Dynatorque D-Lock
Valve-locking device
Overview
The Dynatorque D-Lock™ valve-locking device provides a robust lockout solution for automated valves—pneumatic, hydraulic, or electric—that require secure prevention of unintended rotation. Designed for easy installation between the valve and actuator, the device enhances safety and operational control across a wide range of industrial applications.
By simplifying lockout procedures, the device saves valuable maintenance time and supports strict regulatory compliance, translating into fewer incidents, lower maintenance costs, and more efficient, reliable plant operations.
Cutaway views of a Dynatorque D-Lock device.
Applications
- Securing valves in either fully open or fully closed positions
- Protecting torque-seated valves in oil, gas, chemical, power, and water-processing facilities
- Supporting Lockout/Tagout (LOTO)* procedures for maintenance and plant safety
- Ensuring position security for automated process isolation valves
Benefits
- Enhances operational safety by minimizing accidental or unauthorized valve operation
- Ensures precise and repeatable valve positioning, even under vibration or thermal cycling
- Adapts to almost any rotating actuator or valve configuration for universal deployment
- Facilitates quick, secure isolation to reduce maintenance downtime
- Supports safety compliance with clear locking indication and robust construction
Features
- Ability to compensate for hysteresis and machining tolerances
- Engineered specifically for torque-seated valves
- Compatibility with a broad range of actuated rotary valves
- Durable, corrosion-resistant materials suited to harsh or demanding environments
- Clear locking status indication for easy verification
Tech Specs
| Model |
Unit Weight, lbm | Max. Valve Actuator Torque, lbf.in | Gear Ratio | Turns for 90° | Standard Output Bore, in | Standard Key Size, in | Standard Mounting Pattern (Quantity) and Size, in | Standard Mounting Pattern (Bolt Circle Diameter), in |
| 3 |
13.5 | 3,000 | 30:1 | 7.5 | 1.250 | 0.25 × 0.18 | (4) 5/16–18 |
2.756 |
| 12 | 39 | 12,000 | 57:1 | 14.25 | 2.000 | 0.375 × 0.375 |
(4) 1/2–13 |
4.921 |
| 21 | 56 | 21,000 | 44:1 | 11 | 2.500 | 0.500 × 0.500 |
(4) 5/8–11 |
5.512 |
| 36 | 111 | 63,000 | 53:1 | 13.25 | 3.250 | 0.750 × 0.750 |
(8) 5/8–11 |
6.496 |
| 60 | 207 | 140,000 | 60:1 | 15 | 4.000 | 1.000 × 1.000 |
(8) 5/8–11 |
10.000 |
| 260 | 672 | 260,000 | 100:1 | 25 | 6.250 | 1.50 × 1.00 | (8) 1 1/8–7 |
14.016 |
| 500 | 1,425 | 500,000 | 80:1 | 20 | 7.000 | 1.25 × 1.00 | (8) 1 1/4–7 |
19.016 |
Notes
- Mechanical advantage is not required because the valve's lockout position is reached using the powered device. The gears in the Dynatorque D-Lock device move it to the lock position under no-load conditions.
- The device can be operated with a standard 3/4-in socket, box end, or adjustable wrench. (These tools are not supplied as part of this lockout package.)
- The device is not field adjustable. It must be ordered as "lock clockwise" or "lock counterclockwise." Provisions must be made to prevent each component in the valve automation package from rotating independently. All components should be pinned together at assembly to prevent inadvertent rotation.
- If automated valve accessories are installed in corrosive environments, consider using stainless steel drivers instead of standard carbon steel drivers.
