Grundfos GFXA expansion tank (drawing)
Grundfos GFXA expansion tank (drawing)
Grundfos GFXA expansion tank (drawing)
Grundfos GFXA dimensions and weights (submittal)
Grundfos GFXA dimensions and weights (submittal)
Grundfos GFXA expansion tank (drawing)
Grundfos GFXA expansion tank (drawing)
Grundfos GFXA expansion tank (drawing)
Grundfos GFXA dimensions and weights (submittal)
Grundfos GFXA dimensions and weights (submittal)

Grundfos GFXA ASME Bladder Expansion Tank - 125 and 150 PSI

Max Pressure: 150 PSI
Capacity: 10 Gal
Model: GFXA-35

Product variant with selected options does not exist!
$1,732.28
SKU: 99455330
Weight : 40.0 lb
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Description
Grundfos · ASME Hydro-Pneumatic Tank
GFXA Expansion Tank
25 sizes from 10 to 3,963 gallons. ASME, replaceable bladder, full acceptance, for well and pressure-booster systems.
150 PSI to 800 Size, 125 PSI 1000 and Up
ASME Section VIII Div. 1
NSF/ANSI 61 Bladder, FDA Approved
Replaceable Heavy-Duty Butyl Bladder
Full Acceptance
10-3,963 Gallons
-20°F to 240°F
Stainless Steel System Connection
Factory Pre-Charged 40 PSIG
Overview

Grundfos GFXA tanks are ASME hydro-pneumatic tanks for commercial and industrial well systems, pressure-booster packages and other potable water service. They store water under pressure between pump cycles, so the pump starts less often and the system rides through short demands without a pump start. Water is held inside a heavy-duty butyl bladder and never touches the steel shell. The bladder is replaceable, and every tank can be installed vertically or horizontally.

Each tank carries a pressure gauge, a bladder integrity monitor and a standard 0.302-32 tire-valve charging connection. Tanks ship pre-charged at 40 PSIG and are set in the field to the system’s pump cut-in pressure. From the 85 size up, both the top and bottom connections reach the bladder; the bottom one is the system feed and the top one takes a gauge or switch.

What Ships and What It Needs to Run

Included: the GFXA tank with factory-installed bladder, pressure gauge, bladder integrity monitor and charging valve.

Ships: about 40-6,000 lb by model, by LTL freight to a commercial dock; liftgate or residential delivery is a paid checkout option. Larger tanks ship on their own skid or base ring.

Needed to install: isolation valve and drain at the system connection, a pressure gauge or tire gauge to set the pre-charge, and a level floor or pad rated for the full-of-water weight.

Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
Specifications
Tank type Hydro-pneumatic, replaceable bladder, full acceptance
Code ASME Section VIII Division 1 (U-stamped)
Max working pressure 150 PSI (GFXA-35 to GFXA-800L), 125 PSI (GFXA-1000 to GFXA-15000)
Temperature range -20°F to 240°F
Factory pre-charge 40 PSIG, field adjustable
Charging valve 0.302-32 NC (standard tire valve)
Installation Vertical or horizontal (horizontal: system connection below the centerline)
Listings Bladder NSF/ANSI 61, FDA approved
Models, Part Numbers and Weights
Model Part no. Gallons Acceptance (gal) Dia. x height (in) System conn. Max pressure Weight (lb)
GFXA-35 99455330 10 10 12 x 25 3/4 in 150 PSI 40
GFXA-50 99455332 13 13 14 x 25 3/4 in 150 PSI 50
GFXA-85 99455343 23 23 16 x 37 1 in 150 PSI 90
GFXA-130 97701299 35 35 20 x 37 1 in 150 PSI 125
GFXA-200 99455345 53 53 24 x 43 1-1/2 in 150 PSI 210
GFXA-300 99455346 79 79 24 x 55 1-1/2 in 150 PSI 225
GFXA-400 99455347 106 106 30 x 49 1-1/2 in 150 PSI 300
GFXA-500 99455348 132 132 30 x 57 2 in 150 PSI 330
GFXA-600 99455349 158 158 30 x 65 2 in 150 PSI 360
GFXA-700 99470818 185 185 — — 150 PSI 430
GFXA-800-WG 99469803 211 211 — — 125 PSI 475
GFXA-800L 99455350 211 211 32 x 76 2 in 150 PSI 475
GFXA-1000 99469683 264 264 36 x 87 3 in 125 PSI 735
GFXA-1200 99469684 317 317 36 x 98 3 in 125 PSI 745
GFXA-1400 99469687 370 370 36 x 111 3 in 125 PSI 900
GFXA-1600 99469688 422 422 48 x 84 3 in 125 PSI 1,210
GFXA-2000 99469690 528 528 48 x 96 3 in 125 PSI 1,305
GFXA-2500 99469691 660 660 48 x 114 4 in 125 PSI 1,430
GFXA-3000L 99469693 792 792 48 x 134 4 in 125 PSI 1,575
GFXA-3000S 99469695 792 792 60 x 93 4 in 125 PSI 2,169
GFXA-4000 99469698 1,056 1,056 60 x 115 4 in 125 PSI 2,638
GFXA-5000 99469699 1,320 1,320 60 x 138 4 in 125 PSI 3,246
GFXA-7500 99469700 1,980 1,980 72 x 140 4 in 125 PSI 4,080
GFXA-10000 99469702 2,640 2,640 72 x 172 4 in 125 PSI 4,920
GFXA-15000 99469704 3,963 3,963 72 x 243 4 in 125 PSI 6,000

Weights are Grundfos’s published figures (approximate shipping weight). Dimensions in inches. Tanks over 150 lb ship by LTL freight.

Before You Buy — The Limits That Decide the Fit
Pressure The relief valve setting must be at or below the tank rating; above 125 PSI system pressure choose GFXA-HP.
Liquid Potable or clean water. Not for fuel, oil or chemicals.
Sizing Size for the drawdown needed between pump starts at the cut-in and cut-out pressures; the whole tank volume is usable (full acceptance), but drawdown depends on the pressure band.
Weight Large tanks weigh up to several tons empty; check floor loading full of water.
Applications

Commercial and industrial water wells, domestic and fire-free pressure-booster packages (including Grundfos Hydro MPC), irrigation, and other potable water systems where pump cycling must be limited.

Materials of Construction
Shell and heads Carbon steel
Bladder Heavy-duty butyl, replaceable
System connection Stainless steel, NPT
Exterior Primer, black painted
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
GFXA Submittal, GFXA-35 to GFXA-800L (C-1004C)GFXA Submittal, GFXA-1000 to GFXA-15000
Videos

Product videos are being added to this listing. For a walkthrough in the meantime, email sales@watermainsupply.com.

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