Gate Valve Manufacturer

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 1/2″～60″
End: RF, RTJ, BW,SW,NPT
Pressure rating: Class150～Class2500
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Pressure Seal Gate Valve

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 1/2″～28″
End: RF, RTJ, BW,SW
Pressure rating: Class150～Class2500
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Cryogenic gate valve

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 1/2″～16″
End: RF, RTJ, BW
Pressure rating: Class150～Class1500
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Parallel Gate Valve

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 2″～40″
End: RF, RTJ, BW
Pressure rating: Class150～Class2500
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Bellow Seal Gate Valve

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 1/2″～14″
End: RF, RTJ, BW
Pressure rating: Class150～Class900
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Forged Steel Gate Valve

Body material: Carbon steel, Stainless steel, Alloy steel,ect
Size range(s): 1/2″～12″
End: RF, RTJ, BW
Pressure rating: Class150～Class1500
operation: gearbox, Electric-actuator, Pneumatic- actuator, etc.

Introduction To Gate Valve

The gate valve is a valve that opens by lifting a wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum flow restriction are desired. It is common for water, sewage, steam, oil, and natural gas to be passed through a gate valve.

Gate valve can be divided into wedge disc gate valve and parallel disc gate valve according to sealing surface configuration. Wedge disc gate valve can be divided into rigid gate valve and flexible disc gate valve. Rigid gate valve can be divided into single disc gate valve and double disc gate valve; Parallel disc gate valve can be divided into single disc gate plate and double disc gate plate. According to the thread position of the valve stem, it can be divided into two types: rising stem gate valve and Non rising stem gate valve

Wedge Gate Valve Different Part

1. Operating

Handle Wheel Operated
Gear Worm Operated
Electric Actuator Operated and Pneumatic Operated

2.live load Packing

In Services requiring frequent cycling or with high pressure/temperature variations, live loading extends the service life

3. Outside Screw And Yoke

Outside screw and Yoke gate valve Yoke integral with bonnet for 150lbs-8″ 300lbs -8″ 600lbs-8″ 900lbs-4″ and small size, the other big size Yoke split with the bonnet

4. Bonnet Connect

Pressure Seal Bonnet
Bolt Bonnet
Welding Bonnet

5.End Connections

Raise Flange end
RTJ Flange end
Butt Welding End

6. Yoke Sleeve

large than 150lbs-12″ 300lbs-10″ 600lbs-6″ 900/1500/2500-4″ are regularly provided with roll bearing yokes

7. Packing

Lantern Ring with Leak-off fitting connection and double packing stack is optionally available for critical services

8. Gasket For Body and Bonnet

Flat Face Gasket used in 150LBS valves
Spiral Wound Gasket used in 300LBS and 600LBS valves
Ring Joint used in 900lbs 1500lbs and 2500lbs valves

9. Stem

All Wedge gate valves are provided with an upset forged T-head, and the stem at the stem-wedge connection is stregth-ended, this design also allows the wedge to self-align, eliminating the possibility of bent stem jamming the wedge

10. Wedge

According to the different medium, temperature, and pressure, the wedge has three type:

Flexible Wedge
Solid Wedge
Split Wedge

Gate Valve Material List

gate valve's advantage and disadvantage

Advantages of gate valve:

Low fluid resistance
The torque required for opening and closing is small
It can be used on the loop network pipeline where the medium flows in two directions, that is, the flow direction of the medium is not limited.
when it is fully open, the erosion of the sealing surface by the working medium is smaller than that of the stop valve
The shape structure is relatively simple and the manufacturing process is good
The structure length is relatively short

Disadvantages of gate valve:

The overall dimension and opening height are relatively large, and the installation space is also large
In the process of opening and closing, there is relative friction between the sealing surfaces, which causes great wear and tear, and it is easy to cause Scratch even at high temperature
Generally, the gate valve has two sealing surfaces, which increases some difficulties in processing, grinding and maintenance
Long opening and closing time

播放视频

how is choose the gate valve?

1. Generally, it is only applicable to full opening or full closing, and cannot be used for adjustment and throttling;

2. It is generally used for valves with no strict requirements on the external dimensions and harsh service conditions Occasion. For example, the working medium with high temperature and high pressure requires the closure to ensure long-term sealing, etc;

3. It shall be selected under the working conditions requiring small flow resistance, strong flow capacity, good flow characteristics and strict sealing;

4. Low pressure and large diameter; Such as: water supply project, sewage treatment project

5. When the height is limited, the concealed pole type is used; when the installation height is not limited, the exposed pole type is used;

6. Wedge gate valve should be selected in the case of low opening and closing frequency;

how to differentiate cryogenic gate valve,bellow seal gate valve and high temperature gate valve ?

Low-Temperature Extension

1. The bonnet is extended for low-temperature service, and the packing position is raised to avoid the freeze of packing which will affect packing sealing performance;

2. The gate valve shall have a relief hole in the upstream direction while the pressure may remain in the cavity;

3. Low-temperature cold isolation can be an option to prevent cold heat exchange.

High-Temperature Extension

1. The high-temperature extended structure is mainly to prevent scald operators during
operation.

2. The cooling fin can be selected to help heat radiation.

Bellow Seal Extension

1. Bellow seal extension has the bellow inside of the cavity, the effective compression of the bellows must be greater than the opening stroke of the valve;

2. Bellow seal structure can effectively reduce the leakage of the valve stem, the primary seal is for bellows, and the secondary seal is the packing.

gate valve &ball valve

Why do some pipelines choose gate valves while others choose ball valves?

When the opening and closing frequency is low, gate valve should be selected, otherwise ball valve should be selected
In terms of opening and closing time, some pipelines have requirements for opening and closing time. Ball valves with short requirements should be selected. Ball valves can be opened and closed quickly. The opening and closing time of ball valves with some structures is 0.05s~0.1s
In terms of factory cost, the cost of ball valve is higher than that of gate valve under the same pressure condition with specifications above DN200
For the oil and gas transmission main line, if the pipeline needs to be cleaned, the ball valve and gate valve are not applicable
On the oxygen pipeline system of the metallurgical system, the ball valve with strict degreasing treatment should be selected1

Gate Valve Manufacturer

Wedge Gate Valve

Pressure Seal Gate Valve

Cryogenic gate valve

Parallel Gate Valve

Bellow Seal Gate Valve

Forged Steel Gate Valve

Introduction To Gate Valve

wedge disc gate Valve

flat Disc gate valve

Wedge Gate Valve Different Part

1. Operating

2.live load Packing

3. Outside Screw And Yoke

4. Bonnet Connect

5.End Connections

6. Yoke Sleeve

7. Packing

8. Gasket For Body and Bonnet

9. Stem

10. Wedge

Gate Valve Material List

gate valve's advantage and disadvantage

how is choose the gate valve?

how to differentiate cryogenic gate valve,bellow seal gate valve and high temperature gate valve ?

Cryogenic Gate Valve

High Temperature Gate Valve

Bellow Seal Gate Valve

gate valve &ball valve

Gate Valve

Ball Valve

Product list

Home

Contact

ask For a quick Quote