ITT SKOTCH TRIFECTA T1005 Manual

Technical Manual No. IOT1000P Effective 8/31/2018
REV LEVEL B
ITT Engineered Valves, LLC
33 CENTERVILLE ROAD
LANCASTER, PA 17603-2064
TEL: [phone]
FAX: [phone]
www.engvalves.com
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
MODEL T1005, T1006, T1007 & T1008
SKOTCHTRIFECTAOIL VALVE SYSTEMS
WARNING
Valves and valve actuators supplied by ITT Engineered Valves, LLC are designed and
manufactured using good workmanship and materials, and they meet the applicable
industry standards. These valves are available with components of various materials, and
they should be used only in services recommended herein or by a company valve engineer.
Misapplication of the product may result in injuries or property damage. A selection of
valve components of the proper material consistent with the particular performance
requirement, is important for proper application.
Examples of the misapplication or misuse of a valve or valve actuator includes use in an
application that exceeds the pressure/temperature rating, or failure to maintain the
equipment as recommended.

Technical Manual No. IOT1000P Effective 8/31/2018
REV LEVEL B
Record of Revisions
Revision Description Date
- First Issue 09/10/99
A Added reference information for T1007 (Fail in Last
Position Fire, Fail Closed Purge) 03/23/04
B Revised Model T1007 to Fail-Closed Non-FM,
Model T1008 as FLFC and manual. 08/31/18

Technical Manual No. IOT1000P Effective 8/31/2018
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TABLE OF CONTENTS
SECTION PAGE
I. Description .................................................................................... 4
II. Operation ....................................................................................... 5
III. Installation ..................................................................................... 7
IV. Maintenance & Disassembly Instructions ..................................... 10
V. Leak Testing .................................................................................. 18
VI. Proof of Closure Switch Testing ................................................... 19
VII. Miscellaneous Instructions for Special Options ............................ 22
VIII. Spare Parts Ordering Information ................................................. 22
IX. Reference Information ................................................................... 22
DRAWINGS
03-001 Valve Assembly - Model T1000 Systems
117479 Valve and Actuator Assembly - Model T1000 Systems
117485 Pneumatic Schematic - Fail in Last Position
117486 Pneumatic Schematic - Fail Closed
119746 Pneumatic Schematic Oil Valve Fail in Last Fire Fail Closed
Purge
60-003 Electrical Schematic - Fail in Last Position
60-004 Electrical Schematic - Fail in Closed Position
119747 Electric Schematic Oil Valve Fail in Last Fire, Fail Closed Purge
60-008 Wiring Diagram - AC Solenoids
60-009 Wiring Diagram - DC Solenoids
116762 Wiring Diagram - GO Switches

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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.

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II. OPERATION
Refer to Purchase Order Specification or solenoid valve assembly nameplate to determine
proper line voltage. Operation is in accordance with reference drawings.
Check specific order options and wiring diagrams (60-008 for AC voltage or 60-009 for
DC voltage) for electrical terminals supplied inside the junction box.
A. Closed: Oil Flow Off, Purge and Atomizing Media Flow Off
In this position the atomizing valve plug is held against the atomizing seat by the
actuator return spring, blocking flow of the atomizing media. The oil valve plug is
held in the oil seat by the oil valve return spring, blocking oil flow. The oil valve
proof of closure (POC) switch is made. The valve closed limit switch is actuated
and the valve open limit switch is deactuated.
Model T1005: Energizing both the fire and purge exhaust solenoids coils moves
the system to the closed position.
Model T1006 & T1007: De-energizing both the fire and purge solenoids
moves the system to the closed position.
Model T1008: Energizing the fire exhaust solenoid coil, and de-energizing the
purge solenoid moves the system to the closed position.
B. Fire: Atomizing Media and Oil Flowing, Purge Off
Pressurizing the Actuator’s Fire cylinder causes the atomizing stem to move
downward towards the oil stem. As the atomizing stem contacts the oil stem, it
forces the oil plug out of its seat ring initiating oil flow while simultaneously
seating in the purge seat. Prior to any oil flowing, the oil valve POC switch
changes contact states. The valve open and close limit switches change states
from the valve closed position (Valve open actuated & valve closed deactuated).
Model T1005, T1008:Energizing the fire solenoid coil moves the system to the
Fire position.
Model T1006, T1007:Energizing the fire solenoid causes the valve to go to the
Fire position.

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Operational Note: While in the Fire position there is an operational advantage in
leaving the Purge solenoid energized while in Fire. In this scenario both actuator
cylinders will be pressurized. Doing so will prevent the valve from traveling back
to the Closed position causing a momentary loss in Purge pressure. This will help
in ensuring the burner flame stays lit as the oil valve closes and the slug of oil
remaining in the down stream piping of the valve is evacuated by the purge
media. Maintaining a constant pressure on this slug of oil will ensure it is burned
completely. If the Purge cylinders were not energized with the Fire cylinders the
atomizing valve would close and then open back up for Purge. This will cause a
momentary drop in atomizing pressure causing the flame to suck back or possibly
extinguish before the remaining slug of oil is evacuated.
C. Purge: Atomizing and Purge Media Flowing, Oil Off
Energizing only the purge solenoid moves the atomizing stem to the purge
position. In this position the atomizing plug is positioned between, but not in
contact with the atomizing and purge seats. Accordingly, the atomizing stem is
not in contact with the oil plug, therefore the oil valve remains in the closed
position. The atomizing media flows from the atomizing inlet to both, the
atomizing and oil outlets, purging or clearing any oil which, remains in the
downstream oil piping. There is no oil flow in the purge position and the oil valve
POC switch is made. Both the valve open and valve closed limit switches are
deactuated.
D. Notes
Some installations may require tip warm up prior to light-off. This can be
accomplished by commanding the valve to "Purge" for a period of time before
commanding to "Fire". Atomizing steam then passes down both atomizing and
fuel lines, warming up the tip in preparation for ignition. Due to the stacked
tandem cylinder design of the actuator, when both "Fire" and "Purge" solenoids
are energized, the "Fire" command will override and the assembly will shift to the
full open or "Fire" position. The Fire Solenoid must be de-energized for the valve
to move to the purge position.

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Assemblies may include a speed control (black in color) which is located between
the Fire solenoid body (red anodize) and the manifold adapter (gold anodize).
This is used to slow opening time of the assembly when moving to the "Fire"
position. It has no impact on closing time. Factory setting prior to shipment is full
open. Speed adjustments are made using a small flat blade screwdriver. The
adjustment screw is located on the top end surface of the plate.
Model T1005: Solenoid operated pilot valves are momentary contact type. As
such, upon loss of pneumatic supply pressure or electrical power,
the system will hold last position for some period of time.
Model T1006 & T1007: Solenoid operated pilot valves are maintained
contact spring return type. As such, upon loss of pneumatic supply
pressure or electrical power, the system will fail in the closed
position.
Model T1008: Fire solenoid operated pilot valves are momentary contact type.
As such, upon loss of pneumatic supply pressure or electrical
power, the system will hold last position for some period of time.
Purge solenoid operated pilot valves are maintained contact spring
return type. As such, upon loss of pneumatic supply pressure or
electrical power, the system will fail in the closed position.
III. INSTALLATION
WARNING
Prior to installation and/or start-up, inlet piping should be verified as
being free of dirt, grit, welding slag, or other particulate contamination.
Failure to do so may result in damage to valve internals.
A. Unpacking
Do not remove protective plugs from valve and solenoid until ready to install. If
plastic protective caps are missing, verify no debris or foreign objects are inside
valve.
Transporting - Use proper hoisting procedures to avoid damage to valve. Do not
lift by conduit, switches, etc.
Purge all air lines prior to connecting solenoids.

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B. Valve Installation
The oil valve installation should be in accordance with standard practices for end
connection selected. Valves with weld end connections are supplied with end
connections of sufficient length to prevent thermal damage to valve internals. As
a safety precaution, methods to thermally block the transfer of heat to the valve
body should be employed during welding. The end connections should not be
modified to a shorter length. The weight of the valve must be properly supported
to prevent excessive piping stresses. The valve may be installed in any position,
but the actuator should be supported when the valve is installed horizontally.
Adequate clearance should be provided for valve maintenance and repair.
CAUTION
Valve must be installed in proper flow direction, per valve
flow tag. Improper installation will result in fuel
contamination of atomizing piping, and improper valve
operation.
CAUTION
Ensure piping upstream of fuel inlet DOES NOT include a
check valve since this will cause h
y
draulic lockin
g
of the oil
valve in the closed position.

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C. Pneumatic/Electrical Hook Up
Electrical power and clean dry air are required to operate the T1000 oil valve
system. Wiring should be in accordance with referenced drawings and all
applicable codes. All wiring connections are on the main terminal board located
inside the Junction Box. Supply air is to be connected to Solenoid Assembly
manifold block (See Drawings 117485 & 117486). Pneumatic supply air should
be clean, dry and between 70 to 120 PSIG (482.3 - 826.8 KPa) at all times. It is
important for proper valve performance that this pressure is available at the valve
at all times. Historically, many field problems can be associated with inadequate
pneumatic supply requirements or contamination.
Warning
Make certain electrical supply is isolated and tagged out
before proceeding with electrical connections.
Note: Some assemblies may include a preset filter regulator installed in supply
piping.
Use suitable thread sealing compound for pneumatic connection. Do not
use PTFE tape.
The exhaust side of the solenoid should not be restricted, as this will slow
down the closing rate of the valve.

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D. Start-Up
When valve is placed in service, stroke the main stem and oil stem two or three
times (Fire cycles) and then check for packing leaks. If leakage is present, tighten
adjusting nut 1/8 turn, stroke valve several times to ensure proper setting of
packing and recheck. Repeat until leakage is stopped. This should occur before
nut is completely tight. If leakage is present when nut is completely tight, packing
must be replaced and the stem inspected for wear. Refer to instructions in Section
V.
CAUTION
DO NOT OVER-TIGHTEN PACKING. Over-tightened packing
may cause excessive stem friction, inhibiting stem
movement.
IV. MAINTENANCE AND DISASSEMBLY INSTRUCTIONS
A. Maintenance
The Skotch Trifecta Valve Systems requires periodic maintenance and
adjustments in order to function properly. The following is a list of items which,
must be inspected on a regular basis.
1. Testing Oil Valve Seal
Periodic leak testing should be performed per all applicable codes to
verify proper operation of oil valve seal. See Section V for leak testing
procedures.
2. POC Verification
Periodic testing should be performed per all applicable codes to verify
proper operation of the oil valve POC switch. See Section VI for POC
switch setting procedures.