Flowserve WCC API 610 Multistage Barrel Pump

WCC horizontal multistage double-case barrel pump to API 610

The Flowserve WCC is a medium-duty horizontal multistage pump in a double-case (barrel) construction, built to ISO 13709 / API 610 and the Hydraulic Institute standards. It is intended for services where a single-stage pump cannot reach the required head or where the pressure and temperature call for a barrel casing rather than a split case.

The WCC name covers a small family: WCC itself, WCCD with a double-suction first stage, WCCO with opposed impellers, and WCC-T and WCC-TT turbine-driven arrangements. Seven Star LLC supplies the WCC range in Oman and the GCC as an independent supplier in Muscat; the exact variant is chosen from your duty data.

Please note that this page is built from the manufacturer’s published range data. Detailed construction data (bearings, seals, materials per project) is confirmed on the data sheet for your selection.

WCC technical specifications

How the WCC barrel pump works

A barrel pump has an outer pressure-containing casing and a removable inner cartridge that holds the stages. Liquid enters, passes through the impellers in series and gains head at each stage, and the outer barrel contains the discharge pressure. High-pressure barrel casings are normally closed with a head, so the rotating element can be withdrawn as one cartridge at overhaul.

In the standard WCC the impellers face the same direction. In the WCCO the impellers are arranged in opposition, which balances axial thrust through the rotor. In the WCCD a double-suction first stage lowers the NPSH required, which helps when suction conditions are marginal. The turbine versions are for plants that drive the pump from a steam or other turbine rather than an electric motor.

Where the WCC fits in the plant

Typical WCC duties are boiler feed, high-pressure injection, pipeline and product transfer, and process charge services. For lower heads in the same site, a single-stage OH2 or OH3 pump such as the HPX or HPX-V is usually more economical, while WCC is selected when head or pressure climbs beyond what those machines can offer.

Related items often ordered alongside it are API 682 cartridge seals, for example the BX metal bellows seal, together with the pump’s flush and cooling piping and the actuated isolation and control valves of the same unit.

WCC selection and ordering checklist

• Liquid, specific gravity, viscosity and vapour pressure at pumping temperature.
• Rated and minimum continuous flow, and differential head.
• Suction pressure and available NPSH, which decides between WCC and WCCD.
• Design pressure and temperature to select the flange class (600# to 2500#).
• Driver type: electric motor, or a turbine for WCC-T and WCC-TT.
• Axial thrust approach: standard or opposed impeller (WCCO).
• Seal arrangement and API 682 plan, plus any special material requirement.
• Site data: ambient temperature, area classification, and available lifting space for cartridge removal.

Installation, commissioning and maintenance of the WCC

A multistage barrel pump needs a stiff baseplate and careful alignment to the driver. Check pipe strain before and after coupling, vent the casing completely, and bring the pump up to temperature slowly when it handles hot liquid. Protect it with a minimum-flow line, because running far below the best efficiency flow raises vibration and heat.

Maintenance is built around the removable cartridge. Keeping a complete spare cartridge, or at least spare wear parts, shortens outages on critical boiler feed or injection services. Trend vibration, bearing temperature and seal leakage so that wear is found before it becomes a forced outage.

WCC in Oman and the GCC

Barrel pumps of this type serve power and desalination plants with high-pressure feed duties, oil and gas production with injection and export services, and refineries and petrochemical units. In the Gulf climate, cooling water temperature, dust on turbine and motor surfaces and humidity near the coast are practical points to include in the enquiry.

WCC variant overview

Spare parts and lifecycle support for the WCC

Barrel pumps run for many years between major overhauls, so planning spares early protects availability. Typical critical spares for a multistage barrel pump include a complete rotor or inner element, mechanical seals, bearings, wear rings, balance drum or disc components and casing gaskets. Keeping a pre-assembled spare inner element allows the pump to return to service quickly, because the barrel stays in the pipework while the cartridge is exchanged. When you request spares, include the pump serial number and the original data sheet so that parts can be matched to the as-built configuration.

Information to send with a WCC RFQ

• Process data sheet or the full duty: liquid, temperatures, pressures, flow and head.
• Variant wanted (WCC, WCCD, WCCO or turbine arrangement) or an open selection request.
• Driver data and utilities available.
• Seal, material and inspection requirements.
• Quantity and spare parts scope.

Documents and quotation

Send us the WCC series code together with your duty data and we will confirm which documents are available for your configuration, then prepare a quotation.

Seven Star LLC is an independent supplier in Muscat serving Oman and the GCC. Delivery time and availability are confirmed per enquiry.