Standard Laboratory Test Sieve for Cement Fineness
Product Overview
The Cement Negative Pressure Test Sieve is a precision laboratory sieve designed for cement fineness testing under negative pressure conditions.
It complies with GB/T 1345-2005, ISO 565, and ISO 3310-1 standards, ensuring high accuracy and consistency.
It is suitable for testing the fineness of Portland cement, ordinary Portland cement, slag Portland cement, fly ash Portland cement, and composite Portland cement, making it an essential tool for cement plants, laboratories, and quality inspection agencies.
Construction
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Sieve Mesh Material
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SUS304 / SUS316 stainless steel woven mesh
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Brass / phosphor bronze mesh
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Frame Material
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Chrome-plated steel frame: High strength, durable, corrosion-resistant
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Engineering plastic frame: Lightweight, chemical-resistant, easy handling
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Mesh Fixing Method
Pressed-in and adhesive-sealed construction for flatness and durability. 
Technical Specifications
| Item | Specification |
|---|---|
| Standard Compliance | GB/T 1345-2005; ISO 565; ISO 3310-1 |
| Sieve Diameter | 150 mm |
| Common Apertures | 45 μm (standard); optional 40 μm, 63 μm, 75 μm, 90 μm |
| Mesh Material | SUS304 / SUS316 stainless steel; Brass / Phosphor bronze |
| Weaving Type | Plain weave, ISO 3310-1 compliant |
| Frame Material | Chrome-plated steel / Engineering plastic |
| Frame Height | 25 mm – 40 mm |
| Frame Thickness | ≥ 1.0 mm |
| Mesh Fixing | Pressed-in + Adhesive sealed |
| Aperture Tolerance | ±3% (ISO 565 compliant) |
| Service Life | ≥ 500 cycles |
| Working Temperature | 0℃ ~ 120℃ |
| Weight | ~160g (Chrome) / ~120g (Plastic) |
Mesh Aperture Reference Table
| ISO Sieve No. | Aperture (μm) | Typical Application |
|---|---|---|
| No.30 | 600 μm | Coarse particle screening |
| No.40 | 400 μm | Coarse separation |
| No.60 | 250 μm | Medium particle classification |
| No.80 | 180 μm | Auxiliary particle analysis |
| No.100 | 150 μm | Precision particle control |
| No.325 (Standard) | 45 μm | Standard aperture for cement fineness testing |
Key Features
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High Precision – ISO-compliant sieve openings for accurate, repeatable results.
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Material Options – Stainless steel or brass mesh for different test environments.
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Frame Options – Chrome-plated steel for durability, engineering plastic for lightweight usability.
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Strong Bonding – Firm mesh-frame bonding ensures stability and flatness.
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Optimized for Vacuum Testing – Designed specifically for negative pressure cement fineness tests.
Application Range
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Portland Cement
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Ordinary Portland Cement
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Slag Portland Cement
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Fly Ash Portland Cement
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Composite Portland Cement
Package Contents
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Standard Sieve ×1
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Vacuum Sieve Sealing Ring ×1
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Transparent Top Cover ×1
Compliance Standards
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GB/T 1345-2005 — Test method for fineness of cement
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ISO 565:1990 — Test sieves – Technical requirements
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ISO 3310-1:2016 — Test sieves of metal wire cloth