Wafer Butterfly Valve
The valve has compacted structure, small
flow-resistance with the flow pattern tend to be straight so that no sundries
is kept inside. What`s more, it is light and convenient to install. The valve
can be applied to cut off or regulate the flow of media. The valve can be
actuated by operating lever, handle wheel, electric actuator or pneumatic
actuator.
The disc and the stem are connected without
the structure of pin bolts, which guarantees no inner leakage.
Sealed surface of the disc is spherically
shaped, which promotes the sealing capacity and increases the durability, which
is to say even if opened and closed with pressure more than 50000 times, it
remains no leakage.
Upon requests, the disc can be coated with
Nylon or F46, Excellent anti-corrosion.
The valve body is coated with epoxy resin
without any exposure of iron.
The epoxy resin and rubber used comply with
sanitary standard DVGW
The valve can be used in water supply and
drainage, disposing of polluted water, heat supply, gas, ship industry,
metallurgical industry, energy system and textile and so on, especially
applicable to those occasions that bi-directional sealing and valve body are
easily eroded.
Wafer Butterfly Valve,Butterfly Valve Wafer Type,Iron Butterfly Valve Wafer Type,Ductile Iron Wafer Butterfly Valve SUZHOU YUEDA VALVE CO., LTD. , https://www.jsyuedavalve.com
In general, the anti-theft alarm system design should pay attention to the following aspects, which are clearly required by the relevant alarm system standards or associated standards. 
To system design specification, design to practical <br> <br> burglar alarm system must be based on actual on-site investigation, according to the environmental conditions, to prevent objects, the scale of investment, maintenance and other factors Alarming fashion design. The design of the system should meet the requirements of the relevant risk level and protection level standards, and comply with the relevant design specifications, design assignments, and construction and management requirements. Equipment selection should meet the requirements of relevant national standards, industry standards and relevant management regulations.
This point has a higher requirement for the design units engaged in anti-theft alarm systems. At present, many units have not done enough.
It is necessary to pay attention to the advanced nature and interchangeability of the system in accordance with the standards. The design of the anti-theft alarm system should be technically advanced and interchangeable, leaving room for system expansion and/or modification.
According to our work experience, the general system needs to have 20% redundancy.
System accuracy <br> <br> burglar intrusion alarm system shall be capable of accurate and timely detection of intrusion, an alarm signal; intrusion alarm, tamper alarm signal, fault signal sources should be clear and obvious instructions. 
The intrusion alarm system should be capable of sound review. The intrusion alarm system engineering linked with the television monitoring system should be able to perform sound review and image review at the same time.
It is necessary to point out in particular that anti-theft alarm system does not allow leakage alarm.
All paths system integrity <br> <br> system to deal with the invasion of fortified areas to take precautionary measures on the real protection of the weak links that may exist on the invasion route should strengthen preventive measures. There should be no blind spot within 5m of the protected target.
On the integrity issue, it is now more of a problem. We found in daily inspections and inspections that many alarm systems have many loopholes. The key is the lack of completeness in design. To solve this problem, it is necessary to rely on the technical designers to fully understand the standard content and accumulate rich experience in alarm engineering.
System depth protective <br> <br> intrusion alarm systems should be designed depth protection system should be based on the protected object within the risk level and level of protection, the implementation of sub-regional, sub-levels of fortification to prevent the entire region. A complete zone should include four different types of zones: perimeter, surveillance zone, protection zone, and exclusion zone. Different protective measures should be taken for them.
A control center shall be set up in the protection zone, and one or more sub-control centers may be established if necessary. The control center should be located in the restricted area and should be at least in the protected area. 
With regard to the understanding and application of this point in the standard, managers need to pay enough attention. At present, attention is paid to depth issues in the prevention of cultural and art systems, bank vaults, and depository vaults. However, in other aspects, the emphasis on the depth of the alarm system is relatively lacking, and many of them are isolated and lacking in level.
Summary:
Unique Design:
Reliable Sanitation:
Appling Area:
Anti-theft alarm system design should pay attention to several aspects
The design of the alarm system is very important. Now we have found that many units do not carry out serious on-site surveys when building anti-theft alarm systems. They do not incorporate the on-site environment for effective design. They choose the alarm equipment for granted and install it. This is a concern in the promotion and application of burglar alarm systems. Aspects.