Maintenance of Gas-Fired Appliances & Service Fuel Delivery Systems Flashcards
(24 cards)
Do not attempt any maintenance or disassembly without first what to the regulator
isolating the regulator from system pressure and relieving all internal pressure from the regulator.
Most larger and more expensive regulators can be inspected and repaired using available OEM rebuild kits supplied by the manufacturer why
This is more cost effective than regulator replacement
Who sets out the time intervals for Regulator maintenance and inspection
customer or manufacturer instructions
What to find maintenance procedures when performing inspections and/or repairs to a regulator.
Manufacturer instructions
Why dont you loosen the diaphragm casing cap screws (key 17 and 19) when the control spring (key 13) has spring force applied to it
To avoid personal injury due to the sudden uncontrolled movement of parts
What should you have before you start to repair a regulator
Service kit with parts and o-rings
Clean and check, operation with the screen flow streamer causes
performance drop
Readjustment is required if regulator is installed
upside down or horizontal.
Ensure to take extra care during aligning of bolt holes why
threads of bolts will damage the diaphragm
when removing from the body or reinstalling in the body what could you damage
the orifice sealing edge
What is the result if you damage the orifice sealing edge
The result could be loss of sealing tightness during lockup
Lever action regulators repair kits do not come with what parts
lever or linkage sets for replacement/repair
If it needs those replace the whole regulator
What should you do to the orings
Replace and lubricate
What should you put on the adjusting screw
anti-seize compound
If installing a control spring of a different set pressure range what do you do
remove the set pressure range on the spring case and indicate the new range.
When tightening bolts what should be done
Make sure to when tightening any bolts to torque them to the correct specifications
Why would their be water in the sensing line
it either has a low spot somewhere in the line or the line was not sloped correctly for draining
A lubricated plug valve generally consists of two metal components
a plug (valve) and a body
Where is the plug in a plug valve
within the body, but without close contact; the grease creates a barrier.
Where do you put the sealant stick
Remove the combination sealant screw and insert the appropriate size/type of sealant into the stem.
How do you connect the sealant gun
Connect the button head coupler over the Zerk sealant fitting on the valve.
If the valve has seized how could you fix it (2)
Use valve purge compound to remove the blockage. Contact the valve manufacturer to purchase the correct valve purge the compound.
Create a dam with plumber’s putty and allow penetrating oil to leak into the valve stem.
Any bearings and any linkage connections should be lubricated, typically with what
a light oil. You may have pump oil
Keep detailed records of maintenance activities these include (2)
including dates and specific tasks performed
