The explosion-proof ball valve is a kind of (spherical) valve that rotates 90° perpendicular to the axis of the channel. It consists of a rotary-type angular-stroke electronic electric actuator and an O-valve structure. It is a rotary type high-performance regulating or switching valve. Automatic control (DCS, PLC system) The input or output of the current signal or voltage signal from the instrument can realize the proportional adjustment of the fluid medium in the process pipeline or the two-position switch control, so as to achieve the flow, pressure, temperature, and Automatic control of parameters such as liquid level.
Characteristics
(1) The explosion-proof ball valve adopts the fixed ball design, and the relative moving parts adopt the self-lubricating material with very small friction coefficient, so the operating torque is small, and the long-term sealing of the sealing grease makes the operation more flexible.
(2) The valve adopts high platform structure and ISO5211 connection standard, which can make the installation of electric/pneumatic actuators more professional.
(3) The explosion-proof ball valve adopts full-diameter or reduced-diameter design, and the flow resistance is small.
(4) Metal hard seal explosion-proof ball valve adopts two-way metal movable sealing structure, with automatic compensation and self-cleaning function, and excellent sealing performance.
(5) The explosion-proof ball valve adopts a fixed ball design and adds a pre-tightening spring, so that the ball valve has an automatic pressure relief function.
(6) Each ball valve has two movable sealing seats, which can be sealed in both directions, so the flow direction of the medium need not be considered during installation.
(7) It has a fireproof and anti-static structure, and a conductive spring is arranged between the valve stem and the valve body and the valve stem and the sphere to avoid electrostatic ignition and ignite the flammable medium. Make sure the system is secure.
(8) Double protection of refractory structure. When the seal is burnt in case of fire, the sealing parts of the ball valve can form a metal-to-metal hard seal structure.
(9) Automatic pressure relief structure. When the liquid medium retained in the cavity of the valve is vaporized due to the temperature rise, and the pressure in the middle chamber is abnormally increased, the medium cavity medium can push the valve seat by itself to automatically release the pressure. To ensure the safety of the valve.
Technical indicators
1. Connection method: butt welding, flange, internal thread.
2. Diameter size: [DN15-DN300].
3. Working pressure: [PN1.6, PN2.5, PN4.0 MPA]].
4. Medium temperature: -20 ° C ≈ 180 ° C. [Materials can be selected according to different industrial controls]
5. Fluid medium: water, oil, gas, gas-based medium.
6. Body material: carbon steel, stainless steel.
7. Sealing material: Polytetrafluoroethylene PTFE, reinforced polytetrafluoroethylene PPL
8. Core material: solid stainless steel ball.
9. Stem material: stainless steel.
10. Filler: Graphite, reinforced polypropylene.
11. Valve body surface: cast steel: matt purple, stainless steel: natural color
Asymmetric Thyristor is the abbreviation of thyristor, also known as silicon controlled rectifier, formerly referred to as thyristor; thyristor is PNPN four-layer semiconductor structure, it has three poles: anode, cathode and control pole; thyristor has silicon rectifier The characteristics of the parts can work under high voltage and high current conditions, and their working processes can be controlled and widely used in electronic circuits such as controlled rectifiers, AC voltage regulators, contactless electronic switches, inverters, and inverters.
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