Cable inner end must use steel nut cap. Lead sealing is required for the sealing between the cable inner head and metal sleeve, which has a good sealing property.
电缆内端头应使用钢制封帽，与金属套的密封必须采用铅封，密封性能良好。
2
Featuring streamline shape and filled with lead, the free-fall opening plug can quickly free-fall to the lower sliding sleeve.
重力塞为流线形，内部装有铅，投塞后快速自由下落至下滑套上并形成密封。
3
If the pilot valve spring coupled driven sleeve, inhibited the spring swing to lead more stable valve movement.