4 is close to closing the gate body has been in contact with the seat without what conditions rotated 90 & amp; 度; 。 4 stem and then increase, and interact with stem spiral groove guide pin, make the spherical stereo hands no friction to rotate. 2. American standard gate valve closing procedures: 1 hand rotation move the final laps, stem at the bottom of the Angle the simplest mechanically to the face of the wedge to the oppression of spherical stereo, make its emergency pressure on the valve seat, tightly closed. 3 when turn the handwheel counterclockwise, the valve stem is reverse movement, its Angle at the bottom of the most simple surface spherical stereo off the seat. 2 in the closed position, the valve body by the Industrial Valves stem [ wiki] Mechanical [ / wiki] Pressure effects, press on the seat. 。 Office principle a: q: American standard gate valve American standard gate valve basic office principle has the following two procedures: a. American standard gate valve opening procedures: 1 until the whole paper, the valve stem to limit position, spherical three-dimensional rotation to the whole paper. 3 then spin hand wheel, stem from embedded in the spiral groove guide pin on the utility, make the stem and disc rotating at the same time 90 & amp; 度; 。 Marine valve closing, 2 hand wheel clockwise, the valve stem to decline and the spherical stereo left the seat to rotate. 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 Industrial Valves, 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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