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Thumbnail Filmstrip of VFC for PM10 Hi-Vol Air Sampler - 110V Brushless Motors Images
The TE-10557PM10BL volumetric flow controller (VFC) delivers precise flow rate control for PM10 high volume air samplers equipped with 110 volt brushless motor systems. This critical orifice-based controller uses a predetermined orifice hole diameter to maintain constant flow rate through the PM10 inlet, ensuring EPA-compliant particulate sampling for ambient air quality monitoring.
Operating Principle
The motor on VFC systems operates wide open while the critical orifice maintains a constant flow rate. The volumetric flow control system maintains a constant volumetric flow rate through the PM10 inlet using a choked-flow venturi operated such that air attains sonic velocity in the throat. This design ensures consistent sampling performance regardless of downstream pressure variations.
Key Specifications
- 110 volt AC power requirement
- Compatible with brushless motor systems only
- Includes calibrated VFC orifice and look-up table
- Maintains constant volumetric flow rate
Compatibility
This VFC is specifically designed for Tisch Environmental PM10 high volume air samplers with brushless motor configurations operating at 110 volts. Brushless motors do not use motor brushes or require maintenance, are higher in cost and do not have emissions. The controller is not compatible with brush-style motor systems - verify your motor type before ordering.
Installation and Maintenance
The TE-10557PM10BL includes a precision-drilled critical orifice calibrated for specific flow rates and a corresponding look-up table for volumetric flow calculations. The critical orifice is calibrated in a NIST traceable lab to determine the volumetric flow rate. Installation requires proper seating of the orifice assembly and connection to the motor control system.
EPA Compliance Applications
Essential for 40 CFR Part 50, Appendix J PM10 reference method sampling. PM10 high volume samplers collect particulates at flow rates between 36-60 ft³/min through size-selective inlets, with larger particulates trapped in the inlet while PM10 particulates continue through and collect on 8″ x 10″ filters. Used in ambient air quality networks, industrial monitoring, and environmental compliance programs requiring accurate PM10 data.