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HGS

Heated composite gas sampling for natural gas near the hydrocarbon dew point

The Welker HGS Heated Gas Sampler is designed for representative composite sampling of natural gas at or near the hydrocarbon dew point. Mounted directly to the pipeline inside an insulated, corrosion-resistant enclosure, the HGS maintains the sampler temperature above the hydrocarbon dew point to help prevent condensation, phase change, and sample distortion. With Welker’s Fresh Sample System™, a positive displacement piston sample pump, purge manifold, heater with thermostat, and optional timer/controller, the HGS supports accurate natural gas sampling proportional to flow or time in harsh environments and remote field locations.

Where to Use
Composite Sampling Natural gas at or near the hydrocarbon dew point where heat is needed to help prevent condensation, phase change, and sample distortion
Custody Transfer Billing-quality measurement at sales points
Cold Climate Locations North of the 32nd parallel north or south of the 32nd parallel south, where ambient conditions may require heat
Sample Condition
Complies with: API 14.1 GPA 2166 ISO 10715 AGA Manual

Welker Fresh Sample System™

Self-purging design helps ensure a fresh, representative natural gas sample with every sample cycle.

Positive Displacement Piston Sample Pump

Collects repeatable fixed-volume samples at line pressure for accurate composite gas sampling.

Inline Relief at Sample Outlet

Helps prevent collected samples from flowing back to the pipeline if pipeline pressure drops.

Purge Manifold With Pressure Gauge

Allows operators to purge and monitor the sampling process for dependable field operation.

Heater With Thermostat

Maintains internal temperature above the hydrocarbon dew point to help prevent condensation and phase change.

Insulated Corrosion-Resistant Enclosure With External Temperature Gauge

Protects sampling components in harsh or remote environments while allowing quick temperature visibility.

Optional Welker 6Tc Timer/Controller

Supports sampling proportional to flow or time without requiring an external power supply.

Specifications
HGS
More Information
Product Category : Natural Gas Sampling
Composite Sampler
Maximum Allowable Operating Pressure : 1440 psig @ -20 to 120 °F
Solenoid : ½" FNPT
Product Inlet : ⅛" FNPT
Relief Outlet : ¼" FNPT
Utility Requirements : Pneumatic: 65–70 psig
Electrical : Electric Heater: AC 110 V
Solenoid: DC 12 V or DC 24 V
Sample Volume : 0.25 cc
Operation : MPS-2: Piston-Operated
Industry Standards : Complies with GPA 2166, API 14.1, ASTM D5287, IS0 10715

Weight and/or dimensions are approximate.

Specifications subject to change without notice.

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