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1. Introduction

The AT valve pneumatic actuator is an actuator that converts the input air pressure signal into a 90 degree angle and outputs it in the form of a twisted rectangle. This series of pneumatic actuators is a small and high-performance execution structure, divided into two types: dual pneumatic control and single pneumatic control. When combined with angular stroke control valves, it can be used for regulating and switching situations, as well as for other rotary motion situations.

2. Work technical conditions

1) Working medium

Impurities with particle size less than 30 μ m in dry or lubricated air or non corrosive gas media.

2) Gas source pressure

The pressure of the small gas source is 2.5 bar, and the pressure of the atmospheric source is 8 bar.

3) Medium environmental temperature

Standard:- 20℃~+80℃

Low temperature:- 35℃~+80℃

High temperature:- 15℃~+150℃

4) Travel adjustment

There is an adjustment range of ± 5 ° for positions 0 ° and 90 °.

5) Usage occasions

Indoor or outdoor installation.

3. Structure

AT pneumatic actuator (Figure 5)

1) Indicator

The NAMUR standard indicator facilitates the installation of position switches, locators, and other accessories.

2) Output shaft

Nickel plated alloy steel and high-precision integrated output shaft comply with NAMUR, ISO5211, and DI N3337 standards. We can customize sizes and stainless steel materials according to customer requirements.

3) Cylinder body

ASTM6005 die cast aluminum alloy cylinder body can be coated with hard oxide or epoxy resin (blue, orange, *, etc. can be sprayed according to requirements) PTFE coating or nickel plating meet different requirements.

4) End cap

Die cast aluminum alloy surface metal powder spraying in various colors, PTFE coating or nickel plating treatment.

5) Piston

Double piston rack, made of cast aluminum hard oxidation or cast steel galvanized treatment, with symmetrical installation position, fast operation, and long service life. Simply reversing the piston can change the direction of rotation.

6) Travel adjustment

Two independent stroke adjustment screws can be used for convenient, * * ± 50 adjustment of opening and closing positions.

7) High performance springs

Using materials, coating treatment, and pre press assembly. Has strong corrosion resistance and service life. Capable of safely and easily disassembling single acting actuators, meeting different torque output ranges by changing the number of springs.

8) Bearings and guide plates

By using low friction and long-life composite materials, direct contact between metals is avoided, making maintenance and replacement simple and convenient.

9) Sealing

Use nitrile rubber under normal working conditions, and use fluororubber or silicone rubber at high or low temperatures.

4. Parts and materials

5. Working principle of double acting actuator

A intake port Compressed air overcomes spring force. Push the piston outward, rotate the actuator output shaft counterclockwise (0 ° → 90 °), and exhaust from port B;

The actuator loses air, and the piston moves inward under the action of spring force. The output shaft of the actuator rotates clockwise (90 ° → 0 °), and A port exhausts.

A-port intake, compressed air overcomes spring force Push the piston outward, and the actuator output shaft rotates clockwise (0 ° → 90 °), B exhaust port;

The actuator loses air The piston moves inward under the action of spring force The output shaft of the actuator rotates counterclockwise (90 ° → 0 °), and A port exhausts.

6. Working principle of single acting actuator

AT pneumatic actuator (Figure 8)

CCW：

A port intake, compressed air pushes the piston outward, causing the actuator output shaft to rotate counterclockwise (0 ° → 90 °), B port exhaust.

B port intake, compressed air pushes the piston inward, causing the actuator output shaft to rotate clockwise (90 ° → 0 °), Exhaust from port A.

CW: A port intake, compressed air pushes the piston outward, causing the actuator output shaft to rotate clockwise (0 ° → 90 °), B port exhaust.

B port intake, compressed air pushes the piston inward, causing the actuator output shaft to rotate counterclockwise (90 ° → 0 °), Exhaust from port A.

7. Installation form of single acting actuator spring

In the selection process of single acting actuators, if we can understand the torque distribution of valves during opening, operation, and closing, we can select actuators more economically and reasonably.

8. Installation standards

9. Ordering Model Table

1. Pneumatic head pneumatic actuator standard: Valve double acting pneumatic actuator specifications | AT-32, AT-52, AT-63, AT-75, AT-83, AT-92, AT-105, AT-125, AT-140, AT-160, AT-190, AT-210, AT-240, AT-270, AT-300

2- Pneumatic head pneumatic actuator standard: Valve single acting pneumatic actuator specification| ATSR-32,ATSR-52,ATSR-63,ATSR-75,ATSR-83,ATSR-92,ATSR-105,ATSR-125,ATSR-140,ATSR-160,ATSR-190,ATSR-210,ATSR-240,ATSR-270,ATSR-300

3- Pneumatic head pneumatic actuator standard: Valve double acting pneumatic actuator specification AT-32,AT-52,AT-63,AT-75,AT-88,AT-100,AT-115,AT-125,AT-145,AT-160,AT-100,AT-200,AT-240,AT-270,AT-300,AT-350,AT-400

4- Pneumatic head pneumatic actuator standard: Valve double acting pneumatic actuator specification| ZT050D,ZT063D,ZT075D,ZT088D,ZT100D,ZT125D,ZT145D,ZT160D,ZT180D,ZT200D,ZT240D,ZT270D,ZT300D,ZT350D,ZT400D

5- Pneumatic head - Pneumatic actuator standard: Valve single acting pneumatic actuator specification| ZT050S,ZT063S,ZT075S,ZT088S,ZT100S,ZT125S,ZT145S,ZT160S,ZT180S,ZT200S,ZT240S,ZT270S,ZT300S,ZT350S,ZT400S

6- Pneumatic head - Pneumatic actuator standard: Valve double acting pneumatic actuator specification DR/SC00015，DR/SC00030，DR/SC00060，DR/SC00100，DR/SC00150，DR/SC00220，DR/SC00300，DR/SC00450，DR/SC00600，DR/SC00900，DR/SC01200，DR/SC02000，DR/SC03000，DR/SC05000