ITT
Engineered Valves, LLC
Page 4 of 22
Technical Manual No. IOT1000P Effective 8/31/2018
REV LEVEL B
I. DESCRIPTION
The Model T1005, T1006, T1007 and T1008 Oil Valves are an integral valve system
with all components housed within a single valve body. It is typically used on all oil-fired
burners and igniters where steam or air atomization is required. The Skotch Trifecta's
unique two-stem three-seat design enables it to perform all key functions, including fuel
sequencing, atomization and purging of downstream piping by providing three distinct
valve positions.
1.
Closed - Both oil and atomizing/purge media off
2.
Fire - Both atomizing and oil flowing while purge is off
3.
Purge - Both atomizing and purge media flowing while oil flow is off
The Model T1005 valve system, which is the Fail-in-Last Position model, utilizes a pair
of dual coil momentary contact pilot solenoids for pneumatic operation and requires
compressed air and electric power to open and close. The system fails in the last position
on loss of pneumatic or electric power. It will not hold this position indefinitely if air is
lost.
The Model T1008 valve system is similar to the T1005 above with the Fire mode being
Fail-in-Last Position, however, the Purge mode is Fail Closed.
Due to the Fire failure mode, Model T1005, and T1008 valve systems can never be
Factory Mutual (FM) approved.
The Model T1006 and T1007 valve systems, which are the Fail Closed model, utilizes a
pair of single coil maintain contact spring return pilot solenoids for pneumatic operation
and requires compressed air and electric power to open. The system closes on a loss of
pneumatic or electric power.
Model T1006 valves incorporating specific options may be Factory Mutual approved for
Fuel Oil Safety Shutoff Valves per FM Approval Standard Class 7400. Valves meeting
the requirements of FM are tagged as such.
Model T1007 valves are not Factory Mutual listed with valve configuration.
A single Skotch oil valve is typically installed in place of a multiple valve arrangement.
Consult order specification for detailed specifications of equipment supplied on each
project.
