Blue M industrial and laboratory ovens are available with options to improve the safety of your unit. These options include safety door switches, door locks, circuit breaker lockouts and more. Contact us for more information on any of the safety options listed below.
Safety Door Switch
When this option is included, the oven blower system and heating elements will automatically shut off when the door is opened. This will enable the operator to load or unload the oven without hot air blowing on them.
Pneumatic Door Lock
A pneumatic door lock will be installed to prevent the door from being opened when the oven is running a process cycle. This protects product loads from being damaged due to accidental disruptions in the process occurring when someone opens the door.
Electro-Mechanical Door Lock
An electro-mechanical door lock will be installed to prevent the door from being opened when the oven is running a process cycle. This protects product loads from being damaged due to accidental disruptions in the process occurring when someone opens the door.
Redundant, over-temperature protection (OTP) provides electronic limit control with independent thermocouple sensor, separate heat contactor, and alarm buzzer. Power to air heaters is interrupted, and buzzer sounds when limit temperature is reached.
Note: This functions as a secondary or backup OTP to the main OTP that comes standard with the unit.
Emergency Power Off Pushbutton
A red mushroom head switch provides an easily identifiable method to shut down the heating system and the circulation motor when pressed. The Emergency Power Off Pushbutton must be pulled out to reset the system with all faults cleared.
Circuit Breaker Lockout
A lockable/taggable circuit breaker will be installed. Circuit breaker lockouts keep circuit breakers in the off position to prevent electric shock.
Trace Solvent Package
The trace amount of solvent option can be used to process small amounts of solvent in an oven. This option is only available for ovens with fully welded and sealed liners. Trace solvent ovens are designed so that only the volume of the air inside the chamber is required to dilute the solvent to a mixture that is less than 25% of the LEL level. A warning plate will be affixed to the oven door.
The total quantity of the combustibles in the chamber are such that when mixed with the static air in the oven, the resulting mixture will be well below the lower explosive limit.
Fused Disconnect Switch
Main fused disconnect switch with lock-out may be provided. Flip the disconnect switch to the ON position to provide power to the oven. The location of the switch on the oven will vary.
An MSA Ultima Gas Monitor will be supplied to continuously monitor the concentration of flammable vapors in the chamber. The system is complete with a coalescing filter, filter element, and calibration kit with calibration gas. When a gas monitor is provided, NFPA 86 permits operation with vapor concentrations up to 50 percent of the LFL. Use of a monitor can result in lower operating costs, by reducing the make-up air flow requirement and the associated heater kW.
The gas monitor shall be capable of detecting and responding to process upset conditions to initiate reduction of the vapor concentration before the concentration exceeds 50 percent of the LFL. Should the vapor concentration reach a preset alarm level, the monitor shall de-energize the heating circuits and activate an alarm to notify operators. The process shall be prevented from restarting until the vapor concentration is below the alarm limit and the operator has manually reset the system.