Bell & Gossett Series e-80 In-Line Centrifugal Pump

Overview

The Bell & Gossett e-80 is a close-coupled, in-line mounted, single stage centrifugal pump that Bell & Gossett describes as delivering best-in-class hydraulic performance and optimised efficiency. Suction and discharge flanges sit on a common centreline, so the pump installs directly in the pipe run like a valve, saving floor space compared with a base-mounted pump. The Series e-80 is available in sizes from 1.5 inch through 8 inch, offers a broad efficiency range for fixed or variable speed operation, and can be ordered with an integrated variable frequency drive using sensored or sensorless control.

Seven Star LLC supplies the Bell & Gossett e-80 on request to HVAC contractors, consultants and building operators in Oman and the GCC, with engineering support in Muscat. In-line pumps are the usual choice for secondary chilled water circuits, fan coil loops and plant rooms where space is limited, which describes most commercial towers, hotels and hospitals in the region.

Operating Principle

In the Bell & Gossett e-80, the impeller is mounted directly on the extended shaft of a vertical solid shaft motor, so there is no separate pump bearing frame or coupling. Liquid enters the volute from the in-line suction flange, turns into the eye of the enclosed impeller and is discharged into the volute, where velocity is converted to pressure before the flow leaves through the opposite flange on the same axis. This close-coupled arrangement keeps the rotating assembly short and stiff and makes the whole unit compact.

The Bell & Gossett e-80 impellers are stainless steel to sustain hydraulic performance, resist chemicals and reduce corrosion, and they are balanced to ANSI/HI Grade G6.3 for quiet running. The built-in seal chamber has anti-vortex baffles and is fed by a flexible stainless steel braided hose from the discharge, which ensures the mechanical seal is continuously cooled and lubricated. The internally flushed seal uses a ceramic seat and carbon ring suitable for continuous operation at 225 degrees F.

Engineering Design of the Bell & Gossett e-80

The Bell & Gossett e-80 has a Class 30 cast iron volute, a carbon steel shaft covered by a stainless steel sleeve over the whole wetted area under the seal, a 304 stainless steel impeller keyed to the shaft and secured by a locking cap screw, and a cellulose fibre volute gasket. A precisely machined rigid cast iron motor bracket ensures concentric alignment between motor and pump, and allows the motor to be rotated at 90 degree intervals for convenient junction box positioning. Gauge tappings are provided at the suction and discharge nozzles, along with drain ports.

The back pull-out design allows the pump to be serviced without disturbing the piping, keeping downtime to a minimum, and four tapped holes in the bottom of the volute accept an ANSI/ASME flange for temporary support during installation. Motors are NEMA Premium efficiency: a JM drip-proof motor with the standard seal or a JP motor with the stuffing box option, from 0.75 to 50 hp at 1750 rpm and 5 to 60 hp at 3500 rpm, with TEFC enclosures optional. Each pump is factory pressure tested per Hydraulic Institute standards.

Key Features

The Bell & Gossett e-80 offers these practical benefits to designers and maintenance teams:

• Close-coupled in-line construction saves plant room floor space and installs directly in the pipeline.
• Sizes from 1.5 inch to 8 inch cover a broad flow range at 1750 and 3550 rpm.
• Stainless steel impellers balanced to ANSI/HI G6.3 resist corrosion and run quietly.
• An internally flushed mechanical seal with anti-vortex baffles and braided hose flush line extends seal life.
• Optional stuffing box seals extend the working pressure to 250 or 300 psi.
• Back pull-out design allows repairs without disturbing the piping.
• Horizontal or vertical installation, with optional flange mounting supports.
• Optional ITSC or IT integrated variable speed drives and Technologic PPS control of up to eight pumps in parallel.

Industrial Applications

Bell & Gossett targets the Series e-80 at hydronic heating and cooling systems, light industrial process and general service. Across Oman the Bell & Gossett e-80 is well suited to secondary chilled water and fan coil circuits in Muscat hotels and office buildings, hot water circulation in hospitals and hostels, cooling water for small process equipment, and booster duties in plant rooms where floor area is limited.

When fitted with the integrated Technologic Sensorless Control drive, the pump follows varying building loads without separate differential pressure sensors, which reduces wiring and commissioning work on retrofit projects. Seven Star LLC supplies the Bell & Gossett e-80 with seal kits, impellers and controls for projects in Muscat, Sohar, Salalah and across the GCC, and our engineering team helps match the pump size and impeller diameter to the published Bell & Gossett curves.

Technical Specifications

The Bell & Gossett e-80 data below is taken from the Bell & Gossett B-119C brochure.

Related pumps include the Bell & Gossett Series e-1531 close-coupled pump, the Grundfos MAGNA3 circulator and the Wilo-Stratos MAXO EC circulator.

How to Order

To order the Bell & Gossett e-80, send Seven Star LLC a formal RFQ with the pump size or your flow, head, fluid temperature and power supply, and our engineering team will confirm the selection, seal and motor options. Engineering support in Muscat serves customers throughout Oman and the GCC. Download the Bell & Gossett e-80 brochure from this page, and contact our pumps division for spare parts and delivery times.