Created on:2022-02-19 09:54

Fault analysis and troubleshooting of one-way throttle valve

Fault analysis and troubleshooting of one-way throttle valve

It can be seen from the structural diagram of the one-way throttle valve that the valve core of Li type medium and low pressure one-way throttle valve plays the role of throttle valve in forward flow and one-way valve in reverse flow. Refer to the corresponding contents of check valve and for troubleshooting. However, when acting as a check valve, it is not sealed by the conical surface, but by the outer circle of the cylindrical slide valve, which is inevitable to have internal leakage. When the internal leakage is large, it will affect the failure of the positive throttling adjustment function. In addition, when the hole a on the valve core in Fig. 100 is not drilled through or blocked by salt slag and other dirt of the salt bath furnace during heat treatment, there will be a fault that the adjustment force of the handle is too large or cannot be adjusted at all. It is necessary to minimize the matching clearance between the valve core and the valve body. In addition, whether the product is delivered or repaired, it should be noted that the a hole is not blocked by dirt.


For LDF type medium and high pressure one-way throttle valve, the one-way valve and throttle valve are separated. At this time, refer to the relevant parts of check valve and throttle valve (such as lf valve) for troubleshooting. It is worth noting that at this time, the non tightness of the conical surface of the check valve core will affect the minimum regulated flow of the throttle valve in addition to the relevant faults of the check valve.

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