The three-bar cut-off butterfly valve includes the valve body, the valve plate and the driving device. The valve plate is opened and closed by a four-bar mechanism. The four-bar mechanism includes an active rod fixed to the main transmission shaft, a two-follower rod between the transmission shaft and the valve plate, and a valve plate. The valve plate support is arranged on the valve plate, the active rod is connected with the valve plate support, and the two follower rods are connected with the transmission shaft and the valve plate support respectively. The butterfly valve drive device drives the main drive shaft to rotate, so as to drive the four-linkage mechanism composed of active rod, two-follower rod and valve plate to move relative to the valve body pedestal, select the appropriate connecting rod size, make the valve plate move according to the set running track, and realize the reliable valve opening and closing action. The lever cutting butterfly valve has the advantages of small structure size and light weight. The valve plate has a period of opening and closing translation process relative to the valve body at the moment of valve opening and closing, and the friction free operation can ensure the sealing performance of the sealing surface for a long time.
1 Suitable for blast furnace hot blast furnace system, can be used as cold air valve, gas (air) cut-off valve, gas (air) combustion valve, flue valve and so on. The utility model has the advantages of compact structure, light weight, small installation space, strict and reliable seal and long life.
2. Main Technical characteristics of connecting Bar cutting Butterfly Valve
The finite element analysis and design are adopted to optimize the size of the connecting rod system to ensure the reliable running track of the valve under high temperature and high pressure. At the same time, we adopt the special structure design of sealing compensation, coating, surfacing wear and corrosion resistant material, multi-layer sealing structure at the shaft end, etc., and the use of many patented technologies makes the connecting rod cutting butterfly valve have the characteristics of high temperature resistance, wear resistance and long life.
* The SQK Rising Stem Gate Valve is exceptionally sturdy, rugged, and durable, with a reputation for quality, integrity, and long service. * They are designed for tight sealing and ease of operation. The valves are available flanged & butt-weld ends in pressure rating from ASME Class 150 to Class 2500, and in a variety of materials of construction. * Gate Valves are of flexible wedge design, outside screw and yoke, and bolted-bonnet construction. The valves conform to API 600. Main features * Bolted body-bonnet design,seal welded & Valves with pressure seal bonnet * Bellows-sealed Gate and Globe valves available * Bolted body-bonnet joints provided with spiral-wound stainless steel gasket and graphite filler for maximum protection against leaks * Die-formed graphite inner packing rings and braided graphite end rings with Inconel wire reinforcement and corrosion inhibitor * T-head stem-disc connection of gate valve fully meets strength requirements of API 602 and API 598 * Rolled ACME thread on stem for smooth operation * Tapered shoulder on the stem for back seating * Self-aligning type gland assembly with stud-and-nut tightening * Integral hard-faced body seat for globe and check valves * Spring-loaded disc on check valves suitable for no horizontal applications too * Gate and globe valves can be offered with electrical actuators * Austenitic SS forging for body and bonnet of Cryogenic valves, resulting in excellent impact strength, minimal heat loss and resistance to corrosion * Valves can be offered to NACE MR-0175 and other special NACE requirements
* The SQK Extended Stem Gate Valve is exceptionally sturdy, rugged, and durable, with a reputation for quality, integrity, and long service. * They are designed for tight sealing and ease of operation. The valves are available flanged & butt-weld ends in pressure rating from ASME Class 150 to Class 2500, and in a variety of materials of construction. * Gate Valves are of flexible wedge design, outside screw and yoke, and bolted-bonnet construction. The valves conform to SQK OS & Y Gate Valve. Main features * Bolted body-bonnet design,seal welded & Valves with pressure seal bonnet * Bellows-sealed Gate and Globe valves available * Bolted body-bonnet joints provided with spiral-wound stainless steel gasket and graphite filler for maximum protection against leaks * Die-formed graphite inner packing rings and braided graphite end rings with Inconel wire reinforcement and corrosion inhibitor * T-head stem-disc connection of gate valve fully meets strength requirements of API 602 and API 598 * Rolled ACME thread on stem for smooth operation * Tapered shoulder on the stem for back seating * Self-aligning type gland assembly with stud-and-nut tightening * Integral hard-faced body seat for globe and check valves * Spring-loaded disc on check valves suitable for no horizontal applications too * Gate and globe valves can be offered with electrical actuators * Austenitic SS forging for body and bonnet of Cryogenic valves, resulting in excellent impact strength, minimal heat loss and resistance to corrosion * Valves can be offered to NACE MR-0175 and other special NACE requirements
Gate Valve Extended Stem
Cast Iron Gate Valve Pressure Rating : Class-125 Material : Cast Iron Description : Bolted Bonnet, Inside Screw, Rising Stem Trim : All Iron / Gun Metal Ends : Flanged Operator : Hand wheel Item Code : CI000004 Size : 50mm Notes : Available Valve Size : 40mm to 300mm
Gun Metal Globe Valve Pressure Rating : Class-150 Material : Gun Metal, Bronze Description : Union Bonnet, inside Screw, Rising Stem Ends : Flanged Operator : Hand wheel Item Code : GM00022 Size : 15mm Notes : Available Valve Size : 15mm to 100mm
Gun Metal Gate Valve BS 5154 Pressure Rating : Class-150 Material : Gun Metal, Bronze Description : Screwed in Bonnet, inside Screw, Non-Rising Stem Ends : Flanged Operator : Hand wheel Item Code : GM000005 Size : 15mm Notes : Available Valve Size : 15mm to 100mm
Brass Gate Valve IS 13114 Pressure Rating : 2MPA Material : Forged Brass Description : Screwed in Bonnet, inside Screw, Non-Rising Stem Ends : Screwed Female to IS:554 Operator : Hand wheel Item Code : IS000026 Size : 15mm Notes : Available Valve Size : 15mm to 25mm
Ductile Iron Resilient Seated Gate Valve BS 5163 Pressure Rating : PN-16 Material : Ductile Iron Description : Bolted Bonnet, Non Rising Stem Ends : Flanged Operator : Hand wheel, Gear, Electric Item Code : DI000020 Size : 50mm Notes : Available Valve Size : 50mm to 800mm
Gun Metal Ball Valve Pressure Rating : Class-150 Material : Gun Metal / Bronze Description : Full Bore, Two Piece Design, Anti Blow out stem Ball : Brass Cr. Plated Stem : HT Brass, Seats : PTFE Ends : Screwed Female to BS:21 / IS:554 Operator : Lever Operated Item Code : GM000132 Size : 15mm Notes : Available Valve Size : 15mm to 100mm
