Air release valves were designed to allow air flow into the pipe when it is draining, preventing the risk of excessive negative pressure that may cause collapse of the pipe.The valves will also enable drain of small quantities of air- which tend to accumulate in the elevated locations during normal system operation, reducing the effective cross-section of th...
Security sealing elements that have both body and sealing system made of plastic are named plastic seals. Tamper evident seals are security seals used for checking the integrity of protected objects when, in the situation that they are tampered with for fraudulent actions, the security seal is permanently broken and it can not be reattached to the protected ...
Bentonite Waterstops are designed to swell when exposed to water yet maintain a solid structural integrity that will not deteriorate due to uncontrolled expansion, This swelling ability prevents the passage of water through concrete construction joints.
Waterstop strip is a special new type of waterproof product, not only does it have the performance of ordinary rubber products, but also its waterproofing property is better and more reliable than common rubber waterproof products. When it touches water, its volume will swell three or four times than the original volume and it will stuff up all irregular con...
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