What type of shut-off valve is generally used at the outlet of the new hydrogen compressor in hydrogenation units?

Orbital ball valve – it depends on your costs~~~~

Ball valves for pipelines are related to your pressure rating and cost, I think; I recall seeing ball valves and gate valves used for export purposes~~~~

Moderator, why is a track ball valve being used? Can’t we use gate valves? I’ve seen that many hydrogenation units use ball valves; where are they generally used? Why set it?

There are generally two types of track ball valves. Unlike ordinary ball valves in terms of sealing, track ball valves provide better sealing performance for high-pressure media, and they are typically used at outlets of new hydrogen generators and in other high-pressure applications such as those at 7 bar.

Some of their properties have been noted for reference; certain features of these valves are unmatched by gate valves and ordinary ball valves. In high-pressure hydrogen systems, we use track ball valves, as they are safe, provide good sealing, and have a certain check function. 1. Track ball valve. To achieve a frictionless operation, when the valve is opened, the valve stem first rises to separate the valve ball from the valve seat, and then drives the valve ball to rotate into the open position ； When the valve is closed, the valve stem drives the valve ball to rotate without making contact with the valve seat, after which the valve stem descends to press the valve ball tightly against the valve seat. 2. The ball valve uses a ball valve with a fixed pivot structure to ensure rapid operation of the valve, low torque, and easy opening and closing. 3. The valve body is designed with a top-mounted structure, ensuring that the replacement and maintenance of internal components can be carried out online by removing the valve cover, without the need to remove the valve from the pipeline. 4. To ensure that the valve maintains long-term, consistent tight sealing properties. The sealing between the valve ball and the valve seat is not achieved through the pressure of the medium, ensuring that the valve’s sealing performance remains unaffected by fluctuations in medium pressure. 5. The valve ball sealing surface and the valve seat sealing surface feature a friction-free design to ensure a long service life for the valve seal. During the opening and closing of the valve, the sealing surface of the valve ball and the sealing surface of the valve seat remain in contact-free condition throughout the operation, thereby preventing mutual friction from damaging these surfaces and reducing the valve’s sealing performance and service life. 6. The valve seat is inserted into the valve body through mechanical interference cold pressing; welding, threading, or adhesion are not used for its installation. 7. The cut-off ball valve features a seat design that is free from erosion. When the valve is opened and closed, the flow passage of the cut-off valve opens or closes completely in an instant, preventing high-speed fluid from locally eroding the sealing surface of the valve seat during the opening and closing process, thereby further extending the valve’s sealing life. 8. The sealing surface of the valve ball is clad with nickel-based superalloys, Hastelloy, or other alloys; the minimum cladding thickness is 1.5 mm, to ensure the valve’s tightness and a long service life under the most demanding operating conditions. 9. The valve has bidirectional sealing capability and can withstand pressure differences in both directions. 10. The valve stem of the valve forms a continuous electrical path through the stem nut, valve cover, valve body, and ball core, thereby achieving an anti-static effect. 11. To improve the reliability, safety, and sealing performance of the valve and reduce the failure rate, the low-pressure airtightness of the valve is not achieved relying on the valve seat spring. 12. The positions of the valve stem and the valve ball are controlled by the fit between the valve stem guide pins and the valve stem. To ensure the stable operation of the valve, the valve stem guide pins are dual in number, and they can be removed and replaced from the outside. 13. The handwheel or bearing is fixed by compressing it with bolts or nuts; elastic clamps are not used. 14. The installation dimensions of the valve are the same as those of existing valves, ensuring good interchangeability. I posted a picture page of a track ball valve; it was taken when I went out to learn* earlier. You can take a look~~~~

I found this on a forum; my post hasn’t been found yet~~~http://bbs.hcbbs.com/thread-134994-1-1.html Cross-sectional view~~~

http://bbs.hcbbs.com/thread-890124-1-1.html Find the demonstration animation on the forum~~~

Orbit ball valves are particularly suitable for use at the compressor outlet, as they possess the following advantages. 1. Ball valve for track systems: To achieve frictionless operation, when the valve is opened, the valve stem first rises to separate the ball from the seat, and then drives the ball to rotate into the open position ； When the valve is closed, the valve stem drives the valve ball to rotate without making contact with the valve seat, after which the valve stem descends to press the valve ball tightly against the valve seat. 2. The ball valve uses a ball valve with a fixed pivot structure to ensure rapid operation of the valve, low torque, and easy opening and closing. 3. The valve body is designed with a top-mounted structure, ensuring that the replacement and maintenance of internal components can be carried out online by removing the valve cover, without the need to remove the valve from the pipeline. 4. To ensure that the valve maintains long-term, consistent tight sealing properties. The sealing between the valve ball and the valve seat is not achieved through the pressure of the medium, ensuring that the valve’s sealing performance remains unaffected by fluctuations in medium pressure. 5. The valve ball sealing surface and the valve seat sealing surface feature a friction-free design to ensure a long service life for the valve seal. During the opening and closing of the valve, the sealing surface of the valve ball and the sealing surface of the valve seat remain in contact-free condition throughout the operation, thereby preventing mutual friction from damaging these surfaces and reducing the valve’s sealing performance and service life. 6. The valve seat is inserted into the valve body through mechanical interference cold pressing; welding, threading, or adhesion are not used for its installation. 7. The cut-off ball valve features a seat design that is free from erosion. When the valve is opened and closed, the flow passage of the cut-off valve opens or closes completely in an instant, preventing high-speed fluid from locally eroding the sealing surface of the valve seat during the opening and closing process, thereby further extending the valve’s sealing life. 8. The sealing surface of the valve ball is clad with nickel-based superalloys, Hastelloy, or other alloys; the minimum cladding thickness is 1.5 mm, to ensure the valve’s tightness and a long service life under the most demanding operating conditions. 9. The valve has bidirectional sealing capability and can withstand pressure differences in both directions. 10. The fire resistance design of the valves complies with API 6FA and API 607 standards. All valves are fire-safe. ◆. The valve core and valve seat sealing surfaces feature a all-metal sealing structure, which ensures sealing even in the event of a fire, thereby preventing leakage of the medium. ◆. A stainless steel and graphite wound gasket is used at the middle flange, which can meet the fire resistance requirements ； ◆. A flexible graphite gasket is installed at the stuffing box, which can provide sealing functionality when other gaskets become ineffective due to reasons such as fires ； It can meet the fire resistance requirements ； 11. The valve stem of the valve forms a continuous electrical circuit through the stem nut, valve cover, valve body, and ball core, thereby achieving an anti-static effect. 12. To improve the reliability, safety, and sealing performance of the valve and reduce the failure rate, the low-pressure airtightness of the valve is not achieved relying on the valve seat spring. 13. The positions of the valve stem and the valve ball are controlled by the fit between the valve stem guide pins and the valve stem. To ensure the stable operation of the valve, the valve stem guide pins are dual in number, and they can be removed and replaced from the outside. 14. The handwheel or bearing is fixed by compressing it with bolts or nuts; elastic clamps are not used. 15. The installation dimensions of the valve are the same as those of existing valves, ensuring good interchangeability.

The projects we work on generally involve track ball valves for high-pressure hydrogenation; for gasoline hydrogenation and aviation fuel hydrogenation, ordinary gate valves are used