結構及用途 CONSTRUCTION AND USAHE
This product is made by means of importing the high-tech rubber and the know-how of valve manufacture of Europe and over comes the defectives as rubber aging and rust etc., It uses the compenseating actiion ftrom the micro-deformation of elasticity produced by the elastic gate plate to get the good sealing effect and features the advantages of light on-off, reliable sealing, good memory of elasticity, long duration and so on. It can be used as the adjust and shutoff device on the popeline in tap water, sewage,seawater,water treatment, environmentAl protection, construction, petroleum, chemical indystry, electric power, food medicine, light & textile industry, ship, energy source etc. industries.
平底式閥座Flat-bottom valve seat
For the common gate valves, it is easy to make it unable to tihgtly close the valve and thus resulting in leakage after being rinsed with water because of the foreign matters such as stones, wood blocks, cement, ferric bits, sundry things etc. Which are piled up inside of the concave slot on the valve bottom. The elastic-seat enclosed gate valve uses the same design of flat-bottom as that of the pipeline so as not to be easy to get sundry matters piled up thus making the fluid smoothly flowing without any resistance.
This valve is made of high-quality Ductalloy, resulting in a reduction of weight by about 20%-30% of that of the traditional ones and an easy installation and service.
精鑄閥體Finely casted valve chest
The valve chest is finely casted and the accurate geometric sizes of it makes the internal part umecessary for and process for assuring the valve to be losely sealed.
閥板包膠 Rubber-wrapped valve plate
The valve plate is overally and inside and out-side wrapped with the rubber of top grade and the first-rate know-how of rubber sulphurization of Europe makes the sulphurized valve plate’s geometric size assured with accuracy and the joint between the rubber and the ductalloy valve plate reliable, not easy to fall out and leaves a good elastic memory.
三“O”型環密封圈Three o-type sealing rings
The design of three O-type sealing rings used between both valve rod and valve cover can reduce the frictional resistance at open orclose and water leakage a great deql, and the sealing ring can be replaced without stopping the medium to flow inside of the pipeline.
The traditional low-pressure gate valves are made of cast-iron and often made broken or fragmentized when suffered a collision by a foreign object or a heavy press, which is greaty reduced to the valve chest of this valve due to the Ductalloy of which it is made.
有助生飲 Helpful to uncooked drinking
Because of the non-toxic epoxy resin coated on the internal of the valve chest and the rubber wrapped completely on both inner and outer surfaces of the valve plate,no ferric water or corrosion would occur, thus being helpful to uncooken drinking.
省力裝置 Labour-saving device
To 450-600mm, the labour-saving device as shown in the figure on right-down can be additionally nountedm,with which, the required torque is about 1/2 of the one under the normal condition and, with a small handwheel only. At every time of action, the labour-saving function of the device will not be reset until the valve is fully opened.