Product Description
1. AKW Scotch Yoke Pneumatic Actuator Overview
AKW pneumatic actuators are divided into double-acting and single-acting (spring return), two split cylinders, large output torque, flexible and stable action; the piston rod is hard chrome plated, with good anti-abrasiveness; all sliding parts are equipped with oil-free lubricated bearings or guide rings to reduce the friction coefficient and extend the service life.
The C-curve characteristic output torque of AKW pneumatic actuator is more suitable for large-diameter ball valves and butterfly valves. It is widely used in various valves such as regulating valves, ball valves, butterfly valves, gate valves, slurry valves, stop valves, and plug valves. It is an ideal device for realizing remote centralized or individual control of industrial automation pipelines.
2. AKW Scotch Yoke Pneumatic Actuator Standard Parameters
Basic design
Pneumatic double cylinder double piston fork type rotating mechanism
Model AKWxx= double acting
Model AKWxxS= single acting (spring return)
Rotation angle
Double acting=90°
Single acting=90°
Adjustable angle from both ends 5°~+5°
Air source pressure
0.4~0.7Mpa (maximum 1.0Mpa)
Product Parameters
3. AKW Scotch Yoke Pneumatic Actuator Structure
A: Output shaft
The output torque is large, the action is flexible and stable; the piston rod is hard chrome plated, which has good wear resistance; all sliding parts are equipped with oil-free lubricated bearings or guide rings to reduce the friction coefficient and prolong the service life
B: Handle Wheel
When the circuit or gas line is cut off or there is a fault, the valve will automatically close or open by the spring, and the handle can be turned to open or close the valve.
C: Adjustment screws
Two separate adjustment screws on the outer side are more accurate and convenient for the actuator installed on the valve to adjust the open and closed position of the valve. If full stroke adjustment is required, longer adjustment screws are also configured on the two end covers.
D: Cylinder
The cylinder body is made of ductile iron, the inner surface is coated with PTFE, and the inner hole is precisely machined, which has a longer service life and a low friction coefficient.
E: Connection size
Complies with international ISO5211 standards
F: Spring cylinder
When the circuit or gas line is cut off or there is a fault, the valve automatically closes or opens by the spring (it cannot be disassembled without the guidance of professionals)
G: Cast Box
Built by ductile iron
4. AKW Scotch Yoke Pneumatic Actuator Functions and Accessories
Double-acting pneumatic actuator: two-position control of valve opening and closing.
Spring reset type: when the circuit or gas line is cut off or there is a fault, the valve automatically opens or closes.
Single-electric solenoid valve: the valve opens or closes when the power is supplied, and closes or opens when the power is off (explosion-proof type is available).
Double-electric solenoid valve: the valve opens when one coil is energized, and the valve closes when the other coil is energized, with memory function (explosion-proof type is available).
Limit switch feedback device: long-distance transmission of valve switch position signal (explosion-proof type is available).
Electrical positioner: according to the current signal (standard 4~20mA) size, the medium flow of the valve is regulated and controlled. (Explosion-proof type is available).
Pneumatic positioner: according to the air pressure signal (standard 0.02~0.1Mpa) size, the medium flow of the valve is regulated and controlled.
Electrical converter: converts the current signal into an air pressure signal, and is used in conjunction with the pneumatic positioner (explosion-proof type is available).
Air source processing triplex: including air pressure reducing valve, filter, oil mist collector, which can stabilize the air source pressure, clean and lubricate the moving parts.
Manual operation mechanism: automatic control can be operated manually under abnormal conditions.
5. AKW Scotch Yoke Pneumatic Actuator Output Torque
Single Acting Type
| Model |
Air source pressure (Mpa) |
| 0.4 |
0.5 |
0.6 |
0.7 |
| AKW13 |
408 |
510 |
612 |
714 |
| AKW17 |
990 |
1238 |
1485 |
1733 |
| AKW20a |
1248 |
1560 |
1872 |
2184 |
| AKW20 |
1923 |
2404 |
2885 |
3366 |
| AKW25 |
3406 |
4257 |
5108 |
5960 |
| AKW28 |
4616 |
5770 |
6924 |
8078 |
Double Acting Type
| Model |
Spring torque |
Air source pressure Mpa |
| 0.4 |
0.5 |
0.6 |
| Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
| AKW13 |
182 |
324 |
84 |
226 |
186 |
328 |
288 |
430 |
| AKW17s |
526 |
664 |
326 |
464 |
574 |
712 |
822 |
960 |
| AKW20as |
553 |
823 |
425 |
695 |
737 |
1007 |
1049 |
1319 |
| AKW20s |
902 |
1510 |
413 |
1021 |
894 |
1502 |
1375 |
1983 |
| AKW25s |
1534 |
2529 |
877 |
1872 |
1728 |
2723 |
2579 |
3574 |
| AKW28s |
2106 |
3504 |
1076 |
2510 |
2230 |
3664 |
3384 |
4818 |
6. AKW Scotch Yoke Pneumatic Actuator Size and Dimensions
Single Acting Type Double Acting Type
| Single Acting Dimensions |
| Model |
L |
L1 |
L2 |
H |
Rc-g |
m1 |
m2 |
D |
D1 |
n-M |
K |
D2 |
F |
A |
B |
| AKW13S |
870 |
324 |
546 |
185 |
3-1/4" |
88 |
132 |
φ175 |
φ140 |
4-M16 |
φ27 Depth30 |
φ100 |
4 |
30 |
80 |
| AKW17S |
988 |
378 |
610 |
240 |
3-3/8" |
105 |
175 |
φ205 |
φ165 |
4-M20 |
φ36 Depth40 |
Φ120 |
4 |
30 |
130 |
| AKW20aS |
1263 |
378 |
885 |
240 |
3-3/8" |
105 |
175 |
φ205 |
φ165 |
4-M20 |
φ36 Depth40 |
φ120 |
4 |
30 |
130 |
| AKW20S |
1415 |
530 |
885 |
285 |
3-3/8" |
115 |
232 |
φ230 |
φ165 |
4-M20 |
φ46 Depth50 |
Φ130 |
4 |
30 |
130 |
| AKW25S |
1695 |
655 |
1040 |
360 |
3-1/2" |
150 |
278 |
φ300 |
φ254 |
8-M16 |
φ55 Depth60 |
φ200 |
4 |
30 |
130 |
| AKW28S |
1840 |
680 |
1160 |
360 |
3-1/2" |
150 |
300 |
φ350 |
φ298 |
8-M20 |
φ55 Depth60 |
φ230 |
4 |
30 |
130 |
| Double Acting Dimensions |
| Model |
L |
H |
Air Support |
m2 |
D |
D1 |
n-M |
K |
D2 |
A |
B |
| Rc-g |
ml |
| AKW13 |
593 |
185 |
3-1/4" |
88 |
132 |
φ175 |
Φ140 |
4-M16 |
27 Depth 30 |
φ100 4 |
30 |
80 |
| AKW17 |
782 |
240 |
3-3/8" |
105 |
175 |
φ205 |
Φ165 |
4-M20 |
36 Depth 40 |
Φ120 4 |
30 |
130 |
| AKW20a |
888 |
240 |
3-3/8" |
105 |
175 |
φ205 |
φ165 |
4-M20 |
36 Depth 40 |
φ120 4 |
30 |
130 |
| AKW20 |
1098 |
285 |
3-3/8" |
115 |
232 |
φ230 |
φ165 |
4-M20 |
46 Depth 50 |
φ130 4 |
30 |
130 |
| AKW25 |
1309 |
360 |
3-1/2" |
150 |
278 |
φ300 |
Φ254 |
8-M16 |
55 Depth 60 |
φ200 4 |
30 |
130 |
| AKW28 |
1427 |
360 |
3-1/2" |
150 |
300 |
φ350 |
φ298 |
8-M20 |
55 Depth 60 |
φ230 4 |
30 |
130 |
7. AKW Scotch Yoke Pneumatic Actuator Selection and Maintenance
When using AKW pneumatic actuator, first determine the torque of the valve, considering the pipeline medium: for clean, frictionless lubricating media, add 20% safety value, water vapor or non-lubricating media, add 25% safety value, non-lubricating dry gas media, add 60% safety value, non-lubricating gas-transported granular powder media, add 100% safety value.
Then, according to the working pressure of the gas source, find the double-acting or single-acting torque table to get the accurate actuator model.
Whether the pneumatic actuator and valve installation accuracy is correct directly affects the safe operation and service life of the actuator. Reasonable installation is to ensure the coaxiality of the actuator shaft and the valve stem. The valve torque should be measured before the actuator and valve are assembled, and it should not exceed the required torque.
After assembly, the pneumatic actuator and the valve are tested at the same time. The balancing valve is closed (without the manual mechanism, the balancing valve is not provided). The rated sealing pressure of the valve is applied. The actuator switches the two air inlets of the pneumatic actuator with the air source pressure of 0.4~0.7MPa or the air source pressure required by the user. When the air is supplied, the opening and closing of the pneumatic valve should be observed. There should be no pause or creeping phenomenon. The switch should rotate flexibly. Repeated tests should be performed many times. When debugging the pneumatic actuator equipped with a solenoid valve, the manual device (the red button of the solenoid valve) should be used for debugging first, and then the power should be turned on for debugging. When the manual mechanism is used for operation, the air source should be cut off first, and the worm gear of the manual mechanism should be disengaged from the worm gear first, that is, the small handle should be turned to the automatic position.
The pneumatic actuator is a field instrument and should be maintained and serviced regularly. The air source of the actuator should be kept dry and clean, and the air filter used with the actuator should be waterproofed and drained regularly to avoid entering the solenoid valve and the actuator and affecting normal operation. Under normal use, it should be inspected every six months and overhauled once a year.
Manufacturing Process
Applications Display
Certifications
Our Exhibitions
FAQ
Q1: Do you have any standard international certificates?
*We have ISO9001, ISO14000, CE, UL and other certifications. Our products also have sepcial deisgn patents.
Q2: Are there any special certification requirements for this product?
*There are certification requirements for explosion-proof actuators in China. They must have explosion-proof certificates and production licenses issued by the National Explosion-proof Electrical Inspection Center. By 2020, the production license will be cancelled and converted to 3C certification. Coal mine products have mining product safety mark certificates (referred to as coal safety certification) and mining product explosion-proof certificates. This coal mine certification product is our company's advantage product. At present, in the electric actuator industry, only 6 actuator manufacturers in China have such mining valve actuator certificates. Domestic coal mines must have products with this mining safety certificate to be used on pipelines underground in coal mines. Therefore, compared with other ground products, there will be less competition in the coal mine sector. Now the company's export of coal mine products is also rising year by year.
Q3: If this product can be operated using WiFi, are there any anti-theft wall measures?
*AK smart series has GPRS mobile phone card wireless control function, which is a special optional function with name, password and verification code to ensure security. This function is not widely used in China at present. It will be considered in some special areas where control cables cannot be laid but there is a signal network.
Q4: Does the factory have a CO Form E record?
*Yes
Q5: How long is the warranty period for this product?
*One year based on the date of manufacture.
Q6: How to start calculating the warranty period?
* According to the date of manufacture (the year and month of manufacture are on the product nameplate).
Q7: What are the advantages of your company? (Price, special accessories, product quality)
* The company's main products are electric actuators, which are equipped with valve products. Our company was established for 13 years. We founded the (Changneng) brand electric actuators and later founded the (AUKOMA) brand high-end series electric actuators. After more than ten years of market operation, the product quality and market sales are stable, and we have a certain reputation in the domestic industry. Our brand is medium in China, and our product series is relatively comprehensive. We have Z, Q, CND, AK series products that can compete with domestic first-line products, and AK series products that can replace international brands. There are great advantages in cost performance.
Let's talk about what this electric actuator is used for. The electric actuator controls the opening and closing of the valve, and the valve controls the opening and closing of the pipeline. Valves include manual valves, electric valves, pneumatic valves, electro-hydraulic valves, etc. With the improvement of industrial automation, more and more automatic control valves such as electric valves or pneumatic valves are used on pipelines that originally used manual valves. Electric valves require our electric actuators, which means the actuators are the brains of electric valves. After using electric actuators, the valves can be switched on and off through on-site electric buttons or remote computer systems, thereby controlling the on and off of the pipelines.
Q8: Does the price change every month or is it fixed?
*The price is fixed. Without special reasons such as a sharp increase in raw materials, the price will generally not change.
Q9: Is it in stock or produced after orders? If the production is after the order, how long will it take to produce? Delivery time?
*Export products have different requirements for materials, packaging, etc. They will be produced according to orders.
*Generally, it takes about 10 days for less than 50 units and 20 days for less than 100 units. The production cycle of AK high-end series will be slightly extended.
Q10: What material is this product made of?
*The product has two types of materials: iron shell and aluminum shell. The aluminum shell is small and the small size of the AK intelligent series is aluminum shell, and the conventional model and large size are cast iron. The large size has a large output torque, and the cast iron shell is used because cast iron has a strong pressure bearing capacity.
Q11: Are we currently doing OEM with other brands?
*We do OEM for several domestic units, and we aslo accpet OEM oreders.
Q12: Have we done any relatively large and well-known enterprise projects?
*Our products are used in major domestic steel mills, power plants, water plants (sewage, tap water), coal mine water treatment, coal mine gas extraction, petroleum and petrochemicals, etc.
Q13: Does this product have a service life?
*Yes, the service life is related to the switching frequency of the valve. The valve is installed on the pipeline, and the electric actuator is a device that controls the valve switch. If the valve switching frequency is very high, the actuator will be used more frequently, and the internal gears and turbines, worms, nuts, etc. will have certain wear, but it is much longer than the service life of the valve. Some valves on pipelines need to be replaced after a few years. Generally, the actuator will be replaced at the same time as the valve. At present, our products are used on pipelines, and many actuators from more than 10 years ago are also in normal use.
Q14: Can parts be replaced if the product is damaged?
*It can be replaced. Generally, the limit switch that controls the valve opening and closing is a high-frequency component and may need to be replaced.
Q15: How much does the factory produce per month?
*1,200-1500 sets per month.
Q16: What is the payment methods accepted?
*We accpet TT, Paypal, West Union, World First, Alipay, Wechat Pay etcs.
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