Gate Valve is used for isolation of a process line in the chemical and petrochemical industries. The safety of process equipment often depends on the reliability of these “key equipment” valves. Contact
Wedge and Slab Gate Valves:
The main features of tight shut-off Gate Valves are the full bore design, the availability of metal or resilient sealing arrangements, and the choice between wedge of parallel seated designs. Jacketed wedge gate valves are mainly used in the polymer industry. Bellow-sealed wedge gate valves with welded lip seals are suited for toxic and lethal product. Slab gate valves are recommended for isolation of ethylene furnaces where heavy feed stocks are cracked.
Double Disc Slab Gate Valves:
he double-disc gate valve has two separate stellited discs and two removable stellited seat rings; these discs are moving between two guides plates; when the two discs are in closed position, a flexible wedges system which is located and fixed on the side of the cavity body applies the necessary seating forces on the two discs to obtain the necessary tightness against the seats. This design feature offers the solution to other designs that are known to become jammed due to high temperatures and the “sticking” of the discs. These discs are then “dragged” along the seats without the proper release damaging the seats and making it very problematic to seat again without using excessive amounts of steam.
Single Disc “Slab” Gate Valves:
The Single or “Slab” gate design provides the end user with a long term reliable solution for line isolation. The flexibility of the slab gate design including flange connections, materials of construction, and the choice of actuation – whether it is best suited for hydraulic, electric, pneumatic, or hand wheel gear operation will fit the needs of design engineers. The slab gate design also offers a much smaller footprint and can bring a substantial weight savings over the traditional ball valves and wedge style gate valves.
For further information Contact Us Here.