Gate Valve Stem Packing Material

Flexible graphite valve packings hold up best to heat.

Gate valve stem packing material.

You can see the image. This type of valve also known as an insider screw valve. An externally threaded packing sleeve is threaded within the bonnet and has the packing assembly removably connected thereto for movement with the sleeve. They are self lubricating.

As a final step the hand valve is fully shut so there is no way for process liquid to leak out past the bolt threads. Style description size spec sheet. As a minimum stem packing for valves in hydrocarbon or steam service should be suitable for 1000 f 538 c process temperature. From high temperature and pressure steam service to aggressive chemical exposure to fugitive emissions reduction garlock delivers safe reliable and long lasting valve packing solutions.

Premium steam and chemical resistant packing seals. Standard valve packing utility valve packing material specifications steam material specifications end rings john crane s style g58 rings are manufactured by using a high purity flexible graphite yarn that is first braided and then die formed into high density end rings. In this type of valve stem threads are exposed to the flow medium. Materials should be suitable for the fluid service and for the maximum and minimum fluid design temperatures to which these components will be exposed.

Made of gore ptfe these premium seals are soft so they conform to fill irregularities caused by wear in valve stems. The bolt is then screwed in fully pushing the entire quantity of grease into the packing. Palpak eptfe cord valve stem packing. Our valve packing products are designed to meet the stringent challenging needs of refineries chemical processing facilities power generation and more.

If you want your valve packing to last the longest you will use quality materials. The two most common packing materials in use today are teflon ptfe and graphite. Use them in applications involving acids alkalies brines and solvents. A packing assembly is arranged between a gate valve stem connected to an actuator and a bonnet secured to the valve body.