OMT hose fittings Germany OMT model OMT price

OMT hose fittings are components in hydraulic systems used to connect pipelines or attach pipelines to hydraulic elements. This is a general term for connectors that can be assembled and disassembled in fluid paths. Main types include: welded, bite-type, crimped, and flared.

OMT hose fitting installation

Installation is the most critical step, directly affecting sealing reliability. Specialized pre-assembly tools are generally required. Fittings with small pipe diameters can be pre-assembled on a bench vise. The specific method involves using a fitting body as the base, pressing the nut and bite ring onto the pipe. Main types include bite-type straight pipe fittings, bite-type end straight pipe fittings, and bite-type tee pipe fittings. The depth of the tapered hole in these fitting bodies often varies. As a result, when a pipe pre-assembled on a straight fitting body is used for connection to a tee fitting body, the spherical contact formed between the bite ring and the inner tapered surface of the fitting body may not be tight, leading to leakage. This issue is often overlooked. The correct approach is to use the same type of fitting for pre-assembly on the corresponding connection end as used on one end of the pipe. This maximizes the avoidance of leakage issues. Try to maintain the coaxiality of the pipe and the fitting body; excessive deviation of the pipe will also cause sealing failure. The pre-assembly force should not be too high. The inner cutting edge of the bite ring should just embed into the outer wall of the pipe, and the bite ring should not show obvious deformation. If the bite ring deforms severely during pre-assembly, it will lose its sealing function.

OMT hose fitting function

Insert the steel pipe into the bite ring and tighten it using the bite ring nut. The bite ring contacts and cuts into the pipe to create a seal. No welding is required when connecting to steel pipes, which is beneficial for fire prevention, explosion protection, and high-altitude operations, and eliminates drawbacks caused by improper welding. The mechanical advantages and geometric shape of the fitting make this mechanical device a sealing component capable of preventing leaks. The mechanical thrust pushes the rear bite ring against the conical back of the front bite ring, while simultaneously pushing the front bite ring into the tapered converging mouth of the fitting body. The bite ring is squeezed onto the conduit by an inward radial force. At this point, pulling out the front bite ring forms a full-face seal on the tapered converging surface of the fitting body. When hand-tightening feels secure, rotate the bite ring nut further from this manually tightened position to ensure uniform thrust on the seal. This ensures effective sealing even in high-pressure and ultra-high vacuum environments. Therefore, it is a relatively advanced connector in pipeline systems for automatic control devices in oil refining, chemical, petroleum, natural gas, food, pharmaceutical, and instrumentation systems.

OMT hose fitting principle

Quick-change connectors come in two types: one with a check valve and one without. In applications with a check valve, the check valve end connects to the air source. When disconnected, the check valve closes automatically. When connected, the pin at the movable end opens the check valve. Self-locking is achieved by embedding steel balls into grooves, while a "cone-cylinder" sleeve locks the steel balls in place.

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