Flat Poly Bags 18″ x 36″ 4 mil 200/CTN

Pump & Valve Assembly Poly Bags — 18 x 36 in., 4 mil LDPE

These heavy-duty flat poly bags are sized for long-form industrial components including pump assemblies, valve bodies, hydraulic cylinders, and similar machined parts. At 18 x 36 inches and 4 mil thickness, they provide industrial-grade puncture and moisture resistance for demanding storage and shipping environments.

Specs: 18 x 36 in. | 4 mil | Virgin LDPE | 200/Carton | FDA Compliant

Applications

• Pump and valve assembly bagging for MRO and industrial distribution
• Hydraulic cylinder and actuator component protection
• Long machined parts storage and inter-facility transfer
• Industrial hardware kitting and packaging lines
• OEM parts shipping for fluid control equipment

Features

• 4 mil nominal thickness — industrial strength for heavy, dense components
• Open-end format for fast, flexible loading of varied part sizes
• Compatible with heat sealing, tying, stapling, or taping
• Virgin LDPE construction — high elongation resists tearing under load
• FDA compliant resin suitable for food-adjacent applications

Material Notes

Manufactured from 100% virgin Low Density Polyethylene (LDPE) resin. At 4 mil, LDPE provides a tough, flexible barrier against moisture, abrasion, and contamination. High elongation-at-break makes this gauge resistant to puncture from sharp-edged machined components. All gauge specifications are nominal.

Use Case Notes

The 18 x 36 inch format accommodates most mid-length industrial assemblies including gate valves, ball valves, single-stage pump housings, and similar components. The 4 mil wall is sufficient for parts up to moderate weight without bagging multiple components per unit.

Common Questions

Q: What is the maximum weight load for these bags?
A: These bags are rated for moderate industrial components. For very heavy or sharp-edged parts exceeding 20 lbs., a heavier gauge (6 mil) or double-bagging is recommended.

Q: Can I use these with a band sealer for automated lines?
A: Yes. 4 mil LDPE seals cleanly on standard impulse and continuous band heat sealers at settings appropriate for this gauge.

Q: Are these FDA compliant?
A: Yes. The virgin LDPE resin meets FDA specifications for food-contact use, though these bags are primarily specified for industrial applications.

Why Buy

Sold 200 per carton at wholesale pricing, these bags are appropriate for high-throughput industrial packing lines. The 18×36 format covers a broad range of long-form component sizes without requiring multiple SKUs, reducing procurement complexity for MRO and distribution operations.