The main products are cast iron slurry valve, cast steel knife gate valve, stainless steel knife gate valve, ceramic knife gate valve, polyurethane knife gate valve, fluorine-lined knife gate valve, rubber-lined knife gate valve, double-slide valve, penetrating plate valve, mineral slurry valve, gate Various non-standard customized knife gate valve series products.
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Electro-hydraulic movable knife gate valve
PZ273H, W, Y, TC, X, F, PU
Electro-hydraulic (rising rod) knife gate valve
■ Product overview
The electro-hydraulic movable knife gate valve controls the opening and closing of the valve through the DYT series electro-hydraulic linkage device by pushing up and down. If equipped with a sensor or digital display device, it can be used for long-distance, centralized or program control in high-altitude dangerous areas. The electro-hydraulic valve has large output power, high transmission efficiency, and strong self-locking ability. It can be locked at any position through the control system to adjust flow and other functions.
■ Control instructions
The electro-hydraulic motor should be controlled strictly by referring to the wiring diagram manual to switch the control box. Three-phase 380V (50Hz), 660V (50Hz, 60Hz), 220V (50Hz, 60Hz) and other designated power sources can be selected. When installing, pay attention to the upward direction of the oil filler plug, and refer to the electro-hydraulic manual for operation steps and maintenance.
■ Knife gate valve related parameters
Sealing structure: one-way sealing, two-way sealing
Valve structure: open-plate bright rod, dark-plate bright rod, penetrating type, two-way opening
Support form: triangle type, four-column type, steel plate type, concealed plate type, arch bridge type (unique structure)
Connection form: Wafer, flange
Nominal diameter: DN50~DN3000 NPS 2”~120” (non-standard customized)
Working temperature: ≤1000℃ (The specific temperature resistance depends on the selected material)
Nominal pressure: 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 5K, 10K, 150LB
Actuating mechanism: hand wheel, pneumatic, hand pneumatic, electric, electro-hydraulic, hydraulic, bevel gear, sprocket, lever
■ Knife gate valve seal selection guide
| Seal type | Valve seat material | temperature | Applicable medium and characteristics | Not applicable |
| hard dense seal up |
STL |
≤500 |
The hardness of cemented carbide is 93HRA, which is suitable for various granular medium pipelines, and has strong wear resistance and is not easy to deform. |
硬密封不适用带气体、液体含量介质管道，硬密封泄漏量大密封性差（D级）。不推荐使用在不允许内漏气体、液体等微介质管道及工况。 |
|
TC |
≤300 |
Ceramics have extremely high wear resistance, corrosion resistance and erosion performance, and are suitable for various high-strength particulate media pipelines, such as cinder, coal powder, and high-concentration ore slurry. | ||
|
507 |
≤425 |
The metal seal is suitable for various medium and low-strength media working conditions, such as slag-water mixture, dust, materials, etc. | ||
| soft dense seal up |
NBR |
≤80 |
Nitrile nitrile rubber is suitable for various gas and liquid media pipelines, with good oil resistance and good abrasion resistance. | It is not recommended to be used in pipelines with particles or solid media. The medium can easily damage the worn rubber body. |
|
EPDM |
≤150 |
EPDM rubber is suitable for all kinds of gas and liquid media pipelines, with good acid and alkali resistance and excellent wear resistance. | ||
|
PTFE |
≤200 |
PTFE rubber is suitable for all kinds of gas and liquid media pipelines, with excellent acid and alkali resistance and excellent wear resistance. | ||
|
PU |
≤120 |
Polyurethane has a hardness of 95HRA, has oil resistance, abrasion resistance, and low temperature aging resistance. Its characteristics are extremely abrasion resistant, and it has good resilience and excellent sealing performance. It is suitable for various mixed media pipelines containing gas, liquid and particulate materials, and the mixed use is 100% leaking. | It is not recommended to be used in sanitary media pipelines. | |
■ Selection criteria for knife gate valve
Design and manufacturing standards: JB/T 8691-2013, MSS SP-81
Structure length standard: GB/T 15188.2-1994-J21, MSS SP-81
Flange connection standards: GB/T 79, ASME B16.5, GB/T9113.1-2000
Pressure test standard: JB/T 8691, MSS SP-81
Ram grinding standard: GB/T 1184-1996 (level 12)
Valve seat fine plus standard: GB/T 1184-1996 (level 11)
Valve stem specifications: JB/T 8691-2013
Stud bolt standard: GB899-76
Product identification standard: GB/T12220
Supply standard: JB/T7928
■Knife gate valve material standard
| Selection standard of valve body and parts materials | |||
| Part Name | Material name | Material designation | National Standard Number |
|
Valve body |
Ductile iron |
QT450-10 |
GB/T 12227 |
| Carbon steel |
WCB、A305 |
GB/T 12228、GB/T 12229 |
|
| Austenitic stainless steel |
CF8、CF3、CF8M、CF3M、310S |
GB/T 12230、GB/T 4237 |
|
|
304、304L、316、316L |
ASTM A182:2007、ASTM A240:2007 |
||
|
Valve plate |
Austenitic stainless steel |
304、304L、316、316L |
ASTM A240:2007 |
|
06Cr19Ni10、22Cr19Ni10、06Cr17Ni12Mo2 |
GB/T 4237 |
||
| Stem | Stainless steel round bar |
304、304L、316、316L |
ASTM A479:2008 |
| Bracket | Carbon steel |
WCB |
GB/T 12229 |
|
Q235 |
GB/T 700 |
||
| Stem nut | Copper alloy |
ZcuZn38Mn2Pb2、ZcuSn5Pb5Zn5 |
GB/T 12225 |
| Nickel-containing cast iron |
D-2 |
ASTM A439:83(2009) |
|
| Packing seal | Graphite braided packing |
- |
JB/T7370-1994 |
| Seat seal | PTFE |
- |
HG/T 2903 |
| rubber | Fluorine rubber, nitrile butadiene rubber, EPDM rubber |
- |
|
| Handwheel | Carbon steel |
25、Q235A |
GB/T 699、GB/T 700 |
| Ductile iron |
QT400-15、QT450-15 |
GB/T 12227 |
|
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