Schopper Permeability Tester ZY-TQD10

Application：

The ZY-TQD10 Schober Permeability Tester is designed and manufactured in accordance with the national standard QB/T 1667, “Testing Instrument for Permeability of Paper (Schober Method).” This instrument is specifically designed for testing the permeability of materials and can be applied to a wide range of paper types, such as cement bag paper, paper bag paper, cable paper, carbon paper, and industrial filter paper, all of which require permeability testing.
This paper air permeability tester is suitable for paper with air permeability ranging from 1×10⁻² to 1×10² μm/(Pa·s). It is not suitable for paper with high surface roughness.

Principle of Operation：

Under specified conditions, the average air flow rate passing through a unit area of the filter paper per unit time and per unit pressure difference, expressed in micrometers per Pascal [1 μm/(Pa·s)] = 1 mL/(m²·Pa·s).

Standards：

ISO 5636-1 “Determination of air permeability of paper and paperboard (medium-range method)”
GB/T 458 “Determination of air permeability of paper and paperboard”
QB/T 1667 “Air permeability testers for paper and paperboard”

Key Performance Advantages：

The pressure gauge bracket features an anodized aluminum alloy structure for corrosion resistance;
The valves are made of pure copper to prevent rust and valve blockage;
Both the upper and lower end caps are made of stainless steel, ensuring they will not rust even after prolonged contact with water;
The sample clamps feature an internal structure to prevent rubber pads from falling off due to prolonged use;

Scope of Application for the Air Permeability Tester：

Paper, kraft paper, cement bag paper, paper bag paper, cable paper, carbon paper, and industrial filter paper, etc.

Parameter	Specification
Measurement Range	Range A (0–1000) ml/min, Range B (0–5000) ml/min, Range C (0–10000) ml/min, Range D (0–100000) ml/min (Ranges B, C, and D are optional)
Pressure Range	0.1 kPa–2.0 kPa
Test Area	The standard test area is 10 ± 0.2 cm²; the test specimen must be larger than this size
Test Area Pressure Differential	The standard test pressure differential is 1 ± 0.01 kPa; other pressure differentials can be customized for special materials upon request
Measuring Head	304 stainless steel air permeability measuring fixture with aging-resistant silicone seals
Measurement accuracy	<100 ml, error ±1 ml; >100 ml, error ±5 ml
Material of upper and lower separators in measuring cylinder	Corrosion-resistant material (stainless steel) to prevent corrosion issues during long-term use
Manometer bracket	Corrosion-resistant structure made of anodized aluminum alloy
Tubing Material	Silicone tubing is used to prevent aging issues caused by long-term use
Valve Material	Pure copper valves are used to prevent rust and valve blockage
Clamp Ring Inner Diameter	Standard sample clamping inner diameter: 35.68 ± 0.05 mm
Coaxiality of Upper and Lower Clamp Ring Center Holes	Coaxiality is strictly controlled, with a deviation of <0.05 mm
Environmental Conditions	Temperature: (0–35) °C, Humidity < 85%
Dimensions	400 × 300 × 1200 mm
Weight	Approximately 38 kg