Features

01. Imported technology, suitable for rotary valves, such as ball valve, butterfly valve, etc. 
02. Applicable medium: Neutral gas with no corrosive effect on the aluminum alloy 
03. Air source pressure: Normal 5～8bar, special 3～5bar
04. Ambient temp.: Normal type -20～80℃ (code: C)
                                high temp. type -20～180℃ (code: G)
                                low temp. type -40～60℃ (code: D)
05. With visual valve position indicator
06. Valve body material: ASTM6005 die casting aluminum alloy 
07. Sealing material: 
      Normal---NBR (code: N)
      special high temp.---VITON (code: V)
      special low temp.---silicone rubber (code: G) or HNBR (code: h)
08. Control mode: QAS---double acting control         
                              QAD---single acting control 
                              QAD, QAS-☆---with positioner (regulating type)
09. Signal output:  QAD, QAS-◆---with limit switch box (also called limit switch, valve position signal output)

Pneumatic Actuator Design Structure

Internal Structure Diagram of Single Acting Actuator

Brief introduction: 
QA series pneumatic actuator is manufactured with multiple modern technology and new material, embodying the characteristics of design 
science, reliable quality, long life and exquisite design. It is widely used as the drive of 90° turn valves, such as ball valve, butterfly valve, 
plug valve, etc.  

1. Indicator:
NAMUR standard indicator is convenient for installing position switch, positioner and other accessories.

2. Output shaft: 
Integrated nickel alloy steel&high accuracy output shaft complieswith NAMUR, ISO5211&DIN3337. Stainless steel body material&
dimension can be customized according to customers´ requirements.

3. Cylinder: 
ASTM6005 die casting aluminum alloy cylinder adopts hard anodi-zed, epoxy resin protective coating (blue spray, orange spray, yellow 
spray, etc.) PTFE coating or nickel plating can meet different requirements.

4. End cap: 
Golden powder coating, PTFE coating or nickel plating is availableon die casting aluminum alloy.

5. High performance spring: 
Adopt outstanding material, coating process&prefabricated configuration, embody stronger corrosion resistant and longer life. 
User can disassemble single acting actuator safely and easily. Changespring quantity to meet different torque output range.

6. Bearing, piston guide plate: 
Adopt low friction, long life composite material, avoid direct contact between metal and metal and make maintenance more convenient.

7. Sealing: 
For normal temp., adopt NBR seal, adopt VITON for high temp. type, adopt silicone rubber or HNBR seal for low temp. type.

8. Piston:
With double piston pinion, adopt cast aluminum hard anodized or cast steel galvanized with symmetrical mounting position, quick ac-tion&long life span. 

9. Travel regulating: 
Two independent travel regulating bolts can adjust open/closed posi-tion in ±5°.

Structure Exploded Diagram of Single Acting Actuator

Note: Double acting actuator without springs (item No.23)

Component and Material Table

Torque Diagram

Connection&Standard

 Operating Schematic Diagram of QAS Double Acting Actuator

Operating Schematic Diagram of QAD Single Acting Actuator

QAD Single Acting Actuator Output Torque Table【the torque in shadow is standard selection as preferred consideration】

Note: The quantity of springs in the table above are total quantity of springs on both sides, with normal configuration=10 pieces.

          Under normal operating conditions, the considered safety coefficient of single acting actuator is 1.3~1.5. Select the

          corresponding actuator when the air supply pressure is 5bar. E.g.: Valve torque =80N·m, safe torque=80×1.3=104N·m,

          air source pressure=5bar, against the single acting torque table, we could figure out the output torque of QAD-125-10:?

          Air travel 0°=172N·m, air travel 90°=112N·m, spring travel 0°=165N·m,spring travel 90°=105N·m, all output torque exceeds

          our requirement, so the smallest  specification is QAD-125-10.          

QAS Double Acting Actuator Output Torque Table 【the torque in shadow is standard selection as preferred consideration】

Note: Under normal operating conditions, the considered safety coefficient of double acting actuator is 1.2~1.3. Select the corresponding

          actuator when the air source pressure is 5bar. E.g.: Valve torque=100N·m, safe torque=100×1.3=130N·m, air source pressure=5bar,

          against the above table, the smallest specification of double acting actuator to be selected is QAS-105.  

External Dimension

Dimension and Connection Data Table

Note: Bottom connection dimension conforms to ISO5211 and DIN3337 standard.

Actuator Air Consumption and Limit Switch Box Configuration 

Actuator Data Table

Notes:  

1. The configuration in the above table is for PN16bar valve with air source pressure of 5bar, for PN25bar actuator should be configured with a one-increment larger size, for PN40bar, a two-increment larger size and so forth.
2. Configuration of three-way L type is the same as two-way, three-way T type is configured with a one-increment larger size.
3. PPL seal, hard seal, F46 lining&PN25bar valve should be configured with a one-increment larger size, PN25bar valve with PPL seal should be configured with a two-increment larger size and so forth.
4. The configuration above is just for reference, the related actuator should be configured according to the actual valve torque.