controller and vessel schedule in the quotation. Catalogue maximum flow and maximum head are not a paired duty point; a package photograph does not determine those ratings.

The stainless-steel multistage entry describes a non-self-priming vertical centrifugal arrangement, with a coupling between motor and pump shafts. It lists stamped and welded stainless flow-guiding components, inlet and outlet on the same horizontal line, and maintenance without disturbing the full pipe arrangement. These are useful layout and service questions for a replacement order.

Its technical image lists a catalogue flow range of 0.4–240 m³/h and a head range of 4–305 m. Those values cover the listed direction; they do not describe one operating point. The image labels −15 to 105°C as ambient temperature, so that figure is not adopted as a pumped-liquid temperature rating.

Send a paired flow/head requirement and the inlet pressure, fluid chemistry and temperature. Ask for the selected stage count, material grades, seal arrangement, motor specification and curve at the agreed speed. For an existing installation, attach the connection drawing and available motor-removal height. A stainless product label alone does not define all wetted materials or establish sanitary approval.

Tongda lists single-stage double-suction split-case, mixed-flow and submersible axial-flow pumps, as well as QJ borehole pumps and drainage/sewage variants. Its submersible product category also contains ZX and ZW self-priming listings. Treat the individual construction and installation drawing as the selection basis; the category heading alone is not a reliable instruction to submerge a pump.

For a surface installation, send the source water levels, suction-pipe layout, elevation and available maintenance space. For an axial or mixed-flow station, provide the required flow and head at the expected high and low water levels, the inlet structure and the proposed discharge arrangement. Request a curve and an installation drawing for the particular pump rather than transferring performance from a similarly named family.

The split-case catalogue photograph shows installed pumps, pipework and a walkway. It is useful for discussing valve and service access, but it is not evidence of the illustrated station’s capacity or a named customer. Replacement work also needs the flange positions, rotation, coupling and base dimensions, with the motor and pump treated as a matched assembly.

The QJ entry is specifically labelled cast-iron deep-well submersible equipment. The catalogue separately lists hot-water submersible pumps, oil-immersed QY pumps, WQK/QG cutter-equipped sewage pumps and a 304 stainless drainage/sewage direction. Those names describe different choices, not interchangeable versions of one universal submersible pump.

For a borehole, provide internal diameter, well depth, static and pumping water levels, required flow, discharge elevation, sand conditions and cable length. Request the complete pump-and-motor dimensions, stage selection, curve and electrical schedule. The QJ page calls for overload and short-circuit protection and isolation before lowering, lifting or servicing equipment. Have a qualified electrical designer specify earthing, cable protection and the applicable installation requirements.

For sewage duty, provide solids and fibre characteristics, sump dimensions, starting frequency, liquid temperature, required discharge duty and removal access. A cutter label does not establish a solids-passage rating. Ask for the selected impeller/cutter arrangement, guide or mounting system, cable entries, level controls and maintenance procedure.

The company hosts Chinese and English copies of quality, environmental and occupational-health management-system certificates. The Chinese copies identify the same company and cover centrifugal pumps, Class III, and accessories; the printed dates run from March 2024 to March 2027. For a purchase, obtain the current issuer record and confirm that the relevant production site and scope match the proposed order. A management-system document is not a product curve or a witnessed hydraulic test.

Its gallery also includes a pump-group energy-optimisation software copyright document registered to the company in April 2022. That document identifies software rights; it does not demonstrate a measured energy-saving percentage for an installation. Ask for the actual controller version, communication interfaces, permitted configuration access and commissioning settings when control software is part of the order.

The Hunan provincial government’s May 2013 notice names this company in a public notice concerning the 2012 contract-and-credit programme. This is a historical identity reference, not a current fulfilment guarantee. For acceptance, agree the tested pump duty, motor data, protection functions and delivered documentation independently of those company-history records.

Attach the existing nameplate and drawings for replacement work, or the site design inputs for a new system. State whether the order includes one pump, a pump-and-motor assembly, a cabinet, a complete supply package or installation. Keep the supplier’s equipment schedule and the installer’s work schedule explicit.

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