Grab Sampling Systems | Reliable, Safe, and Efficient Solutions

Using sets that don't work properly or are outdated

Depends on the operator's skill

Poses a risk of leakage or contamination

Does not have a standard procedure

The result: non-representative samples, variable calibration curves, and inconsistent measurement values due to phase shift, contamination, or pressure/temperature changes during sampling. This leads to incorrect analyzer calibration, unreliable trend monitoring, and an increased risk of process instability or undesirable product deviations.

A properly functioning grab sampling system, with correct sample conditioning, minimal dead spaces, controlled pressure drop and a closed, leak tight circuit, prevents these errors at the source and ensures that the sample accurately reflects the actual process conditions.

Safe and reliable sampling requires systems that are technically sound and meet your compliance requirements. That’s why Swagelok grab sampling systems are designed using proven sampling engineering, with carefully selected materials, a fully leak-tight construction, and user-friendly, ergonomic controls. This ensures that every sample remains representative and traceable.

Our engineers understand both your process and the standards you must meet. This combination makes these solutions practical, safe, and suitable for use in any audit-sensitive environment.

1. Analysis of your process

We examine pressure, temperature, medium properties, and risk points.

2. Determining the appropriate sampling method

Liquid, gas, low vapor pressure, purge, flush — the right approach for your system.

3. Selection of the appropriate system

Grab Sampling Module (GSM), Grab Sample Cylinder (GSC), or custom solutions.

4. Design, configuration, and documentation

Complete specifications, including materials, valves, restrictions, and operating flow.

5. Installation, training, and quality assurance

We ensure that your team can collect samples safely, accurately, and consistently.

Sampling ammonia is a precision task in which safety and reliability are paramount. In this case study, you’ll learn how a leading company partnered with Swagelok Netherlands to develop a solution that makes the sampling process safer, more efficient, and future-proof.

Including:

Significantly higher safety
More efficient sampling process
Fewer opportunities for error
Future-proof approach

Discover in the case study how smart engineering directly leads to safer working conditions and better process control.

“Thanks to Swagelok Netherlands, we now have a safe, efficient, and future-proof method for sampling ammonia. A solution that takes our process to the next level.”

Yara Sluiskil

Replacement is recommended in case of structural leaks, worn connections, changed process requirements, outdated standards, or when audits reveal deficiencies.

Customized solutions, high-quality components, local support, and proven reliability.

Within a few days after intake. Duration depends on your current system.

Yes. Swagelok systems feature leak-tight connections, pressure regulation, and safe cylinder transport solutions.

Yes, we’ll assess your current situation and replace or upgrade components as needed.

Yes. Many systems have specific requirements. Our engineers design customized solutions.

That depends on your process parameters, but our systems are designed to operate quickly and safely without downtime.

Grab Sample Module (GSM)

For: pressurized liquids or gases

The GSM is a closed-loop sampling system that uses metal, pressure-retaining cylinders. This keeps the sample under controlled process pressure and prevents it from escaping.

What does the GSM do?

Takes samples of liquids or gases in a pressure-retaining cylinder
Keeps the sample securely contained and prevents emissions
Uses a closed loop so the medium continues to circulate — without purging time
Prevents leakage by using Swagelok tube fittings instead of threaded connections

When should you choose a GSM?

For pressurized process conditions
When safety, reliability, and representativeness are critical
When the risk of breakage and leakage must be minimized

Grab Sample Liquid (GSL)

For: atmospheric liquid samples

The GSL is specifically designed for situations where the sample must be collected at atmospheric pressure—ideally in a laboratory bottle.

What does the GSL do?

Collects liquid samples in a pressure-free bottle
Features a self-sealing septum cap, keeping operators protected
Provides immediate visual inspection of the sample
Utilizes the new Grab Sample Valve (GSV) for safe and controlled dispensing

When should you choose a GSL?

When the sample must not evaporate or fractionate
For laboratories requiring rapid visual inspection
For liquids that can be safely sampled at atmospheric pressure

Ammonia Sampler

For: sampling of anhydrous ammonia (NH₃)

The Ammonia Sampler is a specially developed system that operates on a fully closed circuit, designed to eliminate the risks associated with traditional ammonia sampling.

What does this sampler do?

Takes ammonia samples without exposing the operator
Prevents harmful vapor formation and minimizes environmental impact
Delivers consistent and accurate results, regardless of operator skill
Reduces total sampling time from 8 hours to approximately 2 hours

When should you choose the Ammonia Sampler?

For ammonia installations in chemical, fertilizer, plastics, and petrochemical production
When safety and emission reduction are top priorities
For frequent quality control of water content (0.2–0.5%)