Terminator Yoke Mount General Description

The Terminator valve actuator with Gemini controller is an economical emergency chlorine shutoff system designed for use on chlorine and sulfur dioxide ton containers (one tonne drums) commonly used at water and wastewater treatment plants. The system is DC electric powered with AC only used for keeping battery optimally charged at all times. In the event of a loss of AC power, the system continues to protect for 24 hours. If AC power remains off for an extended period of time, the system will auto-initiate emergency close while sufficient battery power remains..

The Terminator is compatible with standard valves meeting Chlorine Institute specifications and requires no tools or adapters for installation when a CGA820 connection is being used. Adapters are available to allow the Terminator to work alongside most tank mounted vacuum regulators. As a safety device, the Terminator is only powered in the closing direction. After process connections are made, leak tested, and the valve opened, the Terminator is then securely attached to the yoke or valve with a few simple turns of a hand knob.

When the Gemini controller receives an emergency close signal from a gas detector, emergency shutoff switch, or other input, the Terminator is activated and the container valve is rapidly closed. One or two Terminator actuators can be controlled by the Gemini, and systems can be interconnected to protect larger, manifolded banks of chlorine ton containers. The Gemini includes a normally open, low voltage, momentary contact relay output for remote indication of emer-gency close activation. An optional Relay Interface Module (RIM) adds three dry contact relay outputs rated for 5 A @ 250 V with N.O./N.C. and latching capability.


  • Economical, low cost solution.
  • Protects personnel and community by quickly and automatically stopping a gas leak.
  • Easy-to-use clamp mount design for ton containers.
  • Battery powered system – continues to protect for up to 5 days if AC power lost.
  • Fire code approved for many applications as scrubber alternative.
  • Helps comply with RMP gas leak mitigation requirement.
  • Compatible with most tank mounted vacuum regulators.

Terminator Yoke Mount Technical Specs

Enclosure :XENOY™, NEMA 4X
Drive Shaft :440C Stainless Steel
Drive Bushing :XYLAN® Aluminum-Silicon Bronze
Cable :15 ft (4.5m), 2 Wire
Closing Torque :40 ft-lbs
Charging Current @ 110/220VAC :0.9A MAX
Charging Current @ 12VDC (Solar) :.34A MAX
Battery Type :12VDC, 8.0 Amp-Hour, High Rate
Standby/Backup Time :Up to 5 days
Standard Compatibility :Chlorine Institute DWG’s 110, 113
Yoke Compatibility :Chlorine Institute DWG’s 189, 131


Terminator Yoke Mount Options/Accessories

4500.05 :Relay Interface Module – 5A, 250VAC Dry Contact
4500.06-A :Manual Relay Reset Button (requires Relay Interface Module, P/N 4500.05)
5151.00 :Open Style Yoke
6888.00 :Yoke to Pigtail Adapter
2192.07-A :Clamp Extensions
2202.00 :Auxiliary Valve Adapter
2196.00 :Additional Actuator Storage Bracket


Eclipse Actuator

The Eclipse™ emergency valve actuator automatically closes chlorine or sulfur dioxide ton container and 150 lb cylinder valves in the event of a system leak or emergency.

Junction Box

Junction Box for extending actuator cable lengths. NEMA 4X/UL listed, color coded screw terminal connectors for joining actuator cables to conduit wires.

Chlorine Ton Container Adapter

Chlorine Ton Container Adapter. Allows Eclipse and Terminator valve actuators to be used with vacuum regulators that require adapters.

VR Extension

VR Extension for Direct Mount Vacuum Regulators. Allows both the Eclipse actuator and the vacuum regulator to be mount-ed to the same ton container valve.