FK008-III Plastic Woven Valve Sack Making Machine: Technical Parameters and Factory Setup Guide

For packaging plants planning a PP woven valve sack line, the bag making machine is the final link that decides qualification rate, output and unit cost. The FK008-III Plastic Woven Valve Sack Making Machine, developed by Xiamen Gachn Group, is a third-generation full-servo model that has already been selected by more than 50 projects worldwide, including plants in Uzbekistan, Saudi Arabia and several large Chinese manufacturing bases. This guide compiles the machine's verified technical parameters, the factory space and utilities it requires, the project implementation procedure, and the answers to the most common questions buyers ask before purchasing.

A Third-Generation Full-Servo Machine for Plastic Woven Valve Sacks

The FK008-III is an independent Gachn design protected by its own patents, so customers can operate it without infringement concerns. It adopts a full servo control system built around a Schneider PLC and servo drives, which keeps the dynamic error below 0.01 mm even at high running speed. The bilingual human-machine interface displays parameter settings, fault warnings and production counting, so ordinary workers can master operation after 1-2 days of training instead of relying on highly skilled technicians.

Bag Specifications and Applicable Industries

The machine mainly produces PP woven single-layer coated valve sacks for finished package weights from 10 kg to 50 kg, with typical bag body weight of 75 g ± 2 g. The supported specification range is:

• Bag width (W1): 300-620 mm
• Bag length (L1): 360-750 mm
• Inner valve width (W3): 80-200 mm
• Outer valve width (W4): 130-300 mm

It processes PP and HDPE woven fabrics, including PE-laminated material for improved moisture protection. These sizes cover the standard packaging needs of the chemical, cement, grain and building materials industries, and the machine has been adapted to raw material characteristics and production standards in different regions.

Output, Precision and Continuous Operation

The FK008-III holds a stable production speed of 110-120 bags per minute. Its dust-resistant and voltage-fluctuation-resistant design supports operation from -20°C to 60°C, with a failure rate below 0.5% and the ability to run continuously for up to 30 days without scheduled downtime. For a large-scale mass production plant, this combination of speed and stability is what turns the bag making station into a reliable bottleneck-free link.

Patented Processes That Lower Material and Energy Cost

Two patented design points directly improve the economics of every bag. First, the patented bottom sealing technology uses single-sided film with a narrow bottom overlap, saving about USD 1 of raw material for every 500 bags — roughly USD 60,000 per year on a line with an annual capacity of 30 million bags. Second, vector frequency conversion cuts motor energy consumption by 10-30%, and the machine enters a standby mode automatically when idle while boosting pressure intelligently under heavy load.

The patented triangular bag opening technology is another key differentiator. Instead of suction cups that wear out from repeated contact, the machine forms the bag opening with vacuum negative pressure. This contactless approach makes bag opening faster and more stable, and reduces replacement of easily worn parts by about 90%.

AI Visual Inspection and Labor Savings

The FK008-III can be equipped with an AI visual inspection system that covers two defect groups: base fabric defects (round threads, holes, coarse threads, joints, scratches) and bag-making defects (bottom sticker misalignment, sticker folding, missing corners, incomplete sealing). The system identifies defects adaptively without manual marking, achieving a false negative rate as low as 0.05% — more than three times more accurate than manual inspection — and tracks defect data in real time for process optimization.

With the AI system in place, one operator can manage 3-4 machines at the same time, reducing labor cost by about 240,000-360,000 RMB per production line per year. For overseas plants where skilled operators are scarce, this directly lowers both payroll and training burden.

Factory Space, Power and Utility Requirements

Before installation, customers should prepare the site according to the following standard configuration:

• Single machine footprint: about 12 m long x 7.5 m wide x 2.5 m high
• Recommended whole production line building: no less than 85 m x 60 m, including equipment and material handling area
• Power supply: 380 V three-phase five-wire, total power 150 kW, operating power 60 kW
• Cooling water: 0.6 cubic meters per hour flow
• Compressed air: 6-7 bar, 3 cubic meters per minute

These are conventional industrial plant conditions. Customers can prepare them in advance and confirm details with Gachn engineers during project planning.

Turnkey Project Implementation and After-Sales Support

Gachn supports each FK008-III project from factory to first production run:

• 100% full-machine testing before shipment, with export-standard ocean packaging and customs clearance assistance
• 8 professional technicians provide on-site service; installation, commissioning and trial production are completed within 30 days after arrival
• Trial production parameters are optimized until the product qualification rate reaches the agreed level before acceptance
• Bilingual operation manuals and video tutorials, plus hands-on theory-and-practice training for local teams
• 12-month full-machine warranty (electrical and mechanical), free electrical control system upgrades within 3 years, and 24-hour response for fault inquiries

Conclusion

Whether a plant is building a new valve sack production line or upgrading existing bag making equipment, the FK008-III plastic woven valve sack making machine provides a documented combination of speed, precision, material savings and intelligent inspection. With complete line solutions from drawing, circular weaving, coating and printing to bag making — supported by more than 200 national patents — Gachn can plan, deliver and commission the equipment that matches each customer's capacity target. Contact Gachn for equipment selection advice, capacity calculation and a detailed quotation.

FAQ

What kind of valve bags can the FK008-III produce?
The FK008-III mainly produces PP woven single-layer coated valve sacks for finished package weights from 10 kg to 50 kg, with a typical bag body weight of 75 g ± 2 g.

What bag sizes does the machine support?
Bag width (W1) 300-620 mm, bag length (L1) 360-750 mm, inner valve width (W3) 80-200 mm, and outer valve width (W4) 130-300 mm.

What is the production speed and stability of the machine?
It runs stably at 110-120 bags per minute with a dynamic error below 0.01 mm, a failure rate below 0.5%, and the ability to operate continuously for up to 30 days.

What raw materials does the FK008-III require?
The line is designed for PP drawing grade material with MFI 3.5-5.0 g/10min (230°C) and PP coating grade material with MFI 18-40 g/10min, or an 85% PP + 15% LDPE mix. Gachn adjusts machine settings according to customer raw material samples.

What factory utilities are needed to install the FK008-III?
A 380 V three-phase five-wire power supply (total 150 kW, operating 60 kW), cooling water flow of 0.6 m³/h, and compressed air of 6-7 bar at 3 m³/min. The single machine area is about 12 m x 7.5 m x 2.5 m.

Is the AI visual inspection system standard?
It is an optional module. When enabled, it detects base fabric and bag-making defects with a false negative rate as low as 0.05% and lets one operator manage 3-4 machines.