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DOPAK Closed Loop Sampling Systems Distributor in India

Priminox Overseas is the official distributor of DOPAK closed-loop sampling systems in Mumbai, India. These systems draw representative samples of liquids, gases, and liquefied gases from process lines, reactors, and storage tanks without exposing operators to hazardous media or releasing volatile substances to the atmosphere. We stock the DPM, HD, DPJ, DPT, S23, S32, S32-G, and S32-LG series across the closed vent range, with single-handle operation and zero dead volume on the coupled-valve models at our ISO 9001 and ISO 14001 certified Mumbai warehouse. The range covers low-vapour-pressure liquids below 0.7 bar, viscous liquids and slurries, liquefied gases, and gas streams, with process temperatures up to 650°C on the DPJ series.

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Complete Range of DOPAK Closed Loop Sampling Systems

Browse the closed vent series we hold for chemical, petrochemical, refining, and offshore process sampling. Every series ships with cap and septum bottles or sample cylinders, depending on the vapour pressure of the medium being sampled.

DOPAK DPM Series Closed Loop Sampling Systems Distributor in India

DOPAK DPM Series

  • Sample Type: Liquids with vapour pressure below 0.7 bar.
  • Operating Pressure: Up to 8 bar.
  • Applications: Corrosive and hazardous liquids, pipelines and tanks, zero emission sampling.
  • Configurations: On/off (A1, A2), system purge (A3), back purge (A4), needle purge (A5), back and needle purge (A6), system purge with continuous needle purge (A7), inline needle purge (A8).
  • Options: Flow control or pressure reducing device, portable sampler with air-driven membrane pump, vessel sampler with dip pipe and submerged pump.
DOPAK HD Series Closed Loop Sampling Systems Distributor in India

DOPAK HD Series

  • Valve Type: Fire-safe, antistatic process valves.
  • Sample Type: Liquids with vapour pressure below 0.7 bar.
  • Operating Pressure: Up to 8 bar.
  • Applications: Corrosive and hazardous liquids, pipeline and tank sampling.
  • Configurations: On/off (B1, B2).
DOPAK DPJ Series Closed Loop Sampling Systems Distributor in India

DOPAK DPJ Series

  • Valve Type: Piston valves with purged outlet for a clean sample value.
  • Sample Type: Viscous liquids, slurries, vacuum service, fixed-volume sampling.
  • Operating Pressure: Vacuum, below 8 bar, and elevated pressures above 8 bar.
  • Operating Temperature: Up to 650°C.
  • Applications: Sampling from pipelines, tanks, and reactors.
  • Configurations: Purge (C1), fixed volume (C2), fixed volume with cooling or heating jacket (C3), solvent purge (C4).
DOPAK DPT Series Closed Loop Sampling Systems Distributor in India

DOPAK DPT Series

  • Valve Type: Inline sample valves.
  • Sample Type: Liquids with vapour pressure below 0.7 bar, viscous liquids, slurries.
  • Operating Pressure: Up to 8 bar.
  • Materials: Stainless steel construction, with a PFA-lined version for corrosive service.
  • Configurations: Inline on/off (H1), inline continuous needle purge (H2).
DOPAK S23 Series Closed Loop Sampling Systems Distributor in India

DOPAK S23 Series

  • Valve Type: Internally coupled valves with zero dead volume.
  • Sample Type: Fixed-volume liquid sampling, low and elevated pressure, independent of process pressure.
  • Minimum Sample Volume: From 1 cc.
  • Operation: Single-handle operation.
  • Configurations: Threaded, welded or flanged (D1), continuous needle purge (D2), cooling or heating jacket (D3), third coupled valve (D4), high vapour phase HVP (D5), high temperature (D6), no purge (D7), no purge with cooling or heating jacket (D8).
DOPAK S32 Series Closed Loop Sampling Systems Distributor in India

DOPAK S32 Series

  • Valve Type: Externally coupled valves, zero dead volume.
  • Sample Type: Liquids at vacuum, below atmospheric, low and elevated pressures, viscous fluids and slurries.
  • Operating Pressure: Below 8 bar and above 8 bar.
  • Applications: Process line sampling and top-of-reactor sampling below atmospheric conditions.
  • Operation: Single-handle operation.
  • Configurations: Back purge vacuum (E1), back and needle purge vacuum (E2), back purge venturi (E3), back and needle purge venturi (E4), fixed volume (E5), overflow vacuum (E6), overflow vacuum venturi (E7).
DOPAK S32-G Series Closed Loop Sampling Systems Distributor in India

DOPAK S32-G Series

  • Valve Type: Externally coupled valves, zero dead volume.
  • Sample Type: Gas sampling in cylinders.
  • Operation: Single-handle operation.
  • Configurations: System purge (G1), bypass purge cylinder (G2), process to flare (G3).
DOPAK S32-LG Series Closed Loop Sampling Systems Distributor in India

DOPAK S32-LG Series

  • Valve Type: Externally coupled valves, zero dead volume.
  • Sample Type: Liquefied gases and high-vapour-phase liquids in cylinders.
  • Outage Control: Fixed external outage, with internal and external outage tube options.
  • Safety: Zero quick-connect vapour release.
  • Operation: Single-handle operation.
  • Configurations: System purge (F1), vent to flare (F2), outage tube (F3), purge expansion (F4), bypass purge cylinder (F5), outage tube with bypass purge cylinder (F6), process to flare (F7), system purge with additional safety expansion cylinder (F8).

Order Genuine DOPAK Closed Loop Sampling Systems from
— Priminox Overseas

Share your process conditions, vapour pressure, and sample volume, and we will match you to the right DOPAK series from stock.

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Industries We Supply DOPAK Closed Loop Sampling Systems To

DOPAK closed loop samplers run in process plants where operator safety, environmental compliance, and sample representativity all matter. We supply across the following sectors:

Chemical Processing

Chemical Processing

Petrochemicals

Petrochemicals

Refining

Refining

Oil and Gas

Oil and Gas

Offshore

Offshore

Power Generation

Power Generation

Download DOPAK Catalogue & Get in Touch With Our Team

Access DOPAK product information and connect with our team for technical assistance and stock availability.

DOPAK Catalogue

Download the complete DOPAK product Catalogue with full specifications, dimensions, ordering codes, and material options for all open and closed sampling categories.

DOPAK Product Catalogue
Download DOPAK Catalogue (PDF)

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Need pricing, lead time, or technical assistance? Our team responds within 24 hours.

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DOPAK Closed Loop Sampling Systems: Sourcing and Technical Questions, Answered

  • A DOPAK closed-loop sampling system takes a process sample without exposing the operator to the product or releasing vapour to the atmosphere. The sample flows from the process line, reactor, or tank straight into a sealed bottle or cylinder.

  • The DOPAK series for viscous liquids and slurries is the DPJ and DPT. The DPJ uses piston valves with a purged outlet, and the DPT uses inline valves with a PFA-lined option for corrosive media.

  • Up to 8 bars. For pressures above 8 bar, the DPJ, S23, and S32 series are the correct choice.

  • Use a sample bottle for media with vapour pressure up to 0.7 bar at ambient temperature, and a cylinder for vapour pressures above 0.7 bar. The bottle is sealed with a cap and a septum; the cylinder has needle valves and quick-connect couplings at both ends.

  • Up to 650°C, on the DPJ series. The S23 series also offers a high-temperature variant (D6) for hot process streams.

  • Yes. The DPJ and S32 series cover vacuum and below-atmospheric service, and the S32 is built specifically for top-of-reactor and reactor process line sampling with externally coupled valves.

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