| Customization: | Available |
|---|---|
| Media: | Oil, Water, Steam, Gas |
| Temperature: | Low Temperature |
|
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I. Definition and structure of forged steel globe valve
Forged steel cut-off valve is a kind of valve used to cut off pipeline conveying medium, which is usually used to control liquid, gas, high temperature, high pressure and corrosive medium. It consists of a valve body, a valve cover, a water stop, and a gasket, wherein the water stop includes a disc, a valve column, a valve seat, etc., and the gasket is used to ensure the sealing performance of the valve.
Second, the working principle of forged steel globe valve
The working principle of forged steel globe valve is to control the movement of water stop parts inside the valve by manual or electric operation, so as to realize the function of cutting off or opening the pipeline fluid. The concrete steps are as follows:
1. Open the valve: by manual or electric operation, control the movement of the water stop inside the valve, so that the disc leaves the valve seat and the medium can pass through the valve smoothly.
2. Close the valve: by manual or electric operation, control the movement of the water stop inside the valve, make the disc contact with the valve seat, and cut off the circulation of pipeline medium.
3. Adjusting the valve: by manual or electric operation, the movement track of the water stop inside the valve is controlled, so as to adjust the flow and pressure of the pipeline medium.
Advantages and application scope of forged steel globe valve
1. High-performance sealing: forged steel globe valves have good sealing performance, which can effectively prevent the leakage of pipeline fluid and improve the safety performance of pipelines.
2. Convenient pipeline cleaning: Because there is a certain distance between the valve seat and the valve of the forged steel globe valve, it can avoid the accumulation of residual liquid in the pipeline and make the cleaning work more convenient and faster.
3. Good operation feel: The forged steel globe valve has smooth operation feel and can meet the needs of different working environments.
Forged steel globe valves are usually used in electric power, petrochemical, chemical, natural gas, water treatment and other industries, with good pressure bearing capacity and durability, and can meet the needs of different media and working environments.
To sum up, the working principle of forged steel globe valve is relatively simple, but its advantages and application range are very wide, which plays an important role in ensuring the safety and circulation of pipeline media.
The small forged steel globe valve is the most widely used valve. It is so popular because the friction between the sealing surfaces during opening and closing is small, it is more durable, the opening height is not large, the manufacturing is easy, and the maintenance is convenient. Forged steel globe valve is suitable for medium and low pressure, and also suitable for high pressure. Its closing principle is that, relying on the pressure of the stem, the sealing surface of the disc and the sealing surface of the valve seat are closely adhered to prevent the circulation of the medium.
The forged steel globe valve only allows the medium to flow in one direction, and it is directional during installation. The structure length of the forging steel globe valve is greater than that of forged steel gate valve, while the fluid resistance is large and the seal reliability is not strong when operating for a long time.
Design/Inspection standards: API 602, ASME B16.34, ASME B16.5, EN ISO 15761, ASME B16.25, ASME B1.20.1, ASME B 16.11.
(1) Efficient packing seal at backseat to ensure no leakage from stem.
(2) Fully guided disc ensures accurate alignment of disc and seat and reduces wear on seating surfaces.
(3) Outside Screw & Yoke construction facilitate stuffing box maintenance.
(4) Metallic ring gasket or spiral wound gasket can be applied to ensure the tight seal of body/bonnet joint.
(5) Versatile styles of discs which can be furnished for different purposes.
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No.
|
PART | MATERIAL |
|
1
|
Body
|
S.S. AISI 304
|
|
2
|
Seat Ring
|
S.S. AISI 304
|
|
3
|
Disc
|
S.S. AISI 304
|
|
4
|
Spindle
|
S.S. AISI 304
|
|
5
|
Gasket
|
Spiral Wound,S.S. filled with Asb.
|
|
6
|
Bonnet
|
S.S. AISI 304
|
|
7
|
Bonnet bolt
|
ASTM A 193 Gr. B7
|
|
8
|
Screw
|
Carbon Steel
|
|
9
|
washer
|
Carbon Steel
|
|
10
|
Gland packing
|
Grafoil
|
|
11
|
Gland
|
S.S. AISI 304
|
|
12
|
Gland plate
|
S.S. AISI 304
|
|
13
|
Eye bolt & nut
|
Carbon Steel
|
|
14
|
Yoke nut
|
NI - Resists
|
|
15
|
Hand Wheel | Malleable Iron / Cast Iron |
|
16
|
H. W. Washer | Carbon Steel |
|
17
|
H. Wheel Nut | Carbon Steel |
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