VS4 Pump
Your Professional VS4 Pump Supplier
Our factory has a complete portfolio covering pump R&D, manufacturing, sales, and after-sales service to best meet customer requirements. All key staff members have experience working at top-tier domestic and international pump companies. Our chief engineers and managers each have over 20 years of experience in the pump industry.
Production Market
We serve markets in Italy, France, Switzerland, and Russia. We have been authorized by the Aturia Group—a pump company with branches in France, Switzerland, and Italy—as their local representative for sales, assembly, and service.
Our Service
After equipment installation, we perform commissioning (debugging) of centrifugal pumps to ensure normal operation. We also provide operational training to customers, guiding them in the correct use, maintenance, and care of centrifugal pumps to help extend the service life of the equipment.
Understanding Customer Requirements
Through detailed communication in the early stages, we strive to fully understand each customer’s needs and usage environment, including product categories, specifications, performance requirements, and working conditions.
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Long Shaft Submergerd Volute PumpHP51/52 pumps were developed as Single-stage, single suction, submerged centrifugal pumps, with enclosed impeller, the shafts were supported with plain bearings in the pump casing and bearing...read more
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Long Shaft Submergerd Open Impeller PumpThe HP53/HP54 series is a single-stage, single-suction, vertical centrifugal pump featuring an open impeller or open impeller with auxiliary vanes, designed for superior handling of viscous,...read more
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Long Shaft Submergerd Auxiliary Impeller PumpHP55 is a high-efficiency submersible centrifugal pump designed for reliable performance in demanding applications. It features a single-stage or two-stage semi-open impeller with a single suction...read more
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Long Shaft Submergerd Vortex PumpThe HP56 is a single-stage, single-suction, vertical centrifugal pump featuring an advanced vortex impeller design, engineered for high-performance liquid handling in challenging environments.With...read more
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High Temperature Molten Salt PumpHP59 pumps are developed as Single-stage, single suction, submerged centrifugal pumps, with enclosed impeller, which designed to make sure that molten salt liquids can back into the tank...read more
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Submergerd Liquid Sulphur PumpHP62 pumps are developed as Single-stage, single-suction, submerged centrifugal pumps, with enclosed impeller, the shafts are supported with plain bearings in the pump casing and bearing spiders,...read more
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Multistage Submergerd PumpThe HP63 is a multistage, single-suction, vertical centrifugal pump designed to deliver exceptional performance in deep well and high-pressure applications. Engineered in compliance with ISO 5199...read more
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Long Shaft Submergerd Oil Lubrication PumpThe HP64 is a high-performance, single-stage, single-suction vertical centrifugal pump engineered to meet the most stringent industry requirements. With dual compliance to both API 610 and ISO...read more
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Phthalic Anhydride Submergerd PumpHP69 series phthalic anhydride pumps were developed as Multistage, single-suction, vertical centrifugal pumps with enclosed impeller and diffuser, Pump discharge pipe with a jacket for heating,...read more
Performance Parameters
|
Type |
Vertical |
|
Capacities |
2~1000 m³/h |
|
Heads |
4~150 m |
|
Temperatures |
-20~+120℃ |
|
Pressures |
~25 bar |
|
Common material |
Carbon steel, 12%Cr, 304SS, 304LSS, 316SS, 316LSS, duplex steel, super duplex steel, Hastelloy, 20# alloy, Monel alloy, titanium, etc. |

FEATURES
According API 610 (VS4).
Double volute casing above 80mm reduces radial loads.
Low NPSHr suits many duties.
Modular line shaft – Lengths up to 8m.
Easy maintenance Spacer coupling permits inspection of top bearings, replaceable wear plate.
Top mounted mechanical seal option.
Media or external lubrication option.
Space saving construction.
Circular or rectangular cover plate to suit.
Although there is no pressure at suction and discharge, in case of overpressure of flush fluid to splash to the air from the base, soft packing must be used.
Long shaft is machined in two sections or more, end of one shaft screwed rod, the other one is machined with inner screw, two shafts are connected with screws, outside fixed with joint key and shaft bush. Torque is transferred by joint key, thrust force is transferred by screwed rod, this improves coaxiality of the pump shaft, at the same time, make it more easier of machining the long shaft.
LY series pumps are adopted multiple points support, angle-contact ball bearing is used above the liquid, every short shaft under liquid is supported by sliding bearing, sliding bearing is fixed on the middle supporter, with which supporting pipes are connected.
Balance housing is made up of pump casing and middle supporter, there is balance pipe at the bottom of the housing to connected to the air, for releasing pressure and reducing thrust force of the pump set. At the same time, solid liquid can be passed through the balance pipe to prevent solid liquid leakage up from entering sliding bearing. Under the lower sliding bearing, there is packing seal to prevent solid liquid leakage up again.

Transfer solids and corrosive liquid as slurry pump.
Rolling mill.
Chemical process.
Sewage treatment.
Transfer pump for flammable and explosive liquids.
Performance range
Capacity Q 2-400m3/h
Head H 5-100m
Working temperature T -20~ +200°C
Safe and reliable connecting shaft structure.
Adopt multi-points support for the rotor component and pumps runs safely and reliably.
Adopt external or self-lubrication for sliding bearing.
The impeller has submerged into medium when the pump begins to run,so start up become easy without air evacuation.
Adopt two-runner casings(the diameter is graeter than 80mm).It is small of radial force of rotors component, of shafts deflection and of wear and tear from sliding bearings,so long service life.
The pump runs clockwise looking from the motor end.


All API material options.
OS-4,S-5,S-6,S-8,C-6,A-8,D-1,D-2, plus bespoke options.
High efficiency options for RO and power markets.
Composite wear parts, for improved efficiency and rotor dynamics.
Specialist Options: high speed over 6500 RPM, Interstage Take off Options.
FAQ
As one of the most professional vs4 pump manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy vs4 pump for sale here from our factory. Also, customized service is available.
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