QED Environmental Systems is the leading manufacturer of innovative environmental products.
For over 35 years their expertise has included Pumping Systems, Landfill Products, and Air Strippers.

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Precision Quick-Change Orifice Plate Wellhead - Overview

Precision Quick-Change™ Orifice Plate Wellhead

orp wellhead

Quick-Change Orifice Plates

QED’s new Precision Quick-Change™ Orifice Plate Wellhead (U.S. Patent Number 8,800,597 & Patents Pending) combines easy plate exchanges for accurate flow measurements with precise adjustment control over a broad flow range.

The Quick-Change Orifice Plate feature makes it as easy as 1-2-3 for the operator to change to the most appropriate size plate for the given conditions. Achieving a pressure drop of 0.5" - 5.0" of water column is essential to generate stable flow readings with the best resolution. The accessible plate housing allows for easy confirmation of plate size and placement giving you the highest confidence in your flow reading.

The wellhead control valve design allows you to finely control gas flow even at rates under 10 scfm. The unique design will change the way operators adjust gas flow. Wells can now be tuned by flow rather than by vacuum.

Quick-Change Orifice Plates

QED’s Quick-Change Orifice Plates are available in stainless steel and plastic. With several sizes of orifice plate available, it is easy to select the right plate for the appropriate pressure drop allowing for accurate flow measurement readings.

Vertical Wellheads

Standard wellheads configurations.


ORP115M - 1.25"


ORP215M - 2"


ORP315 - 3"

Horizontal Wellheads

The ORP215 wellheads are also available in horizontal configurations.

Horizontal Wellhead HV





pdfLFG Products brochure1.32 MB

pdfWellheads brochure746.72 KB

pdfFine Tune Control Valve™ Datasheet304.34 KB

pdfWellcap Datasheet238.11 KB


Introducing the new molded wellhead for 2" wellheads.

Learn more

Quick-Change™ Orifice Plate Advantages

Orifice Plate diameter

  • Easy-to-change plates are visible through accessible plate housing
  • Plates can be changed in seconds saving valuable time
  • Accurate flow measurements – match the right plate with the gas flow
  • Fine-tuned adjustment over entire range of control valve movement

Orifice Plate Selector Guide

Quick-Change Orifice Plate Selector Guide