成人a毛片免费全部播放_国产精品第一区第27页_私密 无码 a字_美女视频黄的免费

永嘉渤工閥門有限公司
  英文版    中文版
Bohai Valve Co., Ltd. Yongjia
Contact: Mr. Wang
Phone 577 -57796661 / 057796662
Fax 577 -67367855
Phone: 13806833242
E-mail: 258193218@qq.com
Address: Industrial Zone Oubei Puxi
NEWS

Dalian cast steel gate valve new field

更新時間:2018.07.20
The valve body and flange plate in current gate valves are forged and then machined and assembled together. The production of valves by forging method consumes much material, heavy weight, time - consuming, power - consuming and high cost. Dalian cast steel gate valves are especially improved for these purposes.
This product relates to a gate valve, cast steel gate valve in particular to a gate valve with a guide structure. Some technical problems are also improved: a gate valve with no bias and no friction between the gate and the seat in the process of gate lifting is provided to extend the service life of the gate valve and ensure the sealing effect of the gate valve.
Some people will ask: dalian cast steel gate valve advantages of what? The most important thing is to ensure that the cover of the gate plate will not contact with the sealing surface of the seat, which will cause friction and wear, ensure the sealing effect of the gate valve, and improve the service life of the gate valve. That's good news for manufacturers, isn't it?
The article comes from: http://www.sz-sport.com
今天是
HOME ABOUT US NEWS PRODUCTS NETWORK ORDER <CONTACT US 中文

Copyright 2013 Bohai Valve Co., Ltd. Yongjia LUOTUO All Right Reserved. Address: Yongjia County, Wenzhou City, Zhejiang Province town of North ICP No.: ICP 12045727 No. -1