Mattei S 500 11V Air Receiver – vertical, 500 L, 11 bar, Rp 1″/Rp ½″, 120 kg

A problem you have already faced

• The compressor starts more than 8-10 times per hour — the contactor burns out, the motor fails prematurely
• Pressure drops when a spray gun and impact wrench run at the same time — paint defects and automation faults
• Condensate in the gun and hoses — the air does not cool enough before reaching the tool
• No PED or CE documentation — the technical inspectorate refuses commissioning, the insurer refuses claims
• Sourcing from the EU takes 4-8 weeks; your workshop or production line stands idle

A receiver without certification or the wrong capacity is not a saving — it is a hidden cost: contactor repairs, rejected product and a regulatory stop-work order.

What is the Mattei S 500 11V: model-number breakdown and operating principle

S — Mattei’s vertical receiver series (from Italian Serbatoio, meaning tank).

500 — 500-litre capacity. Sized to absorb demand peaks at compressor outputs of 500-1,800 l/min.

11 — maximum working pressure 11 bar. PED class; proof-tested with the safety margin required by Directive 2014/68/EU.

V — painted finish (Verniciato). Alternative: Z (Zincato, hot-dip galvanised) — model S 500 11Z, 130 kg, for humid and corrosive environments.

Operating principle: the compressor charges the receiver where pressure accumulates. Consumers draw air from the stored reserve rather than directly from the compressor. This dampens pressure pulsations, reduces motor starts and allows moisture to condense and settle in the vessel before the air reaches downstream equipment.

Technical specifications — Mattei S 500 11V

Expert tip: The Rp 1/2″ outlet is standard for connecting to a distribution manifold or refrigerated dryer in small systems. At compressor outputs above 1,800 l/min the 1/2″ outlet becomes a bottleneck — consider the S 900 11V with Rp 2″ outlet.

Equivalent products by brand

Note: Airpol RV 500/11 has an Rp 1″ outlet instead of 1/2″ — an adapter is required. Yakut RV-500/10 is rated at 10 bar: at a working pressure of 10-10.5 bar there is no safety margin and the relief valve may open unpredictably.

5 parameters to verify when selecting an equivalent receiver:

1. Capacity (L) — within ±10% of your calculated requirement
2. Maximum working pressure (bar) — must not be lower than compressor discharge pressure + 10% margin
3. Connection type and size — Rp 1/2″ vs. Rp 1″ outlet; adapters add cost and pressure drop
4. Pressure vessel standard (PED 2014/68/EU) — required for regulatory commissioning approval
5. Complete supply (safety valve, gauge, drain cock) — without these, add EUR 30-60 plus installation

Why Acvatron SRL — 5 compelling reasons

1. Engineering-based capacity selection

An Acvatron engineer checks your compressor output, consumption profile and the allowable number of starts per hour. You receive a clear justification: why 500 L is sufficient or why you need 900 L — with a calculation, not a guess.

2. Full documentation: PED 2014/68/EU, ISO 9001, CE

Every Mattei receiver is shipped with a declaration of conformity under Directive 2014/68/EU, a pressure-vessel data sheet and CE marking. The complete package for technical inspection and safety audits without any additional paperwork.

3. Stock held in Chisinau

Mattei S 500 11V is held in stock. Same-day dispatch; next business-day delivery within Moldova. The galvanised version S 500 11Z is available on a 7-10 working-day lead time.

4. 24-month warranty, local service

24-month warranty. Safety-valve checks, drain maintenance and scheduled inspections are performed by Acvatron engineers in Chisinau — no need to return the unit.

5. Authorised Mattei distributor in Moldova

Acvatron SRL is the official Mattei Group distributor in Moldova. Prices are confirmed in the quotation on the day of enquiry with no intermediary mark-ups.

Application areas for the Mattei S 500 11V

Vehicle service centres and tyre shops

• Pressure stabilisation for a spray gun and blow gun running on the same line
• Buffer when impact wrench, inflation and blow-off operate simultaneously
• Supplying pneumatic lifts and bench vices in service bays

Small and medium manufacturing

• Air storage for pneumatic presses and stamping machines with cyclic demand
• Supplying assembly lines and pneumatic tools (grinders, staplers, wrenches)
• Primary moisture separation before a refrigerated dryer — reduces dryer load by 20-30%

Food processing

• Air reserve for pneumatic dosing and packaging machines
• Supplying blow-off conveyors and labelling equipment
• Pressure stabilisation for pneumatic valves on bottling lines

Agricultural and processing facilities

• Compressed air for milking installations and grain pneumatic conveying
• Supplying grain-store valve control systems
• Buffer accumulator for seasonal equipment with peak demand

Expert opinion

Vitali Bolucevschi, Chief Engineer, Acvatron SRL — 15 years in the industry:

The 500-litre receiver is the most requested size for vehicle service centres and small production facilities. The most common mistake I see: a 500 L receiver connected to a 2,200 l/min compressor, and the owner wonders why pressure still drops. The rule is simple: receiver volume should be at least equal to the compressor output for one minute. At 900 l/min, 500 L solves the problem. At 1,800 l/min, you need 900 L. The second point: the Rp 1/2″ outlet on the S 500 11V is suited to DN15 pipework. If your distribution line is DN25 or larger, choose the S 900 with Rp 2″ outlet — otherwise the outlet becomes the system bottleneck.

Standards and certifications: PED 2014/68/EU (Pressure Equipment Directive), ISO 9001 (Mattei Group), CE marking, factory hydraulic proof tests.

How to choose the right receiver capacity: a 5-step process

1. Establish compressor free air delivery (l/min). From the compressor data sheet. A 7.5 kW unit typically delivers 900-1,000 l/min.
2. Determine the allowable motor starts per hour. For reciprocating compressors: max. 8-10 starts/hour; for screw compressors: 6-8. Every excess start accelerates contactor wear.
3. Apply the sizing formula. V (L) = Q (l/min) x T_cycle (min) / dP (bar). At Q=500, T=1, dP=1 -> V=500 L. Exact match with the S 500.
4. Check the outlet connection. Rp 1/2″ outlet suits DN15 pipework (up to ~1,500 l/min). For DN25+ pipework, choose a model with Rp 1″ or 2″ outlet.
5. Select the surface finish. V (painted) — for enclosed compressor rooms; Z (galvanised, 130 kg) — for humid locations and outdoor installation.

Handling common objections

“I can find a cheaper receiver without certification”

A receiver without a PED 2014/68/EU declaration of conformity is a pressure vessel without a licence to operate. The inspectorate will issue a stop-work order. In the event of an incident, the insurer will decline the claim. The price difference between a certified Mattei and an uncertified alternative is recovered from a single insurance event.

“The same receiver is cheaper elsewhere”

Check whether the price includes the fitting kit (safety valve, gauge, drain cock) and whether a CE declaration and vessel data sheet are provided. The Mattei S 500 11V is supplied fully equipped. Without fittings, add EUR 30-60 plus installation.

“I am not sure whether 500 litres is enough”

Contact Acvatron — our engineer will size the receiver in 10 minutes using your compressor output and consumer count. If the calculation shows you need 900 L, we will say so and offer the S 900 11V.

Frequently asked questions

What is the difference between the S 500 11V and S 500 11Z?

Only the surface finish. S 500 11V (V = Verniciato) — painted, 120 kg, for standard indoor compressor rooms. S 500 11Z (Z = Zincato) — hot-dip galvanised, 130 kg, resistant to high humidity, chemically aggressive environments and outdoor installation. Technical parameters (capacity, pressure, connections) are identical.

Can this receiver be connected to a screw compressor?

Yes. The receiver is not tied to a specific compressor type — reciprocating, screw or rotary-vane. The only limitation: the compressor output should not significantly exceed 1,800 l/min at these connection sizes. For 15-22 kW compressors (1,800-3,000 l/min) we recommend the S 900 11V with Rp 2″ outlet.

Is the safety valve included in the price?

Yes. Standard supply includes: a certified safety valve (set at 11 bar), a pressure gauge and a manual condensate drain cock. The receiver is ready to connect without additional fitting costs. An automatic electronic drain is available as an option for continuous-duty installations.

How often does the receiver need servicing?

Monthly: safety-valve function test (manual lift of the spindle). Quarterly: visual inspection for corrosion. Daily (with manual drain): condensate drain at the end of each shift. Annually: hydraulic pressure test at 16.5 bar (1.5 x 11 bar) per PED regulations. First statutory inspection: 4 years from the date of manufacture.

Take the next step right now

1. Call or message us on WhatsApp/Viber — an Acvatron SRL engineer will confirm S 500 11V stock availability and calculate the required capacity in 10 minutes.
2. Receive a commercial quotation with price, delivery time and the full technical documentation package (PED, CE, data sheet) on the day of your enquiry.
3. Place your order — same-day dispatch from our Chisinau warehouse upon payment; next business-day delivery within Moldova.

Acvatron SRL — an engineering approach to every sale.