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Toxic Organics Valve 2


  • It’s Repairable!
  • Silonite–D® Coated Flow Paths
  • Packless System
  • EPA Methods TO-14A and TO-15 Ready
  • Ultra-Compact Design
  • Silonite® Flow Path

TOV-2™ The “next generation” Toxic Organics Valve

Introducing the packless, repairable valve designed specifically for Toxic Organics sampling and analysis

The TOV-2™ Toxic Organics Valve has been specifically designed to ensure complete recovery of low level TO-14a and TO-15 target compounds. A packless system features an ultra-compact, passivated sample path with no internal weld scars, and a Silonite® coating option for superior inertness and durability. The TOV-2 has Entech’s exclusive NF technology that uses replaceable nickel ferrules that exhibit less carryover relative to replaceable vespel or V/G ferrules. The TOV-2’s new “sure-seal” valve seat creates a leak-tight seal even more easily than before. A low cost kit is available so you can easily maintain valves at the peak of scientific reliability and performance. Ask your Entech Analytical Solutions Manager or Distributor about how this advancement can deliver maximum recovery with minimal carryover for assured compliance with new lower level VOC methods.

It’s Repairable!

Ever throw away an entire valve because it can no longer seal properly? A low cost repair kit is now available for the TOV-2™!

Silonite–D® Coated Flow Paths

Silonite-D® provides amazing inertness, durability, and corrosion resistance you can trust!

Packless System

The ultimate reliability in a metal sealing valve

EPA Methods TO-14A and TO-15 Ready

The Toxic Organics Valve™ and Entech’s Silonite® canisters are the most reliable way to  collect samples for EPA methods TO-14A and TO-15

Ultra-Compact Design

No other valve in its class can come close to matching the analytical transparency of the TOV-2™

Silonite® Flow Path

A Silonite® treated ow path is available for superior inertness, corrosion resistance, and trustworthy sampling

Silonite® Canisters with the NEW Toxic Organics Valve™ (TOV-2)

0.01–100 PPB Trace Level

Entech’s Silonite® canisters feature a large volume capacity for detection of volatile chemicals down to the low part per trillion range. An inert and durable internal Silonite® coating provides a high-quality, long-term sample storage solution. Losses in the valve are avoided by using our new Toxic Organics Valve™ (TOV-2™) which includes Entech’s new “sure-seal” technology and low carryover, replaceable nickel ferrules. An integrated valve guard is securely welded to the canister for superior light-weight valve protection without any stresses to the valve stem associated with heavy “strapped-type” valve guards. These canisters are certified to meet or exceed the technical specifications required for EPA methods TO-14a and TO-15. High quality performance is verified for EVERY canister with our demanding chemical inertness tests.

Field Canister Testing

We are the only manufacturer to offer the unsurpassed range, quality, and reliability of McDaniel Controls, Inc. gauges with ¼” compression fitting. The compression fitting connects easily to a dual stem canister, or our new dual port TOV-2™ without any need for Teflon® tape for improved canister cleanliness.


You can also choose to verify sample integrity in the field with the precision and reliability of the DDS™ Gauge. The digital gauge shown below features absolute pressure readings that are never affected by altitude!

We also offer high quality McDaniel® Gauge assemblies for easy field testing of standard TOV-2™ equipped canisters that do not have the included gauge option or a dual stem with an attached gauge.



Refinery Sulfur Gas Sampling

Low Pressure Reduced Sulfur (0.1–100 PPB)

high_pressure_cylinders-300x225Sulfur gases can be collected and analyzed using Silonite® coated samplers and canisters. Sulfur compounds have been shown to be stable in Silonite® canisters for 1–2 weeks, allowing sufficient time to perform laboratory analysis, even if samples must be shipped over long distances after sampling. Odor threshold levels can be met using GCMS or GC/CLD (Chemiluminescence Detector) when pre-concentrating 10–200cc of sample.

Maximum stability of H2S and Methyl Mercaptan requires relative humidity to be below 20%. When the relative humidity is above 20%, excess water can be absorbed using Bottle-Vac samplers that contain a small amount of anhydrous Silica gel. Just enough Silica gel is used to absorb most of the water without affecting H2S or Methyl Mercaptan concentrations, allowing these compounds to be stable for weeks. When monitoring a wider range of sulfur compounds, it is recommended to use two different samplers; the 29-BV500-H2S or 29-BVL1-H2S for H2S and Methyl Mercaptan, and a standard Bottle-Vac™ or Silonite® coated MiniCan™ or larger Silonite®canister for all other compounds. Silonite® coated cylinders are also available for high-pressure refinery gas sampling environments and long-term storage requirements.