281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
ISO 9001:2015
U.S. Patents
80 + U.S. Patents
Since 1954
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inLoop™ RFP

inLoop RFP

Refined Bypass Sampler

The Welker inLoop™ RFP is a double-acting bypass sample pump designed to take quality samples of refined products, such as diesel, gasolines, and jet fuel. Incorporate the inLoop™ RFP into your blend header or refined product sampling system to ensure repeatable representative samples.

Outer Limits

External Sample Volume Adjustment

With a variety of volume options and an external volume adjustment, the inLoop™ RFP can be easily set to suit your sampling requirements. With a larger range of sample volumes, the sampler does not have to be operated as fast as similar samplers, which in turn prevents wear and tear.

External Adjustment


inLoop RFP Sample Pump
 inLoop RFP
Materials of Construction316/316L Stainless Steel Wetted Parts, Aluminum, Viton®
Pressure LimitActuation: 30-225 psig
Injection: 1800 psig
Power End: 225 psig
Injection Volume5 cc
10 cc
25 cc
30 cc
50 cc
61.5 cc
100 cc
150 cc
300 cc
Operating Pressure1800 psig MAOP @ -20 °F to 120 °F