Spindle assembly is a crucial part for your lawn mower cutting deck that work together with the pulleys and belts to perform clean and even mowing.
It is combined from bearings, spindle housings, spindles, tubes, dust cap, screw nuts, etc.
Which kind of spindle assembly does QFQP produce?
We produce various kinds of spindle assembly, especial for riding mower (with aluminum/ductile iron housings). All parts assembled by our experienced workers.
Where are the products sold?
Main of our customers is from USA, CANADA.
Why choose QFAP?
We have specialized in producing high precision mechanical parts more than 10years, got 6years experience on mower deck spindle assembly.
All of our cooperators are large bearing companies, mower companies or agricultural equipment companies, most of our products are shipped to North America and Europe.
Because of the long term cooperation, we could supply our customers not only the products but also our recommendation on the designs to saving costs.
To meet your demand, we are a manufacturer, also we are a designer.
Spindle Assembly,Lawn Mower Spindle Assembly,Spindle Motor Assembly,Spindle Axle Assembly SHAOXING QIFENG AUTO PARTS CO., LTD. , https://www.sxqfap.com
Safety valve breakdown and distinction introduced
Safety valve is a closed system security valve with its opening and closing parts subject to external forces in a normally closed state, when the medium pressure of the closed system rises above the safety valve when the value of the automatic open, through to the system Discharge media to reduce system pressure and prevent damage to high pressure systems in the system. Safety valves are automatic valves, mainly used in boilers, pressure vessels and air conditioners, solar pipes, the control pressure does not exceed the specified value, the personal safety and equipment plays an important protective role. Safety valve terminology: (1) safety valve. An automatic valve. Instead of using any external force, it uses the force of the medium itself to discharge a nominal amount of fluid to prevent the pressure in the system from exceeding a predetermined safety value. When the pressure returns to normal, the valve closes again and the medium continues to flow out. (2) direct load safety valve. A direct acting mechanical load, such as heavy hammer, lever weight or spring to overcome the valve pressure under the pressure generated by the force of the safety valve. (3) Safety valve with power-assisted device. The safety valve with a power-assisted device, can be opened below the normal opening pressure. Even if the auxiliary device fails, such safety valve can still meet the standard requirements. (4) Safety valve with additional load. This safety valve always maintains a pressure of increased sealing before the pressure at its inlet reaches the cracking pressure. This additional force (replenishment load) may be supplied by external energy and should be reliably released when the relief valve reaches the cracking pressure. The size should be set that is assumed that the additional force is not released, the safety valve is still in the import pressure does not exceed the national laws and regulations to open the pressure percentage under the premise of reaching the rated displacement. (5) Pilot-operated safety valve. A safety valve that is driven or controlled by draining the medium from the pilot valve. The pilot valve itself should be in line with the requirements of the standard direct load safety valve. (6) Proportional safety valve. A safety valve that opens or closes proportionally over the entire opening height range or over a substantial opening height. (7) Full-Kai safety valve. A kind of open only in the small range of opening ratio, and then suddenly opened to the fully open position of the safety valve. Open the height of not less than 1/4 runner diameter. (8) Micro-Kai safety valve. Is a direct acting safety valve for liquid media only. Open height from 1/40 ~ 1/20 diameter of the runner. (9) Opening pressure (rated pressure). Under the conditions of operation, the safety valve flap starts to have a rising inlet pressure, at which point a measurable opening height begins and the medium is continuously discharged, either visually or by auditory support. (10) discharge pressure. Valve to achieve the required opening height of the inlet pressure. The upper limit of discharge pressure is subject to the requirements of relevant national standards or codes. (11) over pressure. The difference between discharge pressure and cracking pressure, usually expressed as a percentage of cracking pressure. (12) back seat pressure. After discharge valve flap contact with again, that is, when the opening height becomes zero inlet pressure. (13) Opening and closing pressure. The difference between cracking pressure and cracking pressure is usually expressed as a percentage of cracking pressure and breaking pressure. It is expressed by the pressure difference between cracking pressure and opening pressure only when the cracking pressure is low. (14) back pressure. Pressure relief valve outlet. (15) Rated discharge pressure. The standard specifies the upper limit of discharge pressure. (16) Seal the test pressure. The inlet pressure of the seal test was measured at which the leakage rate through the sealing surface of the closure was measured. (17) open height. The actual lift of the valve leaves the closed position. (18) Flow path area. Refers to the minimum cross-sectional area of ​​the flow path between the valve inlet to the sealing surface of the closure, used to calculate the theoretical displacement without any resistance effect. (19) runner diameter. Corresponds to the diameter of the runner area. (20) curtain area. Cylindrical or conical shaped passage area formed between the sealing surfaces when the valve flap is above the valve seat. (21) Emissions area. The minimum cross-sectional area of ​​the fluid passage during valve discharge. For the full revelation of safety valve, the discharge area is equal to the flow area; for the micro-safety valve, the discharge area is equal to the curtain area. (22) Theoretical displacement. Is the flow channel cross-sectional area and safety valve flow channel area equal to the ideal nozzle calculation of displacement. (23) Displacement coefficient. The actual displacement and the ratio of theoretical displacement. (24) Rated displacement coefficient. The product of the displacement coefficient and the reduction factor (0.9). (25) rated displacement. That part of the actual displacement allowable as a safety valve benchmark. (26) Equivalent displacement calculation. Refers to the pressure, temperature, the nature of the media and other conditions and rated displacement of the same conditions apply, the safety valve displacement calculation. (27) Frequency hopping. Valve poppet quickly abnormal movement back and forth, in motion valve contact valve seat. (28) Flutter. Valve poppet quickly abnormal movement back and forth in motion, the valve does not contact the valve seat.