BALL VALVES

A ball valve, also known as a spherical valve, is a stopcock mechanism used to regulate the flow of a piped fluid and is characterised by having a perforated ball inside as its regulating mechanism.The mechanism is opened by turning the stem linked to the ball, allowing the fluid to pass by aligning the hole in the …

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thermostatic radiator valve

Thermostatic radiator valves are typically used for regulating the medium flow to the radiators of heating systems. When combined to a thermostatic or thermo-electric control head, they keep the ambient temperature of the room where they are installed constantat the set value. This prevents unwanted temperature rises and achieves considerable energy savings. These valves have …

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fire rated doors

Doors and frames are fire rated together as an assembly, not individually as pieces. The integrity of the door assembly is critical to the success of the assembly to achieve and maintain its fire rating. Any penetrations into the door or frame will affect the ability of the assembly to hold its rated resistance to …

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Door Types and Door Frames

A door can be evaluated on a number of important criteria: They must block passage They must open and close easily They should be robust against intrusion They should fit the visual aesthetics of the environment in which they are mounted The basic door is the standard Single- and Double-Leaf Swinging Door. This door includes …

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Access Control System Server and Workstation

Access Control System Server store all of the system configurations and historical data, manage communications throughout the system, and serve the Workstations with real-time data and reports. Servers also control so-called “Global” system decisions or functions that span across multiple Access Control Panels. The Access control System Server is the all-seeing, all-knowing entity that completely …

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Access Control Panels and Networks

Access Control Panels perform the heavy lifting in Alarm/Access Control Systems. Every single function that Access Control Systems perform in the real world occurs first in the “mind” of an Access Control Panel. All Access Control Panels share certain attributes and components. Alarm Input and Output Control Components may be internal or external to the …

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Network Media and Connectors

Cabling is the medium for the transmission of data between hosts on the LANs. LANs can be connected together using a variety of cable types, such as unshielded twisted-pair, coax, or fiber. Each cable type has its own advantages and disadvantages . Three primary types of cable media can be used to connect systems to …

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Identifying Network Topologies

A network topology is the physical layout of computers, cables, and other components on a network. There are a number of different network topologies, and a network may be built using multiple topologies. The different types of network layouts are : Bus topology Star topology Mesh topology Ring topology Hybrid topology Wireless topology Bus Topologies A …

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characteristics of a network

A network is a group of systems that are connected to allow sharing of resources— such as files or printers—or sharing of services—such as an Internet connection There are two aspects of setting up a network: the hardware used to connect the systems together and the software installed on the computers to allow them to …

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electrical switchboards

Switchboards are similar in function to panels, but on a larger scale. A switchboard divides large blocks of electrical current into smaller blocks of current used by electrical devices . Applications range from small office buildings, to large industrial or institutional facilities. Switchboards are low voltage equipment, 600 volts or less. The purpose of a …

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