The valve on the domestic water pipe is not tight, as if the valve core has fallen off, and the wrench doesn't respond. This kind of ball valve is broken every 23 years. It's troublesome to find someone to change it every time. Is there a valve without changing the valve core?I see the cut-off valve (heating pipe commonly used as if) can change the spool, above the structure of a circle 6 angle, unscrew it will damage not? If only to destroy a seal, I add a piece of rubber pad is not it?A ball valve cold water (Dan Xiang), a ball valve through hot water (two-way), if you can only change the spool, I want to change the cut-off valve?Valve also has a circle of 6 corners of the structure, seems to be able to unscrew, but the gate valve is easy to wear it?Please expert comments, thank you! StopListen to the last change raft for me master said, the best life expectancy of 2-3 years, I bought the quality is very good.
Ball valve spool can be changed, change the ball as a whole valve, and small floating ball valve is also worth the money. Ball valve sealing material is generally polytetrafluoroethylene (PTFE), applicable temperature of -200~+200 degrees. Everything else is expensive, like PEEK, PCTFE.
Buy a new one directly, this valve is not much money
Ball valve sealing material is generally PTFE, applicable temperature of 150 degrees. Applicable medium is water, air, oil and low temperature steam.General household ball valve can be used in both directions, the cut-off valve can only be used one-way (low into, out), the sealing performance of the globe valve is not good, the flow capacity is not as good as the ball valve.Finally, I suggest you go to buy better quality ball valve use.
Ball valve spool can be changed, but you change the cost of the spool than you buy a new ball valve, the cost is not much cheaper, but also time-consuming and hard to change.The cut-off valve (heating pipe is commonly used as a ring structure) 6 angle is called the packing gland (gate is), is to prevent the valve from the valve stem medium leakage, leakage is usually found with some graphite packing such as high temperature resistant filler, rather than with a rubber pad. (the normal temperature of rubber is below 80 degrees, and three yuan ethylene propylene rubber is only 130 degrees). Stop valves are generally used on steam pipes.
