Expansion Vessel
SWH Accessories
Expansion Vessel
Expansion tank for pressurized solar systems.
- Absorbs expansionBuffers glycol volume changes
- Butyl diaphragmLong-life, food-safe membrane
- Pre-chargeFactory set to system pressure
- Vertical/horizontalFlexible mounting
| Capacity | 8L – 100L |
|---|---|
| Pressure | 10 bar |
| Material | Steel |
| Application | Pressurized system |
Product Introduction
EverPeak expansion vessels protect closed solar loops from pressure spikes caused by thermal expansion of the heat-transfer fluid. A butyl diaphragm separates the fluid from a pre-charged air cushion that compresses as volume grows.
Correct sizing prevents relief-valve discharge and extends pump and seal life. Vessels are supplied pre-charged and can be mounted vertically or horizontally near the pump station.
Bodies are epoxy-coated steel with stainless flanges, suitable for glycol and water loops up to 120°C.
Main Features
- Butyl rubber diaphragm, food-safe
- Epoxy-coated steel shell
- Pre-charge 1.5 bar (adjustable)
- 5-50L capacities
- Max temperature 120°C
- G3/4 or G1 connection
Specifications
| Model | Volume | Pre-charge | Max Temp | Connection | Shell |
|---|---|---|---|---|---|
| EP-EV5 | 5L | 1.5 bar | 120°C | G3/4 | Steel |
| EP-EV12 | 12L | 1.5 bar | 120°C | G1 | Steel |
| EP-EV24 | 24L | 1.5 bar | 120°C | G1 | Steel |
Item Details
Sizing
- Volume
- Match to loop fluid volume.
- Pre-charge
- Set just below static pressure.
- Headroom
- Avoids frequent relief discharge.
Mounting
- Orientation
- Vertical or horizontal allowed.
- Location
- Near pump station, cool zone.
- Support
- Bracket for larger volumes.
Care
- Check
- Verify pre-charge yearly.
- Replace
- Swap diaphragm if pressure drifts.
- Flush
- Inspect during loop service.
Core Application Scenarios
- 01Closed SWH loops
- 02Glycol systems
- 03Commercial plants
- 04Heating circuits
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