API 674 Reciprocating Plunger Pumps

For high pressure applications, API 674 pumps are the cost-effective solution. These reciprocating plunger pumps typically are lighter and, with their vertical plunger configuration, occupy a smaller footprint than equivalent API 675 double diaphragm pumps.

Typical offshore process applications for API 674 pump skid packages include chemical injection, seawater and produced water injection, glycol circulation, scale squeeze, and MEG injection. We select API 674 pumps for many well service applications such as subsea trenching, cuttings re-injection, mud pumping, fracturing, well kill, and well stimulation. We have also designed and manufactured many pressure testing pump packages and BOP test systems.

API 674 Pump Package Currently in Build

We are currently building a waste injection pump skid for operation in ATEX Zone 2 hazardous areas. The unit is modular in design to allow installation onto an existing platform where deck space is limited. This allows dismantling in Worcester and rebuilding in situ. We will carry out all design, build and testing at our factory in Worcester, UK.

A DA2 (Design Approach 2) Study is an option chosen for this project. Design Approach 2 Studies allow us to model and analyse the acoustics of positive displacement pumping systems and their pipework. We are then able to predict pulsations and vibrations in the system, either confirming that the equipment will operate within accepted parameters, or highlighting issues which we can then address.

API 674 Pump Performance Options

There are numerous API 674 pump performance options, with different plunger sizes, to suit all process applications. A pump that has been very popular over the last six years is the HDP 20V variable stroke plunger pump. We recently introduced a larger model, the HDP 70V. These pumps generally comply with both API674 and API675. They allow a variable flow rate (0-100%) via electric, or manually adjustable stroke control, whilst the pump is on or off load, removing the need for a VSD. This provides the stroke/flow adjustment benefits of the more traditional double diaphragm pumps, but with the advantages of an equivalent API 674 plunger pump design with reduced weight and size. Find out more about the HDP 20V controlled volume injection pump.

If you require low flow/pressure chemical injection/dosing pump units, then visit our API 675 page.

API 674 Design Experience

You will see from the pictures that we have significant experience in designing compact process pump skids for vessels and platforms with restricted space or access. Our OffshoreLITE range includes API 674 reciprocating plunger pump units with a maximum weight of 4,500 kg and modular units at a maximum of 1,500 kg per module.

The API (American Petroleum Institute) is a standards-setting organisation.

Talk with our Team

Whatever your API 674 or process pumping application, we are here to help. Please call us on +44 1905 751790 or email sales@calder.co.uk.

  • Electric, diesel, pneumatic, or hydraulic drive.
  • Vertical pump configuration.
  • Horizontal pump configuration.
  • Variable flow pumps that do not require a VSD.
  • Local or remote control.
  • Data monitoring and logging.
  • HPHT High Pressure High Temperature compatibility.
  • Long-term preservation.
  • Suction and discharge dampers or resonators to control pulsation.
  • Packing seal oil system to reduce maintenance requirements.
  • Separate power end lubrication for low speed efficiency.
  • Pressure safety valve.
  • Skid – lightweight. All-round maintenance access.
  • Crash frame – lightweight and with a greater level of protection during movements.
  • Skid and hood – offers noise attenuation and protection from the environment.
  • Container – gives greatest protection and noise attenuation.