A transfer valve comprising a first port 17 for supplying and ejecting a pressurized fluid, a second and third ports 18 and 19 for output, and a fourth and fifth ports 20 and 21 for ejection and supply includes a pilot supply channel 24 for supplying a pilot fluid to a pilot valve 13. The pilot supply channel 24 is connected to the first, fourth, and fifth ports 17, 20, and 21 via check valves 38a, 38b, and 38c, respectively.

Pilot 5-port transfer valve

A four-way valve for reversible refrigeration cycle. It comprises a casing, a delivery tube in communication with a compressor and opening into the casing, a suction tube in communication with the compressor and opening into the casing, a pair of tubes in communication with two heat exchangers respectively, and opening into the casing one on each side of the suction tube, valve means for communicating the suction tube selectively with either one of the pair of tubes; and a two-way pilot valve mounted longitudinally to the casing. The two-way valve longitudinally mounted to the valve body of the reversible valve permits its vertical installment, thus remarkably reducing horizontal space required therefor.

Four-way valve for reversible refrigeration cycle

A transfer valve comprising three ports including
a first, second, and third ports 17, 18, and 19 includes
a pilot supply channel 22 for supplying a pilot fluid to
a pilot valve 13, and the pilot supply channel 22 is
connected to the first and the third ports 17 and 19 via
check valves 41, 42, and 43, respectively.

Pilot 3-port transfer valve

The invention relates to a reversing control valve for the tipping bucket oil cylinder of a dump truck, wherein a new structure and a new control mode are designed, the original hydraulic control mode is removed, and the new control mode is realized by the own pneumatic system of the dump truck, thus simplifying a control system, and reducing the production cost of a manufacturer for dump trucks. The valve has the characteristics of being low in flow resistance, small in volume, resistant to high pressure, strong in anti-pollution capacity, simple in structure, long in service life, and the like, and is mainly suitable for occasions with bad working environments, such as large mining dump trucks.

Two-position three-way pneumatically-controlled hydraulic reversing device

The invention provides a novel buffering pressure-stabilizing valve used for a hydraulic motor. The novel buffering pressure-stabilizing valve is characterized by comprising a valve body, wherein a first oil channel, an oil return channel, a second oil channel, a brake relieving oil channel, a third oil channel, a fourth oil channel and a fifth oil channel are arranged in the valve body; the first oil channel is communicated with the third oil channel through a first valve core; the lower end of the third oil channel is communicated with a second cylindrical cavity of the second oil channel; the fourth oil channel is communicated with the brake relieving oil channel and a fourth cylindrical cavity of the second oil channel respectively; the fifth oil channel is communicated with the oil return channel and a fifth cylindrical cavity of the second oil channel; and a second valve core is arranged in the second oil channel and comprises a valve core body, a section of third cylindrical surface, a section of first cylindrical surface and a section of second cylindrical surface are arranged on the side surface of the valve core body, the third cylindrical surface and the first cylindrical surface are matched with a first cylindrical cavity and a third cylindrical cavity of the second oil channel respectively, and the second cylindrical surface is arranged in the fifth cylindrical cavity of the second oil channel. The novel buffering pressure-stabilizing valve is simple and reasonable in structure and has stable and reliable performance.

Novel buffering pressure-stabilizing valve used for hydraulic motor

A directional control valve for compressed air with an inlet port, at least one consumer port and at least one vent port includes a housing accommodating a control piston for controlling the connection between the inlet port, the consumer port and the vent port, and a one-way restrictor arrangement. The one-way restrictor arrangement is fitted directly within the housing between the vent port and the consumer port, transversely to the longitudinal axis of the control piston. In this manner, a flow of compressed air to the consumer is prevented upon occurrence of a dynamic pressure.

Directional control valve

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Directional control valve