13839 West Bellfort Street Sugar Land, TX

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ISO 9001:2015

U.S. Patents

90+ U.S. Patents


Since 1954

Turnkey Solutions

Tailored For You


Where to Use

  • City Gate Stations
  • Distribution Pipelines
  • Municipalities
  • Renewable Natural Gas (RNG), Biogas, and Biomethane Odorization
  • Grain Dryers
  • Industrial Plants
OdorEyes ESG    

The Welker ECOsystem™ Pumpless Vapor Injection System is a turnkey odorization system for proportional to flow natural gas odorization in low, high, and variable flow conditions for locations with a regulated pressure differential.

Welker Original triple solenoid systems—with a low flow, high flow, and backup solenoid—are ideal for locations with wide variations in flow rate.


  • Conditioned unodorized upstream gas is used as the blanket pressure source
  • High turndown
  • High-wattage solenoids and few moving parts
  • All serviceable components are upstream of the odorant tank


  • Zero emissions
  • Accurate proportional to flow odorization across a wide operational range
  • Highly reliable
  • Odor-free maintenance
More Information
Product Category : Odorization
Maximum Allowable Operating Pressure : 1500 psig (530 barg)
Electrical : AC 120 V
DC 24 V
Flow Rate : 2 MMscfh
Tank Volume : 20 US Gallons (75 L)
60 US Gallons (227 L)
120 US Gallons (454 L)
250 US Gallons (946 L)
500 US Gallons (1892 L)
Features : Odorant Tank Level Gauge
Skid With 110% Containment
Temperature Transmitter
Welker Program and Touch Screen Controller
Options : Solar Panel
Steel Building or Sunroof
Maximum Injection Pressure : 500 psig (34 barg)

Weight and/or dimensions are approximate.

Specifications subject to change without notice.

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