Pneumatic cut-off ball valve manufacturer

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Pneumatic cut-off valve (ball valve) manufacturer, pneumatic cut-off valve (ball valve) picture, pneumatic cut-off valve (ball valve) price

Pneumatic cut-off ball valveIntroduction to the instruction manual:

Pneumatic cut-off ball valveAlso known as pneumatic cut-off valve (ball valve), GT/AT pneumatic control switch+manual mechanism, flange connected floating ball valve, internal design fireproof groove seal is PTFE PTFE seal, if the soft seal is burned out in case of fire, there can also be a hard seal, 16 pressure, through DN100 (national standard), double acting cylinder ventilation switch valve, installation position and pipeline can be installed and used arbitrarily. The ball valve is composed of valve body, hollow sphere/solid sphere optional, PTFE valve seat, valve stem, bearings, etc.

Purpose:

Widely used in petroleum, chemical, food, pharmaceutical, textile, papermaking, hydropower, shipbuilding, metallurgy, gas, water supply and drainage systems. It can be used as a cutting device on pipelines and containers of gases, liquids, slurries, and solid powders with different corrosive and non corrosive pressures. It can achieve on-site and remote operation, as well as individual or centralized control.

Model designation:

Features:

1. Low fluid resistance, ball valve is one of the types of valves with low fluid resistance, even for reduced diameter ball valves, its fluid resistance is quite small.
2. The thrust bearing reduces the friction torque of the valve stem, which can make the valve stem operate smoothly and flexibly for a long time.
3. The valve stem seal is reliable. As the valve stem only rotates without lifting, the packing seal of the valve stem is not easily damaged, and the sealing ability increases with the increase of medium pressure.
4. The valve seat has good sealing performance. The sealing ring made of elastic materials such as polytetrafluoroethylene is easy to seal, and the sealing ability of the ball valve increases with the increase of medium pressure.
5. Due to the good self-lubricating properties of materials such as polytetrafluoroethylene, the friction loss with the ball is small, resulting in a long service life of the ball valve.
6. The bottom mounted valve stem and the protruding step at the head of the valve stem prevent the valve stem from spraying out. In the event of a fire causing damage to the valve stem seal, the protruding step can also form a metal contact with the valve body to ensure the valve stem seal.
7. Anti static function: Install springs between the ball, valve stem, and valve body to dissipate static electricity generated during the switching process.

Working Principle:

The pneumatic control ball valve is equipped with a travel position switch, solenoid valve, pressure reducing valve, and 0.4-0.7MPa gas source to achieve switch operation, and sends two pairs of passive contact signals to indicate the switch of the valve. There are two types of actuators: single acting and double acting. The advantage of single acting type is that once the power source fails, the pneumatic control valve will automatically be in the open or closed position according to the requirements of the control system. Pneumatic control valves are widely used in industrial fields such as chemical, petroleum, textile, power, food and pharmaceutical, refrigeration, aerospace, papermaking, etc. They can not only control gas, liquid, and steam media, but also control sewage and fiber containing substances.

Execution standard:

1. Design and Manufacturing: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357.
2. Flange size: JB/T74～90（JB74～90）、GB9112～9131、HGJ44～76、SH3406、ANSI B16.5、S B2212～2214、NF E29-211、DIN2543。
3. Structural length: GB12221-89, ANSI B16.10, S B2002, NF E29-305, DIN3202.
4. Main test for inspection: JB/T 9092, API 598.

actuator

Series GT type pneumatic actuators, with double acting and single acting (spring reset), gear rack transmission, safe and reliable; The large-diameter valve series AW type pneumatic actuator has a fork type transmission, with a reasonable structure and high output torque, and is available in both double acting and single acting types.
1. The cylinder is made of aluminum material, which is lightweight and aesthetically pleasing.
2. Gear type dual piston, with large output torque and small volume.
3. The rack and pinion connection can adjust the opening angle and rated flow rate.
4. Manual operating mechanisms can be installed at the top and bottom.
5. The actuator can be equipped with live signal feedback indicators and various accessories to achieve automated operation.
6. The IS05211 standard connection provides convenience for the installation and replacement of products.
7. The adjustable screws at both ends provide a ± 4 ° adjustable range for standard products between 0 ° and 90 °. Ensure synchronization accuracy with the valve.

Options for attachments

According to different controls and requirements, the following attachments can be selected:
Cut off accessories: single electric control solenoid valve, dual electric control solenoid valve, position switch feedback device.
Adjustable accessories: electrical locator, pneumatic locator, electrical converter.
Air source processing accessories: air filter pressure reducing valve, air source processing triad.
Manual mechanism: HVSD manual control mechanism

Technical Specifications:

Stress testing:

Overall dimensions:

Outline drawing:

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Preparation before installation:

1. Ensure that the installation position of the pneumatic pipeline ball valve is in a coaxial position, and the two flanges on the pipeline should be kept parallel. Confirm that the pipeline can withstand the weight of the pneumatic pipeline ball valve itself. If it is found that the pipeline cannot withstand the weight of the pneumatic pipeline ball valve, provide corresponding support for the pipeline before installation.
2. Confirm whether there are impurities, welding slag, etc. inside the pipeline, and blow it clean.
3. Check the nameplate of the pneumatic pipeline ball valve and perform multiple fully open and fully closed operations on the pneumatic pipeline ball valve to confirm that the valve can work normally. Then check all details of the valve again to ensure that it is intact and undamaged.
4. Remove the protective covers at both ends of the valve, check if the valve body is clean, and clean the inner cavity of the valve body. As the sealing surface of the pneumatic pipeline ball valve is spherical, even small debris may cause damage to the sealing surface.

Installation:

1. Any section of the pneumatic pipeline ball valve can be installed at the upstream end, and the handle pneumatic pipeline ball valve can be installed at any position in the pipeline. If the pneumatic pipeline ball valve is equipped with an actuator (such as a gearbox or an electric pneumatic actuator), it should be installed vertically with the valve inlet and outlet in a horizontal position.
2. Install a sealing gasket between the flange of the pneumatic pipeline ball valve and the pipeline flange according to the pipeline design requirements.
3. The bolts on the flange need to be tightened symmetrically, gradually, and evenly.
4. If the pneumatic pipeline ball valve adopts pneumatic, electric or other actuators, complete the installation of the air source and power supply according to the instructions.

Inspection after installation:

1. After installation, start the pneumatic pipeline ball valve to open and close several times. The action should be flexible, the force should be uniform, and the pneumatic pipeline ball valve should work normally.
2. According to the pressure design requirements of the pipeline, the sealing performance of the joint surface between the pneumatic pipeline ball valve and the pipeline flange shall be tested after pressurization.