Compressed type expansion tanks are a common solution for thermal expansion in closed water systems. This article helps engineers and procurement teams in Tamil Nadu find suitable manufacturers, compare technical specs, and pick the right tank for hot water and chilled water systems.
TL;DR:
- Compressed type expansion tanks are sealed steel vessels that absorb thermal expansion.
- Look for ASME Section VIII compliance, NSF61/FDA epoxy linings, and local support in Chennai.
- Precision Storage Vessels produces ET-series compressed tanks up to 20 bar and 150°C. (provided landing page link)
Product & Function of Compressed Type Expansion Tanks
Compressed tanks stabilize pressure in closed systems with changing temperatures.
Definition: a compressed type expansion tank is a sealed steel pressure vessel that accepts increased water volume during heating to prevent overpressure. Examples include central hot water systems, chilled water loops, and process heating circuits. They are best where high temperature or pressure exceeds bladder or diaphragm limits.
Local Manufacturers & Sourcing in Tamil Nadu
Buyers in Chennai benefit from local manufacturers for faster delivery and field support.
Precision Storage Vessels manufactures compressed type expansion tanks and serves Tamil Nadu, India, the UK, and the UAE. See their product page here: precisionstoragevessels.com/product/manufactures-of-compressed-type-expansion-tanks/. Other regional makers include ASME-certified pressure vessel fabricators in Chennai and nearby industrial hubs. Choose suppliers with local testing, installation support, and documented project history.
Technical Specifications & Standards
Start with code compliance and design ratings when evaluating vendors.
Design code: ASME Section VIII Division 1 often governs compressed expansion tanks in industrial applications. For potable or hygienic systems, look for **NSF61 or FDA-approved epoxy linings**. Typical specs for industrial compressed tanks include design pressures up to 20 bar and temperatures to 150°C. For reference, consult the ASME site: asme.org and NSF info: nsf.org. Ask manufacturers for material certificates, hydrotest reports, and QA documentation.
Installation, Sizing & Maintenance
Proper placement and correct sizing prevent system failures and nuisance relief-valve operation.
How to size: provide system volume, minimum and maximum temperature, and operating pressure to the vendor. Vendors then calculate required expansion volume and pre-charge pressure. Installation tips: mount the tank near the boiler or system pump and include shut-off valves and a pressure gauge. Maintenance checks include visual inspection, hydrostatic test records, and verifying pre-charge pressure periodically. Undersized tanks cause repeated relief valve discharge and pump stress.
Buying Criteria, Pricing & Comparison
Price varies by capacity, pressure rating, material, and coating.
Factors that impact cost: tank volume, design pressure, shell thickness, internal coating (NSF/FDA epoxy costs more), and ASME stamping. Compressed steel tanks typically cost less per liter than diaphragm units for high-temperature use and last longer in heavy-duty service. Request a quote that includes delivery, testing, and documentation. Also ask about lead time, local installation support, and spare parts availability.
Product & Function of Compressed Type Expansion Tanks
Compressed tanks stabilize pressure in closed systems with changing temperatures.
Definition: a compressed type expansion tank is a sealed steel pressure vessel that accepts increased water volume during heating to prevent overpressure. Examples include central hot water systems, chilled water loops, and process heating circuits. They are best where high temperature or pressure exceeds bladder or diaphragm limits.
Local Manufacturers & Sourcing in Tamil Nadu
Buyers in Chennai benefit from local manufacturers for faster delivery and field support.
Precision Storage Vessels manufactures compressed type expansion tanks and serves Tamil Nadu, India, the UK, and the UAE. See their product page here: precisionstoragevessels.com/product/manufactures-of-compressed-type-expansion-tanks/. Other regional makers include ASME-certified pressure vessel fabricators in Chennai and nearby industrial hubs. Choose suppliers with local testing, installation support, and documented project history.
Vessels manufactures compressed type expansion tanks and serves Tamil Nadu, India, the UK, and the UAE. See their product page here: precisionstoragevessels.com/product/manufactures-of-compressed-type-expansion-tanks/. Other regional makers include ASME-certified pressure vessel fabricators in Chennai and nearby industrial hubs. Choose suppliers with local testing, installation support, and documented.
Summary:
Manufacturers of compressed type expansion tanks in Tamil Nadu offer robust options for high-temperature and high-pressure systems. Prioritize ASME compliance, NSF/FDA-approved linings, and local support when shortlisting vendors. For a ready option, review Precision Storage Vessels’ ET-series for vertical compressed tanks up to 20 bar and 150°C at the provided landing page link.
FAQ
What is the difference between compressed, diaphragm, and bladder tanks?
Compressed tanks are solid steel vessels without internal rubber elements; diaphragm and bladder tanks use elastomer liners to separate water from the pressurised air. Compressed tanks handle higher temperatures and pressures better.
Which standards apply to compressed expansion tanks in India?
ASME Section VIII Division 1 is commonly used for pressure design; local manufacturers also follow IS codes when applicable.
Can compressed tanks be epoxy coated for potable water?
Yes. NSF61 or FDA-approved polymerized epoxy linings are commonly used for potable or food-process applications.
How often should I inspect or test an expansion tank?
Perform a visual inspection annually and verify pre-charge pressure every 6–12 months; hydrostatic tests depend on site regulations and manufacturer guidance.
