The M-TD-11 has 2 sequential keys – one key trapped, one key released (access) – actuator unlocked.
When the actuator is unlocked, the access key can be taken by the operator into the guarded area.
Only when this key is returned to the M-TD-11 can the interlock be re-locked and the first key can be returned to the isolator.
The M-TD-11 Tongue Interlock works on the principle that when the “access” key is “trapped” the actuator cannot be removed and is locked in position.
Only when the “free” key from the Isolator or Key Exchange System is inserted into the second barrel can the “access” key be removed thereby allowing the actuator to be removed.
Only when the isolator key is returned to the Isolator Switch can power then be re-applied to the guarded area.
With a die-cast body with mirror polished finish the M-TD-11 Tongue Interlock is suitable for SIP and CIP cleaning processes with high pressure hosing with detergents at high temperatures.