Blast Valves

The blast waves are powered from hydraulic, pneumatic, solenoid sources. The length ranges from 25-35mm and above, breadth from 16-38mm and above, height from 20-25mm and above, diameter from 13-26mm and above. The pressure range is up to 600 bar. The device is manufactured using brass.

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Detailed Description for Blast Valves

Blast valve employs rounded metal tubes held in place by springs. Rise in pressure pushes the tubes against the frame of the valve closing the opening. These valves are normally unidirectional in airflow and are employed in big wall structures where large volumes of airflow are needed.

A blast gate is used to isolate distinct parts of a vacuum extraction system. These valves are usually very modest and usually comprise of a sliding or revolving plate which blocks off the vacuum line. They are commonly encountered in dust removal systems fitted in wood working shops to retain all the vacuum lines to unexploited machines closed to maximize the vacuum pressure. Blast gates are typically installed near to the machine suction point and are normally operated by hand, although automated gates are accessible which open when the device is switched on. In large systems with very powerful vacuum pumps, at least one or more of the blast gates are always left open to avert the vacuum collapsing the hoses.

Dust extraction in carpentry shops and other dusty work environments is an essential part of any health and safety regimen. Maximum hobby or commercial woodwork shops that have a centralized dust extraction system  that make use of a vacuum pump which pulls dust from the machine source to a safe collection point through a series of hoses. These pumps are generally not enough powerful to effectually induce negative pressure in every extraction points instantaneously. As all machines served by the dust extraction system seldom work at the same time, those not working are usually isolated from the vacuum system by a blast gate. This maximizes the efficiency of the available vacuum at the working machine stations and ensures adequate dust extraction.


Blast gate valves do not have to ensure a perfect hermetic seal and are usually very simple in their design and operation. Most blast gates are of a sliding design, consisting of an appropriately sized in-line hose fitting equipped with a pair of slide grooves to accommodate a flat shut-off gate. To open the blast gate, the machine operator simply lifts the plate to open the hose and allow the vacuum to draw the dust away from the machine. Once the work is complete, the plate is then dropped back down again to close off the hose and isolate the extraction point again.



In more complex systems, the blast gate may be remotely operated and of a rotating circular gate design. These valves use a spring loaded solenoid to open and close the gate to isolate the inlet point. The solenoid will then draw its power from the machine switch; it automatically opens when the machine is started and closes when it is shut off. This system works particularly well in high demand environments and precludes the possibility of blast gates being inadvertently left open. In very large, high power vacuum systems certain relief valves are left open at all times to prevent the vacuum pressure from collapsing the vacuum hoses.


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