Name: ZTECH4 SENTRY
Brand: Flowco

What is the ZTECH4 | SENTRY?

Estis by Flowco ZTECH4 | SENTRY - (compression emissions evacuator) - collects methane and non-methane greenhouse gas emissions from - engine/compressor crankcases and pneumatic devices that are routinely vented to the atmosphere from natural gas compressor packages. These gases are routed to the engine and burned as fuel gas and converted to useful work. In doing so, volatile emissions are no longer released into the environment, but neutralized and released into the environment as inert gas.

Captures methane that would otherwise escape during operations and uses it to power the compressor

Targets compressor fugitive sources such as rod packing and engine crankcase blow‑by.

ZTECH4 | SENTRY underwent third‑party regulatory reviews – the closed‑loop design helps simplify compliance tasks.

Testing shows engine exhaust emissions remain well below federal limits while the technologies are running.

When paired with VAULT, operators can eliminate fugitive methane from the compressor package.

Patented solutions are built to be retrofitted to other brands, not only Estis packages.

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How It Works

Understanding ZTECH4 | SENTRY

Conventional operations allow fugitive methane to escape from the compressor package (including rod packing and crankcase blow‑by). SENTRY evacuates those emissions during runtime and routes the methane back as fuel in a closed‑loop system—aimed at real reductions rather than shifting emissions elsewhere.

The Flowco Advantage: Why Choose ZTECH4 | SENTRY for Methane Abatement?

Proven in Reviews & Testing

Third‑party regulatory reviews and test data indicate engines remain below federal exhaust limits with ZTECH4 technologies operating.

Closed‑loop Simplicity:

The system reduces compliance hassle compared with frequent packing replacements and detailed volume measurements.

System Approach:

Pair with VAULT to address blowdown and achieve a zero‑fugitive‑methane compressor package.

“Our thermography team performed a leak survey a few days ago on a compressor which currently is operating with a new SENTRY system. We could not find any emission points on the unit during operations. This is great validation on the work your team is doing to commercialize closed vent technology for upstream field compression packages.”

Jonathan Poe, Staff Facilities Engineer

Pioneer Resources

We’ve been using Untitled to kick start every new project and can’t imagine working without it.

Candice Wu

Product Manager, Sisyphus

Compliance and Certification

Providing Data to Meet Compliance and Certification

Flowco's vapor recovery solutions are fully compliant with all relevant regulations, including EPA standards. Our systems have undergone rigorous testing and certification processes to ensure they meet the highest industry standards for safety and performance.

Learn More About EPA Compliance ->

“Our thermography team performed a leak survey a few days ago on a compressor which currently is operating with a new SENTRY system. We could not find any emission points on the unit during operations. This is great validation on the work your team is doing to commercialize closed vent technology for upstream field compression packages.”

Jonathan Poe, Staff Facilities

Pioneer Resources

ZTECH4 | SENTRY

What is the ZTECH4 | SENTRY?

Understanding ZTECH4 | SENTRY