Spence Engineering Company Temperature Pilot T14

Under normal conditions, complete dismantling at regular intervals is not recommended. A valve kept relatively free of dirt will function for years with minimum attention.

Inspect for dirt collected at bleedport 4A

Inspect restriction elbow 5A for dirt collection

Warning: Ensure the steam is turned off before starting the procedure.

Steam blowing out around temperature stem at bonnet?

Upload a photo of the defective bellows seal

Enter the part number of the new bellows seal

Set screw and bonnet bolts removed?

Cowl assembly and bonnet removed from body?

Bellows assembly removed from bonnet using 5/8'' deep socket wrench?

New bellows installed following instructions for replacing seat rings?

Bellows stem fits into coupling on temperature stem and set screw tightened?

Warning: Do not loosen the bolts on the diaphragm chamber of the Type T14 Temperature Pilot or attempt to dismantle the thermostat element.

Thermostat bulbs of original and replacement elements cooled below the low end of their temperature range

Temperature adjusting wheel backed off to within a turn or two of the barrel nut

Temperature diaphragm plate remains seated in correct alignment on balls and all compression on bellows stem assembly released

Diaphragm nuts removed and thermostat assembly detached from pilot

Shipping plate detached from replacement thermostat

Cowl assembly does not turn in bonnet when removing diaphragm nuts

Replacement thermostat installed on pilot and shipping plate installed on original thermostat

Sign off on the thermostat replacement

Steel flat bar clamped to the cowl

Pressure plate flush with the diaphragm seat on cowl

Inlet stop valve cracked until steam issues from tee fitting on pilot outlet

Bonnet set screw and stem set screw loosened if pilot is blocked closed by temperature stem

Cowl assembly rotated upward to raise barrel until steam flows

Examine the seat and disc sealing surfaces for nicks or other signs of damage by pipeline debris

If sealing surfaces are damaged, they must be replaced

Upload a photo of the damaged sealing surfaces

Remove the seat ring (15) from the body with a socket wrench

Describe the condition of the body threads

Clean the body threads of old sealing compound using a wire brush

Apply new sealing compound (Copaltite or equal) sparingly to the threads and shoulder of the new seat ring

Let stand until tacky before assembling into the pilot body

Lap sparingly using 500 grit lapping compound and light pressure