New Scully Vapor Connect™ Kit Incorporates Vapor Coupler Connection to the Tank Truck into the Loading Authorization Permit—Protecting the Environment, Ensuring Compliance, Increasing Operational Safety, and Protecting the Vapor Recovery Investment
WILMINGTON, MA — March 10, 2026 — Scully Signal Company, a leader in hazardous liquid transfer safety, celebrates 90-years of innovation by announcing the launch of the Scully Vapor Connect™ Kit—a self-proving system for monitoring and verifying terminal to tank truck vapor hose or loading-arm connection as part of the loading permit. The result: terminal operators gain the ability to confirm vapor connection before every load, closing a critical gap in environmental protection, operational accountability, and investment security.
The Problem: A Missed Connection with Real Consequences
Connecting the vapor hose is a crucial part of the loading process after connecting the overfill and grounding plug. Yet unlike grounding and overfill protection, vapor hose connection has historically relied on driver compliance alone in certain regions of the world. When the hose is not properly connected or bypassed entirely, vapors generated during fuel loading escape to the atmosphere rather than flowing to the vapor recovery system, undermining both regulatory commitments and capital investments in environmental infrastructure.
Until now, no broadly adopted terminal solution made vapor connection verification a mandatory, tamper-resistant part of the loading process. Scully is changing that.
The Solution: Vapor Connection, Verified.
The Scully Vapor Connect™ Kit centers on the ST-46, a self-proving controller that can function independently or in tandem with existing Scully Overfill and Grounding controllers. The ST-46 incorporates vapor verification status as part of the loading permit so that a tank truck cannot receive a loading authorization until a proper vapor connection is confirmed.
What sets the Vapor Connect™ Kit apart is its engineered resistance to workarounds or “cheating.” An integrated sensor and wiring are internal to the coupler and hose, and the system uses a proprietary signal that cannot be shorted to simulate a proper connection. For terminal operators who have invested in vapor recovery infrastructure, this technology ensures that investment delivers its intended return.
Key Product Features
- Maximum Vapor Capture using closed system design with a poppet coupler adaptor
- Trusted System that is difficult to “cheat” due to an integrated sensor and wiring internal to the coupler and hose, plus a proprietary signal that cannot be “shorted” to pass as a proper connection.
- Provides an Electrical Output to TAS or batch controller as an option to include in the permit logic.
- Best-in-Class Vapor Flow using a high-flow pressure drop vapor coupler, resulting in reduced back pressure in the truck compartments benefiting in lower potential vapor release to the atmosphere.
- No Truck Modifications Required due to its compatibility with standard 4″ vapor adaptors per API RP1004 specification.
Availability
The Scully Vapor Connect Kit is available now. For more information, product specifications, or to speak with a Scully representative, visit https://scully.com/vapor-connect-request/ or contact your local Scully distributor.