Tiger-Vac • 3D Printing / Additive Manufacturing

EXP1-20 DT (PRS-HEC)

Electric PRS vacuum with integrated high-efficiency cyclone for recovery and reuse of unsintered metal powder from powder bed fusion printers. Third-party certified for Zone 21 and Zone 22 (ATEX II 2GD). TEFC motor. HEPA H14. Stainless steel SAE 304.

Integrated HEC cyclone — separates up to 98 % of the powder
ATEX II 2GD — Zone 21 and Zone 22, LCIE 03 ATEX 6297
TEFC motor — fully enclosed, externally cooled
Detachable SS 304 recovery tank — 25 L
HEPA H14 as secondary safety barrier
ESD-safe accessories included

Tiger-Vac EXP1-20 DT (PRS-HEC) – electric PRS powder recovery system

ATEX II 2GD — Zone 21 and Zone 22

LCIE 03 ATEX 6297

HEPA H14 — EN 1822

EN 17348 — combustible dust

CE — ATEX Directive 2014/34/EU

Powder that would otherwise go to waste

The EXP1-20 DT (PRS-HEC) is Tiger-Vac's electric powder recovery system for metal powder 3D printing. The integrated high-efficiency cyclone (HEC) separates up to 98 % of the recovered powder from the airstream and collects it in the detachable stainless steel SAE 304 recovery tank — before the air ever reaches the HEPA H14 filter. The powder remains clean, ready for sieving and direct reuse.

The TEFC motor (Totally Enclosed Fan Cooled) is sealed and cooled externally, meaning it draws no ambient air into the motor housing — a prerequisite for safe operation in rooms where explosive dust is present. The unit is third-party certified for Zone 21 and Zone 22 by notified body LCIE (LCIE 03 ATEX 6297).

The entire contact surface is constructed in stainless steel SAE 304, CE marked in accordance with EN 17348. All included accessories are ESD-safe and approved for use in ATEX-classified areas.

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)
Motor type	TEFC (Totally Enclosed Fan Cooled)
Power	1 kW / 1,000 W
Voltage	230 V, 50 Hz, single phase
Current	4.5 A
Airflow	224 m³/h
Vacuum pressure	1,550 mmH²O
Noise level	78/85 dB(A)
Suction inlet	Ø50 mm (2” camlock)
Recovery tank	25 L — detachable, SS 304
Weight (without accessories)	98 kg
Dimensions	H 135 × W 56 × L 112 cm
Cord length	15 m
Recovery type	Dry only

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. 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 1

Side view 2

Frequently asked questions

What is the difference between the EXP1-20 DT (PRS-HEC) and a standard ATEX vacuum?

A standard ATEX vacuum collects everything and passes the air directly through the filter. The EXP1-20 DT (PRS-HEC) is a powder recovery system: the integrated cyclone separates up to 98 % of the powder from the airstream and directs it into the detachable recovery tank — clean and uncontaminated — before the HEPA filter. The powder can then be sieved and returned to the print process.

What does a TEFC motor mean in an ATEX context?

TEFC stands for Totally Enclosed Fan Cooled. The motor housing is completely sealed — no ambient air is drawn through the motor windings. Cooling is provided by an external fan on the motor shaft. In ATEX-classified areas this is critical, because an open motor would directly expose the electrical components to explosive dust.

Which zones is the EXP1-20 certified for?

The EXP1-20 is certified for Zone 21 and Zone 22 under ATEX Directive 2014/34/EU. Zone 22 covers areas where explosive dust atmospheres occur only infrequently and briefly. Zone 21 covers areas where explosive dust atmospheres may occur periodically. The certificate was issued by notified body LCIE (LCIE 03 ATEX 6297).

Can the recovered powder be reused?

Yes — that is the purpose of the PRS system. Because the cyclone separates 98 % of the powder from the airstream before the filter, the powder arrives in the recovery tank clean and uncontaminated. It can then be sieved to the desired particle size and returned to the print process.

Is the EXP1-20 suitable for both metal and polymer powder?

Yes. The PRS system is designed for all forms of additive manufacturing. For metal powder the ATEX certification is particularly relevant, as conductive metal powders — aluminium, titanium, stainless steel — can form explosive atmospheres. The ESD-safe construction ensures correct dissipation of static electricity.

What is the filter configuration on the EXP1-20?

The EXP1-20 uses two-stage filtration: first the integrated HEC cyclone as a mechanical pre-separator (no filter media, cannot become blocked), then a HEPA H14 filter (99.995 % at 0.3 µm) as a secondary safety barrier. A PTFE-laminated cloth primary filter is included. An optional pre-filter is available to extend HEPA filter service life.

Is the EXP1-20 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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