What is a Stainless Steel Globe Valve?
Stainless steel globe valve is a type of globe valve that is made of stainless steel. This type of valve is meant for throttling, opening, or closing fluid flow. The stainless steel globe valve manufacturers mostly use stainless steel material to make the body, bonnet, disc, and stem. This helps to make the valve very strong and resistant to impact damage as well as able to withstand high pressure and high temperatures. Other parts of the stainless steel globe valves such as seats can be made of other materials such as plastic and or rubber. Stainless steel globe valves can be either soft seated or metallic seated valves. Metallic seated valves are the ones in which the seat is made of soft material like rubber and or plastic. Metallic seated stainless steel globe valves are the ones in which the seat is made of metallic material like stainless steel. Stainless steel globe valves use linear motion when closing or opening fluid flow. The closing member of a stainless steel globe valve is known as a disc. The disc fits on the seat to block fluid flow when the valve is closed. Stainless steel globe valve manufacturers design these valves to be either manual or automatic.
Structure of Stainless Steel Globe Valve
Stainless steel globe valves are heavy duty, outside screw & yoke type, bolted bonnet, rising stem, and hand wheel. Valves are highly efficient for services requiring frequent operation and throttling. The internal passage within the valve diverts flow through 90° changes of direction resulting in pressure drop and turbulence. The most advanced design features provide the ultimate in dependable, economic flow control. They are available in a wide range of sizes and weights. Globe valves are generally considered where moderate control or regulation of flow is required.
API 602 Forged Globe Valve
A comprehensive range of small forged gates, globe, check, angle, and bellows seal valves with unique design features.
Globe Valve Flow Direction
The most important thing to understand about globe valve direction flow is that they have specific flow directions. Depending on the application, a globe valve will have fluid flow above or below the disc.
Globe Valve Direction Flow Globe valves designed to have the pressure flowing under the disc are used in low-pressure and low-temperature applications such as general plumbing. This type of flow direction lets the disc rotate freely on the valve stem. This allows the disc to fit properly against the seat as the valve closes, which results in less seat leakage
Globe valves can also have pressure flow above the seat when applied as part of high-pressure and high-temperature systems. This type of flow direction helps to prevent the stem from contracting when it cools down and will keep the disc from lifting off the seat.
To determine the globe valve flow direction, simply look at its body. Here, you should find an arrow indicating the valve flow direction.
Features of Stainless Steel Globe Valve
- The stainless steel globe valve structure is simpler than the gate valve, making it easier to manufacture and maintain.
- The sealing surface is not easy to be worn and scratched, and the sealing property is good. There is no relative sliding between the valve flap and the sealing surface of the valve body when opening and closing, so it is not serious for the wear and scratch of the valve, with the features of good sealing performance, and long service life.
- When opening and closing, the valve flap stroke is small, so the globe valve height is smaller than the gate valve, but the structure length is longer than the gate valve.
- The opening and closing torque are a large, laborious, and long time.
- Large fluid resistance. Because of the tortuous medium channel in the valve body, the fluid resistance is large, with huge power consumption.
- Medium flow direction: When the nominal pressure is PN≤16MPa, the flow direction is usually downstream, and the medium flows upward from the valve flap. When the nominal pressure is PN≥20MPa, it is usually counterflow, the medium flows downward from above the valve flap, which increases the sealability. When in use, the medium can only flow in one direction and cannot change the flow direction.
Applications of Stainless Steel Globe Valve
Stainless Steel Globe valves are adequate for all service media. Valves are marked with flow direction since they are recommended to install with flow and pressure under the disc. It can also be installed in reverse conditions depending upon the conditions. The stainless steel globe Valve is generally faster to operate due to less travel. But requires much force to operate compared to Gate valves.
The stem axis of the stainless steel flange globe valve is perpendicular to the seat sealing surface. The valve stem opens or closes at a relatively short stroke, and the J41W globe valve has a very reliable shut-off action, making this valve suitable for use as a medium for shut-off, adjustment, and throttling. Once the J41W series stainless steel globe valve is open, there is no contact between its seat and the disc sealing surface, so its sealing surface is less mechanically worn. Since the valve seat and disc of most globe valves are easier to repair or replace the sealing element, it is not necessary to remove the entire valve from the pipe, which is ideal for the case where the valve and the line are welded together. The flow direction of the medium as it passes through such a valve will change, so the flow resistance of globe valves is higher than other valves.
Ten articles before and after
The differences between forged valves & casted valves – Zeco | API 602 forged valve manufacturer
Brief introduction of forging methods – Zeco | API 602 forged valve manufacturer
The features of forged steel gate valve – Zeco | API 602 forged valve manufacturer
Forged Steel Ball Valve vs Cast Steel Ball Valve – Zeco | API 602 forged valve manufacturer
Brief Introduction of Ball Valve – Zeco | API 602 forged valve manufacturer
Butterfly Valves with Extended Stem – Zeco | API 602 forged valve manufacturer
3-Way & 4-Way Plug Valves – Zeco | API 602 forged valve manufacturer
The Reasons for the Aging of Rubber Seals – Zeco | API 602 forged valve manufacturer
The Advantages of V-type Ball valves – Zeco | API 602 forged valve manufacturer
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