Jiangsu Longli Pump & Valve Manufacturing Co., Ltd.

Select the inlet and pumping principle before comparing nominal motor power. These catalogue directions address different supply conditions.

For example, a quotation for a pipe-fed liquid transfer pump will not settle the hopper geometry of a paste-handling installation. Conversely, an auger visible in a catalogue picture does not establish that every offered material will feed without bridging. Describe the inlet condition in the enquiry and ask for the drawing of the offered assembly.

Longli’s G70-1 entry describes a stainless-steel, electrically driven horizontal single-screw pump. The figures below belong to that entry, rather than to all G-series pumps. The product photograph illustrates horizontal assemblies; it does not identify the exact steel grade, stator compound or seal of a delivered unit.

The entry also labels a 30 m head value alongside its pressure figure. Head and pressure cannot be compared without the liquid density and the measurement basis. Keep the required duty in clearly stated units rather than treating that heading as a guarantee for every fluid.

The product title refers to pharmaceutical use, but the reviewed entry does not establish hygienic approval, a surface-finish specification or a validated cleaning procedure. For such an order, put the required material traceability, finish, seals and cleaning conditions into the procurement specification before accepting a stainless description as sufficient.

The feeding-pump illustration shows three horizontal arrangements with open hoppers and an auger at the inlet. That visible construction gives a buyer a useful starting point for material that needs help reaching the screw-pump element. It does not establish hopper capacity, screw dimensions or a universal solids limit.

There is a specific ordering-code conflict in the reviewed entry: its title says G45-2W, while the parameter text says G45-1. Ask for a consistent model designation and drawing before using its numerical table to size an order. The inlet arrangement can be discussed now; a guaranteed duty must refer to the actual offered model.

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

Longli publishes an equal-wall screw-pump stator entry identifying NBR rubber. This is a component material statement. It does not establish that every Longli stator, or the stator supplied with G70-1, uses the same formulation. The numerical duty on the component entry is not a pressure rating to transfer to every assembled pump.

Send the installed pump nameplate, rotor and stator identification, dimensional drawing and photographs of the mounting ends. Agree the pumping-element geometry, length, end connections and mating rotor with the supplier. A matching outside appearance alone does not establish interchangeability.

For the rubber selection, give the full liquid composition, concentrations, operating and cleaning temperatures, solids and cleaning agents. Ask for the offered compound and its suitability for those conditions. If the failed part has swelling, tearing or uneven wear, provide photographs and operating history so the replacement enquiry can address the cause as well as the part size.

The 2GH1400-15 entry presents a horizontal stainless twin-screw electric-drive assembly and describes lubricating liquids of different viscosities. This is a separate catalogue direction from the G single-screw and equal-wall stator entries. Stainless construction does not, by itself, establish compatibility with an arbitrary corrosive or non-lubricating liquid.

The reviewed parameter block contains malformed pressure and viscosity units. They are not silently converted here into a supposed pressure rating or viscosity limit. Ask for a corrected data sheet, the selected curve and the basis of the liquid properties before comparing this direction with another supplier’s twin-screw offer.

Longli’s August 2016 service note describes the head, stator, rotor, connecting rod, joint protection and seal box as parts of its single-screw disassembly sequence. That makes the withdrawal space and replacement-parts boundary practical purchase questions. Request the service drawing for the offered assembly and identify which wear parts, joint components and seal parts are included in the spare set.

The note calls for electrical isolation and care around mechanical-seal components. Use the supplied model-specific instructions for actual maintenance, lubricant selection and assembly. A historical general service article is not a substitute for the current instructions or an approved cleaning procedure for a particular rubber compound.

1. Fix the installation drawing

   Agree inlet/hopper position, connection details, base and drive arrangement, plus the space needed to withdraw the pumping element and service the seal.

2. Identify the wear-part set

   List rotor, stator, joints/boots and shaft-seal parts with their material and drawing references. Separate a spare component quotation from a complete replacement pump.

3. Agree acceptance evidence

   Specify the operating test conditions, selected flow/pressure basis, material documentation, nameplate identification and the manual supplied with the order. Include quantity, destination and delivery requirements.

The original company profile identifies Jiangsu Longli Pump & Valve Manufacturing Co., Ltd. in Xinqiao, Jingjiang and describes casting, machining and pump manufacture. A Jingjiang government inspection report published on 4 March 2022 independently lists the same Chinese legal name. Its entry records a 24 February 2022 visit with machining in operation and the paint room not operating at that time.

That dated observation supports the identity and historical manufacturing context. It does not establish current annual output or the performance of a supplied pump. The older company page’s experience and ISO references are not used here as a founding date or a current product certificate. For an order, ask for the documents relevant to the actual legal supplier, model and required scope.

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

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