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Zhejiang Laifual Drive Co., Ltd. is one of professional laifual drive companies . We provide LSD Shorten Thin Harmonic Gearbox, LFS Ultra Flat Harmonic Gearbox, planetary speed reducer and so on. Want to know more? Please contact us. Laifual adopts our newest developed "LS" tooth profile, which improves harmonic reducer's comprehensive performance a lot. Compared to the original "δ" tooth profile, the load capacity of our harmonic drive reducer increases 15%; temperature rise decreases 8-10 ℃; gear's fatigue pitting contact area decreases more than 30%; a lifetime is more than 15000 hours. Types of Harmonic harmonic drive gearbox LSS/LSG/LSN Standard Type/High Torque/Light Weight Harmonic Gearbox LSD Shorten Thin Harmonic Gearbox LFS Ultra Flat Harmonic Gearbox LHT/LHN/LHG Large Diameter Hollow Hole, Flat Shape Harmonic Gearbox LHD Shorten Thin Harmonic Gearbox Composition of harmonic speed reducer Harmonic gear reducer has three basic components：a wave generator,a flexspline and a circular spline. Wave Generator Harmonic Gear Reducer is made up of a ball bearing and an elliptical cam. The wave generator is usually attached to the input end, the inner ring of the bearing is fixed around the cam causing the outer ring of the bearing deforms to an elliptical shape. Flex Spline It is an elastic thin-walled component with gear teeth on the outer surface. Harmonic Gear Reducer is usually fitted to the output end. Circular Spline It is a rigid steel ring with internal teeth. Harmonic Gear Reducer usually has two more teeth than the flex spline, and generally mounted onto a housing. Harmonic drive working principle As a reducer, the harmonic gear reducer is often in status as the wave generator drives, the circular spline is fixed, and the flex spline is output end. When the wave generator is put inside of the flex spline, the flex spline is forced into an elliptical shape causing the flex spline teeth to engage with the tooth profile of the circular spline along the major axis of the ellipse, with the teeth completely disengaged across the minor axis of the ellipse. The rotation of the wave generator makes the flex spline deform continuously, the teeth change operating state in the process of engagement and disengagement, thus the motion transmission between wave generator and flex spline is realized. Characteristics of Harmonic Gear Reducer High accuracy A good percentage of harmonic gear reducer's teeth are meshed at all times and are engaged at two zones 180 degrees apart. This means influences of tooth pitch errors and accumulated pitch errors on rotational accuracy are neutralized, which assures high positional and rotational accuracy. High speed reduction ratio A harmonic gear reducer has high single-stage reduction ratios of 1/30-1/500. Three basic components along same axle without complex structures can provide high reduction ratios. High torque capacity Each tooth subjected to a negligible amount of force yet provides a high torque capacity because of the way the teeth come into contact with each other and because a good percentage of the teeth in the flex spline is engaged at all times. Small-sized and light weight While being less the size of conventional gearing mechanisms and less the weight, the harmonic gear reducer provides the same levels of torque and speed reduction ratios as its conventional counterparts enabling machinery and equipment to be made smaller and lighter. Superior efficiency and long life time As a professional harmonic drive company in China, Laifual produces harmonic drive reducers with superior efficiency and long service time. Quiet and minimal vibration operation Laifual's harmonic drive reducers also operate with quiet and minimal vibration.

Minimum Order: 1 bags

ball valve is a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the medium can flow through or is blocked. They are characterized by a long service life and provide a reliable sealing over the life span, even when the valve is not in use for a long time. Flanged ball valves are characterized by their connection type. The ports are connected to a piping system via flanges that are usually designed in accordance with a certain standard. These valves provide a high flow rate since they typically have a full-bore design. When choosing a flanged ball valve, besides the pressure rating, you also have to check the flange compression class which indicates the highest pressure this connection type can withstand.

KXC bellow seal valve has a compact structure and is one kind of control valve to balance the pressure. Bellows are used as the valve stem sealing components of the bellow seal valves. To avoid the leakage of the valve stem, the valve adopts the structure with bellows instead of stuffing boxes generally used for the ordinary valve or the structure with both bellows and stuffing boxes. The bellow seal valve is particularly suitable for pipelines of steam and flammable, explosive and hazardous media. Moreover, because of bellow's properties of deformation and aging resistance, the bellow seal valve overcomes the common latent defects, including temperature sensitivity and the aging of the stuffing box, and these defects are owned by the valve sealed by packing.

Eccentric Butterfly Valve description: KXC WCB Flange Triple Eccentric Butterfly Valve with the best flange, our DBV are very professional in industrial valve manufacture Triple eccentric butterfly valves are characterized in that the high temperature and corrosion resistant alloy material is welded on the sealing surface layer of the valve seat, and the multi-layer soft sealing ring is fixed on the butterfly plate. This process makes the triple eccentric butterfly valve more resistant to high temperature, high pressure and corrosion compared with traditional butterfly valves.

We offer double eccentric butterfly valves in DN200-2800 designed with durability in focus. The tilted and firmly secured disc, the optimised seal design and the corrosion protected shaft end zones are all features that exceed the market standards. Longer service life due to tilted disc The tension on the disc is released after a few degrees of opening which minimises wear of the disc seal. Furthermore, the design minimises the compression of the sealing which ensures low operating torques. Eccentric Butterfly Valve Applications Our KXC double eccentric butterfly valves are well suited for water supply applications.

Flange Butterfly Valve description Low head loss. Vulcanized seat that avoids the contact between fluid and cast iron, avoiding corrosion and damages. 100% water tight. Bidirectional flow. Polished disc borders to avoid damage in the seat. No gaskets needed for installation. Working temperature between -10ºC and 90ºC. KXC Double flange butterfly valve used for regulation and flow sectioning in water supply facilities, plumbing, irrigation, etc. It has low head loss due to a hydrodynamic design of the disc, it is 100% water tight and need no gaskets to be installed.

butterfly valves range in sizes from DN 40 (40 mm) to DN 2000 (2 metres) and pressure ratings vary from PN 10 (10 bar) to PN 40 (40 bar). Stocked butterfly valves are available in a variety of materials such as cast iron, ductile iron with approved epoxy coating, stainless steel, PVC and FIP thermoplastics. KXC provide riser extensions, gearboxes & automated valves with either electric or pneumatic actuators to order to suit our butterfly valves, in a fast turn-a- round time. Buried service option is available on request . Refer to the appropriate data sheet for full details on KXC Flange butterfly valves. Flange Butterfly Valve Specifications: Size: DN50-DN400 Pressure: PN10/PN16 Standard: ISO5211, DIN2501 PN10/PN16, DIN3202

KXC Butterfly valve consist of a disk which forms a seal against an elastomer or metallic seal. The disc rotates inside the body thereby restricting or allowing the flow. Butterfly valves are very versatile. It can be used for manual or process control, throttling on/off of liquids or gases. They are often used because of their shot take-outs and lower costs Lug type butter fly valve is usually used where the valve is at the end of a pipe since there will be no 2nd flange to secure the studs. Instead, lugs are cast on the valve with tapped holes which matches the bolt pattern for the size and pressure classification of the flange. Bolts are passed through the flange holes and are threaded into tapped holes of the lug

Wafer Butterfly Valve KXC Butterfly Valves are used for isolating and regulating flow. The closing mechanism is a disc that allows for quick shut off, much like a ball valve. Butterfly valves are light in weight so they require less support. Unlike the ball valve, the disc is always present within the flow, therefore a pressure drop is always induced during flow, regardless of valve position. The disc is typically rotated a quarter turn when the valve is fully opened, but the valve may also be opened incrementally in order to throttle flow. Wafer Type Butterfly Valve Wafer type ball valves fit between two flanges, with studs passing from one flange through other. The valve is held in place and sealed with gasket by the tension of suds. These are considered low cost butter fly valves.

Our range of KXC metal seat gate valves are cast in foot design for stability and safe and easy storage with fixed lifting devices for simple installation. Metal Seat Gate Valve Specifications: Size: DN80-DN800 Pressure: PN10/PN16 Standard: EN593, DIN 2501 PN6/10/16, DIN3202 F4 Materials: Body : Cast Iron Seal : Cast Iron+brass Stem : Stainless Steel 304

Cast Steel Gate Valve Specifications: Size: DN40-DN600 Pressure: PN10/PN16 Standard: EN593, DIN 2501 PN6/10/16, DIN3202 F4 Materials: Body : WCB Metal Seat Gate Valve Seal : WCB+2Cr13stainless steel Stem : 2Cr13stainless steel KXC gate valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening.More detail please click here

Resilient seat gate valves for water supply pipelines KXC Resilient seat gate valves are suitable for pipelines transporting drinking, raw or waste water with a temperature no higher than 60°C. The gate valves and the components that come into contact with drinking water comply with standard EN 1074-2 and the drinking water regulations of many countries respectively. Composed of strong and durable ductile iron, resilient seat gate valves operate in two different ways: Resilient seat gate valve Specifications: Size: DN50-DN800 Pressure: PN1.0-1.6MPa Standard: BS5163, BS4504 PN10.PN16/EN 1092

KXC Resilient seat gate valves are gate valves with an elastomer lined wedge. They are especially used for waste water, drinking water supply and irrigation. Gate Valve Specifications: Size: DN40-DN400 Pressure: PN10/PN16 Standard: EN593, DIN 2501 PN6/10/16, DIN3202 F4 Materials: Body :Ductile Iron Seal : Ductile Iron+EPDM(Soft Seated) Stem : Stainless Steel 304 Resilient Seat Gate Valve Characteristic: Medium: Water, Waste Water, Air, Oil Temperature: -20 to 120℃

Technical parameter: Ratio range: basic type 25～4000 Torque range: 2.6～900 kNm Power range: 22～1920 kW 1). P series planetary gear units adopts modular design and can be combined according to customer requirements. It is a new type of reducer with wide versatility. 2). The gear units is driven by involute planetary gears, which make rational use of internal and external meshing and power splitting. 3). All gears are carburized and quenched to obtain high hardness and wear- resistant surface. After heat treatment, all gears are grinded, which reduces noise and improves the efficiency and service life of the whole machine. 4).The planetary gear unitshas the characteristics of light weight, small volume, small transmission ratio range, high efficiency, stable operation, low noise and strong adaptability.

Minimum Order: 100