German HONEYWELL valves HONEYWELL models HONEYWELL prices

HONEYWELL valves use liquid as the working medium to transmit energy and perform control. Hydraulic transmission and pneumatic transmission are collectively referred to as fluid power transmission. This is an emerging technology developed based on the principle of hydrostatic pressure transmission proposed by Pascal in the 18th century, and it is widely used in industrial and agricultural production.

Basic principle of HONEYWELL valves

The basic principle of hydraulic transmission is to use pressurized oil as the working medium in a sealed container to achieve energy conversion and power transmission. The liquid involved is called the working medium, generally mineral oil, which functions similarly to transmission components such as belts, chains, and gears in mechanical transmission. Hydraulic transmission utilizes Pascal's principle! Pascal's principle essentially states that in a closed environment, when a force is applied to a liquid, the liquid transmits this force in all directions with unchanged pressure magnitude! P=F/S. Hydraulic transmission leverages this physical property by applying a force to a small-area object, causing a large-area object to experience a significant force through Pascal's principle, thereby achieving the effect of lifting heavy loads. Hydraulic transmission is also extensively applied in the valve industry, such as in machine tool manufacturing equipment for valves, hydraulic test equipment for valves, and hydraulic transmission devices for valves.

Advantages and disadvantages of HONEYWELL valves

Advantages: 1) Small size and light weight, resulting in low inertia; no major impact occurs during sudden overload or stopping; 2) Can smoothly and automatically adjust traction speed within a given range, enabling stepless speed regulation; 3) Easy reversal; rotation and linear reciprocating motion of the working mechanism can be conveniently converted without changing the motor rotation direction; 4) Hydraulic pumps and hydraulic motors are connected by oil pipes, so there are no strict limitations on spatial arrangement; 5) Since oil is used as the working medium, relative moving surfaces of components are self-lubricating, resulting in low wear and long service life; 6) Simple operation and control with a high degree of automation; 7) Overload protection is easy to implement. Disadvantages: 1) Hydraulic transmission requires high maintenance standards; the working oil must always remain clean; 2) High manufacturing precision is required for hydraulic components, leading to complex processes and higher costs; 3) Maintenance of hydraulic components is complex and requires a high level of technical expertise; 4) Using oil as the working medium poses a fire hazard at the working surface; 5) Low transmission efficiency.

HONEYWELL valve maintenance methods

In the manufacturing process of hydraulic valves, selective assembly is mostly chosen to effectively improve assembly accuracy. This means that for a batch of finished parts, such as spools and valve bodies, the most reasonable fit clearance should be selected based on actual dimensions before assembly, ensuring good sliding performance and sealing performance of the spool. In other words, for hydraulic valves of the same type, there may be differences in the mating dimensions between the valve body and the spool. In actual use, when a company has a large number of failed hydraulic valves, all hydraulic valves can be disassembled and cleaned. Each part is inspected and measured, classified based on the inspection results, and then recombined using selective assembly methods. After inspection, if wear is found on both the valve body and the spool, but there are no severe scratches on the working surface or no severe local wear, appropriate valve bodies and spools can be selected for reassembly. If the fit clearance between the valve body and the valve increases compared to the clearance specified in the product drawings, and the increase is between 20% and 25%, methods should be adopted to increase the spool size, followed by lapping and repair. For cone valve groups, if the contact surface sealing between the seat and the spool is poor, grinding is sufficient because the cone valve can automatically compensate for the gap under spring action. If the wear between the valve body and the valve is uneven or if there are scratches on the working surface, and the above methods cannot restore the hydraulic valve function well, the selection of the valve body and spool should meet the interference requirements in the machining allowance. The valve body bore should be appropriately reamed, and the spool should be appropriately ground, so that shape accuracy and assembly clearance are reasonable.

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