Knife type Gate Valve Stainless Steel
Products Design Features
Flanged ends cast steel gate valve are used to cut or connect the pipe media under nominal pressure between PN1.6-42.0MPa(Cass150~2500)working temperatures ≤ 600in oil industry chemical industry fossil-fired power plants.
The main structure features include:
1.Both design and manufacture are carried out strictly following GB/T12234AP600and AP1602. The products feature a reasonable structure. reliable seal, good performance and nice modeling.
2.Co hard alloy welded sealing surface, which is wearing resistant erosion proof, abrasion proof and long-lived.
3.The surface and the adjusting media of the valve shaft are nitrogenized so that it is erosion and abrasion resistant.
4.PN≥15.0MPa(Class900), the middle cavity usea a self-tightening sealing structure to have the sealing performance reinforced along with the pressure rise so as to ensure the sealing performance.
5.There is no backward sealing structure in the valve, so the sealing id reliable
6.The material of the filling and the flange size can be chosen and matched according to the applications and the requirements of the use's. That can satisfies all kinds of working requirements.
Main Parameter Of The Products
| Serial models | (K)Z43F、(K)Z43W(K)Z43W、(K)Z44F、(K)244W、(K)Z44W(K)Z543F、(K)Z543W、(K)Z543W(K)Z544F(K)Z544W、(K)Z544W(K)Z643F(K)Z643W(K)Z643W(K)Z644F(K)Z644W.(K)Z644W(K)Z943F(K)Z943W(K)Z943W(K)Z944F(K)Z944W(K)Z944W | |||
| Pressure grade range | PN 1.6-15.0MPa | Class 150~900 | ||
| Drift diameter range | DN25~1000 | NPS1”~NPS40” | ||
| Driving manner | Hand wheel driving | Gear driving and electric driving | ||
| Scope of application | Class150-300(PN1.6-4.0) | Class400(PN6.4) | Class600-900(PN10.0-15.0) | Class150-900 |
| NPS1-NPS40(DN25-1000) | NPS1-NPS28(DN25-700) | NPS1-NPS12(DN25-300) | NPS1-NPS40(DN25-1000) | |
Products Performance Specification
Technical Specification
| Structural reference | GB | API | |
| Design standard | JB/T5298 GB/T19672 | API6D ASME B16.34 |
|
| Structural length | Flanged | GB/T 12221 GB/T19672. JB/T5298 |
API6D ASME B16.10 |
| Welded connection | GB/T12221 GB/T19672 | ||
| Flanged ends | GB/T9113 JB/T79 | ASME B16.5 MSS SP44 | |
| Butt-welding ends | GB/T 12224 | ASMEB16.25 | |
| Test & inspection | GB/T13927 JB/T9092 | API6D API598 | |
Note: The sizes of valve connecting flange can be designed according to customer's requirement.
Major Parts Material Form
| Body Bonnet | Disc | Stem | Sealing face |
| Stainless steel,Carbon steel,Gray cast steel | Carbons teal,Stainless steel | Stainless steel | Rubber,F4,Stainless steel,Hard alloy |
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