User's Manual

Introduction to the TTMS System
Seals
Tanker Truck Monitoring System- User’s Guide 4
1.2 Seals
UL recognized for Intrinsic Safety - file number: E256795
The seals are portable, reusable electronic devices installed on each hatch and valve. The seals
perform the following functions:
• Physically secure the access point (hatch or valve)
• Monitor the access point through sensors and generate status information and alarms
corresponding to various programmed conditions
• Store user data for retrieval
Two types of seals are provided in the TTMS: hatch seals and valve seals. The seals differ in
the length of the locking pin and the mounting bracket.
1.2.1.1 Seals for Valves
There are two types of valve seals whose closing mechanism corresponds to different types of
valves:
• Valves that close through a circular CCW (up to 270°) turn of the handle
• Valves that close through a perpendicular pull of the handle – north to south
The following figures show seals assembled on valves with a ‘pull’ closing mechanism
1.2.1.2 Seals for Hatches