Pneumatic actuator selection information

Jiangsu Fushan Valve Co., Ltd

Pneumatic actuator selection information

The AT pneumatic actuator is an actuator that converts the input air pressure signal into 90 degrees and outputs it in a twisted rectangular form. This series of pneumatic actuators is an actuator structure with small appearance and high performance, which is divided into two types: dual pneumatic control type and single pneumatic control type. Combined with angular stroke control valves, they can be used for adjustment and switching occasions, as well as other rotary motion occasions.

Structural characteristics of AT pneumatic actuator

1) The extruded aluminum alloy cylinder body has undergone hard oxidation treatment, with a hard surface texture and strong wear resistance.

2) Compact dual piston gear and rack structure, precise meshing, stable transmission, symmetrical installation position, and constant output torque.

3) The movable parts of the piston, rack, and output shaft are equipped with F4 guide rings to achieve low friction, long life, and avoid metal to metal contact.

4) The cylinder block, end cap, output shaft, spring, fastener, etc. are all subject to anti-corrosion treatment.

5) The spring of a single pneumatic actuator is installed after preloading, allowing for safe and convenient disassembly and assembly.

6) The AT pneumatic actuator can perform two-way stroke adjustment of 0 degrees and 90 degrees plus or minus 5 degrees in both fully open and fully closed positions.

7) The installation and connection dimensions comply with ISO5211, DIN3337, VD1/VDE3845, and NUMAR standards, ensuring interchangeability between pneumatic actuators and facilitating the installation of solenoid valves, limit switches, and other accessories.

8) The installation and connection holes of the output shaft have various shapes (square holes, shaft keyholes, and flat holes) for selection

9) Beautiful and delicate in appearance, light in weight, with a waterproof and sealed structure.

10) There are normal temperature type, high temperature type, and low temperature type. Use nitrile rubber under normal temperature working conditions, and use fluororubber or silicone rubber at high or low temperatures

Technical data description of AT pneumatic actuator

The working medium is dry, clean, and free of corrosive gases

Working air source pressure double acting type: 2-8bar

Single acting type: 4-8 bar

Operating temperature normal temperature type: - 20 ° C~+80 ° C (nitrile rubber O-ring)

High temperature type: - 20 ° C~+160 ° C (fluororubber O-ring)

Low temperature type: - 40 ° C~+80 ° C (silicone rubber O-ring)

Rotation angle standard type: 90 ° ± 5 ° non-standard type 0-180 °

Output torque double acting type: 4~10560N. m Single acting type: 6.9~2688N. m

Interface thread GT52-GT83 G1/2 "GT110-GT350 G1/4"

Anatomical Drawing and Component Material Description of AT Pneumatic Actuator

SN Name Quantity SN Name Quantity SN Name Quantity

1 Housing 1 10 Gasket 1 19 Spring Assembly 5-12

2 Output shaft 1 11 Circlip 1 20 O-ring 2

3 O-ring 1 12 position indicator 1 21 left end cap 1

4 Bearing 1 13 Screw 1 22 Right end cover 1

5 Adjusting cam 1 14 Position indicator 4 23 End cap bolt 8

6 O-ring 1 15 Piston 2 24 O-ring 2

7 Bearing 1 16 Guide bearing 2 25 Gasket 2

8 O-ring 1 17 O-ring 2 26 nut 2

9 Bearing 1 18 Guide ring 2 27 Adjusting bolt 2

AT double acting pneumatic actuator output torque table

Model Working air supply pressure (bar)

2    3    4    5    6    7    8

AT52    8.5    12.7    17    21.2    25.4    29.7    34

AT63    15    22.5    30    37.5    44.9    52.5    60

AT75    25    37.1    49.5    61.9    74.2    86.5    99

AT83    32.5    48.7    65    81.2    97.4    113    130

AT92    46.5    69.8    93    116.3    140    162    186

AT105    69.3    104    138.5    173.2    207.8    242    277

AT125    122.7    184    245.5    306.8    368    430    490.8

AT140    184.7    277    369.5    461.8    554    645    739

AT160    281.5    422    563    704    844    985    1126

AT190    453    680    907    1134    1361    1587    1814

AT210    623    935    1246    1558    1870    2182    2493

AT240    977    1465    1954    2443    2931    3420    3908

AT270    1374    2061    2748    3435    4122    4809    5496

ATS Single Acting Spring Return Pneumatic Actuator Output Torque Table

Installation dimensions of AT (S) pneumatic actuator

Description of capacity, weight, and opening time of AT (S) pneumatic actuator

Model Capacity L-On Off Weight KG Double Single On Time S

AT52    0.1-0.2    1.2-1.3    《0.5

AT63    0.2-0.3    1.9-2.1    《0.7

AT75    0.3-0.5    2.8-3.1    《0.8

AT83    0.5-0.8    3.2-3.7    《1

AT92    0.7-1.1    4.6-5.2    《1.5

AT105    1.2-1.8    6.1-7.1    《1.5

AT125    1.5-2.3    9.5-10.9    《2.5

AT140    2.4-3.8    13.7-15.7    《3.5

AT160    3.1-4.9    20.5-23.6    《4

AT190    4.3-6.9    31.1-35.3    《5

AT210    5.9-9.5    41.8-46.6    《8

AT240    10-15.2    62.4-72.4    《8.5

AT270    14.5-21.4    86.3-98.3    《9.5

Installation, Commissioning and Maintenance Instructions for AT (S) Pneumatic Actuator

1. The AT series pneumatic actuator can be directly connected to the valve, or can be installed and connected to the valve through brackets and connectors.

2. During installation, it is necessary to ensure that the output shaft of the pneumatic actuator is aligned with the valve shaft.

3. Pipe joints and the inside of conduits should be cleaned.

4. Solenoid valves, electrical positioners, electromagnetic converters, air source triplets, and communicators should be installed and debugged in accordance with the instructions.

5. The adjusting bolt at both ends of the pneumatic actuator can slightly adjust the opening angle of the valve. After adjustment, the nut must be tightened.

6. The actuator and valve should be commissioned simultaneously. Pressurize the valve to the rated pressure, ventilate the pneumatic actuator, and observe the valve opening and closing conditions. The valve should rotate flexibly.

7. When installing the pneumatic actuator of the solenoid valve, first use the manual button operation (red button) for commissioning, and then use the power on commissioning

8. The air source should be kept dry and clean, and the air filter used for the actuator should be regularly drained and discharged.

Note: The models selected for pneumatic actuators of 3-inch 150LB ball valve and 6-inch 300LB ball valve are AT125 and AT240, respectively