WORM GEAR CAST STEEL BALL VALVE
The single-stage transmission ratio can reach more than 1:100 (ordinary gear transmission is usually ≤1:10), which greatly simplifies the transmission structure and is suitable for scenarios that require a high reduction ratio (such as large-caliber valve drive). The transmission ratio is accurate and stable, and the output torque is highly controllable.
OVERVIEW
The ball valve evolved from the plug valve. Its opening and closing part is a sphere. The ball is used to rotate 90° around the axis of the valve stem to open and close. Ball valves are mainly used on pipelines to cut off, distribute and change the flow direction of media. Ball valves designed with V-shaped openings also have good flow regulation functions.
The ball valve not only has a simple structure but also has good sealing performance. Moreover, within a certain nominal size range, it is small in size, light in weight, consumes less material, has a small installation size, has a small driving torque, is easy to operate, and can easily open and close quickly. It is one of the valve types that has developed rapidly in the past ten years. . Especially in industrially developed countries such as the United States, Japan, Germany, France, Italy, Spain, and the United Kingdom, ball valves are widely used, and the varieties and quantities used continue to expand, and are moving towards high temperature, high pressure, large diameter, high sealing, and long-term use. With its long life, excellent regulating performance and multi-function in one valve, its reliability and other performance indicators have reached a high level, and it has partially replaced gate valves, globe valves and throttle valves. With the technological advancement of ball valves, they will be more widely used in the foreseeable short term, especially in oil and gas pipelines, refinery cracking units and the nuclear industry. In addition, ball valves will also become one of the leading valve types in large and medium diameter, medium and low pressure fields in other industries. The advantages of ball valves are:
1) It has the lowest flow resistance (actually only equivalent to a section of circular pipe of the same nominal size).
2) Because it will not get stuck during operation (when there is no lubricant), it can be reliably used in corrosive media and low-boiling point liquids.
3) Complete sealing can be achieved within a larger pressure and temperature range.
4) Quick opening and closing can be achieved. The opening and closing time of some structures is only 0.05-0.1s to ensure that it can be used in the automation system of the test bench. When the valve is opened and closed quickly, the operation will be impact-free.
5) The spherical closing piece can be automatically positioned at the boundary position.
FLOATING BALL VALVE
Features
◆ The actuator connection adopts ISO5211 international standard
◆ Full-bore structure and locking device design
◆ Strong flow capacity, small flow resistance, two-way sealing
◆ Valve stem anti-fly-out structure, fireproof and anti-static design
Overview application
◆The ball of floating ball valve has no supporting shaft and is held by the valve seat in a "floating" state;
◆Widely used in petroleum, chemical, natural gas, electric power, metallurgy and other industries for cutting off or a small amount of adjustment.
Technical Parameters
◆Nominal diameter: DN15~DN200 (1/2"~8")
◆Pressure level: PN16-PN100 (class150~600)
◆Operating temperature: -40C~450C◆Connection method: flange, thread, welding
◆Sealing form: soft seal, metal seal
Main material
◆Valve body: carbon steel, stainless steel, alloy steel, duplex steel, etc.
◆Valve core: stainless steel, duplex steel, etc.
◆Valve seat; soft seal; PTFE, R-PTFE, PPL, PEEK
◆Metal seal spraying: STL, WC, Ni60, Cr3C2, etc.
TRUNNION BALL VALVE
Features
◆ Fireproof design with anti-static device
◆ Full bore design, strong flow capacity and small flow resistance
◆ The valve cavity automatically releases pressure and has good safety protection performance.
◆A variety of structural forms to choose from
Overview application
◆ The trunnion ball valve adopts a trunnion ball structure and does not move after being pressurized: it can be adapted to high pressure and large diameter situations, and can use a full-bore or reduced-bore structure as needed.
◆ Widely used in petroleum, chemical, natural gas, electric power, metallurgy, food and other industries.
Technical Parameters
◆ Nominal diameter: DN50~DN1200 (2"-48")
◆ Pressure level: PN16~PN420 (class150~2500)
◆ Working temperature:-40°C~450°C
◆ Connection method: flange, welding Sealing form: soft seal, metal seal
Main material
◆ Valve body: carbon steel, stainless steel, alloy steel, duplex steel, etc.
◆ Valve core: stainless steel, duplex steel, etc.
◆ Valve seat: Soft seal: PTFE, R-PTFE, PPL, PEEK
◆ Metal seal spraying: STL, WC, Ni60, Cr3C2, etc.
MODEL COMPILATION
Additional codes for ball valves:
V indicates that the valve core has a V-port structure, D indicates low temperature, B indicates insulation, P indicates eccentric structure, U, S and DY mostly indicate top-mounted type;
Ball valve name code:
Q means ball valve; Ball valve drive code: 2 means electro-hydraulic, 3 means turbine, 6 means pneumatic, 7 means hydraulic, 9 means electric, manual has no code;
Connection mode code:
1 means female thread, 4 means flange type, 6 means welding, 7 means wafer type;
Structural type code:
Floating type: 1 means straight flow channel, 2 means Y-port, 4 means L-port, 5 means T-port;
Trunnion type: 0 means hemispherical straight-through, 6 means four-way flow channel, 7 means straight-through flow, 8 means L-port, 9 means Y-ort;
Seal material code:
B babbitt alloy, F fluorine rubber, F46 fluorine lining, H alloy steel, J rubber lining, M Monel alloy, N nylon plastic, Monel P, Y hard alloy, W valve body direct processing;
Pressure grade code:
16 means the pressure is 16 kilograms (1.6Mpa) and the maximum pressure can reach 64Mpa; 150LB means the American standard pound pressure, and the maximum pressure level can reach 2500LB (150LB=1.6MPA/300LB=2.5-4.0mpa/400LB=6.4 mpa/600LB=10mpa); 5K represents daily pressure, the maximum pressure is 63K;
Valve body material code:
A titanium and titanium alloy, C carbon steel, I chromium molybdenum steel, P stainless steel, S plastic.
SCOPE OF APPLICATION
Industrial scenarios: used in petroleum, chemical, and power systems to regulate or cut off water, steam, gas and other media, especially suitable for high-temperature and high-pressure environments such as smoke and air ducts and gas pipelines;
People's livelihood areas: used as cut-off valves in low-pressure pipelines such as heating, water supply and drainage.
MANUAL VALVES
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