Hotline:
Nominal diameter: DN50 ~ 1200mm
Nominal pressure: PN10 ~ 160MPa
Working temperature: -29 ℃ ~ + 600 ℃
Main material: carbon steel, stainless steel, alloy
Design and manufacture: GB12234
Structural length: GB12221
Flange Dimensions: GB9113 JB79
pressure temperature: GB9131
Test test: GB / T13927, JB / T9092
First, the national standard gate valve introduction
Purpose
and Features Gate valve is one of the most common opening and closing
valve, the use of the gate up and down work to connect (fully open) and
cut off (fully closed) in the pipeline fluid medium.
1, the fluid resistance is small, the sealing surface by the media erosion and erosion of small (gate opening height high).
2, open a more powerful, good sealing performance, the flow of media is not restricted, not spoiler, not down pressure.
3, the shape is simple, manufacturing technology is good, a wide range of applications.
Pressure test
| Nominal pressure | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| Strength test | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 | 24.0 |
| Water seal test | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 | 18.0 |
| Seal test | 1.8 | 2.8 | 4.4 | 7.04 | 11.0 | 18.0 |
| Gas seal test | 0.4-0.7 | |||||
Second, the main components of GB valve material and performance
| Body cover | Valve stem | Sealing surface | Gasket | filler |
Operating temperature ℃ |
Suitable media |
| WCB | 2Cr13 |
13CrSTL Body Material Nylon |
Reinforced flexible graphite 1Cr13 /flexible graphite 08 mild steel 0Cr18Ni9Ti0Cr17Ni12 Mo2TiXD550F (T) PTFE |
Flexible Graphite Reinforced Flexible Graphite SFB /260SFP /260PTFE |
≤425 |
Water, steam, oil |
| WC1 | 38CrMoA125Cr2MoV | ≤450 | ||||
| WC6 | ≤540 | |||||
| WC9 | ≤570 | |||||
| ZGCr5Mo | ≤540 | |||||
| ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | ≤200 | Sales acid | |||
| ZG1Cr18Ni12Mo2Ti | 1C18Ni12Mo2Ti | ≤200 | Acetic acid |
Third, the main gate size GB
PN1.6MPa specifications of the main dimensions
Pn2.5mpa main dimensions
PN4.0MPa～6.4 MPa main dimensions
PN10.0MPa～16.0MPa(main dimensions)
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