What is a valve maintenance program?
In its simplest form, a preventive maintenance program involves: Locating and mapping all valves in the system. Recording pertinent information. Cleaning out valve boxes or vaults. Operating all valves to ensure they function properly.
How do you maintain valves?
Here are some tips to help you perform some simple but valuable valve maintenance.
- Clean the area. Valve maintenance doesn’t have to be complicated.
- Inspect your equipment. Eye-balling your valves is another free and simple step in valve maintenance.
- Lubricate the valves.
- Wrap Up.
How often should water valves be exercised?
Valves affecting hospitals, schools, and valves on water mains of diameter 16-inches or greater should be given priority, and should be exercised/assessed once per year.
What are the activities of preventive maintenance?
In practice, a preventive maintenance schedule may include things such as cleaning, lubrication, oil changes, adjustments, repairs, inspecting and replacing parts, and partial or complete overhauls that are regularly scheduled.
How do you fix a leaking globe valve?
First shut off the water to the leaking water valve. Next remove the handle from the stem and then loosen and remove the packing nut. Remove the old washer and slide on the new one. Reinstall the packing nut, tighten lightly with a wrench (don’t over tighten at this or any other point) and reattach the handle.
How do you grease a valve?
BEGIN WITH PREPPING THE VALVE AND LOADING THE GUN. Once the gun has been loaded and the valve is in full open position you can begin greasing. Attach the coupler to the valve fitting and then slowly inject the lube sealant directly into the valve. Lube should be injected at a steady pace.
In which of the following component water hammer occur?
Water hammer can occur in any steam or condensate line. The steam system is greatly at risk of water hammer during startup of the steam system when the highest level of condensate is generated during the warm up of the steam line.
What do you need to know about globe valves?
A globe valve is comprised of two halves, separated by an opening with a moveable plug or disc that can be screwed in, or unscrewed to open and close. They’re most commonly used to open, close, or throttle flow in a system.
When to use a globe valve for throttling?
They’re used in severe throttling services, such as in bypass lines around a control valve. When pressure drop is not a concern and throttling is required, this globe valve design is a good solution. The ends of this globe valve are at a 90° angle allowing fluid to flow in a single 90° turn.
How long does it take to change a control valve?
In most cases, this process should only take 20 to 30 minutes—a small price to pay for peace of mind. In case a problem is detected, always have the correct instruction manual for the valve.
Why do I need to maintain my expansion valve?
Maintaining your valve will assure reliability and continuous run for your machines especially in times you really need them to run. You must know how to do proper maintenance of the valves to make it run longer and function properly. Usually, the most common failure of an expansion valve is due to the charge leak.