Stainless steel flange ball valve technical specifications

Introduction editor
The Q41F stainless steel flange ball valve works by rotating the valve stem to make the valve unblocked or occluded. The ball valve switch is light in weight, small in size, can be made into a large diameter, has reliable sealing, simple structure, convenient maintenance, and the sealing surface and the spherical surface are often closed, and is not easily eroded by the medium, and is widely used in various industries.
Advantages: Edit
1. The fluid resistance is small, and its resistance coefficient is equal to the pipe length of the same length.
2. The structure is simple, small in size and light in weight.
3. It is compact and reliable. At present, the sealing surface material of the ball valve is widely used in plastic and has good sealing performance. It has also been widely used in vacuum systems.
4. The operation is convenient, the opening and closing is rapid, and the rotation is 90° from full opening to full closing, which is convenient for long-distance control.
5. The maintenance is convenient, the ball valve has a simple structure, and the sealing ring is generally movable, and the disassembly and replacement are relatively convenient.
6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the medium does not cause erosion of the sealing surface of the valve.
7. Wide range of applications, from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied.
Ball valves have been widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rocket and other departments, as well as people's daily lives.
Manual editing
1. Scope: This manual applies to electric (or pneumatic) ball valves at flanged ends.
2. Composition: It consists of an electric (or pneumatic) actuator (20) and a ball valve body part connected to the bracket (18) and the connecting shaft (17).
3, use restrictions
Temperature and pressure limit editing
1. The nameplate shows the maximum operating pressure allowed for the ball valve at maximum and minimum operating temperatures.
2, using PTFE or RTFE seat and seals, operating temperature should be between -290C and 2000C. Operating temperatures for other types of seats and seals are subject to inspection by the KI facility.
3. The nominal pressure rating (PN) of the valve indicates the maximum working pressure of the valve at normal temperature. (Example: PN4.0, indicating that the maximum operating pressure at operating temperatures of -290C to 380C is 40 Bar (4.0 MPa)).
4. For precautions for electric or pneumatic actuators, refer to their respective instructions.
Installation instructions editing
1) Remove the protective cover on both sides of the flange end and rinse it with the valve fully open.
2) Before installation, the whole machine test should be carried out according to the specified signal (electricity or gas) (to prevent the use of vibration due to transportation). After passing the test, it can be installed on the line (wiring according to the electric actuator circuit diagram).
3) Before installing the pipe, flush and remove the remaining impurities in the pipe (these materials may damage the seat and the ball).
4) During installation, please do not use the actuator part of the valve as a lifting point for lifting to avoid damage to the actuator and accessories. .
5) This type of valve should be installed in the horizontal or vertical direction of the pipe.
6) The pipe near the installation point should not have the phenomenon of drooping or bearing external force. Pipe brackets or supports can be used to eliminate the deviation of the pipeline.
7) After connecting with the pipe, cross-tighten the flange connection bolt with the specified torque.
Operation and use of editors
1) Confirm that the pipeline and valve have been flushed before operation.
2), the operation of the valve according to the size of the input signal of the actuator to drive the valve stem to complete: when the forward rotation of 1/4 turn (900), the valve is closed. The valve opens when the 1/4 turn (900) is rotated in the opposite direction.
3) When the actuator direction indicator arrow is parallel to the pipeline, the valve is open; when the indicator arrow is perpendicular to the pipeline, the valve is closed.
Maintenance editor
With a long service life and maintenance-free period, it will depend on several factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.
Note: ● When the ball valve is closed, there is still a pressurized fluid inside the valve body.
● Before the repair, release the line pressure and keep the valve in the open position
● Disconnect power or air supply before maintenance
● Before the maintenance, the actuator is separated from the bracket
Classification and feature editing
The ball valve has an O-type ball valve and a V-type ball valve. O-type ball valve adopts floating structure, the core is precision casting, the surface is hard chrome-plated, the valve seat is made of reinforced PTFE material, the flow port is the same as the pipe diameter, the circulation capacity is great, the flow resistance is very small, no when closed Leakage, generally used as an on-off valve, is especially suitable for high-viscosity, fiber-containing, granular media; V-type ball valve adopts a fixed structure, and a V-shaped slit is formed in the core to achieve proportional adjustment, and the flow characteristics are approximately equal percentage.
According to the different process equipment, pneumatic or electric motor can be selected to form pneumatic ball valve and electric ball valve respectively. The pneumatic ball valve must be equipped with a valve positioner for proportional adjustment. If the electric ball valve is to be adjusted, the electronic electric actuator or servo amplifier must be selected. Wait.
From the material, it can be divided into: carbon steel ball valve, stainless steel 304 ball valve, 316 ball valve and copper ball valve
In application, it can be divided into: high pressure ball valve and low pressure ball valve
High pressure ball valve: Mainly used in oil, natural gas, hydraulic oil, engineering machinery and other industries
Low-pressure ball valve: mainly used in corrosive pipelines such as water!