4 short-term performance requirements of short-term performance is belong to the factory inspection experience in product standard, mainly do the seat tightly closed to try the body tightly closed, used for investigation of molecular compound plastic valve tightly closed performance, within the required molecular compound plastic valves, which permits leak ( Seat leakage) Phenomenon, but also which permits (( The valve leakage) Phenomenon. Seat tightly closed attempt is proved: the valve isolation performance of the pipe system; The Industrial Valves tightly closed experiment is the first FaYue proved: the valve rod tightly closed and the leakage of the valve tightly closed in a petition end things. Requirements of making the 3 a) The performance of the purchased raw materials should be consistent with a literal interpretation of the raw material to produce manufacturer, and accord with the product standards. c) The valve should be in the production factory name or logo. 。 e) Wear-resisting performance in the Industrial Valves, the valve of the preset should ponder question abrasion device using the survival of the fixed number of year, or produce business should be indicated in the operation guide book change whole valve's proposal. d) Between the valve stem and valve body in accordance with EN736 - tightly closed 3. b) Tightly closed device by elements of the help and stem of the valve opening and closing action, should be at the end or middle by friction at any place or to perform device positioning, fluid pressure can not change its position. g) Look from the top of the valve, the valve handle or handwheel should close the valve clockwise. b) On the valve body shall be indicated in Ming materials code, sizes available DN, nominal pressure PN. d) body shall be indicated in Ming yield day or code. 2 the default request a) If only one pressure valve direction, should be the external body with arrow, two-way symmetrical presupposition of the valve should be adapted to the fluid flow and isolation. e) The body should be the person that produce in Ming out is different from the location of code. c) On the basis of EN736 - The body 3, the smallest hole should be accord with the following two points: - Any aperture of medium of circulation for the valve, should be no less than one hundred percent valve DN value of 90; — In the structure of demand from large to small aperture of the valve, medium circulation makers should explain understand international minimum hole, actually. Q: molecular compound plastic valve technical requirements a: 1 the raw material for body and bonnet Marine valves and valve cover materials should be chosen accord with ISO 15493:2003 'industrial use molecular compound plastic piping systems - ABS、PVC - U and PVC - C— Pipe and fitting system specification - Small batch 1: metric series and ISO 15494:2003 'industrial use molecular compound plastic piping systems - PB, PE and PP - Pipe and fitting system specification - Small batch 1: metric series 'regulation. f) All the valves device suitable for use by the flow velocity, with up to 3 m/s. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the valve, the best service, best technical adviser. Thank you for visiting our website, if you have any questions, you can call us, we will be dedicated to provide you with quality services. The factory provides professional ball valve, butterfly valve, gate valve, globe valve, check valve, relief valve, safety valve, Marine valve, oil valve, hydraulic control valve and other kinds of valves.
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