Name: HST - PT 21
Brand: HST

Question 1

What is the HST PT 21 teabag machine?

Accepted Answer

A fully automatic double-chamber machine that makes naked bags with string and hard tags, at up to 175 bags per minute. This gives buyers a clear basis for selecting the bag format, automation level and factory layout that suit the project.

Question 2

Which PT 21 models are available?

Accepted Answer

Three: the PT 21 with manual take-off, the PT 21.1 with single-row cartoning and the PT 21.2 with multi-row cartoning. All three run at up to 175 bags per minute and share the same bag and tag formats.

Question 3

How do the three models differ technically?

Accepted Answer

PT 21: 1 kW, 0.65 kWh, 255 × 90 × 195 cm, 900 kg. PT 21.1: 1 kW, 0.65 kWh, 240 × 100 × 195 cm, 1,035 kg. PT 21.2: 4.75 kW, 4.25 kWh, 280 × 100 × 195 cm, 1,250 kg. All models need 4–6 bar compressed air.

Question 4

How fast is the PT 21?

Accepted Answer

The HST PT 21 runs at up to 175 bags per minute under normal production conditions. That equals approximately 10,500 double-chamber teabags per hour; the tea throughput in kilograms depends on the specified filling weight. For a mid-size factory running two shifts, this is a meaningful step up from semi-automatic production.

Question 5

What bag and tag sizes does it make?

Accepted Answer

Bags A (44×64), B (40×60) and D (44×60) mm; tags E1 (23×28) and E2 (28×32) mm. This gives buyers a clear basis for selecting the bag format, automation level and factory layout that suit the project.

Question 6

Can it carton the bags?

Accepted Answer

Yes — optional single-row or multi-row cartoning is available on the HST PT 21, packing finished bags into cartons as part of the line. Single-row and multi-row versions can pack up to 100 bags per box. This integration removes a separate cartoning step, reducing footprint and labour for branded retail production.

Question 7

PT 21 vs PT 6 — which should I choose?

Accepted Answer

The PT 21 makes double-chamber bags with string and hard tags (up to 175/min); the PT 6 makes naked bags without strings or tags (up to 1,000/min).

Question 8

Does the HST PT 21 envelope the tea bags in individual envelopes?

Accepted Answer

No. The HST PT 21 does not envelope the tea bags: it produces naked double-chamber bags with string and tag, without an individual envelope. If enveloping is required, the HST PT 25 and HST PT 33 produce the same double-chamber bags with an individual envelope.

Question 9

What tag sizes are available?

Accepted Answer

E1 (23×28 mm) and E2 (28×32 mm). This gives buyers a clear basis for selecting the bag format, automation level and factory layout that suit the project.

Question 10

Is it flexible on formats?

Accepted Answer

Yes—three bag sizes (A, B, D) and two tag sizes (E1, E2), on all three models. This gives buyers a clear basis for selecting the bag format, automation level and factory layout that suit the project.

Question 11

Is it fully automatic?

Accepted Answer

Yes—fully automatic double-chamber production. This gives buyers a clear basis for selecting the bag format, automation level and factory layout that suit the project.

Question 12

Who makes the PT 21?

Accepted Answer

The HST PT 21 is manufactured by HST Maschinenundlagen GmbH, a German specialist in tea and herbal infusion packaging machinery with decades of experience supplying production lines to the global tea industry. HST machines are installed in tea factories across Europe, Asia and the Middle East. In the Gulf, India and surrounding markets, HST machines are represented and supported by dph Industries, which handles technical consultancy, commissioning and regional after-sales service.

Capacity	Up to 175 bags/min
Bag Sizes	A = 44×64 mm, B = 40×60 mm, D = 44×60 mm
Tag Sizes	E1 = 23×28 mm, E2 = 28×32 mm (E2 on request)
Power connectionvaries	1 kW
Energy consumptionvaries	0.65 kWh
Dimensionsvaries	255 × 90 × 195 cm
Weightvaries	900 kg
Compressed air	4–6 bar

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HST - PT 21

Why producers choose the HST - PT 21

Overview

Specifications

Key features

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Frequently asked questions

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