Flameproof valve is also called explosion-proof valve, explosion relief valve, and fire damper. Because of its special use environment and application requirements, this product is generally not known to everyone, so it has many names. Flameproof valve is used in The Conduit Above, it can prevent the spread of explosion and avoid the secondary explosion, thus reducing the explosion disaster. To reduce the risk of irreparable damage and loss in production, the flameproof valve is a flameproof device required by safety supervision because of its simplicity and reliability.
Parameters of one-way explosion-proof valve of dedusting pipeline:
Passive dust explosion-proof valve, gravity design, no sensor trigger, normally open and normally closed;
Application: one-way flameproof, negative pressure system, horizontal installation;
Applicable dust: organic dust and inorganic dust (including metal dust);
The caliber ranges from DN100 to DN1000, and a variety of options are available;
Material: valve body carbon steel, coating color RAL3000; Valve disc stainless steel;
Applicable wind speed: 15-30m/s;
Pressure loss: about 200pa;
Withstand bursting pressure: 0.7Kpa;
Applicable dust: dust of St1 and St2 with Kst less than or equal to 300 barg * m/s;
Installation method: horizontal installation, using flange connect;
Installation position: 3-7m inlet pipe of dust removal equipment;
Operating conditions can be detected through integrated sensors, allowing longer maintenance time;
With inspection cover, convenient for inspection;
Optional signal sensor and closed position indication switch And other accessories;
Test reports of domestic institutions can be provided;
Features of one-way flameproof valve of dedusting pipeline:
one-way Safety valve The design structure of the valve is generally divided into two parts, namely, the valve head and the valve seat. Valve head is spool It is an important part of the whole one-way safety valve. The valve seat is a stainless steel or copper annular part installed on the valve head, usually fixed at the outlet of the system.
The design of one-way safety valve shall consider various factors, such as working pressure range, flow, installation position, medium characteristics and working temperature. When selecting a one-way safety valve, it is necessary to select appropriate equipment and specifications according to the actual use of the system.
Operation condition:
1. Under normal operating conditions, the back pressure valve disc inside the valve floats due to air flow, and the flameproof valve opens;
2. In the stop state, the back pressure valve disc relies on the inclined end face at the inlet side due to its own weight;
3. If there is deflagration and explosion on the outlet side of the flameproof valve under allowable conditions, due to the increase of back pressure, the airflow will flow in reverse direction, making the back pressure valve disc close. The pressure wave generated by the explosion will make the throttle blade tightly closed on the inclined end face at the inlet side, thus preventing the explosion from spreading to the upstream pipeline and equipment, playing the role of isolation.
Principle of one-way explosion-proof valve for dust removal pipeline:
The one-way flameproof valve is normally used on the inlet pipe of the dust remover or cyclone separation. It is a simple, economical and reliable flameproof product, which is mainly used to cut off the flame and shock wave generated after the explosion inside the equipment and transmit them to the upstream pipes and equipment. During operation, the disc of one-way flameproof valve is opened by the normal working air flow in the pipeline or is in the normally open state. In case of explosion inside the protected equipment, the valve disc of the flameproof valve is closed by the shock wave.
