av资源网站_超碰一区二区_激情视频免费在线观看_亚洲最大视频网站_草久免费视频_色老久久_日韩第一视频_亚洲激情中文_国产精品成人aaaaa网站_久久精品无码一区二区三区免费

 1, the shell is forged and cast two process options, the appearance of smooth, uniform organization, to meet the high temperature and pressure requirements; depending on user needs can provide a full range of forged steel gate valve; 

 2, matching special materials to ensure that the sealing surface is high Hardness and hardness is poor; precision grinding, smooth as a mirror, wear-resistant corrosion, effectively extending the service life; 

 3, back seal design, effective protection of packing, to prevent dripping; 

 4, high pressure water strength, high pressure gas intensity, Such as multi-channel testing, full control of the quality of pressure parts; 

 5, stem surface precision grinding and hardening treatment, anti-scratch corrosion, effectively reduce the opening and closing torque, easier to operate;  

 6, design, temperature and pressure, non-corrosive, lubrication, the opening and closing reduce friction, to avoid corrosion of the stem surface, thereby dispense leakage; 

 7, bi-directional pressure seal design to meet the demanding requirements of the various special conditions; 

 8 strict hand with research, ensure bilateral sealing surface of the goodness of fit of 90% or more, to achieve bubble-factory seal detection; 

 9, the Z60 series of unique groove design elastic shutter Automatic compensation processing errors, adapt to high temperature conditions to avoid killed; Z62Y series double plate design, the shutter automatic correction processing errors, always maintain the sealing surface 100% goodness of fit, particularly user-friendly site maintenance;  

 10, since the valve cover Tight seal design, the higher the pressure, the more reliable the seal;