Flow Venturi for PUF Sampler SKU: TE-1003-4

The TE-1003-4 Flow Venturi is a critical orifice component designed specifically for Tisch Environmental PUF (Polyurethane Foam) air sampling systems. This device is a critical orifice used to control the amount of flow through the sample media and serves as the primary flow measurement device for EPA-compliant pesticide and volatile organic compound monitoring.

Operating Principle

It has a set of barbed hose fittings to record the differential pressure as it passes through the orifice. Air flow rate is measured through the flow venturi utilizing a 0-100" Magnehelic Gage. The venturi creates a controlled pressure drop that correlates directly to the volumetric flow rate, enabling accurate flow measurement and control throughout the sampling period.

Key Specifications

• Flow range: 125-250 Liters per Minute
• Pressure measurement range: 0-100" Magnehelic Gage
• Barbed hose fittings for differential pressure measurement
• Compatible with both manual and PLUS technology flow controllers

System Compatibility

The TE-1003-4 Flow Venturi is designed for use in complete PUF sampling systems and is compatible with:

• TE-1000 PUF Sampler systems
• TE-1004 PUF Blower Motor Assembly
• TE-5010 Motor Voltage Control systems
• TE-1005 Magnehelic Gauge (0-100" range)
• Both brush-style and brushless motor configurations

EPA Method Compliance

These systems are designed to meet the requirements described for sampling using US EPA method TO-4A, TO-9A, and TO-13A. The flow venturi enables accurate flow measurement essential for:

• EPA Method TO-4A - Pesticides and PCBs in ambient air
• EPA Method TO-9A - Dioxins and dibenzofurans in ambient air
• EPA Method TO-13A - Polycyclic aromatic hydrocarbons in ambient air

Calibration and Maintenance

Periodic calibration is necessary to maintain on-site sampling accuracy. The venturi works in conjunction with the magnehelic gauge to provide real-time flow indication during sampling operations. The tubing on the hose barb is either connected to the magnehelic gauge to report the pressure drop or to the flow controller on systems that are equipped with PLUS technology.

This flow venturi is an essential component for maintaining EPA-compliant flow rates in PUF sampling applications, ensuring accurate collection of airborne particulates and vapor-phase contaminants for environmental monitoring programs.