API 610 VS4 Pumps - Vertical Sump Pumps

Amarinth API 610 VS4 Pumps 12th edition V Series, the vertical sump pumps are designed and manufactured for a number of applications plus pump configurations including oily water separation, storm water and wash down sumps and Meg 75% with H2O sumps. The VS4 pumps are typically found in the utility areas of oil & gas production and refineries, though they can be used for other applications. Each pump is designed to fit sump depths of up to 6.0m as standard, although bespoke designs of up to 10m have been supplied. V Series pumps are independently verified, fully ATEX compliant and conforms to the VS4 API 610 centrifugal pump standard put forward by American Petroleum Institute (API).

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Using modern computer aided design software the pumps are designed as a heavy duty, minimal wear, long life pump. Conceived as a modular design, with a number of options available, ensures full compliance with a customer's exact requirements and specifications. Finite element analysis is extensively used to reduce resonance and vibration.

The pumps can be fitted with a variety of proprietary components, i.e. seals (including gas running), motors (IEC and NEMA) and couplings from all the major manufacturers to cater for customers site preferences. Double mechanical seal arrangements can be fitted with a seal support system attached. This can be supplied by Protect System, which is designed and manufactured by Amarinth, or another manufacturer's system can be fitted.

To complete the package a full range of standard material options from SG iron and stainless steel, to super duplex and hastelloy are available to match your process fluid. NACE and NORSOK compliant materials are also available. Standard documentation packs including manufacturing data books, material certification, installation and operating manuals are available to suit the application. Performance testing to API 610 / ISO 13709 and various NDE (non destructive examination) and NDT (non destructive testing) options are offered to ensure full compliance to our customer's specifications. Alternative bespoke packages can be tailored to fit your exact requirements.

For more information about this product please get in touch using one of the methods below.

Hydraulic Performance

Amarinth V Series pumps can be fitted with fixed or variable speed drivers from any manufacturer. The overall V Series hydraulic coverage chart is shown on the left. More detailed hydrualic coverage charts list individual pump designations at 2 pole & 4 pole speeds. Specific duty curves will be provided with all quotations.

Use the slider at the bottom of the images to select the hydraulic coverage chart you're interested in & then launch the relevant pdf to review the coverage charts in more detail.

Drawings & Visualisations

A number of images in various pump configurations are provided to help you visualise our A Series product including:

Isometric view
Exploded view
General arrangement
Sectional arrangement

Select an image below using the slider at the bottom and then launch the relevant pdf.

Other product details and photo’s can be found in our library.

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General description

A range of API 610 VS4 vertical long shaft single stage centrifugal end suction sump pumps manufactured in a variety of alloys. Designed to match exact customer requirements with lengths available up to 6m sump depth as standard.


Heavy duty modular design maximising flexibility to suit customer’s application.

Design methodology

Advanced computer techniques including 3D modelling, FEA & CFD

Design standards

API 610 12th edition / ISO 13709:2009
ATEX EC-Directive 2014/34/EU

Design pressure rating

20 bar g @ 20°C

Operating temperature

-40°C to 100°C (pressure containing parts)

Design temperature

150°C (standard construction)

Flow rate

Up to 500m³/h

Differential head

Up to 175m


Up to 3600 rpm

Support plate configurations & sizes

ANSI mount circular flange: 20" & 24"
ASME B16.47 Series A circular flange: 30" to 42"
ASME B16.47 Series B circular flange: 30" to 42"
Circular plate: 20" to 42"
Rectangular plate: 800mm x 550mm to 1450mm x 1000mm

Pump sump depth

Min standard pump length: 0.65m
Max standard pump length: 6.0m

Pump hydraulic frame sizes

040x025x145 to 250x200x410

Design life

25 years (3 years uninterrupted operation)


Amarinth V Series pumps are available in a variety of materials as standard which include the following pump / impeller combinations.

Other alloys, including NACE compliant materials are available on request and our foundries are NORSOK approved.

In addition we offer a full range of NDE & NDT options along with full component traceability to ensure compliance to your exact requirements.

Materials Casing Impeller
A8 - SS 316L / SS 316L ASTM A351 CF 3M ASTM A351 CF 3M
I1 - Cast Iron / Cast Iron ASTM A278 Class 30 ASTM A278 Class 30
S8 - Carbon Steel / SS 316L ASTM A216 WCB ASTM A351 CF 3M
S6 - Carbon Steel / 12% Cr SS ASTM A216 WCB ASTM A217 Gr CA 15
D1 - Duplex SS / Duplex SS ASTM A890 Gr 4A (UNS J92205) ASTM A890 Gr 4A (UNS J92205)
D2 - Super Duplex SS / Super Duplex SS ASTM A890 Gr 6A (UNS J93380) ASTM A890 Gr 6A (UNS J93380)
Hastelloy B / Hastelloy B ASTM A449 Gr N 7M ASTM A494 Gr N 7M
Hastelloy C / Hastelloy C ASTM A494 Gr CW 12MW ASTM A494 Gr CW 12MW
Monel / Monel ASTM A494 Gr M35 1 ASTM A494 Gr M35 1
Titanium / Titanium ASTM B367 Gr C-2 ASTM B367 Gr C-2