Pneumatic remote programmable shut-off valve production

PSAPneumatic remote programmable shut-off valveProduct Description

Due to the particularity of the pressure swing adsorption device, a large number of programmable valves are required to operate frequently. Programmable valves are important components for the pressure swing adsorption device to complete the process, and are also key equipment for the device to achieve normal operation and reliable work. Therefore, the operating indicators and requirements of program-controlled valves are much higher than those of general valves. In addition to good sealing performance and fast opening and closing speed, they must also be able to withstand pressure fluctuations and fatigue resistance under frequent actions. Our company produces professional pressure swing adsorption program control valves. The valve body adopts imported fatigue stress analysis and calculation software from abroad to perform point by point stress analysis and calculation for different nominal pressures (PN1.6-6.3MPa grade and different nominal diameters (DN15-350mm diameter). The design and manufacturing of the valve body are carried out according to the requirements of the adsorption tower.

The spool shaft of this valve is equipped with a sleeve and a travel sleeve. The sleeve and travel sleeve are combined with a sealing ring to form an unloading chamber, which is connected to the balance small hole on the spool shaft. The square of the outer diameter of the travel sleeve and the square of the outer diameter of the stepped small shaft of the spool shaft are equal to the square of the outer diameter of the spool shaft. Thus achieving a balance of all medium pressures acting on the valve. But the disadvantage of this is that the valve stem is relatively long, and due to the holes in both the axial and radial directions, the strength of the valve core shaft is relatively poor. If compressed air is used as the driving force, the strength will not meet the requirements. In addition, due to the requirement that the outer diameter d3 of the valve core shaft is equal to the intermediate diameter d4 of the valve sealing belt, and the outer diameter d3 of the valve core shaft cannot be made very large

Therefore, this fully unloaded high-pressure manual shut-off valve is generally only suitable for high-pressure pipelines with smaller diameters. In addition, due to multiple connections from the handle to the valve core shaft, it is prone to leakage in practice.

■ Product features

1. The valve stem and piston rod are combined into one to ensure vertical alignment; Make valve online maintenance easy and improve maintenance efficiency;

2. The low flow resistance valve body, streamlined flow channel design, precise and detailed casting surface, and specially designed flow guide vanes greatly reduce flow resistance;

3. Adopting the principle of internal balance: using an internal balance structure to counteract the pressure of the medium, the pressure difference is increased, and it has good bidirectional pressure bearing capacity. When the valve is used in both forward and reverse directions, it has the same sealing pair pressure ratio, which increases the service life of the sealing gasket and reduces the actuator, resulting in a reduction in the overall volume of the valve.

4. Intuitive and reliable on-site indication of valve position status, equipped with valve position detection signal device, can achieve remote signal transmission function;

5. Reliable external seal: using hollow V-shaped packing, with good self sealing performance. The filler is made of carbon fiber reinforced polytetrafluoroethylene material, with added anti friction components to improve wear resistance. The packing group has a spring compensation structure, which can automatically compensate for the wear of the packing. After more than 20 years of use, it has been proven that the sealing structure of this packing group is very reliable and has a long service life;

6. Sealing gasket: Use PEEK sealing gasket. It is a polymer material with high hardness, mechanical strength, and good resilience. The use of this sealing gasket greatly improves the lifespan of the valve;

7. Anti erosion structure: There may be a certain amount of impurities in the gas medium in the process pipeline. Under the push of high-speed airflow, these impurities will quickly gather and erode the sealing plate. After a certain period of time, the sealing gasket of a typical valve structure may have some pits, causing internal leakage of the valve. This valve is designed with a sealing plate anti scouring device, which can flush over 95% of the gas onto the anti scouring device and provide a certain guiding effect on the gas flow direction to protect the sealing plate. The use of this anti erosion device and sealing plate can effectively ensure that the service life of the sealing plate reaches more than 1 million switches.

■ Performance characteristics

1. Good sealing performance, reaching zero leakage standard;

2. Fast valve opening and closing speed within 3 seconds;

3. Long lifespan, able to withstand frequent switching;

4. Capable of bidirectional pressure resistance and resistance to high-speed airflow erosion;

5. Can be used in harsh environments such as hydrogen, carbon monoxide, which are flammable, explosive, toxic, and dusty;

6. Capable of bidirectional pressure resistance and resistance to high-speed airflow erosion;

7. Pneumatic switch, with on-site indication of valve position status and switch signal feedback.

Main technical parameters

Main performance parameters

■PSAPneumatic remote programmable shut-off valveMain appearance and connection dimensions

Note: The above parameters are based on PN1.6MPa. For other pressure levels, please consult the company's technical department. The dimensions in the table do not include standard attachment data. Additionally, due to product improvement and technological innovation parameters, there may be some changes. Please consult the company's technical department for new data.

Product application:

The valve stem and piston rod of the pneumatic program-controlled globe valve are combined into one to ensure vertical neutrality; Make valve online maintenance easy and improve maintenance efficiency. The streamlined flow channel design features a low flow resistance valve body, a precise and detailed casting surface, and specially designed flow deflectors, greatly reducing flow resistance. Adopting an internal balance structure to counteract the pressure of the medium, the pressure difference of the valve is increased, and it has good bidirectional pressure bearing capacity.

The pneumatic program-controlled globe valve adopts hollow V-shaped packing, which has good self sealing performance. The filler is made of carbon fiber reinforced polytetrafluoroethylene material, with added anti-wear components to improve wear resistance. The packing group has a spring compensation structure, which can automatically compensate for the wear of the packing. This valve is designed with an anti scouring structure that can allow more than 95% of the gas to flush onto the sealing plate anti scouring device, and provide a certain guiding effect on the gas flow direction to protect the sealing plate.

Pneumatic program-controlled globe valve has a simple and reliable structure, good sealing performance, bidirectional pressure resistance and zero leakage; Short action time, no wear and tear, long sealing life, anti erosion, no impact, and resistant to molecular sieve dust. Widely used in PSA units of petrochemical, steel, and fertilizer enterprises. Can replace similar imported products on the imported equipment.

A program-controlled valve is a shut-off valve driven by pneumatic, hydraulic, or other means. The valve is connected to the DCS distributed control system or PLC to achieve remote control of computer programs. Widely used in pressure swing adsorption gas separation industries such as methanol cracking for hydrogen production, alcohol drying, vinyl chloride concentration and recovery, polycrystalline silicon tail gas recovery, nitrogen production, oxygen production, and carbon dioxide recovery. The program-controlled valve is a key equipment of the pressure swing adsorption device and an important component to ensure the smooth completion of various processes and reliable operation of the system. The main processes of pressure swing adsorption include adsorption, pressure equalization, forward release, reverse release, flushing, etc. The completion of each process is achieved through the opening and closing of a programmable valve for a certain period of time. Therefore, program-controlled valves require a large number of frequent actions, with higher operational requirements and performance than general general-purpose valves. PSA programmable valve for drying vinyl chloride using pressure swing adsorption programmable valve

The programmable valve must meet the following requirements:

1. The sealing performance is reliable and stable, the valve has a long service life, and there is no leakage even after frequent operation and long-term use.

2. The valve disc has the functions of preventing fluid erosion and corrosion resistance.

3. The opening and closing speed is fast, and the opening and closing time is usually less than 2 seconds

4. Reliable stuffing box sealing. PSA program-controlled valve for carbon dioxide recovery in pressure swing adsorption unit

5. Equipped with on-site indication of valve position status and remote transmission of signals

6. The valve can be remotely controlled. Due to the particularity of the PSA plant process, our company has launched a series of specialized programmable valves, which have high automation functions and provide guarantees for the long-term stable and reliable operation of the PSA plant.

7. Easy to maintain. Pressure swing adsorption (PSA) technology is an approximately isothermal physical process that utilizes the different adsorption capacities of different components in a gas medium on an adsorbent to selectively adsorb under certain working conditions. Pressure reduction is used to regenerate the adsorbent; Periodic switching of valves is required during the production process, and with a large number of valves and frequent actions, manual operation is not possible;

What aspects should be paid attention to when installing pneumatic program-controlled globe valves

1. When installing the valve, pay attention to the flow direction of the medium and install it strictly in the direction indicated by the valve flow arrow.

2. Valves can be installed at any position in pipelines, and carbon steel or alloy steel valves can be selected based on the medium and its temperature.

3. J641H pneumatic programmable shut-off valve should be installed vertically as much as possible, with the valve stem facing upwards.

4. Handwheels, handles, and micro motion mechanisms are not allowed for lifting purposes.

Ordering Notice:

1、 ① Product name and model ② Caliber ③ Is there any accessory for us to correctly select for you ④ Operating pressure ⑤ Temperature of the medium used.

2、 If the company's model has already been selected by the design unit, please order directly from our sales department according to the model.

3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our valve company experts will review and control them for you. If you have any questions: Please: We will do our best to provide you with high-quality service. We provide comprehensive and professional "valve system solutions" and are also willing to help users solve problems encountered in production.