Bell & Gossett e-90 Inline Pump - Specs & Replacement Guide

Bell and Gossett is a leading manufacturer of water system solutions for commercial HVAC and hydronic applications. Known for engineering excellence and reliability, Bell and Gossett inline pumps are widely specified by industry professionals across the United States.

One of their best-known lines is the high-efficiency e 90 inline circulator pumps, which are reliable for water circulation in chilled water systems, heating loops, water terminals, and some domestic water applications.

This technical guide covers the e-90’s main features and helps you understand its models, pump curves, and selection guidelines. If you're looking for information about the e-90 range, this guide delivers the valuable insights and practical advice you need.

Bell and Gossett circulator pump e-90 Overview

The e-90 pump inline circulator is a high-efficiency, close-coupled pump that is versatile, cost-effective, and well-suited for the small commercial HVAC market. With some installation arrangements available, it is an ideal solution where space is a concern.

The range is designed for heating and cooling applications, with an operating temperature range of -10°F to 250°F and a maximum working pressure of 175 psi. The e-90 has eight models, with connection sizes ranging from 1" x 1" to 3" x 3". The hydraulic coverage ranges from 20 GPM to 250 GPM, and the motors range from ¼ hp (0.186 kW) to 5 hp (3.73 kW).

They can be installed vertically or horizontally and feature a space-saving back-pull-out design that reduces maintenance. In addition, e-90 models are pre-assembled, pre-programmed packages with built-in pump-protection controls and monitoring to help optimize pump performance.

Wide Range of Options

The e-90 range is divided into three pump groups:

e-90 Standard
e-90E Smart Pump
e-90 with ECM

e-90 Standard Pumps

The e-90 standard pump features eight models and is available in 116 standard pre-configured designs. They can also be built to order in bronze-fitted or all-bronze construction, depending on the application needs. Additionally, the entire range is available as header pumps (less-volute), generally mounted directly onto boilers for recirculations.

e-90E Smart Pump

This variation uses the same hydraulic construction as the standard pump, paired with a permanent-magnet motor and an integrated microprocessor control platform. It can deliver up to 70% energy savings compared to fixed-speed operation (application-dependent) and reduce installation time. It's a good option for projects where efficiency and practical control are a must.

In summary, the main features as mentioned are:

Special Motor
Variable Speed Drive
Pre-programmed packages

Working together, adding the built-in pump protection controls, and monitoring the system can deliver meaningful energy savings while extending the pump's life cycle.

Bell and Gosset inline pump e-90E Smart Pumps - Curves

e-90 with ECM

This option is available in seven standard models. The pumps are fitted with ECM (Electronically Commutated Motors), which deliver high efficiency, especially for HVAC applications. They are lighter, quieter, and operate with low vibration; their variable-speed capabilities adjust flow and head, always seeking the optimal point of operation. It can be operated manually or remotely via 0-10 VDC input/output.

Bell and Gosset inline pump e-90E with EC Motor - Curve

Construction Material Options

The e 90 range has two material construction options (for parts in contact with the fluid), as per the table below:

Mechanical Seal Options

The range uses a modern unitized mechanical seal with a stainless steel drive mechanism that reduces torsional stress on the other seals, thereby extending equipment service life.

Further, B&G offers several mechanical seal options to ensure that the e-90 pumps suit any requirement needed, as mentioned in the option table below:

Ease of Installation

The e-90 is compact; its inline arrangement is ideal for tight mechanical rooms, as it can be installed in the piping and mounted vertically or horizontally.

Robust Design

The e-90 pump is designed on a close-coupled platform, eliminating the need for a bearing frame, coupler, stub shaft, or shaft sleeve. The motor is fitted with a stainless steel shaft and double-sealed ball bearings for greater water resistance.

High Hydraulic Efficiency

The standard e-90 pump delivers good hydraulic performance thanks to its design and features, making it suitable for a wide range of water system applications. When using electronically commutated motors (ECMs) with integrated variable-speed control to match optimal flow and head operation, power consumption can also be substantially reduced.

Finally, the e-90E Smart Pump, which uses an ultra-premium motor and built-in protection and monitoring controls to optimize pump performance, can achieve energy savings and performance gains of up to 70% when properly sized and managed. (vs Fixed speed).

Simplified Maintenance

Back-pull-out design allows the pump to be serviced without disturbing the piping.
Motors include sealed-for-life bearings.
The one-piece unitized mechanical seal mentioned before simplifies seal removal and replacement.

e-90 Motors

Standard e-90 motors are NEMA-standard efficient with ODP enclosures and vertical drip covers—Single-phase and three-phase options with thermal overload protection. Optional TEFC, premium-efficiency motors are available upon special arrangement.

e-90 models with electronically commutated motors (ECMs) are single-phase only; no three-phase models are available. Series e-90E smart pumps feature Xylem's ultra-premium IE5 permanent-magnet innovative motor, available in single- and three-phase options. Motors include an integrated VFD that supports multiple speeds.

You can check a variety of Bell and Gossett Motors on the following link: Bell & Gossett Pump Motors

Applications - Where the Bell and Gossett inline pump e-90 Is Commonly Used

The e-90 pump is versatile and well-suited for the small commercial/domestic HVAC market. Given its features and capabilities, it can be a good choice for several applications. Below are standard systems where e-90 pumps are frequently applied:

Hydronic Heating Systems

Boiler loops
Primary-secondary piping
Radiant heating manifolds
Terminal heating equipment

Chilled Water & Cooling Applications

Chiller distribution loops
Air handler coils
Fan coils
Plate heat exchangers

Domestic Water Systems

Heat Recovery Systems
Domestic hot water distribution

For any of the applications mentioned, e-90 will be a good choice and will perform efficiently. Below are the operating limits of the range to make sure that e-90 is suitable for your design requirements:

Water flow rate: 20 GPM (4.5 m³/hr) to 250 GPM (56.8 m³/hr)
Water temperature: -10° to 250°F (-23 to 121°C)
Maximum operational pressure: 175 psi
Motor power: ¼ (.186 kW) to 5 hp (3.73 kW)

How to replace B&G e-90 Pumps and parts

We need key information before replacing an e-90 pump or any other B&G part. The purpose of this part of the article is to identify the correct pump models and part numbers based on B&G's suggestions and advice.

Nameplate Reading / Pump Replacement

All the relevant information about the pump to be replaced, or the part number to be found, should be on the pump nameplate. Understanding the information on the e-90 nameplate is crucial to ensure the correct replacement pump/part is selected.

Below is a quick ''how to'' identify and read the Bell and Gosset Pump e-90 nameplate:

The nameplate above identifies the pump series, construction, impeller diameter, water flow rate, operational head, motor power, RPM, and the unit serial number for future reference.

Observation: Do not remove the pump nameplate. When ordering replacement parts, it is essential to provide complete nameplate data.

If a nameplate is preserved on the pump, it will be sufficient for a direct replacement of the entire unit; the only missing item is the connection sizes, which can be easily measured in the field.

Parts Replacement

Once the nameplate is read correctly and the pump model is known, use this information to identify the required replacement part by following the steps below.

We will use the nameplate shown earlier to find the correct Volute replacement for that unit.

The link to the B&G Replacement Parts Document, as outlined in the following steps, is provided at the end of this section.

Determine from the nameplate the pump size, pump construction, and impeller diameter:
Refer to the index for the page number of the parts breakdown for the specific pump size:

B&G Document Index
Find the appropriate column in the parts breakdown for the pump construction, then locate the correct part number for the desired item.

B&G - Pump Parts List

The procedure above helps identify the correct replacement e-90 pump or the required parts. Liberty's team handles inquiries like that daily. If you need any help, don't hesitate to contact us for further information.

B&G Pumps and Parts Available in Liberty Supply

Check the B&G Pump Ranges Available

Liberty Supply is a customer-centric organization. We focus on hydronic and steam systems for commercial and industrial facilities. As a B2B distributor within the "needs business," our foundational pillars are knowledge, communication, and speed. Relationships are built through hard work and consistent delivery of value. No exceptions. Our team maintains that with each transaction, we start back at zero.