Wafer check valve belongs to check valve. The product standard JB / T 8937-1999 wafer check valve is formulated by 3D valve. Applicable to nominal pressure PN1.0MPa ~ 42.0mpa, class150-2500; Nominal diameter DN15 ~ 1200mm, nps1 / 2 ~ 48; On various pipelines with working temperature of - 196 ~ 540 ℃, it is used to prevent medium backflow. By selecting different materials, it can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing medium, urea and other media.
Wafer check valve belongs to check valve. Chaoda valve is responsible for drafting and formulating the product standard JB / T 8937-1999 wafer check valve. Check valve, also known as one-way valve or check valve, its function is to prevent the backflow of medium in the pipeline. The valve whose opening and closing parts open or close automatically by medium flow and force to prevent medium backflow is called check valve. The check valve is an automatic valve, which is mainly used on the pipeline with one-way flow of medium. The medium is only allowed to flow in one direction to prevent accidents.
Edit the purpose of this paragraph
Wafer check valve is applicable to nominal pressure PN1.0MPa ~ 42.0mpa, class150-2500; Nominal diameter DN15 ~ 1200mm, nps1 / 2 ~ 48; On various pipelines with working temperature of - 196 ~ 540 ℃, it is used to prevent medium backflow. By selecting different materials, it can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing medium, urea and other media.
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Carbon steel, low temperature steel, dual phase steel (F51 / F53), titanium alloy, aluminum bronze, Inconel625, SS304, ss304l, SS316, SS316L; Chromium molybdenum steel, Monel (400 / 500), 20# alloy, Hastelloy and other metal materials are made of different materials, which can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.
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170 disc wafer check valve
1. Design and manufacture: api594, API6D, JB / t8937 2, structure length: api594, API6D, din3202, JB / t8937 3, pressure temperature class: snsib16.34, din2401, GB / t9124, hg20604, hg20625, sh3406, JB / T74 4, test and inspection: API598, JB / t9092 5, piping flange: JB / T74 ~ 90, GB / t9112! 9124, hg20592 ~ 20635, sh3406, ansib16.5, din2543 ~ 2548, GB / t13402, api605, asmeb16.47 nominal pressure or pressure class: pn1.0-16.0mpa, ANSI class 150-900, jis10-20k nominal diameter or caliber: DN15 ~ 900, NPs 1 / 4 ~ 36 connection mode: flange, butt welding, thread, socket welding, etc. applicable temperature: - 196 ℃ ~ 540 ℃, valve body material: WCB, zg1cr18ni9ti ZG1Cr18Ni12Mo2Ti、CF8(304)、CF3(304L)、CF8M(316)、CF3M(316L)、Ti。
Edit the structural features of this paragraph
1. The structural length is short, and its structural length is only 1 / 4 ~ 1 / 8 of that of the traditional flange check valve. 2. It has small volume and light weight, and its weight is only 1 / 4 ~ 1 / 20 of that of the traditional flange check valve. 3. The valve disc closes quickly, and the water hammer pressure is small. 4. It can be used for horizontal or vertical pipelines, and it is easy to install. 5. The flow channel is unobstructed and the fluid resistance is small. 6. It has sensitive action and good sealing performance. 7. The valve disc stroke is short The impact force of closing the valve is small 8, the overall structure is simple and compact, the shape is beautiful 9, the service life is long and the reliability is high
Edit the executive standard of this paragraph
1) Product standard general purpose valves iron swing check valves GB / T 13932-92 general purpose valves steel swing check valves GB 12236-1989 general purpose valves iron globe valves and lift check valves GB 12233-2006 wafer check valves JB / T 8937-1999 General requirements for steel valves GB / T 12224-2005 inspection and testing of valves JB / T 9092-1999 2 ）Engineering Standard Code for acceptance of construction quality of building water supply, drainage and heating engineering GB 50242-2002 code for acceptance of construction quality of ventilation and air conditioning engineering GB50243-2002 3) relevant standard drawing 01ss105 selection and installation of common small instruments and special valves
Advantages of editing this paragraph
1. Small volume, light weight, compact structure and convenient maintenance. 2. The valve plate adopts dual type, which can close automatically under the elastic moment of the spring. 3. Due to the quick closing effect, it can prevent medium backflow. 4. The length and size of the valve body structure are small, with good rigidity. 5. It is safe and convenient, and can be used for installation in both horizontal and vertical directions
Edit how this paragraph Works
1. When the medium flows in the specified direction, the valve disc is opened under the action of medium force; When the medium is countercurrent, due to the self weight of the valve disc and the action of the valve disc by the medium reverse force, the sealing surface of the valve disc and the valve seat is closed, so as to prevent the medium countercurrent. 2. The sealing surface of the valve body and disc shall be overlaid with stainless steel.
Edit the installation of this section
1. Both ends of the valve passage must be blocked and there is a dry and ventilated room. If it is stored for a long time, the rust prevention shall be checked frequently. 2. Clean the valve before installation and eliminate the defects caused during transportation. 3. During installation, carefully check whether the marks and nameplates on the valve meet the use requirements. 4. The valve is installed on the horizontal pipeline with the valve cover upward.