Solitary-performing pneumatic actuators use an individual compressed air enter to show the valve plus a spring to return the valve to its usual position. Double-acting pneumatic actuators have two compressed air inputs to turn the valve and return the valve to the initial place. สินค้านิวเมติกส์ พีเอชเอ ออโตเมชั่น Pneumatic actuators are https://pneumatic-actuator67343.blogsvirals.com/16153108/ห-วข-บวาล-วไฟฟ-า-electric-actuator-things-to-know-before-you-buy