The Importance of a Bladder Valve with its Reliability & Excellent Performance

Bladder Valve Mechanical Functions A bladder valve is the complete solution for handling abrasive, corrosive and fibrous products, as well as granulates, powders and slurries. A bladder valve with mechanical functions can either operate with a hand wheel which is the manual type, or the pneumatic type is normally spring closed which requires air to open. Accessories suitable for mechanical bladder valves are solenoid valves, pressure regulator and limit switches. The advantages of a mechanical bladder valve are its free passage, hermetic closing, and the safety function in the event of loss of air or energy. Mechanical bladder valves are available in aluminium body only, with rubber bladder materials including standard natural rubber, FDA approved natural rubber, neoprene and EPDM. Bladder valve industrial areas include: Pneumatic conveying systems Cement and fibro cement Pigment and granulates Ceramics, glass, plastic industry Sewage water and mud industry Tannery Bladder Valves Pressure Relief Bladder valves of the pressure relief type have proved reliability in the industry for over 20 years with 1000 plus applications. They are available in aluminium or plastic (PVC) housing with either flanged PN10/16 ends or screwed socket connections. This type of bladder valve is fitted to a bypass of a pump. The valve is then charged with air and set closed at the pressure it is required to relieve at. If the associated pump becomes blocked or clogged, causing the line pressure to exceed the pressure at which the valve is set closed at, it will open allowing the product to bypass the pump, equalising the pressure until the blockage is cleared. When the blockage is cleared the bladder valve will reset itself in its ‘closed’ position to the original set pressure. A bladder valve with a pressure relief system has a single body casting to ensure there are no chance of leaks. Pressure relief bladder valves are perfect for remote areas because when the valve is set to the required pressure using a foot pump, the air supply is no longer needed. There is no need to reset the bladder valve after the pump starts up or the pressure surges. Bladder Valve Pressure Switches to Detect Leaks The bladder valve optional pressure switch for pressure relief bladder valves has two switches inside a single IP65 housing. It is set so it will send a rising signal when the valve is relieving or a falling signal if there is a problem with the valve. Bladder Valves are Wear Resistant Bladder valves are the best solution for automatic shut-off, in particular with use on dust, suspension materials, sewage, air venting, etc. They come with a variety of choice for the end connections either side of the body, which include tri-clamps, weld-on ends, threaded spigot, Flanged PN10/16, ANSI 150 flanged, internally threaded BSP sockets, RJT connections, and threaded hose nozzles. These wide range of connection options broaden the industrial applications where a bladder valve will be suitable for controlling the flow of product. Bladder Valve advantages include: Reduced weight in comparison to other types such as ball valves & butterfly valves • Extremely compact bladder valves – face to face length much shorter than other conventional valve types. • Suitable for food applications • ATEX conformity available • Complete free passage, no plugging • Excellent weather resistance • Easy maintenance and simple tube replacement Bladder Valve Silo Protection Systems Bladder valve sites where the operation of filling from road tankers takes place can cause damage to silos and their accessories. Normally this is caused by over filling or excessive pressurisation. It is the responsibility of the user to prevent over pressurisation in the form of a silo safety system. There is a unique designed bladder valve with a specially manufactured solenoid valve on the market for this process. The bladder valve will fail closed with loss of air or power. With a regular maintenance plan, bladders can be simply changed before they fail. The tube valve allows the quickest filling time due to lack of obstructions.

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