Tiger-Vac • 3D Printing / Additive Manufacturing

SS-20 DT (PRS-HEC)

Pneumatic PRS vacuum with integrated high-efficiency cyclone for continuous recovery and reuse of metal powder from powder bed fusion printers. Third-party certified for Zone 21 and Zone 22 — Zone 21 internally inside the recovery tank (ATEX II 2GD, IECEx). HEPA H14. Stainless steel SAE 304.

No electric motor — continuous duty, no duty cycle limitation
Integrated HEC cyclone — separates up to 98 % of the powder
Zone 21 internally inside the recovery tank (LCIE 03 ATEX 6310 X)
Dual certified: ATEX and IECEx (IECEx LCIE 17.0076 X)
High vacuum pressure (4,570 mmH²O) — ideal for long hose runs
Detachable SS 304 recovery tank — 25 L

Tiger-Vac SS-20 DT (PRS-HEC) – pneumatic PRS powder recovery system

ATEX II 2GD — Zone 21 and Zone 22

LCIE 03 ATEX 6310 X

IECEx LCIE 17.0076 X

HEPA H14 — EN 1822

EN 17348 — combustible dust

Continuous duty without compromise

The SS-20 DT (PRS-HEC) is Tiger-Vac's pneumatic powder recovery system for additive manufacturing. Driven entirely by compressed air through the venturi principle, there is no electric motor — and therefore no thermal load, no duty cycle limitation, and no risk of motor failure during extended operation. This makes the SS-20 the natural choice when the production process demands uninterrupted running.

The integrated high-efficiency cyclone (HEC) separates up to 98 % of the metal powder into the detachable stainless steel SAE 304 recovery tank, while a HEPA H14 filter acts as a secondary safety barrier. The high vacuum pressure of 4,570 mmH²O makes the unit particularly well suited to long hose runs between printer and vacuum.

The SS-20 is third-party certified by LCIE for Zone 21 and Zone 22 externally, and Zone 21 internally inside the recovery tank, under both ATEX (LCIE 03 ATEX 6310 X) and IECEx (IECEx LCIE 17.0076 X) for conductive dusts.

Technical specifications

Parameter	Value
Filter class	HEPA H14 (EN 1822)
Filter efficiency	99.995 % at 0.3 µm
Cyclone separation	Up to 98 % (before filter)
Drive type	Pneumatic — single venturi, Ø6 mm
Minimum compressor	15 HP
Air line size	1/2” (12.7 mm)
Air consumption	21.2 L/s
Operating pressure	5.5 bar
Airflow	204 m³/h
Vacuum pressure	4,570 mmH²O
Noise level	72 dB(A)
Suction inlet	Ø50 mm (2” camlock)
Recovery tank	25 L — detachable, SS 304
Weight (without accessories)	95 kg
Dimensions	H 135 × W 56 × L 112 cm
Duty cycle	Continuous

Compliance standards: EN 17348 • EN ISO 80079-36:2016. Specifications subject to change without notice.

Included accessories

3D Tool Kit

Static conductive crushproof hose Ø38 mm × 3 m with 2” camlock + air supply hose 15 m. Conical nozzle, round brush and crevice tool (ESD-safe).

Wand set and floor tool

Optional. Double-bend wands in chrome (2 pcs) with conductive floor tool.

Extra recovery tank

Optional. Tank with closing lid and 4 conductive wheels (Part# 223001-ASM1).

Side view

Frequently asked questions

Why choose a pneumatic PRS vacuum over an electric one?

The decisive difference is the duty cycle. An electric motor heats up and must rest periodically — typically 50–70 %. The SS-20 is driven by compressed air and has no moving electrical parts, meaning unlimited runtime without cooling breaks. Ideal for processes that run continuously across full shifts.

What does Zone 21 internally inside the recovery tank mean?

Zone 21 covers locations where explosive dust atmospheres may occur periodically. Inside a recovery tank filling with fine, conductive metal powder — aluminium, titanium, copper — that is precisely the situation during filling and emptying. The Zone 21 internal attestation ensures the tank construction and materials are approved for this risk level.

What is the difference between ATEX and IECEx — do you need both?

ATEX is the European directive (2014/34/EU), mandatory in the EU and EEA. IECEx is an international certification scheme recognised in over 50 countries globally. The SS-20 is dual certified, making it directly applicable in both European facilities and international production sites.

What compressor does the SS-20 require?

The SS-20 requires a compressor of at least 15 HP (approx. 11 kW) delivering 21.2 L/s at 5.5 bar via a 1/2” (12.7 mm) air supply line. A 15 m air supply hose is included.

Why does the SS-20 achieve such high vacuum pressure compared to electric models?

The venturi principle generates vacuum by accelerating compressed air through a small nozzle, producing significantly higher vacuum pressure than electric motors of equivalent size. The SS-20 achieves 4,570 mmH²O vs 1,550–2,500 mmH²O for comparable electric PRS models. Particularly valuable for long hose runs.

Can the recovered powder be reused?

Yes. The HEC cyclone separates 98 % of the powder from the airstream before the filter, so the powder arrives in the recovery tank clean and uncontaminated. It can be sieved and returned to the print process. The optional extra tank (Part# 223001-ASM1) allows tank swapping during continued operation.

Is the SS-20 DT (PRS-HEC) the right model for you?

We advise on the selection of powder recovery systems for your specific print technology, powder type and operating conditions. Contact us for a concrete assessment.

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