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Welker inLoop RFP Refined Product Sample Pump

inLoop™ RFP

Repeatable bypass sampling for refined fuels and Reid vapor pressure analysis

The Welker inLoop™ RFP is a double-acting bypass sample pump designed for representative composite sampling of refined products, including diesel, biodiesel, gasoline, and jet fuel. Ideal for refinery blend headers, refined product pipelines, and applications requiring accurate Reid vapor pressure analysis, the inLoop™ RFP helps operators capture repeatable samples from bypass sampling systems. With externally adjustable sample volume, pneumatic or hydraulic actuation, multiple valve configurations, and optional LeakHawk™ leak detection, the inLoop™ RFP supports accurate refined product sampling while helping reduce emissions, maintenance concerns, and sample bias.

Where to Use

Refined Product Bypass Sampling

Composite sampling of diesel, biodiesel, gasoline, and jet fuel in refinery blend headers and refined product sampling systems.

Reid Vapor Pressure Analysis

Bypass composite sampling of refined product pipelines where accurate Reid vapor pressure analysis is required.

Fuel Quality Monitoring

Sampling refined fuels to monitor blend composition, sediment, and product quality.


Externally Adjustable Sample Volume

Allows operators to meet varying sample volume requirements without removing the sampler from the line.

Double-Acting Pneumatic or Hydraulic Actuation

Provides dependable sampling performance for refined fuel and light liquid applications.

Multiple Valve Configurations

Supports 3-way valves, 2-way valves, or 2 check valves to fit different refined product sampling needs.

Sump or Flare Connection Capability

Helps route emissions away from the atmosphere for cleaner operation and improved compliance.

Optional LeakHawk™ Leak Detection Manifold

Helps identify and address pump seal leaks before they become larger maintenance or compliance issues.

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