See-through flapper valves, pneumatic knife gate transmissive, Shanghai brand - Valve Co., Ltd. Shanghai-quality and stability: the whole process of quality control, nuanced, comprehensive detection! Reasonable price: high internal cost control, reducing costs, to help customers! Fast delivery: advanced production lines, adequate stocking, shortening delivery time! Valve solutions provide complete engineering, transmission flapper valve pre-sale, sale and professional services. Product Name: See-through flapper valve Model: PCZ73, PCZ673, PCZ973, PCZ573 drive: hand wheel, sprocket, bevel gear, electric, pneumatic, electric hydraulic connection: clip, in the form of a flange structure: wear Through seal structure: hard seal, soft seal, seal-sided, double-sided seal pressure range: PN10 PN16 150LB Nominal Diameter: DN50- DN1200 common material: cast iron, WCB, stainless steel, duplex steel, etc. nameplate: male workers branded products Description Related Products ordering process transmissive flapper valve _ (pneumatic, electric, bevel gear) transmissive knife gate valve is suitable for mining coal preparation plant, slag, food, paper, pharmaceutical, chemical and other pipeline, connected or disconnect the line of grout, gold powder, ore, slag, coal, pulp, wood pulp, tailings, fibers, dust, chemicals, sewage treatment, sedimentation tanks, asphalt, silos and other media outlet. Transmissive flapper valve is a gate valve is always in close contact with the valve seal, the principle is to have a diameter the size of the opening round mouth the gate, the gate through the gate opening and closing makes opening round with pass Trail done completely out and match the action. The advantage of this valve is that the valve body bore no recess, the media will not jam blockage, and having a full bore flow characteristics, powder particle suitable for use in medium pipe. Sealing structure can be divided into soft seal and hard seal structure. See-through stainless steel pneumatic flapper valve is constructed with precision, good technology, compact structure, sealing seat for design activities, anti-wear and automatic compensation function, and thus longer life. In the process of closing and opening the gate valve has been close with the movement, making the valve opening and closing force is stable, and has cut off the media and so on. According to customer requirements can be equipped with solenoid valves, limit switches, filters, etc. Features a see-through flapper valve, the valve with the overall design ,, fluid resistance, flexible and easy to operate. 2, transmission flapper valve screw drive with dual plane bearing design, the transmission friction is greatly reduced, so that the valve is open, lightweight and smooth. 3, knife gate valve seat seal uses a movable seal, and the use of O-rings provide a preload preload against the valve seat seal leaked greatly reduced, for long-term use of seal pair of worn with automatic compensation increase life. 4, the fixed guide claw, no groove design, easy to cause the accumulation or jammed media. 5, the seat may need the media and working conditions, select metal seal or soft seal: gate using chrome-plated or ion nitriding, the shutter more wear and longer life sealing surface; soft sealing optional PTFE seats or enhanced PTFE seats or EPDM, NBR, sealing, and corrosion-resistant. 6, a wide range of media adaptation: good sealing performance and economic practicability, the operation can be manual, pneumatic, electric, practical range is very wide. See-through flapper valve design standard flange standard GB / T 9113.1-2000 JB / T 79.1-1994 HG 20592-2009 ASME B 16.5 EN 10920-1: 2001 strength and sealing test standard JB / T 9092 -1999 hardness sealing rating MSS SP 81-2001 40ml / inch pressure - temperature ratings GB / T 12224 -2007 ASME B16.34 -2003 ISO 7005-1 standard length of the structure MSS SP 81-2001 GB / T 12221-2005 J16 gate valve opening and closing parts ram, ram direction of motion perpendicular to the direction of the fluid, the valve can only be fully open and fully closed, can not be adjusted and the throttle. Ram has two sealing surface, the two most common mode of sealing surface to form a wedge gate valve, wedge angle with the valve parameters vary, usually 50, the medium temperature is not high for 2 ° 52 '. Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce small quantities of deformation gate in order to improve its process, to make up the sealing surface angle deviations arising during processing, this gate board called the flexible gate. When the valve is closed, the sealing surface can only rely on media pressure to seal, which rely on the sealing surface of the medium pressure to ram pressure to the other side of the seat to ensure the sealing surface, which is self-sealing. Most of the valve is sealed by force, that is, when the valve is closed, to rely on external pressure to force the gate valve to ensure the tightness of the sealing surface. Gate valve with the valve stem linear movement, called the lift rod valve also called clear shot valve. Often movements are trapezoidal threaded rod through the top of the valve guides and valve nut on the rotary motion into linear motion, which is the operating torque thrust into action. Open the valve, when the gate valve lift height equal to the diameter of the 1: 1 times, the fluid channel is completely smooth, but at run time, this position is not monitored. Actual use, is the apex of the stem as a sign that the fixed position, as its fully open position. Temperature appears to consider locking phenomenon, usually open to the vertex position, and then rewind 1 / 2-1 circle, as the position of the valve fully open. Therefore, the fully open position of the valve, according to the position of the gate is determined that the stroke. Some valve stem nut located at the gate, handwheel drive stem rotation, leaving the gate to upgrade, this valve is called the rotating rod valve or valve called the dark bar. Valve closure member Principle (ram) movement do fully open and fully closed off with a vertical path along the centerline. Valve selection Gate Valve is mainly used to cut off or turn on the line of medium, is generally not as a regulator or throttling. Category gate valve can be divided according to different classification methods: parallel gate valve, wedge gate valve, lift gate, rotary valve rod, fast opening and closing valve, necking valve, flat gate valve and so on. Valve fluid resistance characteristics, the applicable pressure, high temperature range, medium flow unrestricted, good sealing performance. Contact Shanghai-Valve Co., Ltd. Tel: 021-31263381 (Chen Gong) Fax: 021-60298264 Mobile: 13512135667 E-mail: xgfm021@163.com Address: Industrial Park, Jiading District, Shanghai Huating 1199 URL: http: // www .xgfmvalve.com Related Products: Rubber Lined Knife Gate More Related Products: bi-directional sealing knife gate