What is the material of the platinum electrode of the imported brand pneumatic regulating butterfly valve? 1. Test Method Figure 2 The CTOO test is based on the BS7448 Part 2 test standard, API 1104 and DNV-OS-401 related specifications and requirements, and the CTOD fracture toughness value is used to evaluate the safety of all welded valve body welded joints in post weld heat treatment free. As shown in the figure, according to BS7448 Part 2, the thickness of the sample is B=18, the width W=36, the length L=4 36 ＋ 20, and the crack length a ≈ (0.04~0.55) W. Prefabricate cracks with a fatigue testing machine. Conduct the test with the original CTOD test hardware system and control program on the American 500KN MTS testing machine, and measure the crack growth with a 6-bit (0.00001mm) high-precision digital reading microscope. According to the best method confirmed by the standard, the multi sample method is used to obtain the notch opening displacement of critical cracking; C (or; 0.05).
What should be paid attention to for stainless steel pneumatic butterfly valve device
Stainless steel pneumatic butterfly valves have become more and more popular, gradually replacing copper products in the market (note: inferior copper products contain excessive lead), so today our factory will briefly talk about the precautions for stainless steel pneumatic butterfly valve devices:
Precautions for stainless steel pneumatic butterfly valve device are as follows: 1. The chloride ion content of the medium through the stainless steel pneumatic butterfly valve is ≤ 25PPM.
2. The appearance of stainless steel pneumatic butterfly valve shall be maintained to avoid welding spatter and arc strike burning the stainless steel pneumatic butterfly valve, which is usually maintained with neutral wet asbestos.
3. When selecting flange connecting hose, it is better to select stainless steel pneumatic butterfly valve with loose flange at one end. 4. Stainless steel pneumatic butterfly valve twist channel device is strictly prohibited.
5. It shall not bend along the root of stainless steel pneumatic butterfly valve, and there shall be no dead bending.
6. It is forbidden to mechanically damage the flange sealing surface of stainless steel pneumatic butterfly valve.
7. Do not use chlorine containing detergent or wire brush to remove the dirt in the stainless steel pneumatic butterfly valve.
