Air receiver tank price: what drives the cost and how to size and buy

What decides the price of an air receiver

Search results for “air receiver tank price” are full of listings with a single number and no specification. Those numbers cannot be compared, because two “1,000 litre tanks” can differ by plate thickness, code, test and fittings. Compare quotes on the points below, not on litres alone.

Illustrative cost-driver build-up (illustrative; not anyone’s price)

For a painted 1,000 litre vertical receiver at 12 bar(g) with a safety valve, gauge and automatic drain, a typical split of cost looks like this. Shares move with steel prices, quantity and specification.

Two lessons follow. Steel and welding are about 60% of the cost, so design pressure and thickness drive price more than anything else. And the fittings and drain are about 15%, which is why a “cheap” quote often turns out to exclude them.

Wall thickness: why pressure costs money

A receiver shell is a thin cylinder. Pressure tries to split it along its length, and the hoop stress in the wall is about σ = P × D ÷ (2 × t), where P is pressure, D is diameter and t is thickness. Turned round, the thin-shell thickness is t = P × D ÷ (2 × S × E), where S is the allowable stress of the plate and E the weld joint efficiency. For a given steel, the thickness needed rises in proportion to both pressure and diameter. The figures below are illustrative to show the trend; design codes add small corrections to this formula, and real vessels must be designed, built and tested to the applicable code by the manufacturer.

Worked example: shell thickness for a 1,000 litre receiver (illustrative)

Assumptions: inside diameter D = 800 mm, design pressure P = 12 bar(g) = 1.2 MPa, allowable stress S = 138 MPa (illustrative, for a common carbon-steel pressure plate), weld joint efficiency E = 0.85, corrosion allowance 1.5 mm. Using t = P × D ÷ (2 × S × E):

1. 2 × S × E = 2 × 138 × 0.85 = 234.6 MPa.
2. P × D = 1.2 × 800 = 960 MPa·mm.
3. t = 960 ÷ 234.6 = 4.09 mm.
4. Add corrosion allowance: 4.09 + 1.5 = 5.59 mm; take the next plate size, 6 mm.
5. Check: hoop stress in the new 6 mm wall = 1.2 × 800 ÷ (2 × 6) = 80 MPa. After 1.5 mm of corrosion (4.5 mm left), 1.2 × 800 ÷ (2 × 4.5) = 106.7 MPa, still within S × E = 138 × 0.85 = 117.3 MPa.

What this means for price: the same 1,000 litre vessel (shell about 1.72 m long between two 2:1 dished heads) weighs about 270 kg of plate at 6 mm and about 360 kg at 8 mm (the plate a 16 bar design would need), a third more steel before welding time is counted. A receiver for a 16 bar or 25 bar duty is a different, heavier vessel, not the same tank with a different gauge. This is also why a receiver must never be used above its nameplate design pressure, whatever the price saving.

Sizing worked examples: buy the right volume once

Oversizing wastes money and floor space; undersizing causes short cycling, pressure dips and wet air. Size from duty. The full method is on our air receiver tank sizing page and in the receiver transient storage calculator; two different cases are shown here.

Worked example 1: control storage for a load/unload compressor (illustrative)

A fixed-speed screw compressor delivers 3.6 m³/min (127 cfm) and switches between 7.0 and 8.0 bar(g), a band ΔP of 1.0 bar. The worst cycling happens at 50% demand, when one load-unload cycle lasts T = 4 × V × ΔP ÷ (Q × Patm), with Patm = 1.013 bar(a). We want T of at least 1 minute.

1. Rearrange: V = T × Q × Patm ÷ (4 × ΔP).
2. V = 1 × 3.6 × 1.013 ÷ (4 × 1.0) = 3.647 ÷ 4 = 0.912 m³ = 912 litres.
3. Select the next standard size, 1,000 litres. Check: T = 4 × 1.0 × 1.0 ÷ (3.6 × 1.013) = 1.097 min, about 66 seconds.

Worked example 2: peak-demand storage (illustrative)

A test bench draws 2.5 m³/min (88 cfm) more than the compressor can deliver, for 45 seconds (0.75 min). Users can tolerate a fall from 7.5 to 6.3 bar(g), so ΔP = 1.2 bar.

1. V = Q × t × Patm ÷ ΔP = 2.5 × 0.75 × 1.013 ÷ 1.2 = 1.899 ÷ 1.2 = 1.583 m³ = 1,583 litres.
2. Add 25% margin: 1,583 × 1.25 = 1,979 litres; select 2,000 litres.
3. Recovery: the event draws 2.5 × 0.75 = 1.875 m³ of free air from storage. With 1.0 m³/min of spare compressor capacity afterwards, refill time = 1.875 ÷ 1.0 = 1.88 minutes, whatever the tank size. If the bench cycles faster than that, storage alone will not cover it; you need more compressor capacity.

Storage buys time; it does not add capacity. If demand above the compressor’s output lasts for many minutes, a bigger tank only delays the pressure collapse.

What parts come with an air receiver

Ask exactly which of these are included. Many low quotes are for a bare vessel.

Worked example: safety valve capacity (illustrative)

A receiver is fed by two compressors of 5.0 m³/min (177 cfm) each. The safety valve must relieve the combined output: 2 × 5.0 = 10.0 m³/min (10.0 × 35.315 = 353 cfm) at its set pressure. A valve sized for one compressor will let pressure keep rising if both controls fail. The set pressure must be at or below the nameplate design pressure, and never above it.

Vertical or horizontal, wet or dry

A vertical air receiver uses much less floor area and drains well from its bottom dished head; it suits most compressor rooms. A horizontal receiver suits low headroom or outdoor skids, but needs the drain at the true lowest point and takes roughly two and a half to three times the floor area. A wet receiver sits before the dryer and handles heavy condensate, so it needs a reliable drain and benefits most from galvanising or internal coating. A dry receiver after the dryer stays cleaner. Many plants need both. Our air receiver tanks hub covers placement and the footprint comparison in detail.

Indian conditions that should shape the specification

• Monsoon humidity: a mid-sized plant can collect many litres of condensate a shift. A neglected manual drain lets water fill the tank and corrode the bottom head. Budget for an automatic drain.
• Summer heat: in a 45 °C compressor room, discharge air reaches the receiver hotter and carries more water vapour, which condenses downstream. Place the receiver in a cool, ventilated spot so it also helps cool the air.
• Outdoor installation: sun, rain and coastal air in Andhra Pradesh attack paint quickly. Galvanising or a good coating system costs more at purchase and less over the vessel’s life.
• Raised pressures: plants often add a higher-pressure compressor to an old system. Check every existing receiver’s nameplate design pressure before raising the set point.

Inspection and statutory testing

Air receivers are pressure vessels. In India, the applicable rules (for factories, generally the state factory rules) require periodic examination by a competent person, with intervals and details that vary by state and by vessel; your insurer may add its own requirements. A typical examination covers documents and nameplate, external condition, internal condition through the inspection opening, ultrasonic wall-thickness readings, the safety valve, gauge and drain, and a hydrostatic (water) test where required, at the test pressure set by the applicable code and rules, commonly 1.3–1.5 times design pressure. For a 12 bar(g) receiver that means a water test at about 15.6–18.0 bar(g). Do not pressure-test a receiver with air: compressed air stores far more energy than water, so a pneumatic test is used only where the applicable code permits it, and then with special precautions. The full procedure is on our air receiver inspection and safety page.

Buying checklist

1. Size from duty: control storage and any peak events, as in the worked examples.
2. Design pressure above the highest setting of any compressor that can feed the tank, with margin for the safety valve set point.
3. Code of construction named; nameplate and hydrostatic test certificate supplied.
4. Plate grade, thickness and corrosion allowance stated.
5. Safety valve set pressure and rated flow matched to the total compressor output.
6. Drain type agreed; automatic drain on any wet receiver.
7. Finish suited to location: indoor painted, outdoor or wet duty galvanised or coated.
8. Inspection opening adequate for internal examination.
9. Connection sizes no smaller than the compressor discharge; full-flow valves.
10. Footprint, height and handling checked against the room and access route.

Buying a used receiver: proceed with caution

A second-hand receiver can look sound outside and be thin inside, because corrosion starts at the wet bottom head. Do not buy one unless all of the following are true: the nameplate is present and legible; the original test certificate or traceable data is available; ultrasonic thickness readings, especially at the bottom head and around nozzles, are above the code minimum; an internal examination shows no deep pitting or cracking; there are no welded repairs of unknown quality; and a competent person has hydrotested and accepted it for your design pressure. A receiver with no nameplate or traceable data should not be used as a pressure vessel, whatever the price.

How Reddy Compressors helps

• Supplies receivers alongside new and used compressors, and replacement receivers with nameplates and test documents from the manufacturer.
• Recommends wet, dry or point-of-use receivers and their positions, and checks whether existing receivers are correctly rated when compressors are changed or added.
• Checks receivers, safety valves and drains during service and AMC visits for all major compressor makes.
• Small 2–10 hp piston compressors on hire come with their air receiver.
• Independent multi-brand suppliers since 2002, serving Telangana, Andhra Pradesh and districts within about 300 km of Hyderabad, and supplying across India.

What to send us

• Compressor make, model, flow and maximum pressure, and how many compressors will feed the receiver.
• Control type (load/unload, modulation or VSD) and the pressure band.
• Any peak events: size, duration and the lowest pressure users can accept.
• Wet or dry duty, indoor or outdoor, and space available (floor area and headroom).
• For a replacement: photos of the old nameplate, safety valve and drain, and the last inspection date.

Frequently asked questions

What is the air receiver tank price?

There is no single price, because volume, design pressure, plate thickness, code, testing, finish and fittings all change it. Steel and welding are usually more than half the cost, so a higher-pressure receiver of the same volume costs noticeably more. Compare quotes on the same volume, design pressure, code, test certificate, safety valve and drain. A low price for a bare vessel can end up costing more once fittings and testing are added. Send us your compressor details and we will quote a matched receiver.

What size air tank does my compressor need?

Size from duty. For a fixed-speed load/unload compressor, aim for a cycle of at least a minute at half load: a 3.6 m³/min (127 cfm) machine with a 1 bar band needs about 912 litres, so a 1,000 litre tank. For short peaks, calculate the storage from the excess flow, its duration and the pressure drop users can accept. Our sizing page and storage calculator show the method step by step.

Is a vertical air receiver better than a horizontal one?

Usually yes for a compressor room: a vertical receiver takes much less floor area, drains well from its bottom head, and is easier to keep dry. Choose horizontal where headroom is low, on outdoor skids or under mezzanines. On a horizontal tank, make sure the drain is at the true lowest point and the tank is level, or water will collect where it cannot drain.

What should the receiver tank safety valve be set at?

Above the highest working pressure, so it does not lift in normal running, and at or below the nameplate design pressure, never above it. The valve must also be large enough to pass the full output of every compressor feeding the receiver. If a valve keeps lifting, the usual cause is a control or unloading fault or a set point too close to the working pressure; never plug or tighten it.

What parts come with an air receiver tank?

The vessel should always come with a nameplate and test certificate. Most also come with inlet and outlet connections, legs or saddles, and an inspection opening. A safety valve, pressure gauge and manual drain are often included; an automatic drain, isolation and bypass valves are often extra. Ask the supplier to list every part in the quote, with the safety valve’s set pressure and rated flow.

Is it safe to buy a used air receiver tank?

Only with full evidence: a legible nameplate, traceable test data, ultrasonic thickness readings above the code minimum, a clean internal examination and a hydrostatic test accepted by a competent person for your pressure. Internal corrosion at the bottom head is common and invisible from outside. A receiver without a nameplate or traceable data should not go back into pressure service.

Does a small hire compressor come with an air tank?

Yes. Our small 2–10 hp piston compressors on hire, used by garages, tyre shops, workshops and dental practices, come with their air receiver. For larger hired screw or diesel compressors, tell us if you need extra storage for peaks so it can be planned with the job. Drain the receiver of a small hire unit at least daily, and more often in the monsoon.

Related pages

• Air receiver tanks
• Air receiver tank sizing
• Air receiver inspection and safety
• Receiver transient storage calculator
• Air receiver lifecycle integrity
• Filter elements and drains
• Compressor AMC
• Air compressor buying checklist