PZ673H pneumatic knife gate valve opening and closing parts of the gate, the direction of movement of the gate and is perpendicular to the direction of flow, the gate valve can only be fully open and fully closed, is not suitable for scaling and throttling. Gate two sealing surface, the most commonly used wedge gate valve sealing surface formed two wedge-shaped wedge angle with the valve parameters, usually 5o. Wedge gate valve can be made into a whole, called the rigid damper; trace deformation of the gate can also be made to improve their craft, to make up for the sealing surface angle deviation in the process, this The gate is called the elastic damper. 
 Type of gate valve, the sealing surface configuration can be divided into wedge gate valve and parallel gate - gate valve wedge gate valve can be divided into: single gate, double plate and the flexible gate type; parallel The gate-type valve can be divided into single-ram type and double plate. According to the valve stem threads are divided into rising stem gate valves and rising stem valve two. 
 Valve closed, the sealing surface can only rely on media pressure to seal, that is, the medium pressure to the sealing surface of the ram pressure to the other side of the seat to ensure the sealing surface of the seal, which is self-sealing. Most of the valve is sealed by force, the valve is closed, we have to rely on external force to the ram pressure to the valve seat to ensure that the sealing surface of the seal. 
 Valve has the following advantages; 
 A. Fluid resistance is small, the sealing surface by scouring and erosion of the media. 
 Two. Opening and closing more effort. 
 3. The medium flows unrestricted, spoiler, do not reduce the pressure. 
 4. Simple form, structure, length, good manufacturing processes for a wide range. 
 Nominal pressure or the pressure levels: PN1.0-16.0MPa, the ANSI the CLASS 150-300LB JIS10-20K 
 Nominal diameter or caliber: DN10 ~ 1000, the NPS 1/2 to 36 
 Connection: flange, butt welding, threaded 
 Applicable temperature: -196 ℃ ~ 700 ℃ 
 Drive mode: Manual, bevel gear, pneumatic, electric, hydraulic, Pneumatic, electro-hydraulic linkage 
 Yao-ring valve products are widely used in water treatment equipment, chemical equipment, petrochemical equipment, petroleum equipment, paper and equipment, mining equipment, power equipment for liquefied petroleum gas equipment, food equipment, pharmaceutical equipment, water supply and drainage equipment, municipal valve , mechanical equipment, valves, valve of the electronics industry, urban construction valves, industrial pipeline valves, common parts and components, industrial equipment, fire HVAC, central air conditioning, filtration equipment, environmental equipment, and other fields. Welcome to purchase made!