Can the Bell & Gossett Series PL handle glycol systems?

Yes — the Series PL is compatible with typical ethylene and propylene glycol mixtures used in geothermal and freeze-protection applications. Glycol increases viscosity and affects performance, so confirm your duty point at the specific glycol concentration.

What is the max temperature for the Bell & Gossett Series PL?

The Series PL is rated to a maximum fluid temperature of 225°F (107°C), which covers virtually all hydronic heating applications.

Does Memphis Control Center stock Bell & Gossett Series PL pumps?

Yes — Memphis Control Center stocks common Series PL models in cast iron and lead-free bronze. In-stock orders placed by 2 PM CT ship same day. Call (901) 458-2000 or request a quote online.

Bell & Gossett Booster & Circulator Pump Guide: Select the Right Pump for Your System

Q: What information do I need to select a Bell & Gossett booster pump?

The four key variables are: flow rate in GPM, system head in feet, the media and its temperature, and the installation type (inline, base-mounted, etc.). If replacing an existing pump, the nameplate model number is all we need. Call (901) 458-2000 or submit a quote request.

Bell & Gossett Pumps — The Hydronic Industry Standard

Bell & Gossett has been the baseline specification for hydronic heating, cooling, and plumbing circulation in commercial and industrial buildings for over a century. When a mechanical engineer writes "B&G or equal" on a drawing, they're setting a performance benchmark that very few pumps can actually meet.

Every major B&G series serves a distinct application band — from a compact ¹⁄₁₂ HP inline circulator on a small hot water loop to a multi-pump skid package serving a large commercial chilled water plant. Getting the right series and the right model is the difference between a system that performs as designed and one that short-cycles, cavitates, or fails early.

Memphis Control Center stocks and sells Bell & Gossett's most common booster and circulator lines. Here's a complete breakdown — starting with the Series PL, our best-selling B&G line — plus how to match every series to your application.

B&G Distributor

Genuine Bell & Gossett product with full warranty and factory support — not grey-market.

Same-Day Shipping

In-stock orders placed by 2 PM CT ship the same day. Don't let a pump hold up your job.

Application Support

Not sure which pump? Call (901) 458-2000 — we'll work through GPM, head, and media with you.

The 4 Questions That Drive Every B&G Pump Selection

These are the four variables we work through on every pump call. Answer all four and we can put you in the right series in minutes — often right to the model number.

Question 1

Flow Rate (GPM)

Question 2

System Head (Ft)

Question 3

Media & Temp

Question 4

Mount / Install Type

Flow Rate — How Many GPM Does Your System Need?

Flow rate is your first filter and immediately narrows the field. Small residential or light commercial hydronic loops typically run 10–30 GPM. Mid-size commercial systems run 30–150 GPM. The Series PL covers 5–150 GPM across its full model range, making it the right answer for the vast majority of commercial booster applications. For systems above 150 GPM or requiring redundancy, you move to skid packages built on Series 1510 or split-case pumps.

Under 10 GPM (small zone)10–50 GPM (light commercial)50–150 GPM (commercial)150–500 GPM (large commercial)500+ GPM (skid / industrial)

System Head — How Much Resistance Must the Pump Overcome?

System head (expressed in feet) represents the total friction loss the pump must overcome — pipe length, fittings, coils, valves, and elevation changes. The Series PL models top out at roughly 20–30 feet of head depending on model, making them well-suited for most hydronic distribution loops. Higher-head applications (extended pipe runs, multi-story systems, high-resistance coil banks) require the Series 60 with a larger impeller, or the e-1535 operating in constant-pressure mode. Always size to your design head plus a 10–15% safety margin.

Under 20 ft (compact loops)20–30 ft (typical B&G PL range)30–100 ft (Series 60 territory)100+ ft (multi-story, long runs)

Media & Temperature — What Are You Pumping?

Most B&G booster pumps are designed for clean water in hydronic heating and cooling systems. The critical question is media type and temperature: hot water heating (up to 225°F for the Series PL), chilled water cooling, or a glycol mix for freeze protection. For glycol systems, the Series PL handles standard ethylene and propylene glycol concentrations — just confirm your % so we can derate performance accordingly. For potable domestic water applications, specify the lead-free bronze PL model to meet Safe Drinking Water Act requirements.

Hot water heating (up to 225°F)Chilled water (cooling)Glycol mix (freeze protection)Radiant / geothermal loopsDomestic water (lead-free required)

Mount & Install Type — Where Does the Pump Go?

Bell & Gossett makes inline pumps, base-mounted end suction pumps, vertical inline pumps, and factory-assembled skid packages. The Series PL, 60, and e-1535 are all inline designs — they install directly into the pipe run without a separate base or flexible couplings, which simplifies installation and reduces footprint. Vertical inline (HV Series) works where floor space is tight. Base-mounted and skid configurations are used when flow requirements exceed inline pump capacity or when redundancy is required by the owner or spec.

Inline (direct pipe mount — most common)Vertical inline (space-constrained)Base-mounted end suctionSkid / pre-engineered package

Pump down? Same-day shipping available on in-stock Series PL models — order by 2 PM CT.

Get a Quote Now Call (901) 458-2000

Bell & Gossett Series PL™ — Our Best-Selling Booster Pump

The Series PL is our most frequently sold Bell & Gossett pump. It's the right answer for the majority of commercial and light-industrial hydronic booster applications — hydronic heating, radiant floor, geothermal loops, chilled water distribution, and domestic pressure boosting. Bell & Gossett markets it as a superior alternative to wet rotor circulators, and in most field conditions, it is.

What makes the Series PL different from wet rotor circulators: The PL uses a close-coupled dry motor design with XL11™ permanently lubricated sealed bearings and a carbon/silicon carbide mechanical seal. Unlike wet rotor designs where the motor rotor runs in the system fluid, the PL's motor and bearings never contact system water. This means dramatically better performance in dirty or untreated water conditions, quieter long-term operation, and a replaceable mechanical seal if service is ever needed.

Bodies are available in cast iron or lead-free† bronze. All models operate up to 150 psi and 225°F (107°C). Standard motor is 115V/60Hz/1-phase ODP — 230V and 277V motors available on request.

Series PL Operating Data & Materials

Max Working Pressure150 psi (10 bar)

Max Fluid Temp225°F (107°C)

Body MaterialCast Iron or Lead-Free† Bronze

Impeller30% Glass-Filled Noryl® (PL-30/36/45/50/75); PPS on PL-55, PL-100 & PL-130

Face PlateStainless Steel

ShaftCarbon Steel w/ SS Sleeve (PL-30/36/45/50/75); Stainless Steel (PL-55/100/130)

Seal SystemCarbon/Silicon Carbide Mechanical

BearingsXL11™ Permanently Lubricated Sealed

Motor Voltage115V/60Hz/1Ph standard (ODP)

Lead-Free CertCSA / NSF 372 Low Lead Content†

Series PL Complete Model Table — All Part Numbers

Eight models from ¹⁄₁₂ HP to ²⁄₅ HP cover flows from approximately 5 GPM to 150+ GPM. Match your design duty point (GPM and head) to the performance curve range of each model. When your duty point falls between models, size up.

ModelHP / RPMCast Iron P/NBronze LF P/NFlange (NPT)BoltsMax FlowMax HeadShip Wt

PL-301/12 hp · 2650 rpm1BL0121BL013LF3/4, 1 & 1-1/4, 1-1/2"2-bolt~30 GPM~20 ft11.6 lbs

PL-361/6 hp · 3300 rpm1BL0011BL003LF3/4, 1 & 1-1/4, 1-1/2"2-bolt~40 GPM~25 ft13.1 lbs

PL-451/6 hp · 3300 rpm1BL0021BL004LF1, 1-1/4 & 1-1/2"2-bolt~55 GPM~25 ft14.5 lbs

PL-501/6 hp · 3300 rpm1BL0161BL017LF1, 1-1/4 & 1-1/2"2-bolt~75 GPM~20 ft14.5 lbs

PL-552/5 hp · 3250 rpm1BL0321BL068LF3/4, 1 & 1-1/4, 1-1/2"2-bolt~75 GPM~30 ft13.1 lbs

PL-1002/5 hp · 3250 rpm1BL1341BL136LF1, 1-1/4 & 1-1/2"2-bolt~100 GPM~25 ft14.5 lbs

PL-751/6 hp · 3400 rpm1BL0341BL035LF2"4-bolt~120 GPM~18 ft18.5 lbs

PL-1302/5 hp · 3200 rpm1BL0631BL065LF2"4-bolt~150 GPM~20 ft22.0 lbs

Important flange note: PL-75 and PL-130 use a 2" four-bolt flange connection. All other PL models (PL-30 through PL-100) use two-bolt flange connections up to 1-1/2" NPT. These are NOT cross-compatible — confirm your existing flange configuration before ordering a replacement. Note: The PL-130 is also available in a 3" flange variant (cast iron: 1BL070; bronze LF: 1BL072LF, 27 lbs) — specify if your existing pipe connection is 3". †Lead-free bronze models contain less than 0.25% lead content by weight on wetted surfaces, meeting Safe Drinking Water Act requirements (NSF/ANSI 372). 230/60/1 and 277/60/1 motors available on request.

Need a Series PL — In Stock, Ships Today

Give us the model number or your GPM and head requirements. Most common Series PL models ship same day from Memphis.

Request a Quote (901) 458-2000

Complete Bell & Gossett Series Breakdown

Beyond the Series PL, here's where each B&G pump line fits — and when to specify one over another.

Medium-Duty Inline · Most Specified Commercial HVAC Circulator

Bell & Gossett Series 60

The Commercial Boiler Room Standard

Heating / CoolingHydronicMost SpecifiedInline

The Bell & Gossett Series 60 is the most widely installed commercial hydronic circulator in North America. It's an inline, close-coupled end suction pump built for commercial and light-industrial hydronic heating and cooling. Available in a broad range of frame sizes covering flows from roughly 10 GPM to 250+ GPM at heads up to 200 feet depending on impeller — it handles what the Series PL cannot.

The Series 60 uses a replaceable mechanical seal and wear ring, making field service straightforward without pulling the pump from the piping. Bronze-fitted and all-iron construction options are available. Single-phase and three-phase motors span the full frame range. When you see "B&G or equal" on a boiler room drawing, it's almost always referencing a Series 60.

Choose the Series 60 when: Your flow or head requirements exceed the Series PL's capacity, you're specifying a commercial boiler or chiller plant, or you're replacing an existing Series 60 with a like-for-like unit. If the drawing already shows a Series 60, keep it — the flanges, dimensions, and service parts are standardized.

Flow Range~10 – 250+ GPM

Head RangeUp to 200+ ft (impeller dependent)

Install TypeInline, Close-Coupled

ConstructionBronze-Fitted or All-Iron

Motor Options1Ph or 3Ph, TEFC / ODP

SealReplaceable Mechanical Seal

Specifying or replacing a Series 60?Request a Quote →

High-Efficiency ECM Variable-Speed Inline Circulator

Bell & Gossett Series e-1535

The Smart Variable-Speed Circulator

ECM MotorVariable SpeedEnergy Star EligibleInline

The Series e-1535 is Bell & Gossett's electronically commutated motor (ECM) variable-speed circulator, designed for hydronic systems where load varies and energy efficiency matters. ECM motors are substantially more efficient at part load — where most hydronic circulators spend the vast majority of their operating hours. The power savings are significant: an ECM pump running at 60% speed uses roughly 22% of the power of the same pump at full speed.

The e-1535 supports proportional pressure, constant pressure, constant speed, and ΔT-based control modes with an integrated display for field programming. Available in 1-1/4" to 2-1/2" flange sizes covering flows to approximately 130 GPM. No external VFD needed — speed control is fully integrated.

Choose the e-1535 when: Energy efficiency or utility rebates are priorities, your system has variable load conditions, you're replacing an oversized constant-speed pump that's short-cycling, or you need integrated pump speed control without adding a separate VFD.

Motor TypeECM (Electronically Commutated)

Flow RangeUp to ~130 GPM

Flange Sizes1-1/4" – 2-1/2"

Control ModesProp Pressure, Const Pressure, ΔT, Const Speed

Install TypeInline, Close-Coupled

Best ForVariable Load / Energy Savings

Interested in the e-1535 for energy savings?Request a Quote →

Vertical Inline — Space-Constrained Mechanical Rooms

Bell & Gossett Series HV

The Vertical Inline Pump

Vertical InlineSpace-SavingNo Floor Base Needed

The Series HV is a vertically-oriented inline pump — the motor sits directly above the pump body with the impeller shaft running vertically. This eliminates the floor-mounted base, making the HV ideal for mechanical rooms where floor space is tight or where piping runs overhead and a horizontal base-mounted pump won't fit the layout.

Available in a range of sizes for commercial hydronic applications, with single-speed and two-speed motor options. The HV uses the same proven B&G hydraulic components as the Series 60 family, with stainless steel shaft and bronze-fitted internals standard.

Choose the HV when: Floor space in the mechanical room is limited, your piping configuration favors a vertical inline arrangement, or the existing installation specifies a vertical inline pump configuration.

OrientationVertical Inline

Floor SpaceMinimal — no separate base

ConstructionBronze-Fitted, SS Shaft

Motor OptionsSingle-Speed or Two-Speed

ApplicationCommercial Hydronic HVAC

ConnectionFlanged (inline)

Tight mechanical room? Series HV may be the answer.Request a Quote →

Small Zone Circulators — Residential & Light Commercial

Bell & Gossett NBF / NBF-S Series

The Zone Circulator

Residential / Small ZoneDHW RecirculationWet Rotor1/25 – 1/6 HP

The NBF and NBF-S are small wet rotor circulators for residential baseboard heating, radiant floor, domestic hot water recirculation, and small commercial zone applications. The wet rotor design — where the motor rotor runs directly in the system fluid — eliminates the mechanical seal, making them compact, quiet, and maintenance-free in clean water applications.

The NBF-S adds a 3-speed motor for field-adjustable flow control, useful for balancing flow between multiple heating zones. Both models use flanged or sweat connections depending on configuration. These are not intended for dirty water or glycol-heavy systems — for those applications, the Series PL's dry motor design holds up far better.

Choose the NBF/NBF-S when: You need a small, quiet zone circulator for a residential heating circuit, baseboard loop, or DHW recirculation application with clean system water.

Motor TypeWet Rotor (fluid-lubricated)

HP Range1/25 to 1/6 HP

Flow RangeUp to ~30 GPM

NBF-S Feature3-Speed Adjustable

Best ForResidential / Small Zone

MediaClean water only

Small zone or DHW recirc? NBF / NBF-S is your circulator.Request a Quote →

Pre-Engineered Systems — Large Commercial & Industrial

Bell & Gossett Skid-Mounted Pump Packages

Factory-Assembled Pump Stations

Duplex / TriplexLarge CommercialFactory-Built150–2,000+ GPM

B&G skid-mounted pump packages are factory-assembled, pre-piped, and pre-wired pump stations built around Bell & Gossett base-mounted end suction or split case pumps (Series 1510, 1531, and VSC are most common). These packages typically include two or more pumps in lead/lag or parallel configuration, common headers, isolation valves, check valves, pressure gauges, and a control panel — all mounted on a structural steel base and ready to set and connect on the job site.

Skid packages are specified when the project requires large flow, built-in pump redundancy, or when the owner or contractor wants a factory-tested, turnkey package that minimizes field assembly and commissioning time. Every package can be witnessed and tested before it leaves the shop.

Choose a skid package when: Flow requirements exceed what a single inline pump can handle, redundancy is required by spec, the project involves a large chilled water plant or domestic pressure-boosting system, or when the schedule demands a turnkey package rather than field assembly.

Typical ConfigDuplex or Triplex

Pump Series1510, 1531, VSC, e-Series

Flow Range150 GPM – 2,000+ GPM

IncludedPiping, Valves, Panel, Base

Control OptionsLead/Lag, VFD, BAS Interface

Lead TimeFactory order — call for timeline

Large commercial plant or redundancy required? Let's talk skid packages.Request a Quote →

Bell & Gossett Series Comparison at a Glance

Use this table to quickly identify which B&G pump series fits your application. When your application spans multiple columns, the more specific or higher-capacity series wins.

Bell & Gossett Pump Series Comparison
Feature	Series PL	Series 60	Series e-1535	Series HV	NBF / NBF-S	Skid Package
Typical Application	Hydronic booster, radiant, geothermal	Commercial HVAC hydronic	Variable-load efficiency	Space-constrained installs	Residential zones, DHW recirc	Large commercial / industrial
Typical Flow Range	5–150 GPM	10–250+ GPM	Up to ~130 GPM	Medium-Large	Up to ~30 GPM	150–2,000+ GPM
Motor Type	ODP dry motor	AC induction (TEFC/ODP)	ECM Variable Speed	AC induction	Wet rotor	AC or VFD
Variable Speed	—	—	✓ Integrated ECM	2-speed option	3-speed (NBF-S)	✓ VFD optional
Orientation	Inline, any direction	Inline horizontal	Inline horizontal	Vertical inline	Inline	Base-mounted
Dirty Water Handling	✓ Superior (dry motor)	Good	Good	Good	Clean water only	Good
Lead-Free Option	✓ Bronze LF models	Bronze-fitted	—	—	—	—
Max Fluid Temp	225°F (107°C)	250°F (121°C)	230°F (110°C)	250°F	230°F	250°F+
Field Serviceable	Seal replaceable	✓ Seal + wear ring	Seal replaceable	✓ Yes	Replace unit	✓ Full access
Best For Replacement	✓ Wet rotor swaps	✓ Like-for-like	✓ Oversized AC upgrades	✓ Like-for-like	✓ Small zone swaps	Factory order

Bell & Gossett Application Matching Guide

Match your real-world scenario to the right B&G series. Each card includes a representative photo of the application type. If your scenario doesn't fit neatly into one card, call us — we'll work through the duty point with you.

Hydronic Heating Booster — Small to Mid-Size Commercial

Hot water distribution for commercial heating systems, 10–130 GPM, inline installation. The most common B&G booster application in the field.

→ Series PL (PL-36 through PL-130)

Commercial HVAC — Larger Heating or Chilled Water Loop

Higher head, larger flow, multiple air handlers or FCUs. The Series 60 is the standard for any commercial boiler or chiller plant drawing that reads "B&G or equal."

→ Series 60

Geothermal Ground Loops & Radiant Floor Heating

Closed-loop geothermal systems, radiant floor distribution, or snowmelt. Often running glycol — the Series PL's dry motor handles glycol far better than wet rotor alternatives.

→ Series PL (confirm glycol % for derating)

Energy Efficiency Upgrade / Variable Load System

Replacing an oversized constant-speed circulator, targeting utility rebates, or need integrated pump speed control based on system ΔP or ΔT without an external VFD.

→ Series e-1535

Space-Constrained Mechanical Room

Where floor space is limited or piping runs overhead. A vertical inline installation eliminates the need for a floor base and significantly reduces footprint.

→ Series HV

Large Commercial Plant — Redundancy Required

Chilled water plants, central heating plants, domestic pressure boosting for high-rise or campus systems. Requires lead/lag pumping, large GPM, pre-engineered controls.

→ B&G Skid Package

Domestic Water / Potable Water Boosting

Building pressure boosting or potable recirculation where lead-free certification is required by code. Series PL lead-free bronze models meet Safe Drinking Water Act requirements.

→ Series PL Bronze LF Models

Replacing an Existing B&G Pump

Have the nameplate model number? That's all we need. If the tag is worn, give us pipe size, HP, voltage, and flange size — we'll find the right replacement fast.

→ Call (901) 458-2000

Not Sure Which Series You Need?

Give us your flow rate (GPM), head (ft), temperature, and application — we'll identify the right B&G pump series and part number and get it moving.

Request a Quote (901) 458-2000

Frequently Asked Questions

What information do I need to select a Bell & Gossett booster pump?

Four things: flow rate in GPM, system head in feet, the media and operating temperature, and the installation type (inline, vertical, base-mounted). If you're replacing an existing pump, the nameplate model number is all we need — we can confirm a direct replacement or the current equivalent if the model has been updated. If you're sizing new, even a rough description of your system (pipe size, loop length, building type, heating or cooling) is enough to get started. Call (901) 458-2000 or submit a quote request and we'll work through it with you.

What is the difference between the Series PL and a wet rotor circulator?

The Series PL uses a close-coupled dry motor — the motor and bearings never contact the system fluid. A wet rotor circulator (like the B&G NBF, Taco cartridge, or Grundfos Alpha) runs the motor rotor directly in the system water. Bell & Gossett markets the Series PL as a superior alternative to wet rotor designs, and in most field conditions it is: the PL handles dirty or untreated water far better, and the mechanical seal is replaceable if it ever fails. Wet rotor designs are typically quieter and slightly more compact, but they're best suited for clean, treated water applications. In hydronic systems with older piping, iron oxide, or glycol, the PL is the better long-term choice.

Can the Series PL handle glycol systems?

Yes — the Series PL is compatible with standard ethylene glycol and propylene glycol concentrations used in geothermal and freeze-protection applications. Keep in mind that glycol increases fluid viscosity relative to water, which shifts the pump's performance curve — you may need to derate flow and head capacity depending on glycol concentration and temperature. Let us know your glycol percentage and fluid temperature and we can confirm the selected model's duty point is still within range.

What's the difference between PL-75 / PL-130 and the smaller PL models?

The PL-75 and PL-130 use a 2" four-bolt flange connection. All other Series PL models (PL-30 through PL-55) use two-bolt flange connections up to 1-1/2" NPT. These flange types are not interchangeable — if you're replacing a PL-75 or PL-130, you cannot substitute a smaller PL model and expect the flanges to line up. Always confirm the flange configuration before ordering. Also note that the PL-75 runs at 3400 RPM — slightly higher than most other PL models — which extends its flow range despite the 1/6 HP motor rating.

When should I choose the e-1535 over a standard Series PL or Series 60?

The e-1535 makes the most economic sense when your system runs at varying loads — which is most hydronic systems most of the time. The affinity law means pump power drops by the cube of speed reduction: a pump running at 60% speed uses roughly 22% of the energy of the same pump at full speed. If energy savings or utility rebates are a priority, or if you're replacing an oversized pump that's short-cycling, the e-1535's premium pays back relatively quickly. If you need a reliable constant-speed circulator and first cost is the priority, the Series PL or Series 60 is the simpler, lower-cost answer.

Does Memphis Control Center stock Bell & Gossett pumps?

Yes — we're a Bell & Gossett distributor. We stock the most common Series PL models in both cast iron and lead-free bronze and ship same-day on in-stock orders placed by 2 PM CT. For Series 60, e-1535, HV, and NBF lines, availability varies by model — call us at (901) 458-2000 or submit a quote request with your part number or specs and we'll confirm stock and get it moving fast. Skid packages are factory-order items with lead times that vary by configuration and pump selection.

What is the maximum temperature and pressure for the Bell & Gossett Series PL?

The Series PL is rated to a maximum working pressure of 150 psi (10 bar) and a maximum fluid temperature of 225°F (107°C). This covers virtually all hydronic heating applications, including high-temperature hot water systems. For steam or fluid temperatures above 225°F, you'll need a different pump — call us to discuss alternatives.

Bell & Gossett Booster & Circulator Pump Guide:Select the Right Pump for Your System