Lid Assembly for HDPE Storage Containers

Product Specifications

Technical details and manufacturing context for Lid Assembly

Definition

A lid assembly is the integrated closure system for a High-Density Polyethylene (HDPE) storage container. It typically consists of a main lid body, a sealing gasket, and a latching or locking mechanism. Its primary role is to provide an airtight and watertight seal to protect the container's contents from contamination, moisture, and spillage, while also facilitating secure opening and closing. The assembly is designed to match the container opening size, with a sealing diameter ranging from 63 to 120 mm, and an overall height of 30 to 60 mm, which affects stacking and handling. The weight ranges from 50 to 150 g, influencing shipping costs. The material grade is HDPE, UV-stabilized for outdoor use, conforming to ASTM D4976. The operating temperature range is -40 to 85 °C; outside this range, cracking or deformation may occur. The operating pressure is 1.0 to 1.6 MPa, with a leakage rate of 0 to 0.1 mL/min at 1.5 times the operating pressure. The torque to open is 2 to 5 N·m; higher torque may indicate overtightening. The cycle life is 10,000 to 20,000 cycles based on open/close testing. The sealing force is 50 to 100 N, ensuring leak-proof closure. Dimensional tolerance on diameter is ±0.2 mm per ISO 2768-m, and surface roughness is 0.8 to 1.6 µm per ISO 4287, affecting friction and sealing. These values are directory reference ranges and must be confirmed for the actual model and application with the legal manufacturer or supplier. The lid assembly is a component used in rubber and plastic product manufacturing, specifically for HDPE storage containers.

Working Principle

The lid assembly creates a seal by pressing a flexible gasket against the rim of the container body. A latching mechanism (e.g., toggle clamps, screw threads, or snap-fit features) applies and maintains the necessary compressive force to deform the gasket, ensuring a complete seal around the perimeter of the container opening. The sealing force is typically 50 to 100 N, which is sufficient to achieve a leak-proof closure. The gasket material, typically silicone or rubber, conforms to the rim surface, compensating for minor irregularities. The operating pressure range is 1.0 to 1.6 MPa, and the leakage rate is maintained below 0.1 mL/min at 1.5 times the operating pressure. The torque required to open is 2 to 5 N·m, indicating proper sealing without overtightening. The assembly is designed for a cycle life of 10,000 to 20,000 open/close cycles. The sealing diameter and overall height are matched to the container opening, and the dimensional tolerance on diameter is ±0.2 mm to ensure a consistent fit. The surface roughness of the sealing surfaces is 0.8 to 1.6 µm to optimize friction and sealing performance.

Common Materials

High-Density Polyethylene (HDPE), Silicone or Rubber (Gasket)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Sealing Diameter	63–120 mm	Matches container opening size
Overall Height	30–60 mm	Affects stacking and handling
Weight	50–150 g	Influences shipping cost
Material Grade	HDPE	UV-stabilized for outdoor useASTM D4976
Operating Temperature	-40–85 °C	Outside range may cause cracking or deformation
Leakage Rate	0–0.1 mL/min	At 1.5× operating pressureISO 5208
Torque to Open	2–5 N·m	Higher torque may indicate overtightening
Cycle Life	10000–20000 cycles	Based on open/close testing
Sealing Force	50–100 N	Ensures leak-proof closure
Tolerance on Diameter	±0.2 mm	Critical for sealing performanceISO 2768-m
Surface Roughness	0.8–1.6 µm	Affects friction and sealingISO 4287

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Lid Body Part
The main structural component that covers the container opening.

Material: High-Density Polyethylene (HDPE)
Sealing Gasket Part
A flexible ring that compresses against the container rim to create an airtight and watertight seal.

Material: Silicone or EPDM Rubber
Latching Mechanism Part
Hardware (e.g., clamps, latches) that secures the lid to the container body under pressure.

Material: Polypropylene or Stainless Steel

Manufacturers of Lid Assembly

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Frequently Asked Questions

What is the sealing diameter range for this lid assembly?

The sealing diameter range is 63 to 120 mm, matching the container opening size. This is a reference range; confirm the exact value for your specific container model with the manufacturer.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C. Operating outside this range may cause cracking or deformation of the HDPE material. Always verify the limits for your application.

What standards are referenced for leakage and pressure?

The operating pressure and leakage rate are. The leakage rate is 0 to 0.1 mL/min at 1.5 times the operating pressure. These are verification references, not proof of certification.

How many open/close cycles can the lid assembly withstand?

The cycle life is 10,000 to 20,000 cycles based on open/close testing. This is a reference range; actual durability depends on usage conditions and maintenance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 1.5 bar (sealing pressure)
other spec:	Container opening diameter tolerance: ±0.5mm, Seal compression force: 15-25 N
temperature:	-40°C to 80°C

Lid Assembly

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards