Pneumatic ball valve cylinder structure diagram: angular stroke cylinder, suitable for ball valve, butterfly valve, etc. There are AT cylinder, AW cylinder Ductile Water Supply Manhole Cover
Ductile Water Supply Manhole Cover made of ductile iron to use water supply manhole top and other places, such as road side pavement and so on.
AT cylinder manual:
1. The cylinder body is extruded aluminum alloy, after hard anodizing treatment, the inner surface is hard and the sliding bearing is made of low friction material to avoid direct contact between metals, flexible rotation, low friction coefficient and long service life.
2. Compact double-piston rack-and-pinion structure, constant output torque.
3. The bottom output shaft of the actuator, the assembly hole has a round or double square (in accordance with ISO.5211 standard) users can choose according to need, we can also be customized according to requirements. The top and top holes of the output shaft and the air source holes comply with NAMUR or VDIVDE 3845 standards. 4. According to user needs to provide installation of various devices and configuration interfaces such as solenoid valves, positioners, returners, etc. are in compliance with the VDINDE 3845 standard.
5. The same specifications are double-acting and single-acting (spring return). There are multiple specifications for each form, and there are multiple models for each specification, such as: normally open, normally closed, single electric control, double electric control , Ordinary type, anti-riot type, etc .; the company's products are suitable for a variety of working conditions such as water supply and drainage of pipeline valves, heating, petroleum, chemical, refining, papermaking, power, pharmaceuticals, food processing, ships, coal, building automation, etc. field.
6. The rotation angle of the standard actuator can be adjusted from -5 to +5 from both ends of the cylinder. .
7. AT type uses air pressure 4 ~ 7bar actuator selection and installation: when using pneumatic actuators, first determine the torque of the valve and consider the pipeline medium; water vapor or non-lubricating medium increases the safety value by 25%; non-lubricating dry gas Increase the safety value by 60% for the medium; increase the safety value by 100% for the granular powder medium conveyed by non-lubricating gas; increase the safety value by 20% for the clean, frictionless lubrication medium, and then find the double-acting or single-acting according to the working pressure of the air source Acting torque meter can get accurate actuator model.
The correct installation accuracy of the pneumatic actuator and valve directly affects the safe operation and service life of the actuator. Reasonable installation is that the central axis of the actuator and the valve stem must be coaxial and connected reasonably.
Before the actuator is assembled with the valve, the torque of the valve should be measured and should not exceed the required torque. After assembly, the pneumatic actuator and the valve are tested at the same time, and the valve is pressurized to the rated sealing pressure. The actuator uses the air source pressure of 0.4 ~ 0. TMPa or the air source pressure according to the user's needs. Switch the intake port to observe the opening and closing of the pneumatic valve. There should be no pauses or crawling. The switch should rotate flexibly. Multiple repeated tests should be performed.
Actuator and accessory functions and uses
1. Double-acting pneumatic actuator: two-position control of valve opening and closing.
2. Spring-reset type: The valve automatically opens or closes when the circuit or gas circuit is cut off or malfunctions.
3. Single electric control solenoid valve: when power is supplied, the valve is opened or closed, and when power is off, the valve is closed or opened. (Explosion-proof type available).
4. Double electric control solenoid valve: the valve is opened when one coil is energized, and the valve is closed when the other coil is energized, with memory function (explosion-proof type available)
5. Limit switch echo: remotely transmit the signal of the switch position of the valve (explosion-proof type available).
6, electric positioner: according to the size of the current signal (standard 4-20mA), the valve media flow adjustment control. (Explosion-proof type available).
7. Pneumatic positioner: According to the pressure signal (standard 0. 02-0. 1MPa) the size of the valve media flow control.
8. Electric converter: convert the current signal into air pressure signal and use it with pneumatic positioner. (Explosion-proof type available).
9, Air source treatment triple parts: including air pressure reducing valve, filter, lubricator, to stabilize the air source, clean and moisten moving parts.
Manual operating mechanism: Automatic control can be used for manual operation under abnormal conditions. 
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Manhole cover, ductile manhole cover, ductile iron manhole cover, cast iron manhole.
Runchun Casting (Zhoushan) Co., Ltd. , https://www.en124casting.com