Soft seal gate valve, also known as the lifting rod valve (also known as rod valve). Trapezoidal thread is usually on the lifting rod, through the valve at the top of the nut and the guide groove on the valve body, the rotary motion into a linear motion, that is, the operating torque into the thrust. When the valve is opened, the fluid path is completely clear when the ram height is equal to 1: 1 of the valve diameter, but this position can not be monitored during operation. The actual use is based on the top of the valve stem as a sign, that is, an open position, as its fully open position. To consider the temperature change lock phenomenon, usually in the open to the top position, and then back 1 / 2-1 lap, as a fully open valve position. Therefore, the valve fully open position, according to the gate position (ie stroke> to determine .This valve should be generally horizontal installation in the pipeline.Soft sealed gate valve features: Light weight: The body is made of advanced ductile iron, the weight of more traditional Gate valve weight to reduce about 20% -30%, easy installation and maintenance. Flat-type valve seat: the traditional gate valve is often washed in the water after the tube due to foreign objects such as stones, wood, cement, iron filings, debris, etc. deposited in the valve Not easy to close the tightness of the formation of water leakage phenomenon, the elastic seat gate valve bottom with the same flat design with water pipes, not easy to cause debris siltation, so that the fluid flow unimpeded. Overall encapsulation: the valve with high quality rubber for the whole In-line, outsourced, Euro-Flow rubber vulcanization technology enables the vulcanized valve to maintain its precise geometry, with rubber and ductile iron Valves securely attached to the valve, Precision casting, precise geometry allows the valve body without any finishing to ensure that the valve seal. Embedded copper nut: copper nut and flexible valve with embedded engagement, so that the two closely integrated into one, not because of water flow caused by vibration and loose or damaged. Corrosion resistance: the valve body with powder epoxy coating, Can prevent the corrosion and rust of the valve body, and the Secretary can be used for sewage system. Not easy to crack: In the past, the traditional cast iron gate valve often due to foreign objects hit, collision or heavy pressure caused by the phenomenon of fracture, etc. As the body to ductile iron, Three kinds of "O" ring seal: As the stem with three "O" ring seal is not counted, can reduce the friction resistance when closed, significantly reduce the leakage phenomenon and can stop water construction Replacement of the sealing ring helps to drink: mountain in the body to non-toxic epoxy coating, the valve inside and outside the surface are completely covered with rubber without rust or corrosion phenomenon, for raw drink. Of the opening and closing pieces of the gate, the direction of movement of the gate perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, can not be adjusted and throttling. A sealing surface, the most commonly used gate valve form two wedge sealing surface, wedge angle varies with the valve parameters, usually 50, the medium temperature is not high 2 ° 52. Gate valve wedge can be made A whole, called rigid gate; also can be made to produce a small amount of deformation of the gate, to improve its technology to make up for sealing surface angle in the process of deviation, this gate is called a flexible gate.
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