281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
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CP-2 (Sampling)

The Welker CP-2GM Constant Pressure Sample Cylinder is recognized for its versatile abilities to safely transport a sample in original pipeline condition and provide a uniform mix using the internal Gravity Mixer™ prior to lab analysis.

Proven Safety


Proven safety allows user to control and monitor pressure at all times.


Gravity Mixer®

Internal Gravity Mixer™ provides a proper sample mix for accurate lab analysis.

CP-2GM Gravity Mixer

Cylinder Design

Product and pre-charge sides with floating piston. Pre-charging the back side of the piston protects against phase change.


CP-2GM Sampling Constant Pressure Container
Materials of Construction316/316L Stainless Steel
Seal MaterialViton®
Sample Inlet Connections1/4" FNPT
Sample Outlet Connections1/4" FNPT
Cylinder Volume500 cc
Cylinder Mixer TypeGravity Mixer™
Cylinder AccessoriesRupture Disc, Reliefs, Valves, and Gauges
Operating Pressure1800 psig MAOP @ -20 °F to 120 °F
Transport ApprovalsDOT-SP 7657
Transport Canada SU 4781*
Industry StandardsComplies with API 8.1, API 14.1, ASTM D1265, ASTM D3700, ASTM D4057, GPA 2166, GPA 2174,
ISO 3170, ISO 4257, and ISO 10715