NKZ41H Bw/Flanged Vacuum Isolation Gate Valve
Product Description
NKZ41H BW/FLANGED VACUUM ISOLATION GATE VALVE
NKZ61H Power Plant Steam Turbine Butt Welded Vacuum Gate Valve Description:
The valve body adopts traditional exterior design, reasonable design, good valve rigidity, smooth channel, and small flow resistance coefficient.
The sealing surface is made of stainless steel and hard alloy and has a long service life.
Filler with flexible PTFE, reliable sealing, light and flexible operation. .
The internal and external surfaces of the carbon steel valve are treated with corrosion protection.
Widely used in petrochemical, thermal power plants and other oil products, steam pipe online.
The vacuum gate valve is improved by ordinary manual gate valve. The difference is that the vacuum gate valve is equipped with a vacuum seal ring at the filling seal, which has self-expanding compaction effect. Better sealing performance than ordinary gate valves. The opening and closing part of the vacuum gate valve is a gate plate. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and it cannot be adjusted or throttled. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valves form wedges, and the wedge angle varies with the valve parameters, typically 5°, and 2°52′ when the medium temperature is not high. When the vacuum gate valve is closed, the sealing surface can only be sealed by means of the medium pressure, ie, the seal surface of the gate plate is pressed against the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface. This is self-sealing. Most of the gate valves are forcibly sealed, that is, when the valve is closed, it is necessary to force the gate plate against the valve seat by external force to ensure the sealing of the sealing surface. The gate of the vacuum gate valve makes a linear movement with the valve stem and is called a lifting rod gate valve (also called a bright rod gate valve). Trapezoidal threads are usually formed on the lifting rods. The nut on the top of the valve and the guide groove on the valve body convert the rotation into linear motion, that is, the operating torque becomes the operating thrust. When the valve is opened, when the lifting height of the gate is equal to 1:1 of the valve diameter, the channel of the fluid is completely open, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a mark, that is, a position that does not move, as its fully open position. To account for temperature changes in the phenomenon of lock-up, usually in the open to the top position, and then back 1/2 - 1 lap, as a fully open valve position.
Application
NKZ41H BW/FLANGED VACUUM ISOLATION GATE VALVE
The use of NKZ61H Power Plant Steam Turbine Butt Welded Vacuum Gate Valve:
The valve is suitable for operating temperature ≤ 425 °C (chrome molybdenum steel ≤ 550 °C), the working medium for water, steam or air pipeline, as the opening and closing device; especially suitable for thermal power plant steam turbine condensation and vacuum negative pressure system, from Vacuum isolation seal effect.
Installation Instructions
NKZ41H BW/FLANGED VACUUM ISOLATION GATE VALVE
NKZ61H Power Plant Steam Turbine Butt Welded Vacuum Gate Valve Installation and Use
1.Before installation, check the inside of the valve cavity and the sealing surface, and do not allow any dirt or sand particles to adhere; 2.Where the bolts of each connection site require uniform tightening; 3.Check the packing site requirements for compaction to ensure the tightness of the packing. It is also necessary to ensure that the gate is flexible; 4. Before the valve is installed, the user must check the valve model, the connection size and the flow direction of the medium to ensure consistency with the valve requirements. 5. The user must reserve the valve driver when installing the valve. Necessary space; 6. The wiring of the driving device must be carried out according to the circuit diagram; 7. The valve must be maintained regularly, and it must not be crushed and squeezed freely so as not to affect the sealing.
Product Details
| PARTS NAME |
BODY/BONNET |
STEM |
WEDGE |
SEAT |
STEM NUT |
PACKING |
NKZ64H
NKZ61H-C
NKZ964H-C
NKZ961H |
WCB |
2Crl3 |
25 |
H:ALLOY STEEL |
BRONZE |
GRAPHITE |
NKZ64
NKZ61Y-I
NKZ964-I
NKZ961 |
ALLOY STEEL |
20CrlMo1VA
38CrMoAlA |
ALLOY STEEL |
Y:ALLOY STEEL |
NKZ61W(Y)
NKZ64W(Y)-P
NKZ964W(Y)-P
NKZ961W(Y) |
CF8 |
F304 |
CF8 |
H:ALLOY STEEL |
Product Parameters
NKZ41H BW/FLANGED VACUUM ISOLATION GATE VALVE
| Valve brand |
GOOLE |
| Product Name |
Vacuum Gate Valve |
| Product Model |
NKZ41H NKZ44H, NKZ61H |
| Product caliber |
DN50~DN800 |
| Product pressure |
1.0-10.0Mpa |
| Product material |
cast steel, stainless steel, alloy steel, etc. |
| Drive mode |
manual, electric, pneumatic, gear drive. |
NKZ41H BW/FLANGED VACUUM ISOLATION GATE VALVE
PN/MPa |
Test Pressure/MPa |
| Shell Test |
Upper Sealing |
Seat |
| 1.0 |
1.5 |
1.1 |
1.1 |
| 1.6 |
2.4 |
1.8 |
1.8 |
| 2.5 |
3.8 |
2.8 |
2.8 |
| 4.0 |
6.0 |
4.4 |
4.4 |
| 6.4 |
8.6 |
7.0 |
7.0 |
| 10.0 |
15.0 |
11.0 |
11.0 |
NKZ61H (NKZ41H)Vacuum Flange Gate Valve
| Model |
Medium |
Applicable Temp./ºC |
NKZ61H
NKZ64H
NKZ964H-C
NKZ961H |
Water, Steam, Air |
≤425 |
NKZ61H(Y)
NKZ64H(Y)-I
NKZ964H(Y)-I
NKZ961H(Y) |
Water, Steam, Air |
≤550 |
NKZ61W(Y)
NKZ64W(Y)-P
NKZ964W(Y)-P
NKZ961W(Y) |
Corrosive Medium |
≤200 |
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