Expansion Tanks for Water
Use these tanks to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems. They prevent water loss by eliminating the need to expel hot water from systems during each heating cycle.
Galvanized steel tanks are hot-dipped for maximum corrosion resistance.
For technical drawings and 3-D models, click on a part number.
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Tank Side Connection Pipe Size | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Tank End Connection Pipe Size (E1)  | (S1) | (S2) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
| 8 | 9" | 32" | 5" | 11" | 3/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 0000000 |
| 15 | 12" | 30" | 4" | 11" | __ | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 000000 |
| 18 | 12" | 36" | 4" | 14" | __ | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 000000 |
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Tank End Connection Pipe Size | Tank Side Connection Pipe Size | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Lg. (C) | (E1) | (E2) | (E3) | (S1) | (S2) | (S3) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
| 8 | 12" | 19" | 4" | 4" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 0000000 |
| 15 | 12" | 33" | 4" | 11" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 000000 |
| 40 | 14" | 63" | 4" | 26" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 000000 |
Expansion Tanks for Drinking Water
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These tanks meet NSF/ANSI Standard 61 for use with drinking (potable) water. Use them to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems. All of these tanks have a diaphragm, which completely separates air and water. They prevent water loss by eliminating the need to expel hot water from systems during each heating cycle.
For technical drawings and 3-D models, click on a part number.
Tank End (E1) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Connection Pipe Size | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Diaphragm Material | Specifications Met | Each | |
Beige-Painted Steel | ||||||||||||
| 2.1 | 8" | 11" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 000000 |
| 4.5 | 10 1/2" | 13 1/2" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 00000 |
| 8.5 | 12 1/2" | 19 3/16" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 000000 |
ASME-Code Expansion Tanks for Water
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Manufactured in accordance with ASME BPVC.VIII.1, these tanks accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems. They prevent water loss by eliminating the need to expel hot water from systems during each heating cycle.
For technical drawings and 3-D models, click on a part number.
Tank End Connection Pipe Size | Tank Side Connection Pipe Size | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Lg. (C) | (E1) | (E2) | (S1) | (S2) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
Gray-Painted Steel | |||||||||||||||||
| 15 | 12" | 34 1/4" | 7" | 19" | 8" | 1/2 | 1/2 | 1 | 1 | NPT | Female | 13 | 450° | 150 | Bladderless | 00000000 | 0000000 |
| 30 | 14" | 49 9/16" | 8 3/8" | 31 1/4" | 10" | 1/2 | 1/2 | 1 1/2 | 1 1/2 | NPT | Female | 12 | 450° | 150 | Bladderless | 00000000 | 000000 |
| 40 | 14" | 64 5/8" | 8 3/8" | 46 1/4" | 10" | 1/2 | 1/2 | 1 1/2 | 1 1/2 | NPT | Female | 12 | 450° | 150 | Bladderless | 00000000 | 000000 |
| 80 | 20" | 66 1/8" | 10 3/4" | 42" | 16" | 1/2 | 1/2 | 2 | 2 | NPT | Female | 11 | 450° | 150 | Bladderless | 00000000 | 000000 |
Expansion Tanks for Lubricants
A rolling rubber diaphragm maintains tank pressure at or near 0 psi, which extends seal life to help keep lubricants clean. Use these tanks to accommodate the expansion of heated lubricants and provide a cushion of compressed air in closed lubricant-heating systems. They prevent lubricant loss by eliminating the need to expel hot lubricant from systems during each heating cycle.
For technical drawings and 3-D models, click on a part number.
Tank End | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, cu. in. | Connection Pipe Size | Pipe Connection Thread Type | Pipe Connection Gender | Stem Lg. | Dia. | Overall Lg. | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Diaphragm Material | Each | |
304 Stainless Steel | ||||||||||||
| 25 | 1/2 | NPT | Male | 1" | 4 1/16" | 3 3/4" | 20 | 350° | 15 | Fluoroelastomer Rubber | 0000000 | 0000000 |
| 25 | 3/4 | NPT | Male | 1 1/4" | 4 1/16" | 3 3/4" | 20 | 350° | 15 | Fluoroelastomer Rubber | 0000000 | 000000 |
| 25 | 3/8 | NPT | Male | 7/8" | 4 1/16" | 3 3/4" | 20 | 350° | 15 | Fluoroelastomer Rubber | 0000000 | 000000 |