ZJHP through single-seat control valve

Through single-seat control valve product introduction:

Through single-seat control valve from the valve body, valve seat, valve, valve cover, guide sleeve, stem and packing and other parts. The valve core and valve stem connected together. The available interference fit pin fixed or threaded connection pin fixed connection method single-seat regulating valve, valve stem and valve body can also be a car. In the valve cover and the valve body is provided between the guide sleeve, the mobile guide for valve. The guide sleeve holes, the inner cavity of the valve body and the valve outlet. The guide sleeve cavity medium easily through the hole into the valve outlet, will not affect the movement of the spool.

Through single-seat control valve application scope:
Through single-seat control valve for occasions in clean medium leakage requirements more stringent, pressure.

Straight-through valve structure adjusting:

Straight-through valve single-seat regulating valve has a valve core and a valve seat. Characteristics of small amount of leakage, easy to ensure the seal. The structure is regulated through single-seat control valve and cut-off straight-through single-seat regulating valve. Differences between regulated and cut off the different shape of the spool. Regulating valve shape for the plunger type; cut-off valve in the shape of a flat or conical, another characteristic of cut-off is that force medium on the spool, the unbalanced force, especially in the high differential pressure, large diameter of the situation is more serious, so only for low pressure difference occasions. Otherwise, execution mechanism suitable selection of large thrust, or with the valve positioner.

Straight-through valve single-seat regulating valve is formal and install two types. When the spool is moved downward, the valve core and valve seat between the flow area is reduced, called dress; otherwise it is called reverse loading. Regulating valve nominal size DN and dN marks the valve seat diameter size. For the single direction valve nominal size DN<2.5mm, only dress can not be reversed. Therefore open air must use reverse actuator. Increasing the gas open control valve with the signal pressure and flow area increases; and the air close is the opposite, with the increase of pressure signal and the flow area is reduced.

Straight-through valve Standard Specification for single-seat regulating:
Design and manufacturing standards:
The structural length standard: GB/T 12221-2005
The connecting flange standards: GB/T 9113
Pressure - temperature rating: GB/T 12224-2005
Testing standard: GB/T 13927-2008