Girdlestone 984 - API 610 Pump

The Amarinth equivalent of the Girdlestone 984 Vertical Long Shaft range of pumps consist of single stage, end suction, centrifugal pumps, robustly designed for wet sump applications and complying with API 610 Standards 7th edition, where applicable. The pumps are of modular construction and as standard can be supplied to suit sump depths of 0.5 to 10 metres. A wide variety of material and construction options enable pumps to be tailored to suit precise customer requirements for either onshore or offshore applications.

As industry uses an increasingly wider range of chemicals and volatile liquids, vertical long shaft pumps in wet sump installations offer an ideal means of handling these liquids safely and conveniently.

Practical design features enable routine maintenance to be carried out with minimal downtime. The pump drive end has been designed to maximise access to the thrust bearing/vapour seal, and allow axial adjustment of the impeller from the top of the pump, without the necessity to reset the seal assembly. The drive shaft design incorporates replaceable bearing sleeves, which also function as shaft couplings.

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. A heavy duty baseplate helps achieve low vibration and noise levels which in turn extends the pump's life and ensures maximum running time.

The pumps can be fitted with a variety of proprietary components (i.e. seals, motors and couplings) from all the major manufacturers to cater for customers site preferences. Pumps using 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 seal support system can be fitted.

To complete the package a full range of standard material options from cast 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 / 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.

Drawings & Visualisations


General description

A range of 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.


Front and back pullout design with metal to metal fits

Design methodology

Advanced computer techniques including 3D modelling, FEA & CFD

Design standards

API 610 / ISO 13709
ATEX EC-Directive 94/9/EC

Design pressure rating

16 bar g @ 20°C

Temperature rating

-40°C to 150°C

Flow rate

Up to 500³/h

Differential head

Up to 200m


Up to 3600 rpm

Support plate configurations and 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

Frame sizes

040x025x145 to 250x200x410

Design life

20 years (2 years uninterrupted operation)


Amarinth N 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 specific NDT and component documentation 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 A494 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