Hard seal butterfly valve, also known as flap valve, is a simple structure of the control valve, but also can be used for low pressure pipeline medium switch control. A hard-sealing butterfly valve is a type of valve that closes (valve disc or disc) a disc and rotates around the valve shaft to open and close, acting primarily to cut and throttle the pipe. Hard seal butterfly valve opening and closing pieces is a disc-shaped disc, the valve body around its own axis of rotation, so as to achieve the purpose of opening and closing or regulation.
First, the product selection points:
1, the main control parameters of the hard seal butterfly valve for the size specifications.
2, the hard seal butterfly valve is a single-plate air valve, its structure is simple, easy processing, low cost, easy to operate, but poor regulation accuracy, only for ventilation and air conditioning system for the switch or coarse adjustment of the occasion.
3, can be manual, electric or zipper operation, can be fixed at any angle of 90 ° range.
4, due to the single-axis single valve plate, the limited capacity, the pressure drop, high flow conditions, the valve life is short. The valve is closed and ordinary points, insulation and non-thermal points.
5, electric butterfly valve only two-position control, electric actuator and leaf valve the same.
Second, the implementation of standards "hard seal butterfly valve" JB / T7228-94
Manufacturing standards: GB / T 122387-89
Flange standard: JB79-59
Testing standards: JB / T9092-99
Sealing butterfly valve 7 big structural features:
1, the hard seal butterfly valve small size, light weight, light operation, easy to install.
2, three eccentric [1] the unique design of the friction between the sealing surface transmission, extending the service life of the valve.
3, produced by the elastic seal torque.
4, hard sealing butterfly valve ingenious wedge design so that the valve has a more automatic sealing function, the sealing surface has a compensatory, zero leakage.
5, can be configured according to user requirements pneumatic and electric devices to meet the needs of remote control and program control.
6, hard sealing butterfly valve replacement parts material can be applied to a variety of media, and can be lining corrosion.
7, the continuous structure of diversification: the folder, flange, butt welding.
Zhejiang Jie Te Valve Manufacturing D343F-16C, D343H-16C-type hard-sealing butterfly valve, widely used in metallurgy, electricity, petroleum, chemicals, air, gas, combustible gas and water supply and drainage and other corrosive media pipeline.
D343F-16C, D343H-16C hard seal butterfly valve main dimensions and connection dimensions:
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