Machine Control Safety Products
Pneumatic Fluid PowerPneumatic controls for machine safety is a focus for Henry M. Wood Company. Our products can be applied to a large variety of machinery used in manufacturing. We have solutions for Lock Out/Tag Out requirements, control reliable valves for critical applications, two hand non-tie down controls, pilot operated check valves and many other safety applications.
Machine Control Safety Products (printer friendly PDF)
Machine Air Supply
- Lockable shut off and exhaust valves to meet OSHA lock out/tag out requirements up to 3" NPT
- Combination soft start/lockable shut off valves
- Control Reliable valves for alternative lock out applications
- Complete air inlet panels with manual lockable shut off valve, filter, regulator, lubricator and solenoid valve for category 1, 2, 3 and 4 applications*
Two Hand Non-Tie Down Controls
- Pneumatic two hand non-tie down controls
- Electronic two hand non-tie down controls built to a variety of OSHA, ANSI, UL, CSA and CE standards
Critical Function Machine Control
- Control Reliable valves for alternative lock out applications requiring category 3 or category 4 control devices*
- Spool and poppet position monitored valves for category 2 applications*
- Mechanical Press clutch/brake control valves
- Pilot-operated check valves
*A proper Risk Assessment will determine what category control device is required.The end user of this equipment has the final responsibility for Risk Assessment:
| Category 1 | Uses standard well-tried industrial grade products with well-tried safety principles. | Components are reliable but may still fail to an unsafe condition with loss of the safety function. |
| Category 2 | Uses single channel monitored components (monitored start up as determined by risk assessment).Checking performed at suitable intervals. | Component failure will be detected; single failure may result in loss of the safety function, as there is no back up. |
| Category 3 | Uses dual channel (redundant) system with periodic checking performed at or before the next demand for the safety function. Some single faults maybe be undetected and an accumulation of faults can lead to a loss of safety. | Loss of the safety function is not allowed with the failure of a single component. Multiple faults can lead to the loss of the safety function, which will be detected by the monitoring system. |
| Category 4 | Uses dual channel (redundant) system with checking performed constantly or at least before each demand for the safety function. | The loss of the safety function is not allowed. A fault will be detected at or before the next demand on the safety system. If this kind of detection is not possible, then the accumulation of the undetected faults will not lead to the loss of faults to the safety system. |
Mead Fluid Dynamics