Jacketed insulation stop valve
I. Introduction:
The BJ45W jacketed insulated gate valve is a force-sealed valve. Therefore, when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the frictional force between the valve stem and the packing, and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be large; otherwise, the fault of the valve stem bending will occur. In recent years, since the self-sealing valve appeared, the medium flow direction of the gate valve has changed to enter the valve cavity from above the disc. At this time, under the action of medium pressure, this type of valve is also tight. The "Three Modernizations Group" of China's valves once stipulated that the flow direction of gate valves should always be from top to bottom. When the gate valve is opened, when the opening height of the disc reaches 25% to 30% of the nominal diameter, the flow rate reaches the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the gate valve should be determined by the stroke of the disc.
II. Execution Standards:
Design and manufacture in accordance with GB12234-89 GB12234-89
Structural length in accordance with GB12221-89 GB12221-89
Flange dimensions in accordance with JB/T79-94 JB/779-94
Valve inspection and testing in accordance with GB13927
III. Main Performance Specifications:
Model | Nominal Pressure | Test Pressure | Applicable Temperature | Applicable Medium | Jacket Pressure | ||||||
Shell | Seal | ||||||||||
BJ45W-25P | 2.5 | 3.75 | 2.75 | ≤200 | Acetic urea | ≤1.3 | |||||
BJ45W-40P | 4.0 | 6.0 | 4.4 | ||||||||
BJ45W-64P | 6.4 | 9.0 | 6.6 | Acetic urea | |||||||
BJ45W-25P | 2.5 | 3.75 | 2.75 | ||||||||
BJ45W-40P | 4.0 | 6.0 | 4.4 | ||||||||
BJ45W-64P | 6.4 | 9.0 | 6.6 | ||||||||
IV. Main Part Materials:
Part Name | ZG1CR18NI9TI Series | ZGOOCR18NI10 Series | ZG1Cr18Ni12MO2Ti Series | ZGOOCR17NI14MO2 Series | WCB Series |
Valve Body/Valve Cap | ZG1CR18NI9TI | ZGOOCR18NI10 | ZG1Cr18Ni12MO2Ti | ZGOOCR17NI14MO2 | WCB |
Wedge | ZG1CR18NI9TI | ZGOOCR18NI10 | ZG1Cr18Ni12MO2Ti | ZGOOCR17NI14MO2 | 1Cr13 |
Stem | 1CR18NI9TI | 00cr18ni10 | 1CR18NI12MOTI | OOCR17NI14MO | 1Cr13 |
Packing | PTFE Textile | PTFE Textile | PTFE Textile | PTFE Textile | Graphite |
Gasket | 304L+PTFE | 304L+PTFE | 316L+PTFE | 316L+PTFE | Graphite+304 |
Gland Flange | ZG1CR18NI9TI | ZG00CR18ni10 | ZG1Cr18Ni12MO2Ti | ZGOOCR17NI14MO2 | WCB |
Stuffing Ring | 1CR18NI9TI | 00CR18NI10 | 1Cr18NI12MOTI | OOCR17NI14MO | 1Cr13 |
Bolt | 1cr17ni2 | 1CR17NI2 | 1Cr17NI2 | 1Cr17Ni2 | 35CrMoA |
Nut | 1cr18ni9ti | 1CR18NI9TI | 1Cr18NI9ti | 1Cr18NI9ti | 45 |
| Machinery & Equipment/Valves/Globe Valves | |
