一、Product Overview

The Manual Stainless Steel Online Sampling Valve with Nitrogen Purge Port is designed for safe, clean, and accurate sampling directly from process pipelines.

It is particularly suitable for viscous or low-flow media that may remain inside conventional sampling outlets. The integrated nitrogen purge connection allows nitrogen gas to purge residual media from the sampling passage into the sample bottle, helping minimize residue, cross-contamination, and sampling errors.

The valve features a compact stainless steel construction, precision flow control, dual stem sealing, and a removable sample bottle. It can be installed directly on the main process pipeline for convenient online sampling without significantly restricting the main process flow.

It is suitable for applications in chemical processing, petroleum refining, pharmaceutical production, food processing, power plants, and other industrial process systems.

二、Key Features

1. Nitrogen Purge Design
   An integrated nitrogen purge port helps clear viscous or residual media from the sampling passage, providing a cleaner sample path and improving sampling consistency.
2. Online Pipeline Sampling
   Designed for direct installation on the main process pipeline, allowing operators to collect samples without interrupting normal process operation.
3. Low-Retention Flow Path
   The internal flow passage is designed to minimize dead space and media retention while reducing unnecessary resistance to the main pipeline flow.
4. Dual Sealing Protection
   The valve incorporates multiple sealing points. The valve stem uses an O-ring and packing combination to help prevent process media leakage during operation.
5. Precise Sampling Flow Control
   The conical sealing structure at the sampling outlet allows controlled adjustment of the sampling flow rate and sample volume.
6. Easy Manual Operation
   The handwheel-operated design provides smooth operation with relatively low operating torque, making routine sampling simple and convenient.
7. Removable Sample Bottle
   The detachable sample bottle can be removed after sampling and sealed with a matching cap, helping protect the collected sample from external contamination. Transparent and light-protective bottle options are available.
8. Corrosion-Resistant Stainless Steel Construction
   The valve body is manufactured using integral precision casting and solution treatment to improve corrosion resistance, including resistance to intergranular corrosion.

三、Working Principle

During sampling, the operator rotates the handwheel to actuate the valve stem and valve core. The vertical movement of the valve core controls the opening of the sampling passage, allowing the operator to regulate the flow rate and required sampling volume.

For viscous media, nitrogen can be introduced through the purge port to push residual process media through the sampling passage and into the sample bottle. This helps reduce residual material inside the outlet and prepares the sampling path for cleaner subsequent sampling.

After sampling is completed, the detachable bottle can be removed and sealed for storage, transportation, or laboratory analysis.

四、Main Components

The sampling valve assembly mainly consists of:

• Stainless steel valve body
• Valve core and valve stem
• Valve seat
• Manual handwheel
• Sampling outlet
• Nitrogen purge port
• Check valve
• Purge ball valve
• Pressure regulator and gauge
• Removable sample bottle

The source document specifically identifies the valve body, valve core, valve stem, valve seat, exhaust port, nitrogen purge port, check valve, purge ball valve, and sample bottle as the main components.

五、Typical Applications

This online sampling valve is suitable for process sampling applications involving liquids and viscous media in industries such as:

Chemical Processing · Oil & Gas / Refining · Pharmaceutical · Food Processing · Power Plants · Industrial Process Systems

It is especially useful where clean sampling, reduced media retention, controlled sampling volume, and nitrogen-assisted purging are required.

六、Technical Specifications

Your original document also states that the structure length and connection dimensions can be designed and manufactured according to customer requirements.

七、Advantages

The combination of online sampling, nitrogen purging, low-retention flow design, dual sealing, precise flow adjustment, and a detachable sample bottle makes this valve suitable for industrial processes where sample integrity and operational cleanliness are important.

For viscous media in particular, the nitrogen purge function helps remove material remaining around the sampling outlet, reducing residue and making repeated sampling more convenient.

八、Customization

Different connection sizes, structural lengths, sample bottle configurations, and valve dimensions can be customized according to pipeline conditions and application requirements.

For special media, operating conditions, or connection standards, please provide your medium, pipeline size, operating pressure, operating temperature, and required connection type when requesting a quotation.

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