The main type of Tape Measure is Steel Tape, followed by fiber tape, which is the tape that everyone often sees. Many people say it is a cloth ruler, and there is also a waist measurement ruler (tailor ruler/clothing ruler belong to this category). In southern China and Hong Kong, the tape measure is usually referred to as a soft ruler or a pull ruler. The material is PVC plastic and glass fiber, which can prevent the tape from being stretched during use. 3M Tape Measure,Vintage Tape Measure,Cheap Tape Measure,Durable Steel Measuring Tape Henan Liangjin Tools Co.,Ltd , http://www.liangjintools.com
Electric butterfly valve is how to work
Electric butterfly valve is composed of electric actuators and butterfly valves, so it has a butterfly valve is simple, simple structure, etc., are also widely used in chemical, pharmaceutical and other industries. And because of the adjuvant electric actuator, so that the development of the butterfly valve has reached a new level. Electric butterfly valve principle of action: driven by the electric valve stem, so that the disc 90 ° rotation to achieve the valve opening and closing. Actuator principle is actually very simple, just like the daily use of razor, the source of energy is electricity, power driven valve plate operation, so as to achieve opening and closing valves and flow of fluid or stop the role. Electric butterfly valve electric actuator can be divided into the switch type and regulation type, the switch type electric butterfly valve is to play the role of the switch; and regulating electric butterfly valve is to play the role of regulating the flow can accurately adjust the flow rate to a thousand degrees, Is also a relatively high price of a valve. Valve installed in the pipeline as a device, if you go to check the state of the switch does not seem very realistic, so there is a feedback signal. Regulatory type itself with a feedback signal, and the switch can be based on the specific needs of customers to choose whether to install the feedback signal. Here, to introduce the storage method of electric butterfly valve. 1, the product should be stored in a dry and ventilated room, not open storage; seal should not be in contact with oily substances, so as to avoid aging. 2, storage and transportation: A, both ends of the path with stuffy cover, be dust, rust, keep the channel clean. B, electric butterfly valve on both sides of the processing surface should remove dirt, and coated with anti-rust agent. 3, Electric butterfly valve with storage period of more than 18 months should be re-tested before installation and use to ensure the integrity of the structure and function. 4, electric butterfly valve placed, should ensure that the motor unit is not squeezed and terminals damaged, and to prevent contact with corrosive substances. Handling should be handled with care, so as not to damage the electrical components and mechanical parts.