Products / Single Screw Pump

Single Screw Pump

LG BN, LG RV and LG NM series progressive cavity pumps — direct, form-fit-function alternatives to major international brands, plus cross-compatible spare parts.

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Shanghai Li Gong Pump manufactures a full range of single screw pumps (progressive cavity pumps) — LG BN, LG NM and LG RV series — engineered as direct, form-fit-function alternatives to major international progressive cavity pump brands. Beyond complete pumps, we stock and manufacture cross-compatible rotors, stators, coupling rods, universal joints, drive shafts and mechanical seals for the international pump brands already installed at your site — so switching supplier doesn't mean replacing your equipment.

Building a screw pump fluid system, or need application advice? Whether you're engineering a complete progressive cavity pump dosing or transfer system, replacing rotors and stators on an existing brand, or unsure which configuration best suits your medium, flow rate and pressure — talk to our engineers. We'll recommend the right pump or design a customized system around your actual operating conditions. Talk to our team →

Product Series

Pump Series & Spare Parts

Click into each series for full details, performance data and installation dimensions.

RV Series

Micro screw pump for precision metering — compact, strong self-priming, metering accuracy better than ±1%.

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LGBN Series

Compact direct-coupled progressive cavity pump — up to 48 bar (96 bar bare-shaft), 0.01–500 m³/h, API 676 version available.

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LGNM Series

Classic modular progressive cavity pump — economical, on-site serviceable, two rotor/stator geometries.

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Spare Parts

Rotors, stators, seals, coupling rods and universal joints — including ODM parts substitutable for 3rd-party pumps.

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Rotors & Stators

Core Wear Parts, Manufactured In-House

Rotors, stators, coupling rods, universal joints and mechanical seals — for our own pumps and as cross-compatible replacements for major international brands.

Rotor & Stator Material Options

Applies across BN / NM / RV series.

Rotor
General duty	Carbon steel (hard-chrome plated), 2Cr13
Corrosion resistant	304/316L stainless, duplex 2205/2507
Sour service (H₂S)	Super-duplex 2205/2507, Inconel 625
Hygienic/pharma	Electropolished 316L (Ra ≤ 0.8 µm)

Stator (elastomer)
NBR	General oil/water media
EPDM	Hot water, steam, mild alkali
FKM (Viton)	Strong acid, hot oil
PTFE-composite	Extreme temperature / strong corrosives

Compatibility & Spare Parts

Cross-Compatible With Major International Brands

Rotors Stators Coupling Rods Universal Joint Assemblies Drive Shafts Mechanical Seals

Send us the brand and model of the progressive cavity pump you're currently running and we'll confirm cross-compatibility. Standard lead time 2 weeks.

Need a Specific Model or Spare Part?

Tell us the connection size, pressure, medium and — if replacing an existing pump — the brand and model, and we'll match or engineer a solution.

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