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When is it safe to remove the old packing from a valve that is under pressure?
Wiki User
∙ 9y ago
when it is backseated
Wiki User
∙ 9y ago
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When is it safe to remove the old packing from a valve under pressure?
If you are referring to the stem packing, you should be able to do it with no problem under pressure. Shut the valve off, take off the handle, then the nut with the packing in it, remove the old packing, replace it and reinstall the nut and handle. Open the faucet completely and that should be it.. Some valves use a rubber formed packing instead of the graphite or Teflon rope packing. Generally you can use either in place of the rubber or use a small amount around the stem with the old rubber.
How to repack a globe valve?
The packing is located under the handle there is either a stuffing box or a nut over the valve stem
What is the difference between an air bleed valve and a pressure relief valve on a boiler?
They serve two different purposes. An air bleed valve is used to remove air from the circulation system. A pressure relief valve is designed to automatically open when certain pressure levels are reached.
What is difference between pressure reducing valve and pressure relief valve?
pressure relief valve relief the excess pressure which is developed in the syatem, while pressure reducing valve reduces the pressure and supply it to the system.
what is the basic function of an air valve?
The basic function of an air valve is to control the release of air that is under pressure. Common places where an air valve would be used is on an inflatable tire. It is used to add more tire pressure to the tire.
When is it safe to remove the old packing from a valve under pressure?
If you are referring to the stem packing, you should be able to do it with no problem under pressure. Shut the valve off, take off the handle, then the nut with the packing in it, remove the old packing, replace it and reinstall the nut and handle. Open the faucet completely and that should be it.. Some valves use a rubber formed packing instead of the graphite or Teflon rope packing. Generally you can use either in place of the rubber or use a small amount around the stem with the old rubber.
What is the meaning of valve bridge wall markings?
The bridge wall markings are used to denote the high and low pressure sides of a valve as to protect the valves packing from seeing high pressure.
How to repack a globe valve?
The packing is located under the handle there is either a stuffing box or a nut over the valve stem
What causes a pressure washer to lose pressure?
It depends on how old the pressure washer is. If you have been using it for some time its most likely usage that would cause it to loose pressure. When that happens you can check Valve Kit, Unloader and Packing kit on the pump. That is most likely where your problem. As far as the packing kit, a couple of different things could be causing, for example, if you have the machine on and you don't have the trigger on the gun pressed, the water won't circulate which will damage the packing, or again, usage. As for unloader and valve kits its most likely usage.
How do you remove tire pressure valve caps from Renault Megane expression?
You turn the valve cap anti-clockwise!
How do you change the PCV valve Nissan Quest 94?
I'm not sure. Wondering myself. I think you might need to remove the valve cover to get under it. I'm not sure. Wondering myself. I think you might need to remove the valve cover to get under it. I'm not sure. Wondering myself. I think you might need to remove the valve cover to get under it.
What is the difference between an air bleed valve and a pressure relief valve on a boiler?
They serve two different purposes. An air bleed valve is used to remove air from the circulation system. A pressure relief valve is designed to automatically open when certain pressure levels are reached.
What is a PVC valve?
Positive crankcase ventilation. Uses suction and a one way valve to remove pressure and vapors from the engine.
How do you remove the low pressure valve for recharging air conditioner on a 1999 Ford Expedition?
relieve the pressure off the high pressure side
How do you remove the pressure from the gas line on a 2003 ford expedition?
remove gas cap , then under hood on the fule rail thhre is a small unit that looks like a tire valve cap remove it and press down on stem , where eye protection
Can you replace valve seals on a dodge 360 ram with out removing the heads?
Yes, you remove the rockers, add air pressure in the cylinder through the plug hole and use a valve spring compressor to remove valve spring. You can now change the valve seal.
How do you remove vibration in a 1.5 water pipe having 4bar pressure having automatic inlet valve at the end when this valve is closed huge vibration produced in water line how to remove vibration?
Reduce the closing rate on the valve.
